Configure

   1 #! /usr/bin/env perl
   2 # -*- mode: perl; -*-
   3 # Copyright 2016-2021 The OpenSSL Project Authors. All Rights Reserved.
   4 #
   5 # Licensed under the Apache License 2.0 (the "License").  You may not use
   6 # this file except in compliance with the License.  You can obtain a copy
   7 # in the file LICENSE in the source distribution or at
   8 # https://www.openssl.org/source/license.html
   9
  10 ##  Configure -- OpenSSL source tree configuration script
  11
  12 use 5.10.0;
  13 use strict;
  14 use Config;
  15 use FindBin;
  16 use lib "$FindBin::Bin/util/perl";
  17 use File::Basename;
  18 use File::Spec::Functions qw/:DEFAULT abs2rel rel2abs splitdir/;
  19 use File::Path qw/mkpath/;
  20 use OpenSSL::fallback "$FindBin::Bin/external/perl/MODULES.txt";
  21 use OpenSSL::Glob;
  22 use OpenSSL::Template;
  23 use OpenSSL::config;
  24
  25 # see INSTALL.md for instructions.
  26
  27 my $orig_death_handler = $SIG{__DIE__};
  28 $SIG{__DIE__} = \&death_handler;
  29
  30 my $usage="Usage: Configure [no-<cipher> ...] [enable-<cipher> ...] [-Dxxx] [-lxxx] [-Lxxx] [-fxxx] [-Kxxx] [no-hw-xxx|no-hw] [[no-]threads] [[no-]shared] [[no-]zlib|zlib-dynamic] [no-asm] [no-egd] [sctp] [386] [--prefix=DIR] [--openssldir=OPENSSLDIR] [--with-xxx[=vvv]] [--config=FILE] os/compiler[:flags]\n";
  31
  32 # Options:
  33 #
  34 # --config      add the given configuration file, which will be read after
  35 #               any "Configurations*" files that are found in the same
  36 #               directory as this script.
  37 # --prefix      prefix for the OpenSSL installation, which includes the
  38 #               directories bin, lib, include, share/man, share/doc/openssl
  39 #               This becomes the value of INSTALLTOP in Makefile
  40 #               (Default: /usr/local)
  41 # --openssldir  OpenSSL data area, such as openssl.cnf, certificates and keys.
  42 #               If it's a relative directory, it will be added on the directory
  43 #               given with --prefix.
  44 #               This becomes the value of OPENSSLDIR in Makefile and in C.
  45 #               (Default: PREFIX/ssl)
  46 #
  47 # --cross-compile-prefix Add specified prefix to binutils components.
  48 #
  49 # --api         One of 0.9.8, 1.0.0, 1.0.1, 1.0.2, 1.1.0, 1.1.1, or 3.0
  50 #               Define the public APIs as they were for that version
  51 #               including patch releases.  If 'no-deprecated' is also
  52 #               given, do not compile support for interfaces deprecated
  53 #               up to and including the specified OpenSSL version.
  54 #
  55 # no-hw-xxx     do not compile support for specific crypto hardware.
  56 #               Generic OpenSSL-style methods relating to this support
  57 #               are always compiled but return NULL if the hardware
  58 #               support isn't compiled.
  59 # no-hw         do not compile support for any crypto hardware.
  60 # [no-]threads  [don't] try to create a library that is suitable for
  61 #               multithreaded applications (default is "threads" if we
  62 #               know how to do it)
  63 # [no-]shared   [don't] try to create shared libraries when supported.
  64 # [no-]pic      [don't] try to build position independent code when supported.
  65 #               If disabled, it also disables shared and dynamic-engine.
  66 # no-asm        do not use assembler
  67 # no-egd        do not compile support for the entropy-gathering daemon APIs
  68 # [no-]zlib     [don't] compile support for zlib compression.
  69 # zlib-dynamic  Like "zlib", but the zlib library is expected to be a shared
  70 #               library and will be loaded in run-time by the OpenSSL library.
  71 # sctp          include SCTP support
  72 # no-uplink     Don't build support for UPLINK interface.
  73 # enable-weak-ssl-ciphers
  74 #               Enable weak ciphers that are disabled by default.
  75 # 386           generate 80386 code in assembly modules
  76 # no-sse2       disables IA-32 SSE2 code in assembly modules, the above
  77 #               mentioned '386' option implies this one
  78 # no-<cipher>   build without specified algorithm (dsa, idea, rc5, ...)
  79 # -<xxx> +<xxx> All options which are unknown to the 'Configure' script are
  80 # /<xxx>        passed through to the compiler. Unix-style options beginning
  81 #               with a '-' or '+' are recognized, as well as Windows-style
  82 #               options beginning with a '/'. If the option contains arguments
  83 #               separated by spaces, then the URL-style notation %20 can be
  84 #               used for the space character in order to avoid having to quote
  85 #               the option. For example, -opt%20arg gets expanded to -opt arg.
  86 #               In fact, any ASCII character can be encoded as %xx using its
  87 #               hexadecimal encoding.
  88 # -static       while -static is also a pass-through compiler option (and
  89 #               as such is limited to environments where it's actually
  90 #               meaningful), it triggers a number configuration options,
  91 #               namely no-pic, no-shared and no-threads. It is
  92 #               argued that the only reason to produce statically linked
  93 #               binaries (and in context it means executables linked with
  94 #               -static flag, and not just executables linked with static
  95 #               libcrypto.a) is to eliminate dependency on specific run-time,
  96 #               a.k.a. libc version. The mentioned config options are meant
  97 #               to achieve just that. Unfortunately on Linux it's impossible
  98 #               to eliminate the dependency completely for openssl executable
  99 #               because of getaddrinfo and gethostbyname calls, which can
 100 #               invoke dynamically loadable library facility anyway to meet
 101 #               the lookup requests. For this reason on Linux statically
 102 #               linked openssl executable has rather debugging value than
 103 #               production quality.
 104 #
 105 # BN_LLONG      use the type 'long long' in crypto/bn/bn.h
 106 # RC4_CHAR      use 'char' instead of 'int' for RC4_INT in crypto/rc4/rc4.h
 107 # Following are set automatically by this script
 108 #
 109 # MD5_ASM       use some extra md5 assembler,
 110 # SHA1_ASM      use some extra sha1 assembler, must define L_ENDIAN for x86
 111 # RMD160_ASM    use some extra ripemd160 assembler,
 112 # SHA256_ASM    sha256_block is implemented in assembler
 113 # SHA512_ASM    sha512_block is implemented in assembler
 114 # AES_ASM       AES_[en|de]crypt is implemented in assembler
 115
 116 # Minimum warning options... any contributions to OpenSSL should at least
 117 # get past these.  Note that we only use these with C compilers, not with
 118 # C++ compilers.
 119
 120 # DEBUG_UNUSED enables __owur (warn unused result) checks.
 121 # -DPEDANTIC complements -pedantic and is meant to mask code that
 122 # is not strictly standard-compliant and/or implementation-specific,
 123 # e.g. inline assembly, disregards to alignment requirements, such
 124 # that -pedantic would complain about. Incidentally -DPEDANTIC has
 125 # to be used even in sanitized builds, because sanitizer too is
 126 # supposed to and does take notice of non-standard behaviour. Then
 127 # -pedantic with pre-C9x compiler would also complain about 'long
 128 # long' not being supported. As 64-bit algorithms are common now,
 129 # it grew impossible to resolve this without sizeable additional
 130 # code, so we just tell compiler to be pedantic about everything
 131 # but 'long long' type.
 132
 133 my @gcc_devteam_warn = qw(
 134     -DDEBUG_UNUSED
 135     -DPEDANTIC -pedantic -Wno-long-long
 136     -Wall
 137     -Wextra
 138     -Wno-unused-parameter
 139     -Wno-missing-field-initializers
 140     -Wswitch
 141     -Wsign-compare
 142     -Wshadow
 143     -Wformat
 144     -Wtype-limits
 145     -Wundef
 146     -Werror
 147     -Wmissing-prototypes
 148     -Wstrict-prototypes
 149 );
 150
 151 # These are used in addition to $gcc_devteam_warn when the compiler is clang.
 152 # TODO(openssl-team): fix problems and investigate if (at least) the
 153 # following warnings can also be enabled:
 154 #       -Wcast-align
 155 #       -Wunreachable-code -- no, too ugly/compiler-specific
 156 #       -Wlanguage-extension-token -- no, we use asm()
 157 #       -Wunused-macros -- no, too tricky for BN and _XOPEN_SOURCE etc
 158 #       -Wextended-offsetof -- no, needed in CMS ASN1 code
 159 my @clang_devteam_warn = qw(
 160     -Wno-unknown-warning-option
 161     -Wswitch-default
 162     -Wno-parentheses-equality
 163     -Wno-language-extension-token
 164     -Wno-extended-offsetof
 165     -Wconditional-uninitialized
 166     -Wincompatible-pointer-types-discards-qualifiers
 167     -Wmissing-variable-declarations
 168 );
 169
 170 my @cl_devteam_warn = qw(
 171     /WX
 172 );
 173
 174 my $strict_warnings = 0;
 175
 176 # As for $BSDthreads. Idea is to maintain "collective" set of flags,
 177 # which would cover all BSD flavors. -pthread applies to them all,
 178 # but is treated differently. OpenBSD expands is as -D_POSIX_THREAD
 179 # -lc_r, which is sufficient. FreeBSD 4.x expands it as -lc_r,
 180 # which has to be accompanied by explicit -D_THREAD_SAFE and
 181 # sometimes -D_REENTRANT. FreeBSD 5.x expands it as -lc_r, which
 182 # seems to be sufficient?
 183 our $BSDthreads="-pthread -D_THREAD_SAFE -D_REENTRANT";
 184
 185 #
 186 # API compatibility name to version number mapping.
 187 #
 188 my $apitable = {
 189     # This table expresses when API additions or changes can occur.
 190     # The numbering used changes from 3.0 and on because we updated
 191     # (solidified) our version numbering scheme at that point.
 192
 193     # From 3.0 and on, we internalise the given version number in decimal
 194     # as MAJOR * 10000 + MINOR * 100 + 0
 195     "3.0.0" => 30000,
 196     "3.0"   => 30000,
 197
 198     # Note that before 3.0, we didn't have the same version number scheme.
 199     # Still, the numbering we use here covers what we need.
 200     "1.1.1" => 10101,
 201     "1.1.0" => 10100,
 202     "1.0.2" => 10002,
 203     "1.0.1" => 10001,
 204     "1.0.0" => 10000,
 205     "0.9.8" =>   908,
 206 };
 207
 208 # For OpenSSL::config::get_platform
 209 my %guess_opts = ();
 210
 211 my $dryrun = 0;
 212
 213 our %table = ();
 214 our %config = ();
 215 our %withargs = ();
 216 our $now_printing;      # set to current entry's name in print_table_entry
 217                         # (todo: right thing would be to encapsulate name
 218                         # into %target [class] and make print_table_entry
 219                         # a method)
 220
 221 # Forward declarations ###############################################
 222
 223 # read_config(filename)
 224 #
 225 # Reads a configuration file and populates %table with the contents
 226 # (which the configuration file places in %targets).
 227 sub read_config;
 228
 229 # resolve_config(target)
 230 #
 231 # Resolves all the late evaluations, inheritances and so on for the
 232 # chosen target and any target it inherits from.
 233 sub resolve_config;
 234
 235
 236 # Information collection #############################################
 237
 238 # Unified build supports separate build dir
 239 my $srcdir = catdir(absolutedir(dirname($0))); # catdir ensures local syntax
 240 my $blddir = catdir(absolutedir("."));         # catdir ensures local syntax
 241
 242 # File::Spec::Unix doesn't detect case insensitivity, so we make sure to
 243 # check if the source and build directory are really the same, and make
 244 # them so.  This avoids all kinds of confusion later on.
 245 # We must check @File::Spec::ISA rather than using File::Spec->isa() to
 246 # know if File::Spec ended up loading File::Spec::Unix.
 247 $srcdir = $blddir
 248     if (grep(/::Unix$/, @File::Spec::ISA)
 249         && samedir($srcdir, $blddir));
 250
 251 my $dofile = abs2rel(catfile($srcdir, "util/dofile.pl"));
 252
 253 my $local_config_envname = 'OPENSSL_LOCAL_CONFIG_DIR';
 254
 255 $config{sourcedir} = abs2rel($srcdir, $blddir);
 256 $config{builddir} = abs2rel($blddir, $blddir);
 257 # echo -n 'holy hand grenade of antioch' | openssl sha256
 258 $config{FIPSKEY} =
 259     'f4556650ac31d35461610bac4ed81b1a181b2d8a43ea2854cbae22ca74560813';
 260
 261 # Collect reconfiguration information if needed
 262 my @argvcopy=@ARGV;
 263
 264 if (grep /^reconf(igure)?$/, @argvcopy) {
 265     die "reconfiguring with other arguments present isn't supported"
 266         if scalar @argvcopy > 1;
 267     if (-f "./configdata.pm") {
 268         my $file = "./configdata.pm";
 269         unless (my $return = do $file) {
 270             die "couldn't parse $file: $@" if $@;
 271             die "couldn't do $file: $!"    unless defined $return;
 272             die "couldn't run $file"       unless $return;
 273         }
 274
 275         @argvcopy = defined($configdata::config{perlargv}) ?
 276             @{$configdata::config{perlargv}} : ();
 277         die "Incorrect data to reconfigure, please do a normal configuration\n"
 278             if (grep(/^reconf/,@argvcopy));
 279         $config{perlenv} = $configdata::config{perlenv} // {};
 280     } else {
 281         die "Insufficient data to reconfigure, please do a normal configuration\n";
 282     }
 283 }
 284
 285 $config{perlargv} = [ @argvcopy ];
 286
 287 # Historical: if known directories in crypto/ have been removed, it means
 288 # that those sub-systems are disabled.
 289 # (the other option would be to removed them from the SUBDIRS statement in
 290 # crypto/build.info)
 291 # We reverse the input list for cosmetic purely reasons, to compensate that
 292 # 'unshift' adds at the front of the list (i.e. in reverse input order).
 293 foreach ( reverse sort( 'aes', 'aria', 'bf', 'camellia', 'cast', 'des', 'dh',
 294                         'dsa', 'ec', 'hmac', 'idea', 'md2', 'md5', 'mdc2',
 295                         'rc2', 'rc4', 'rc5', 'ripemd', 'seed', 'sha',
 296                         'sm2', 'sm3', 'sm4') ) {
 297     unshift @argvcopy, "no-$_" if ! -d catdir($srcdir, 'crypto', $_);
 298 }
 299
 300 # Collect version numbers
 301 my %version = ();
 302
 303 collect_information(
 304     collect_from_file(catfile($srcdir,'VERSION.dat')),
 305     qr/\s*(\w+)\s*=\s*(.*?)\s*$/ =>
 306         sub {
 307             # Only define it if there is a value at all
 308             if ($2 ne '') {
 309                 my $k = $1;
 310                 my $v = $2;
 311                 # Some values are quoted.  Trim the quotes
 312                 $v = $1 if $v =~ /^"(.*)"$/;
 313                 $version{uc $k} = $v;
 314             }
 315         },
 316     "OTHERWISE" =>
 317         sub { die "Something wrong with this line:\n$_\nin $srcdir/VERSION.dat" },
 318     );
 319
 320 $config{major} = $version{MAJOR} // 'unknown';
 321 $config{minor} = $version{MINOR} // 'unknown';
 322 $config{patch} = $version{PATCH} // 'unknown';
 323 $config{prerelease} =
 324     defined $version{PRE_RELEASE_TAG} ? "-$version{PRE_RELEASE_TAG}" : '';
 325 $config{build_metadata} =
 326     defined $version{BUILD_METADATA} ? "+$version{BUILD_METADATA}" : '';
 327 $config{shlib_version} = $version{SHLIB_VERSION} // 'unknown';
 328 $config{release_date} = $version{RELEASE_DATE} // 'xx XXX xxxx';
 329
 330 $config{version} = "$config{major}.$config{minor}.$config{patch}";
 331 $config{full_version} = "$config{version}$config{prerelease}$config{build_metadata}";
 332
 333 die "erroneous version information in VERSION.dat: ",
 334     "$config{version}, $config{shlib_version}\n"
 335     unless (defined $version{MAJOR}
 336             && defined $version{MINOR}
 337             && defined $version{PATCH}
 338             && defined $version{SHLIB_VERSION});
 339
 340 # Collect target configurations
 341
 342 my $pattern = catfile(dirname($0), "Configurations", "*.conf");
 343 foreach (sort glob($pattern)) {
 344     &read_config($_);
 345 }
 346
 347 if (defined env($local_config_envname)) {
 348     if ($^O eq 'VMS') {
 349         # VMS environment variables are logical names,
 350         # which can be used as is
 351         $pattern = $local_config_envname . ':' . '*.conf';
 352     } else {
 353         $pattern = catfile(env($local_config_envname), '*.conf');
 354     }
 355
 356     foreach (sort glob($pattern)) {
 357         &read_config($_);
 358     }
 359 }
 360
 361 # Save away perl command information
 362 $config{perl_cmd} = $^X;
 363 $config{perl_version} = $Config{version};
 364 $config{perl_archname} = $Config{archname};
 365
 366 $config{prefix}="";
 367 $config{openssldir}="";
 368 $config{processor}="";
 369 $config{libdir}="";
 370 my $auto_threads=1;    # enable threads automatically? true by default
 371 my $default_ranlib;
 372
 373 # Known TLS and DTLS protocols
 374 my @tls = qw(ssl3 tls1 tls1_1 tls1_2 tls1_3);
 375 my @dtls = qw(dtls1 dtls1_2);
 376
 377 # Explicitly known options that are possible to disable.  They can
 378 # be regexps, and will be used like this: /^no-${option}$/
 379 # For developers: keep it sorted alphabetically
 380
 381 my @disablables = (
 382     "acvp_tests",
 383     "afalgeng",
 384     "aria",
 385     "asan",
 386     "asm",
 387     "async",
 388     "autoalginit",
 389     "autoerrinit",
 390     "autoload-config",
 391     "bf",
 392     "blake2",
 393     "buildtest-c++",
 394     "bulk",
 395     "camellia",
 396     "capieng",
 397     "cast",
 398     "chacha",
 399     "cmac",
 400     "cmp",
 401     "cms",
 402     "comp",
 403     "crypto-mdebug",
 404     "ct",
 405     "deprecated",
 406     "des",
 407     "devcryptoeng",
 408     "dgram",
 409     "dh",
 410     "dsa",
 411     "dso",
 412     "dtls",
 413     "dynamic-engine",
 414     "ec",
 415     "ec2m",
 416     "ecdh",
 417     "ecdsa",
 418     "ec_nistp_64_gcc_128",
 419     "egd",
 420     "engine",
 421     "err",
 422     "external-tests",
 423     "filenames",
 424     "fips",
 425     "fips-securitychecks",
 426     "fuzz-libfuzzer",
 427     "fuzz-afl",
 428     "gost",
 429     "idea",
 430     "ktls",
 431     "legacy",
 432     "makedepend",
 433     "md2",
 434     "md4",
 435     "mdc2",
 436     "module",
 437     "msan",
 438     "multiblock",
 439     "nextprotoneg",
 440     "pinshared",
 441     "ocb",
 442     "ocsp",
 443     "padlockeng",
 444     "pic",
 445     "poly1305",
 446     "posix-io",
 447     "psk",
 448     "rc2",
 449     "rc4",
 450     "rc5",
 451     "rdrand",
 452     "rfc3779",
 453     "rmd160",
 454     "scrypt",
 455     "sctp",
 456     "secure-memory",
 457     "seed",
 458     "shared",
 459     "siphash",
 460     "siv",
 461     "sm2",
 462     "sm3",
 463     "sm4",
 464     "sock",
 465     "srp",
 466     "srtp",
 467     "sse2",
 468     "ssl",
 469     "ssl-trace",
 470     "static-engine",
 471     "stdio",
 472     "tests",
 473     "threads",
 474     "tls",
 475     "trace",
 476     "ts",
 477     "ubsan",
 478     "ui-console",
 479     "unit-test",
 480     "uplink",
 481     "whirlpool",
 482     "weak-ssl-ciphers",
 483     "zlib",
 484     "zlib-dynamic",
 485     );
 486 foreach my $proto ((@tls, @dtls))
 487         {
 488         push(@disablables, $proto);
 489         push(@disablables, "$proto-method") unless $proto eq "tls1_3";
 490         }
 491
 492 # Internal disablables, for aliasing purposes.  They serve no special
 493 # purpose here, but allow scripts to get to know them through configdata.pm,
 494 # where these are merged with @disablables.
 495 # The actual aliasing mechanism is done via %disable_cascades
 496 my @disablables_int = qw(
 497     crmf
 498     );
 499
 500 my %deprecated_disablables = (
 501     "ssl2" => undef,
 502     "buf-freelists" => undef,
 503     "crypto-mdebug-backtrace" => undef,
 504     "hw" => "hw",               # causes cascade, but no macro
 505     "hw-padlock" => "padlockeng",
 506     "ripemd" => "rmd160",
 507     "ui" => "ui-console",
 508     "heartbeats" => undef,
 509     );
 510
 511 # All of the following are disabled by default:
 512
 513 our %disabled = ( # "what"         => "comment"
 514                   "asan"                => "default",
 515                   "buildtest-c++"       => "default",
 516                   "crypto-mdebug"       => "default",
 517                   "crypto-mdebug-backtrace" => "default",
 518                   "devcryptoeng"        => "default",
 519                   "ec_nistp_64_gcc_128" => "default",
 520                   "egd"                 => "default",
 521                   "external-tests"      => "default",
 522                   "fuzz-libfuzzer"      => "default",
 523                   "fuzz-afl"            => "default",
 524                   "md2"                 => "default",
 525                   "msan"                => "default",
 526                   "rc5"                 => "default",
 527                   "sctp"                => "default",
 528                   "ssl-trace"           => "default",
 529                   "ssl3"                => "default",
 530                   "ssl3-method"         => "default",
 531                   "trace"               => "default",
 532                   "ubsan"               => "default",
 533                   "unit-test"           => "default",
 534                   "weak-ssl-ciphers"    => "default",
 535                   "zlib"                => "default",
 536                   "zlib-dynamic"        => "default",
 537                   "ktls"                => "default",
 538                 );
 539
 540 # Note: => pair form used for aesthetics, not to truly make a hash table
 541 my @disable_cascades = (
 542     # "what"            => [ "cascade", ... ]
 543     "bulk"              => [ "shared", "dso",
 544                              "aria", "async", "autoload-config",
 545                              "blake2", "bf", "camellia", "cast", "chacha",
 546                              "cmac", "cms", "cmp", "comp", "ct",
 547                              "des", "dgram", "dh", "dsa",
 548                              "ec", "engine",
 549                              "filenames",
 550                              "idea", "ktls",
 551                              "md4", "multiblock", "nextprotoneg",
 552                              "ocsp", "ocb", "poly1305", "psk",
 553                              "rc2", "rc4", "rmd160",
 554                              "seed", "siphash", "siv",
 555                              "sm3", "sm4", "srp",
 556                              "srtp", "ssl3-method",
 557                              "ts", "ui-console", "whirlpool",
 558                              "fips-securitychecks" ],
 559     sub { $config{processor} eq "386" }
 560                         => [ "sse2" ],
 561     "ssl"               => [ "ssl3" ],
 562     "ssl3-method"       => [ "ssl3" ],
 563     "zlib"              => [ "zlib-dynamic" ],
 564     "des"               => [ "mdc2" ],
 565     "ec"                => [ "ec2m", "ecdsa", "ecdh", "sm2", "gost" ],
 566     sub { $disabled{"ec"} && $disabled{"dh"} }
 567                         => [ "tls1_3" ],
 568     "dgram"             => [ "dtls", "sctp" ],
 569     "sock"              => [ "dgram" ],
 570     "dtls"              => [ @dtls ],
 571     sub { 0 == scalar grep { !$disabled{$_} } @dtls }
 572                         => [ "dtls" ],
 573
 574     "tls"               => [ @tls ],
 575     sub { 0 == scalar grep { !$disabled{$_} } @tls }
 576                         => [ "tls" ],
 577
 578     "crypto-mdebug"     => [ "crypto-mdebug-backtrace" ],
 579
 580     # If no modules, then no dynamic engines either
 581     "module"            => [ "dynamic-engine" ],
 582
 583     # Without shared libraries, dynamic engines aren't possible.
 584     # This is due to them having to link with libcrypto and register features
 585     # using the ENGINE functionality, and since that relies on global tables,
 586     # those *have* to be exacty the same as the ones accessed from the app,
 587     # which cannot be guaranteed if shared libraries aren't present.
 588     # (note that even with shared libraries, both the app and dynamic engines
 589     # must be linked with the same library)
 590     "shared"            => [ "dynamic-engine", "uplink" ],
 591     "dso"               => [ "dynamic-engine", "module" ],
 592     # Other modules don't necessarily have to link with libcrypto, so shared
 593     # libraries do not have to be a condition to produce those.
 594
 595     # Without position independent code, there can be no shared libraries
 596     # or modules.
 597     "pic"               => [ "shared", "module" ],
 598
 599     "module"            => [ "fips", "dso" ],
 600
 601     "engine"            => [ "dynamic-engine", grep(/eng$/, @disablables) ],
 602     "hw"                => [ "padlockeng" ],
 603
 604     # no-autoalginit is only useful when building non-shared
 605     "autoalginit"       => [ "shared", "apps" ],
 606
 607     "stdio"             => [ "apps", "capieng", "egd" ],
 608     "apps"              => [ "tests" ],
 609     "tests"             => [ "external-tests" ],
 610     "comp"              => [ "zlib" ],
 611     "sm3"               => [ "sm2" ],
 612     sub { !$disabled{"unit-test"} } => [ "heartbeats" ],
 613
 614     sub { !$disabled{"msan"} } => [ "asm" ],
 615
 616     sub { $disabled{cmac}; } => [ "siv" ],
 617     "legacy"                 => [ "md2" ],
 618
 619     "cmp"               => [ "crmf" ],
 620
 621     sub { $disabled{"deprecated-3.0"} }
 622           => [ "engine" ]
 623     );
 624
 625 # Avoid protocol support holes.  Also disable all versions below N, if version
 626 # N is disabled while N+1 is enabled.
 627 #
 628 my @list = (reverse @tls);
 629 while ((my $first, my $second) = (shift @list, shift @list)) {
 630     last unless @list;
 631     push @disable_cascades, ( sub { !$disabled{$first} && $disabled{$second} }
 632                               => [ @list ] );
 633     unshift @list, $second;
 634 }
 635 my @list = (reverse @dtls);
 636 while ((my $first, my $second) = (shift @list, shift @list)) {
 637     last unless @list;
 638     push @disable_cascades, ( sub { !$disabled{$first} && $disabled{$second} }
 639                               => [ @list ] );
 640     unshift @list, $second;
 641 }
 642
 643 # Explicit "no-..." options will be collected in %disabled along with the defaults.
 644 # To remove something from %disabled, use "enable-foo".
 645 # For symmetry, "disable-foo" is a synonym for "no-foo".
 646
 647 # For the "make variables" CPPINCLUDES and CPPDEFINES, we support lists with
 648 # platform specific list separators.  Users from those platforms should
 649 # recognise those separators from how you set up the PATH to find executables.
 650 # The default is the Unix like separator, :, but as an exception, we also
 651 # support the space as separator.
 652 my $list_separator_re =
 653     { VMS           => qr/(?<!\^),/,
 654       MSWin32       => qr/(?<!\\);/ } -> {$^O} // qr/(?<!\\)[:\s]/;
 655 # All the "make variables" we support
 656 # Some get pre-populated for the sake of backward compatibility
 657 # (we supported those before the change to "make variable" support.
 658 my %user = (
 659     AR          => env('AR'),
 660     ARFLAGS     => [],
 661     AS          => undef,
 662     ASFLAGS     => [],
 663     CC          => env('CC'),
 664     CFLAGS      => [ env('CFLAGS') || () ],
 665     CXX         => env('CXX'),
 666     CXXFLAGS    => [ env('CXXFLAGS') || () ],
 667     CPP         => undef,
 668     CPPFLAGS    => [ env('CPPFLAGS') || () ],  # -D, -I, -Wp,
 669     CPPDEFINES  => [],  # Alternative for -D
 670     CPPINCLUDES => [],  # Alternative for -I
 671     CROSS_COMPILE => env('CROSS_COMPILE'),
 672     HASHBANGPERL=> env('HASHBANGPERL') || env('PERL'),
 673     LD          => undef,
 674     LDFLAGS     => [ env('LDFLAGS') || () ],  # -L, -Wl,
 675     LDLIBS      => [ env('LDLIBS') || () ],  # -l
 676     MT          => undef,
 677     MTFLAGS     => [],
 678     PERL        => env('PERL') || ($^O ne "VMS" ? $^X : "perl"),
 679     RANLIB      => env('RANLIB'),
 680     RC          => env('RC') || env('WINDRES'),
 681     RCFLAGS     => [ env('RCFLAGS') || () ],
 682     RM          => undef,
 683    );
 684 # Info about what "make variables" may be prefixed with the cross compiler
 685 # prefix.  This should NEVER mention any such variable with a list for value.
 686 my @user_crossable = qw ( AR AS CC CXX CPP LD MT RANLIB RC );
 687 # The same but for flags given as Configure options.  These are *additional*
 688 # input, as opposed to the VAR=string option that override the corresponding
 689 # config target attributes
 690 my %useradd = (
 691     CPPDEFINES  => [],
 692     CPPINCLUDES => [],
 693     CPPFLAGS    => [],
 694     CFLAGS      => [],
 695     CXXFLAGS    => [],
 696     LDFLAGS     => [],
 697     LDLIBS      => [],
 698     RCFLAGS     => [],
 699    );
 700
 701 my %user_synonyms = (
 702     HASHBANGPERL=> 'PERL',
 703     RC          => 'WINDRES',
 704    );
 705
 706 # Some target attributes have been renamed, this is the translation table
 707 my %target_attr_translate =(
 708     ar          => 'AR',
 709     as          => 'AS',
 710     cc          => 'CC',
 711     cxx         => 'CXX',
 712     cpp         => 'CPP',
 713     hashbangperl => 'HASHBANGPERL',
 714     ld          => 'LD',
 715     mt          => 'MT',
 716     ranlib      => 'RANLIB',
 717     rc          => 'RC',
 718     rm          => 'RM',
 719    );
 720
 721 # Initialisers coming from 'config' scripts
 722 $config{defines} = [ split(/$list_separator_re/, env('__CNF_CPPDEFINES')) ];
 723 $config{includes} = [ split(/$list_separator_re/, env('__CNF_CPPINCLUDES')) ];
 724 $config{cppflags} = [ env('__CNF_CPPFLAGS') || () ];
 725 $config{cflags} = [ env('__CNF_CFLAGS') || () ];
 726 $config{cxxflags} = [ env('__CNF_CXXFLAGS') || () ];
 727 $config{lflags} = [ env('__CNF_LDFLAGS') || () ];
 728 $config{ex_libs} = [ env('__CNF_LDLIBS') || () ];
 729
 730 $config{openssl_api_defines}=[];
 731 $config{openssl_sys_defines}=[];
 732 $config{openssl_feature_defines}=[];
 733 $config{options}="";
 734 $config{build_type} = "release";
 735 my $target="";
 736
 737 my %cmdvars = ();               # Stores FOO='blah' type arguments
 738 my %unsupported_options = ();
 739 my %deprecated_options = ();
 740 # If you change this, update apps/version.c
 741 my @known_seed_sources = qw(getrandom devrandom os egd none rdcpu librandom);
 742 my @seed_sources = ();
 743 while (@argvcopy)
 744         {
 745         $_ = shift @argvcopy;
 746
 747         # Support env variable assignments among the options
 748         if (m|^(\w+)=(.+)?$|)
 749                 {
 750                 $cmdvars{$1} = $2;
 751                 # Every time a variable is given as a configuration argument,
 752                 # it acts as a reset if the variable.
 753                 if (exists $user{$1})
 754                         {
 755                         $user{$1} = ref $user{$1} eq "ARRAY" ? [] : undef;
 756                         }
 757                 #if (exists $useradd{$1})
 758                 #       {
 759                 #       $useradd{$1} = [];
 760                 #       }
 761                 next;
 762                 }
 763
 764         # VMS is a case insensitive environment, and depending on settings
 765         # out of our control, we may receive options uppercased.  Let's
 766         # downcase at least the part before any equal sign.
 767         if ($^O eq "VMS")
 768                 {
 769                 s/^([^=]*)/lc($1)/e;
 770                 }
 771
 772         # some people just can't read the instructions, clang people have to...
 773         s/^-no-(?!integrated-as)/no-/;
 774
 775         # rewrite some options in "enable-..." form
 776         s /^-?-?shared$/enable-shared/;
 777         s /^sctp$/enable-sctp/;
 778         s /^threads$/enable-threads/;
 779         s /^zlib$/enable-zlib/;
 780         s /^zlib-dynamic$/enable-zlib-dynamic/;
 781
 782         if (/^(no|disable|enable)-(.+)$/)
 783                 {
 784                 my $word = $2;
 785                 if ($word !~ m|hw(?:-.+)| # special treatment for hw regexp opt
 786                         && !exists $deprecated_disablables{$word}
 787                         && !grep { $word eq $_ } @disablables)
 788                         {
 789                         $unsupported_options{$_} = 1;
 790                         next;
 791                         }
 792                 }
 793         if (/^no-(.+)$/ || /^disable-(.+)$/)
 794                 {
 795                 foreach my $proto ((@tls, @dtls))
 796                         {
 797                         if ($1 eq "$proto-method")
 798                                 {
 799                                 $disabled{"$proto"} = "option($proto-method)";
 800                                 last;
 801                                 }
 802                         }
 803                 if ($1 eq "dtls")
 804                         {
 805                         foreach my $proto (@dtls)
 806                                 {
 807                                 $disabled{$proto} = "option(dtls)";
 808                                 }
 809                         $disabled{"dtls"} = "option(dtls)";
 810                         }
 811                 elsif ($1 eq "ssl")
 812                         {
 813                         # Last one of its kind
 814                         $disabled{"ssl3"} = "option(ssl)";
 815                         }
 816                 elsif ($1 eq "tls")
 817                         {
 818                         # XXX: Tests will fail if all SSL/TLS
 819                         # protocols are disabled.
 820                         foreach my $proto (@tls)
 821                                 {
 822                                 $disabled{$proto} = "option(tls)";
 823                                 }
 824                         }
 825                 elsif ($1 eq "static-engine")
 826                         {
 827                         delete $disabled{"dynamic-engine"};
 828                         }
 829                 elsif ($1 eq "dynamic-engine")
 830                         {
 831                         $disabled{"dynamic-engine"} = "option";
 832                         }
 833                 elsif (exists $deprecated_disablables{$1})
 834                         {
 835                         $deprecated_options{$_} = 1;
 836                         if (defined $deprecated_disablables{$1})
 837                                 {
 838                                 $disabled{$deprecated_disablables{$1}} = "option";
 839                                 }
 840                         }
 841                 elsif ($1 =~ m|hw(?:-.+)|) # deprecate hw options in regexp form
 842                         {
 843                         $deprecated_options{$_} = 1;
 844                         }
 845                 else
 846                         {
 847                         $disabled{$1} = "option";
 848                         }
 849                 # No longer an automatic choice
 850                 $auto_threads = 0 if ($1 eq "threads");
 851                 }
 852         elsif (/^enable-(.+)$/)
 853                 {
 854                 if ($1 eq "static-engine")
 855                         {
 856                         $disabled{"dynamic-engine"} = "option";
 857                         }
 858                 elsif ($1 eq "dynamic-engine")
 859                         {
 860                         delete $disabled{"dynamic-engine"};
 861                         }
 862                 elsif ($1 eq "zlib-dynamic")
 863                         {
 864                         delete $disabled{"zlib"};
 865                         }
 866                 my $algo = $1;
 867                 delete $disabled{$algo};
 868
 869                 # No longer an automatic choice
 870                 $auto_threads = 0 if ($1 eq "threads");
 871                 }
 872         elsif (/^-d$/)          # From older 'config'
 873                 {
 874                 $config{build_type} = "debug";
 875                 }
 876         elsif (/^-v$/)          # From older 'config'
 877                 {
 878                 $guess_opts{verbose} = 1;
 879                 }
 880         elsif (/^-w$/)          # From older 'config'
 881                 {
 882                 $guess_opts{nowait} = 1;
 883                 }
 884         elsif (/^-t$/)          # From older 'config'
 885                 {
 886                 $dryrun = 1;
 887                 }
 888         elsif (/^--strict-warnings$/)
 889                 {
 890                 # Pretend that our strict flags is a C flag, and replace it
 891                 # with the proper flags later on
 892                 push @{$useradd{CFLAGS}}, '--ossl-strict-warnings';
 893                 $strict_warnings=1;
 894                 }
 895         elsif (/^--debug$/)
 896                 {
 897                 $config{build_type} = "debug";
 898                 }
 899         elsif (/^--release$/)
 900                 {
 901                 $config{build_type} = "release";
 902                 }
 903         elsif (/^386$/)
 904                 { $config{processor}=386; }
 905         elsif (/^fips$/)
 906                 {
 907                 die "FIPS mode not supported\n";
 908                 }
 909         elsif (/^rsaref$/)
 910                 {
 911                 # No RSAref support any more since it's not needed.
 912                 # The check for the option is there so scripts aren't
 913                 # broken
 914                 }
 915         elsif (/^nofipscanistercheck$/)
 916                 {
 917                 die "FIPS mode not supported\n";
 918                 }
 919         elsif (m|^[-+/]|)
 920                 {
 921                 if (/^--prefix=(.*)$/)
 922                         {
 923                         $config{prefix}=$1;
 924                         die "Directory given with --prefix MUST be absolute\n"
 925                                 unless file_name_is_absolute($config{prefix});
 926                         }
 927                 elsif (/^--api=(.*)$/)
 928                         {
 929                         my $api = $1;
 930                         die "Unknown API compatibility level $api"
 931                                 unless defined $apitable->{$api};
 932                         $config{api}=$apitable->{$api};
 933                         }
 934                 elsif (/^--libdir=(.*)$/)
 935                         {
 936                         $config{libdir}=$1;
 937                         }
 938                 elsif (/^--openssldir=(.*)$/)
 939                         {
 940                         $config{openssldir}=$1;
 941                         }
 942                 elsif (/^--with-zlib-lib=(.*)$/)
 943                         {
 944                         $withargs{zlib_lib}=$1;
 945                         }
 946                 elsif (/^--with-zlib-include=(.*)$/)
 947                         {
 948                         $withargs{zlib_include}=$1;
 949                         }
 950                 elsif (/^--with-fuzzer-lib=(.*)$/)
 951                         {
 952                         $withargs{fuzzer_lib}=$1;
 953                         }
 954                 elsif (/^--with-fuzzer-include=(.*)$/)
 955                         {
 956                         $withargs{fuzzer_include}=$1;
 957                         }
 958                 elsif (/^--with-rand-seed=(.*)$/)
 959                         {
 960                         foreach my $x (split(m|,|, $1))
 961                             {
 962                             die "Unknown --with-rand-seed choice $x\n"
 963                                 if ! grep { $x eq $_ } @known_seed_sources;
 964                             push @seed_sources, $x;
 965                             }
 966                         }
 967                 elsif (/^--fips-key=(.*)$/)
 968                         {
 969                         $user{FIPSKEY}=lc($1);
 970                         die "Non-hex character in FIPS key\n"
 971                            if $user{FIPSKEY} =~ /[^a-f0-9]/;
 972                         die "FIPS key must have even number of characters\n"
 973                            if length $1 & 1;
 974                         die "FIPS key too long (64 bytes max)\n"
 975                            if length $1 > 64;
 976                         }
 977                 elsif (/^--cross-compile-prefix=(.*)$/)
 978                         {
 979                         $user{CROSS_COMPILE}=$1;
 980                         }
 981                 elsif (/^--config=(.*)$/)
 982                         {
 983                         read_config $1;
 984                         }
 985                 elsif (/^-l(.*)$/)
 986                         {
 987                         push @{$useradd{LDLIBS}}, $_;
 988                         }
 989                 elsif (/^-framework$/)
 990                         {
 991                         push @{$useradd{LDLIBS}}, $_, shift(@argvcopy);
 992                         }
 993                 elsif (/^-L(.*)$/ or /^-Wl,/)
 994                         {
 995                         push @{$useradd{LDFLAGS}}, $_;
 996                         }
 997                 elsif (/^-rpath$/ or /^-R$/)
 998                         # -rpath is the OSF1 rpath flag
 999                         # -R is the old Solaris rpath flag
1000                         {
1001                         my $rpath = shift(@argvcopy) || "";
1002                         $rpath .= " " if $rpath ne "";
1003                         push @{$useradd{LDFLAGS}}, $_, $rpath;
1004                         }
1005                 elsif (/^-static$/)
1006                         {
1007                         push @{$useradd{LDFLAGS}}, $_;
1008                         }
1009                 elsif (m|^[-/]D(.*)$|)
1010                         {
1011                         push @{$useradd{CPPDEFINES}}, $1;
1012                         }
1013                 elsif (m|^[-/]I(.*)$|)
1014                         {
1015                         push @{$useradd{CPPINCLUDES}}, $1;
1016                         }
1017                 elsif (/^-Wp,$/)
1018                         {
1019                         push @{$useradd{CPPFLAGS}}, $1;
1020                         }
1021                 else    # common if (/^[-+]/), just pass down...
1022                         {
1023                         # Treat %xx as an ASCII code (e.g. replace %20 by a space character).
1024                         # This provides a simple way to pass options with arguments separated
1025                         # by spaces without quoting (e.g. -opt%20arg translates to -opt arg).
1026                         $_ =~ s/%([0-9a-f]{1,2})/chr(hex($1))/gei;
1027                         push @{$useradd{CFLAGS}}, $_;
1028                         push @{$useradd{CXXFLAGS}}, $_;
1029                         }
1030                 }
1031         elsif (m|^/|)
1032                 {
1033                 # Treat %xx as an ASCII code (e.g. replace %20 by a space character).
1034                 # This provides a simple way to pass options with arguments separated
1035                 # by spaces without quoting (e.g. /opt%20arg translates to /opt arg).
1036                 $_ =~ s/%([0-9a-f]{1,2})/chr(hex($1))/gei;
1037                 push @{$useradd{CFLAGS}}, $_;
1038                 push @{$useradd{CXXFLAGS}}, $_;
1039                 }
1040         else
1041                 {
1042                 die "target already defined - $target (offending arg: $_)\n" if ($target ne "");
1043                 $target=$_;
1044                 }
1045         unless ($_ eq $target || /^no-/ || /^disable-/)
1046                 {
1047                 # "no-..." follows later after implied deactivations
1048                 # have been derived.  (Don't take this too seriously,
1049                 # we really only write OPTIONS to the Makefile out of
1050                 # nostalgia.)
1051
1052                 if ($config{options} eq "")
1053                         { $config{options} = $_; }
1054                 else
1055                         { $config{options} .= " ".$_; }
1056                 }
1057         }
1058
1059 if (keys %deprecated_options)
1060         {
1061         warn "***** Deprecated options: ",
1062                 join(", ", keys %deprecated_options), "\n";
1063         }
1064 if (keys %unsupported_options)
1065         {
1066         die "***** Unsupported options: ",
1067                 join(", ", keys %unsupported_options), "\n";
1068         }
1069
1070 # If any %useradd entry has been set, we must check that the "make
1071 # variables" haven't been set.  We start by checking of any %useradd entry
1072 # is set.
1073 if (grep { scalar @$_ > 0 } values %useradd) {
1074     # Hash of env / make variables names.  The possible values are:
1075     # 1 - "make vars"
1076     # 2 - %useradd entry set
1077     # 3 - both set
1078     my %detected_vars =
1079         map { my $v = 0;
1080               $v += 1 if $cmdvars{$_};
1081               $v += 2 if @{$useradd{$_}};
1082               $_ => $v }
1083         keys %useradd;
1084
1085     # If any of the corresponding "make variables" is set, we error
1086     if (grep { $_ & 1 } values %detected_vars) {
1087         my $names = join(', ', grep { $detected_vars{$_} > 0 }
1088                                sort keys %detected_vars);
1089         die <<"_____";
1090 ***** Mixing make variables and additional compiler/linker flags as
1091 ***** configure command line option is not permitted.
1092 ***** Affected make variables: $names
1093 _____
1094     }
1095 }
1096
1097 # Check through all supported command line variables to see if any of them
1098 # were set, and canonicalise the values we got.  If no compiler or linker
1099 # flag or anything else that affects %useradd was set, we also check the
1100 # environment for values.
1101 my $anyuseradd =
1102     grep { defined $_ && (ref $_ ne 'ARRAY' || @$_) } values %useradd;
1103 foreach (keys %user) {
1104     my $value = $cmdvars{$_};
1105     $value //= env($_) unless $anyuseradd;
1106     $value //=
1107         defined $user_synonyms{$_} ? $cmdvars{$user_synonyms{$_}} : undef;
1108     $value //= defined $user_synonyms{$_} ? env($user_synonyms{$_}) : undef
1109         unless $anyuseradd;
1110
1111     if (defined $value) {
1112         if (ref $user{$_} eq 'ARRAY') {
1113             if ($_ eq 'CPPDEFINES' || $_ eq 'CPPINCLUDES') {
1114                 $user{$_} = [ split /$list_separator_re/, $value ];
1115             } else {
1116                 $user{$_} = [ $value ];
1117             }
1118         } elsif (!defined $user{$_}) {
1119             $user{$_} = $value;
1120         }
1121     }
1122 }
1123
1124 if (grep { /-rpath\b/ } ($user{LDFLAGS} ? @{$user{LDFLAGS}} : ())
1125     && !$disabled{shared}
1126     && !($disabled{asan} && $disabled{msan} && $disabled{ubsan})) {
1127     die "***** Cannot simultaneously use -rpath, shared libraries, and\n",
1128         "***** any of asan, msan or ubsan\n";
1129 }
1130
1131 # If no target was given, try guessing.
1132 unless ($target) {
1133     my %system_config = OpenSSL::config::get_platform(%guess_opts, %user);
1134
1135     # The $system_config{disable} is used to populate %disabled with
1136     # entries that aren't already there.
1137     foreach ( @{$system_config{disable} // []} ) {
1138         $disabled{$_} = 'system' unless defined $disabled{$_};
1139     }
1140     delete $system_config{disable};
1141
1142     # Override config entries with stuff from the guesser.
1143     # It's assumed that this really is nothing new.
1144     %config = ( %config, %system_config );
1145     $target = $system_config{target};
1146 }
1147
1148 sub disable {
1149     my $disable_type = shift;
1150
1151     for (@_) {
1152         $disabled{$_} = $disable_type;
1153     }
1154
1155     my @tocheckfor = (@_ ? @_ : keys %disabled);
1156     while (@tocheckfor) {
1157         my %new_tocheckfor = ();
1158         my @cascade_copy = (@disable_cascades);
1159         while (@cascade_copy) {
1160             my ($test, $descendents) =
1161                 (shift @cascade_copy, shift @cascade_copy);
1162             if (ref($test) eq "CODE" ? $test->() : defined($disabled{$test})) {
1163                 foreach (grep { !defined($disabled{$_}) } @$descendents) {
1164                     $new_tocheckfor{$_} = 1; $disabled{$_} = "cascade";
1165                 }
1166             }
1167         }
1168         @tocheckfor = (keys %new_tocheckfor);
1169     }
1170 }
1171 disable();                     # First cascade run
1172
1173 our $die = sub { die @_; };
1174 if ($target eq "TABLE") {
1175     local $die = sub { warn @_; };
1176     foreach (sort keys %table) {
1177         print_table_entry($_, "TABLE");
1178     }
1179     exit 0;
1180 }
1181
1182 if ($target eq "LIST") {
1183     foreach (sort keys %table) {
1184         print $_,"\n" unless $table{$_}->{template};
1185     }
1186     exit 0;
1187 }
1188
1189 if ($target eq "HASH") {
1190     local $die = sub { warn @_; };
1191     print "%table = (\n";
1192     foreach (sort keys %table) {
1193         print_table_entry($_, "HASH");
1194     }
1195     exit 0;
1196 }
1197
1198 print "Configuring OpenSSL version $config{full_version} ";
1199 print "for target $target\n";
1200
1201 if (scalar(@seed_sources) == 0) {
1202     print "Using os-specific seed configuration\n";
1203     push @seed_sources, 'os';
1204 }
1205 if (scalar(grep { $_ eq 'egd' } @seed_sources) > 0) {
1206     delete $disabled{'egd'};
1207 }
1208 if (scalar(grep { $_ eq 'none' } @seed_sources) > 0) {
1209     die "Cannot seed with none and anything else" if scalar(@seed_sources) > 1;
1210     warn <<_____ if scalar(@seed_sources) == 1;
1211
1212 ============================== WARNING ===============================
1213 You have selected the --with-rand-seed=none option, which effectively
1214 disables automatic reseeding of the OpenSSL random generator.
1215 All operations depending on the random generator such as creating keys
1216 will not work unless the random generator is seeded manually by the
1217 application.
1218
1219 Please read the 'Note on random number generation' section in the
1220 INSTALL.md instructions and the RAND_DRBG(7) manual page for more
1221 details.
1222 ============================== WARNING ===============================
1223
1224 _____
1225 }
1226 push @{$config{openssl_feature_defines}},
1227      map { (my $x = $_) =~ tr|[\-a-z]|[_A-Z]|; "OPENSSL_RAND_SEED_$x" }
1228         @seed_sources;
1229
1230 # Backward compatibility?
1231 if ($target =~ m/^CygWin32(-.*)$/) {
1232     $target = "Cygwin".$1;
1233 }
1234
1235 # Support for legacy targets having a name starting with 'debug-'
1236 my ($d, $t) = $target =~ m/^(debug-)?(.*)$/;
1237 if ($d) {
1238     $config{build_type} = "debug";
1239
1240     # If we do not find debug-foo in the table, the target is set to foo.
1241     if (!$table{$target}) {
1242         $target = $t;
1243     }
1244 }
1245
1246 if ($target) {
1247     # It's possible that we have different config targets for specific
1248     # toolchains, so we try to detect them, and go for the plain config
1249     # target if not.
1250     my $found;
1251     foreach ( ( "$target-$user{CC}", "$target", undef ) ) {
1252         $found=$_ if $table{$_} && !$table{$_}->{template};
1253         last if $found;
1254     }
1255     $target = $found;
1256 } else {
1257     # If we don't have a config target now, we try the C compiler as we
1258     # fallback
1259     my $cc = $user{CC} // 'cc';
1260     $target = $cc if $table{$cc} && !$table{$cc}->{template};
1261 }
1262
1263 &usage unless $target;
1264
1265 exit 0 if $dryrun;              # From older 'config'
1266
1267 $config{target} = $target;
1268 my %target = resolve_config($target);
1269
1270 foreach (keys %target_attr_translate) {
1271     $target{$target_attr_translate{$_}} = $target{$_}
1272         if $target{$_};
1273     delete $target{$_};
1274 }
1275
1276 %target = ( %{$table{DEFAULTS}}, %target );
1277
1278 my %conf_files = map { $_ => 1 } (@{$target{_conf_fname_int}});
1279 $config{conf_files} = [ sort keys %conf_files ];
1280
1281 # Using sub disable within these loops may prove fragile, so we run
1282 # a cascade afterwards
1283 foreach my $feature (@{$target{disable}}) {
1284     if (exists $deprecated_disablables{$feature}) {
1285         warn "***** config $target disables deprecated feature $feature\n";
1286     } elsif (!grep { $feature eq $_ } @disablables) {
1287         die "***** config $target disables unknown feature $feature\n";
1288     }
1289     $disabled{$feature} = 'config';
1290 }
1291 foreach my $feature (@{$target{enable}}) {
1292     if ("default" eq ($disabled{$feature} // "")) {
1293         if (exists $deprecated_disablables{$feature}) {
1294             warn "***** config $target enables deprecated feature $feature\n";
1295         } elsif (!grep { $feature eq $_ } @disablables) {
1296             die "***** config $target enables unknown feature $feature\n";
1297         }
1298         delete $disabled{$feature};
1299     }
1300 }
1301
1302 # If uplink_arch isn't defined, disable uplink
1303 $disabled{uplink} = 'no uplink_arch' unless (defined $target{uplink_arch});
1304 # If asm_arch isn't defined, disable asm
1305 $disabled{asm} = 'no asm_arch' unless (defined $target{asm_arch});
1306
1307 disable();                      # Run a cascade now
1308
1309 $target{CXXFLAGS}//=$target{CFLAGS} if $target{CXX};
1310 $target{cxxflags}//=$target{cflags} if $target{CXX};
1311 $target{exe_extension}=".exe" if ($config{target} eq "DJGPP");
1312 $target{exe_extension}=".pm"  if ($config{target} =~ /vos/);
1313
1314 # Fill %config with values from %user, and in case those are undefined or
1315 # empty, use values from %target (acting as a default).
1316 foreach (keys %user) {
1317     my $ref_type = ref $user{$_};
1318
1319     # Temporary function.  Takes an intended ref type (empty string or "ARRAY")
1320     # and a value that's to be coerced into that type.
1321     my $mkvalue = sub {
1322         my $type = shift;
1323         my $value = shift;
1324         my $undef_p = shift;
1325
1326         die "Too many arguments for \$mkvalue" if @_;
1327
1328         while (ref $value eq 'CODE') {
1329             $value = $value->();
1330         }
1331
1332         if ($type eq 'ARRAY') {
1333             return undef unless defined $value;
1334             return undef if ref $value ne 'ARRAY' && !$value;
1335             return undef if ref $value eq 'ARRAY' && !@$value;
1336             return [ $value ] unless ref $value eq 'ARRAY';
1337         }
1338         return undef unless $value;
1339         return $value;
1340     };
1341
1342     $config{$_} =
1343         $mkvalue->($ref_type, $user{$_})
1344         || $mkvalue->($ref_type, $target{$_});
1345     delete $config{$_} unless defined $config{$_};
1346 }
1347
1348 # Finish up %config by appending things the user gave us on the command line
1349 # apart from "make variables"
1350 foreach (keys %useradd) {
1351     # The must all be lists, so we assert that here
1352     die "internal error: \$useradd{$_} isn't an ARRAY\n"
1353         unless ref $useradd{$_} eq 'ARRAY';
1354
1355     if (defined $config{$_}) {
1356         push @{$config{$_}}, @{$useradd{$_}};
1357     } else {
1358         $config{$_} = [ @{$useradd{$_}} ];
1359     }
1360 }
1361 # At this point, we can forget everything about %user and %useradd,
1362 # because it's now all been merged into the corresponding $config entry
1363
1364 # Allow overriding the build file name
1365 $config{build_file} = env('BUILDFILE') || $target{build_file} || "Makefile";
1366
1367 # Make sure build_scheme is consistent.
1368 $target{build_scheme} = [ $target{build_scheme} ]
1369     if ref($target{build_scheme}) ne "ARRAY";
1370
1371 my ($builder, $builder_platform, @builder_opts) =
1372     @{$target{build_scheme}};
1373
1374 foreach my $checker (($builder_platform."-".$target{build_file}."-checker.pm",
1375                       $builder_platform."-checker.pm")) {
1376     my $checker_path = catfile($srcdir, "Configurations", $checker);
1377     if (-f $checker_path) {
1378         my $fn = $ENV{CONFIGURE_CHECKER_WARN}
1379             ? sub { warn $@; } : sub { die $@; };
1380         if (! do $checker_path) {
1381             if ($@) {
1382                 $fn->($@);
1383             } elsif ($!) {
1384                 $fn->($!);
1385             } else {
1386                 $fn->("The detected tools didn't match the platform\n");
1387             }
1388         }
1389         last;
1390     }
1391 }
1392
1393 push @{$config{defines}}, "NDEBUG"    if $config{build_type} eq "release";
1394
1395 if ($target =~ /^mingw/ && `$config{CC} --target-help 2>&1` =~ m/-mno-cygwin/m)
1396         {
1397         push @{$config{cflags}}, "-mno-cygwin";
1398         push @{$config{cxxflags}}, "-mno-cygwin" if $config{CXX};
1399         push @{$config{shared_ldflag}}, "-mno-cygwin";
1400         }
1401
1402 if ($target =~ /linux.*-mips/ && !$disabled{asm}
1403         && !grep { $_ !~ /-m(ips|arch=)/ } (@{$config{CFLAGS}})) {
1404         # minimally required architecture flags for assembly modules
1405         my $value;
1406         $value = '-mips2' if ($target =~ /mips32/);
1407         $value = '-mips3' if ($target =~ /mips64/);
1408         unshift @{$config{cflags}}, $value;
1409         unshift @{$config{cxxflags}}, $value if $config{CXX};
1410 }
1411
1412 # If threads aren't disabled, check how possible they are
1413 unless ($disabled{threads}) {
1414     if ($auto_threads) {
1415         # Enabled by default, disable it forcibly if unavailable
1416         if ($target{thread_scheme} eq "(unknown)") {
1417             disable("unavailable", 'threads');
1418         }
1419     } else {
1420         # The user chose to enable threads explicitly, let's see
1421         # if there's a chance that's possible
1422         if ($target{thread_scheme} eq "(unknown)") {
1423             # If the user asked for "threads" and we don't have internal
1424             # knowledge how to do it, [s]he is expected to provide any
1425             # system-dependent compiler options that are necessary.  We
1426             # can't truly check that the given options are correct, but
1427             # we expect the user to know what [s]He is doing.
1428             if (!@{$config{CFLAGS}} && !@{$config{CPPDEFINES}}) {
1429                 die "You asked for multi-threading support, but didn't\n"
1430                     ,"provide any system-specific compiler options\n";
1431             }
1432         }
1433     }
1434 }
1435
1436 # Find out if clang's sanitizers have been enabled with -fsanitize
1437 # flags and ensure that the corresponding %disabled elements area
1438 # removed to reflect that the sanitizers are indeed enabled.
1439 my %detected_sanitizers = ();
1440 foreach (grep /^-fsanitize=/, @{$config{CFLAGS} || []}) {
1441     (my $checks = $_) =~ s/^-fsanitize=//;
1442     foreach (split /,/, $checks) {
1443         my $d = { address       => 'asan',
1444                   undefined     => 'ubsan',
1445                   memory        => 'msan' } -> {$_};
1446         next unless defined $d;
1447
1448         $detected_sanitizers{$d} = 1;
1449         if (defined $disabled{$d}) {
1450             die "***** Conflict between disabling $d and enabling $_ sanitizer"
1451                 if $disabled{$d} ne "default";
1452             delete $disabled{$d};
1453         }
1454     }
1455 }
1456
1457 # If threads still aren't disabled, add a C macro to ensure the source
1458 # code knows about it.  Any other flag is taken care of by the configs.
1459 unless($disabled{threads}) {
1460     push @{$config{openssl_feature_defines}}, "OPENSSL_THREADS";
1461 }
1462
1463 my $no_shared_warn=0;
1464 if (($target{shared_target} // '') eq "")
1465         {
1466         $no_shared_warn = 1
1467             if (!$disabled{shared} || !$disabled{"dynamic-engine"});
1468         disable('no-shared-target', 'pic');
1469         }
1470
1471 if ($disabled{"dynamic-engine"}) {
1472         $config{dynamic_engines} = 0;
1473 } else {
1474         $config{dynamic_engines} = 1;
1475 }
1476
1477 unless ($disabled{asan} || defined $detected_sanitizers{asan}) {
1478     push @{$config{cflags}}, "-fsanitize=address";
1479 }
1480
1481 unless ($disabled{ubsan} || defined $detected_sanitizers{ubsan}) {
1482     # -DPEDANTIC or -fnosanitize=alignment may also be required on some
1483     # platforms.
1484     push @{$config{cflags}}, "-fsanitize=undefined", "-fno-sanitize-recover=all";
1485 }
1486
1487 unless ($disabled{msan} || defined $detected_sanitizers{msan}) {
1488   push @{$config{cflags}}, "-fsanitize=memory";
1489 }
1490
1491 unless ($disabled{"fuzz-libfuzzer"} && $disabled{"fuzz-afl"}
1492         && $disabled{asan} && $disabled{ubsan} && $disabled{msan}) {
1493     push @{$config{cflags}}, "-fno-omit-frame-pointer", "-g";
1494     push @{$config{cxxflags}}, "-fno-omit-frame-pointer", "-g" if $config{CXX};
1495 }
1496 #
1497 # Platform fix-ups
1498 #
1499
1500 # This saves the build files from having to check
1501 if ($disabled{pic})
1502         {
1503         foreach (qw(shared_cflag shared_cxxflag shared_cppflag
1504                     shared_defines shared_includes shared_ldflag
1505                     module_cflags module_cxxflags module_cppflags
1506                     module_defines module_includes module_lflags))
1507                 {
1508                 delete $config{$_};
1509                 $target{$_} = "";
1510                 }
1511         }
1512 else
1513         {
1514         push @{$config{lib_defines}}, "OPENSSL_PIC";
1515         }
1516
1517 if ($target{sys_id} ne "")
1518         {
1519         push @{$config{openssl_sys_defines}}, "OPENSSL_SYS_$target{sys_id}";
1520         }
1521
1522 my %predefined_C = compiler_predefined($config{CROSS_COMPILE}.$config{CC});
1523 my %predefined_CXX = $config{CXX}
1524     ? compiler_predefined($config{CROSS_COMPILE}.$config{CXX})
1525     : ();
1526
1527 unless ($disabled{asm}) {
1528     # big endian systems can use ELFv2 ABI
1529     if ($target eq "linux-ppc64") {
1530         $target{perlasm_scheme} = "linux64v2" if ($predefined_C{_CALL_ELF} == 2);
1531     }
1532 }
1533
1534 # Check for makedepend capabilities.
1535 if (!$disabled{makedepend}) {
1536     if ($config{target} =~ /^(VC|vms)-/) {
1537         # For VC- and vms- targets, there's nothing more to do here.  The
1538         # functionality is hard coded in the corresponding build files for
1539         # cl (Windows) and CC/DECC (VMS).
1540     } elsif (($predefined_C{__GNUC__} // -1) >= 3
1541              && !($predefined_C{__APPLE_CC__} && !$predefined_C{__clang__})) {
1542         # We know that GNU C version 3 and up as well as all clang
1543         # versions support dependency generation, but Xcode did not
1544         # handle $cc -M before clang support (but claims __GNUC__ = 3)
1545         $config{makedepprog} = "\$(CROSS_COMPILE)$config{CC}";
1546     } else {
1547         # In all other cases, we look for 'makedepend', and disable the
1548         # capability if not found.
1549         $config{makedepprog} = which('makedepend');
1550         disable('unavailable', 'makedepend') unless $config{makedepprog};
1551     }
1552 }
1553
1554 if (!$disabled{asm} && !$predefined_C{__MACH__} && $^O ne 'VMS') {
1555     # probe for -Wa,--noexecstack option...
1556     if ($predefined_C{__clang__}) {
1557         # clang has builtin assembler, which doesn't recognize --help,
1558         # but it apparently recognizes the option in question on all
1559         # supported platforms even when it's meaningless. In other words
1560         # probe would fail, but probed option always accepted...
1561         push @{$config{cflags}}, "-Wa,--noexecstack", "-Qunused-arguments";
1562     } else {
1563         my $cc = $config{CROSS_COMPILE}.$config{CC};
1564         open(PIPE, "$cc -Wa,--help -c -o null.$$.o -x assembler /dev/null 2>&1 |");
1565         while(<PIPE>) {
1566             if (m/--noexecstack/) {
1567                 push @{$config{cflags}}, "-Wa,--noexecstack";
1568                 last;
1569             }
1570         }
1571         close(PIPE);
1572         unlink("null.$$.o");
1573     }
1574 }
1575
1576 # Deal with bn_ops ###################################################
1577
1578 $config{bn_ll}                  =0;
1579 my $def_int="unsigned int";
1580 $config{rc4_int}                =$def_int;
1581 ($config{b64l},$config{b64},$config{b32})=(0,0,1);
1582
1583 my $count = 0;
1584 foreach (sort split(/\s+/,$target{bn_ops})) {
1585     $count++ if /SIXTY_FOUR_BIT|SIXTY_FOUR_BIT_LONG|THIRTY_TWO_BIT/;
1586     $config{bn_ll}=1                            if $_ eq 'BN_LLONG';
1587     $config{rc4_int}="unsigned char"            if $_ eq 'RC4_CHAR';
1588     ($config{b64l},$config{b64},$config{b32})
1589         =(0,1,0)                                if $_ eq 'SIXTY_FOUR_BIT';
1590     ($config{b64l},$config{b64},$config{b32})
1591         =(1,0,0)                                if $_ eq 'SIXTY_FOUR_BIT_LONG';
1592     ($config{b64l},$config{b64},$config{b32})
1593         =(0,0,1)                                if $_ eq 'THIRTY_TWO_BIT';
1594 }
1595 die "Exactly one of SIXTY_FOUR_BIT|SIXTY_FOUR_BIT_LONG|THIRTY_TWO_BIT can be set in bn_ops\n"
1596     if $count > 1;
1597
1598 $config{api} = $config{major} * 10000 + $config{minor} * 100
1599     unless $config{api};
1600 foreach (keys %$apitable) {
1601     $disabled{"deprecated-$_"} = "deprecation"
1602         if $disabled{deprecated} && $config{api} >= $apitable->{$_};
1603 }
1604
1605 disable();                      # Run a cascade now
1606
1607 # Hack cflags for better warnings (dev option) #######################
1608
1609 # "Stringify" the C and C++ flags string.  This permits it to be made part of
1610 # a string and works as well on command lines.
1611 $config{cflags} = [ map { (my $x = $_) =~ s/([\\\"])/\\$1/g; $x }
1612                         @{$config{cflags}} ];
1613 $config{cxxflags} = [ map { (my $x = $_) =~ s/([\\\"])/\\$1/g; $x }
1614                           @{$config{cxxflags}} ] if $config{CXX};
1615
1616 $config{openssl_api_defines} = [
1617     "OPENSSL_CONFIGURED_API=".$config{api},
1618 ];
1619
1620 my @strict_warnings_collection=();
1621 if ($strict_warnings)
1622         {
1623         my $wopt;
1624         my $gccver = $predefined_C{__GNUC__} // -1;
1625
1626         if ($gccver >= 4)
1627                 {
1628                 push @strict_warnings_collection, @gcc_devteam_warn;
1629                 push @strict_warnings_collection, @clang_devteam_warn
1630                     if (defined($predefined_C{__clang__}));
1631                 }
1632         elsif ($config{target} =~ /^VC-/)
1633                 {
1634                 push @strict_warnings_collection, @cl_devteam_warn;
1635                 }
1636         else
1637                 {
1638                 warn "WARNING --strict-warnings requires gcc[>=4] or gcc-alike, or MSVC"
1639                 }
1640         }
1641
1642 if (grep { $_ =~ /(?:^|\s)-static(?:\s|$)/ } @{$config{LDFLAGS}}) {
1643     disable('static', 'pic', 'threads');
1644 }
1645
1646 $config{CFLAGS} = [ map { $_ eq '--ossl-strict-warnings'
1647                               ? @strict_warnings_collection
1648                               : ( $_ ) }
1649                     @{$config{CFLAGS}} ];
1650
1651 unless ($disabled{afalgeng}) {
1652     $config{afalgeng}="";
1653     if (grep { $_ eq 'afalgeng' } @{$target{enable}}) {
1654         my $minver = 4*10000 + 1*100 + 0;
1655         if ($config{CROSS_COMPILE} eq "") {
1656             my $verstr = `uname -r`;
1657             my ($ma, $mi1, $mi2) = split("\\.", $verstr);
1658             ($mi2) = $mi2 =~ /(\d+)/;
1659             my $ver = $ma*10000 + $mi1*100 + $mi2;
1660             if ($ver < $minver) {
1661                 disable('too-old-kernel', 'afalgeng');
1662             } else {
1663                 push @{$config{engdirs}}, "afalg";
1664             }
1665         } else {
1666             disable('cross-compiling', 'afalgeng');
1667         }
1668     } else {
1669         disable('not-linux', 'afalgeng');
1670     }
1671 }
1672
1673 unless ($disabled{devcryptoeng}) {
1674     if ($target =~ m/^BSD/) {
1675         my $maxver = 5*100 + 7;
1676         my $sysstr = `uname -s`;
1677         my $verstr = `uname -r`;
1678         $sysstr =~ s|\R$||;
1679         $verstr =~ s|\R$||;
1680         my ($ma, $mi, @rest) = split m|\.|, $verstr;
1681         my $ver = $ma*100 + $mi;
1682         if ($sysstr eq 'OpenBSD' && $ver >= $maxver) {
1683             disable('too-new-kernel', 'devcryptoeng');
1684         }
1685     }
1686 }
1687
1688 unless ($disabled{ktls}) {
1689     $config{ktls}="";
1690     if ($target =~ m/^linux/) {
1691         my $usr = "/usr/$config{cross_compile_prefix}";
1692         chop($usr);
1693         if ($config{cross_compile_prefix} eq "") {
1694             $usr = "/usr";
1695         }
1696         my $minver = (4 << 16) + (13 << 8) + 0;
1697         my @verstr = split(" ",`cat $usr/include/linux/version.h | grep LINUX_VERSION_CODE`);
1698
1699         if ($verstr[2] < $minver) {
1700             disable('too-old-kernel', 'ktls');
1701         }
1702     } elsif ($target =~ m/^BSD/) {
1703         my $cc = $config{CROSS_COMPILE}.$config{CC};
1704         system("printf '#include <sys/types.h>\n#include <sys/ktls.h>' | $cc -E - >/dev/null 2>&1");
1705         if ($? != 0) {
1706             disable('too-old-freebsd', 'ktls');
1707         }
1708     } else {
1709         disable('not-linux-or-freebsd', 'ktls');
1710     }
1711 }
1712
1713 push @{$config{openssl_other_defines}}, "OPENSSL_NO_KTLS" if ($disabled{ktls});
1714
1715 # Get the extra flags used when building shared libraries and modules.  We
1716 # do this late because some of them depend on %disabled.
1717
1718 # Make the flags to build DSOs the same as for shared libraries unless they
1719 # are already defined
1720 $target{module_cflags} = $target{shared_cflag} unless defined $target{module_cflags};
1721 $target{module_cxxflags} = $target{shared_cxxflag} unless defined $target{module_cxxflags};
1722 $target{module_ldflags} = $target{shared_ldflag} unless defined $target{module_ldflags};
1723 {
1724     my $shared_info_pl =
1725         catfile(dirname($0), "Configurations", "shared-info.pl");
1726     my %shared_info = read_eval_file($shared_info_pl);
1727     push @{$target{_conf_fname_int}}, $shared_info_pl;
1728     my $si = $target{shared_target};
1729     while (ref $si ne "HASH") {
1730         last if ! defined $si;
1731         if (ref $si eq "CODE") {
1732             $si = $si->();
1733         } else {
1734             $si = $shared_info{$si};
1735         }
1736     }
1737
1738     # Some of the 'shared_target' values don't have any entries in
1739     # %shared_info.  That's perfectly fine, AS LONG AS the build file
1740     # template knows how to handle this.  That is currently the case for
1741     # Windows and VMS.
1742     if (defined $si) {
1743         # Just as above, copy certain shared_* attributes to the corresponding
1744         # module_ attribute unless the latter is already defined
1745         $si->{module_cflags} = $si->{shared_cflag} unless defined $si->{module_cflags};
1746         $si->{module_cxxflags} = $si->{shared_cxxflag} unless defined $si->{module_cxxflags};
1747         $si->{module_ldflags} = $si->{shared_ldflag} unless defined $si->{module_ldflags};
1748         foreach (sort keys %$si) {
1749             $target{$_} = defined $target{$_}
1750                 ? add($si->{$_})->($target{$_})
1751                 : $si->{$_};
1752         }
1753     }
1754 }
1755
1756 # ALL MODIFICATIONS TO %disabled, %config and %target MUST BE DONE FROM HERE ON
1757
1758 ######################################################################
1759 # Build up information for skipping certain directories depending on disabled
1760 # features, as well as setting up macros for disabled features.
1761
1762 # This is a tentative database of directories to skip.  Some entries may not
1763 # correspond to anything real, but that's ok, they will simply be ignored.
1764 # The actual processing of these entries is done in the build.info lookup
1765 # loop further down.
1766 #
1767 # The key is a Unix formatted path in the source tree, the value is an index
1768 # into %disabled_info, so any existing path gets added to a corresponding
1769 # 'skipped' entry in there with the list of skipped directories.
1770 my %skipdir = ();
1771 my %disabled_info = ();         # For configdata.pm
1772 foreach my $what (sort keys %disabled) {
1773     # There are deprecated disablables that translate to themselves.
1774     # They cause disabling cascades, but should otherwise not regiter.
1775     next if $deprecated_disablables{$what};
1776     # The generated $disabled{"deprecated-x.y"} entries are special
1777     # and treated properly elsewhere
1778     next if $what =~ m|^deprecated-|;
1779
1780     $config{options} .= " no-$what";
1781
1782     if (!grep { $what eq $_ } ( 'buildtest-c++', 'fips', 'threads', 'shared',
1783                                 'module', 'pic', 'dynamic-engine', 'makedepend',
1784                                 'zlib-dynamic', 'zlib', 'sse2', 'legacy' )) {
1785         (my $WHAT = uc $what) =~ s|-|_|g;
1786         my $skipdir = $what;
1787
1788         # fix-up crypto/directory name(s)
1789         $skipdir = "ripemd" if $what eq "rmd160";
1790         $skipdir = "whrlpool" if $what eq "whirlpool";
1791
1792         my $macro = $disabled_info{$what}->{macro} = "OPENSSL_NO_$WHAT";
1793         push @{$config{openssl_feature_defines}}, $macro;
1794
1795         $skipdir{engines} = $what if $what eq 'engine';
1796         $skipdir{"crypto/$skipdir"} = $what
1797             unless $what eq 'async' || $what eq 'err' || $what eq 'dso';
1798     }
1799 }
1800
1801 if ($disabled{"dynamic-engine"}) {
1802     push @{$config{openssl_feature_defines}}, "OPENSSL_NO_DYNAMIC_ENGINE";
1803 } else {
1804     push @{$config{openssl_feature_defines}}, "OPENSSL_NO_STATIC_ENGINE";
1805 }
1806
1807 # If we use the unified build, collect information from build.info files
1808 my %unified_info = ();
1809
1810 my $buildinfo_debug = defined($ENV{CONFIGURE_DEBUG_BUILDINFO});
1811 if ($builder eq "unified") {
1812     use Text::Template 1.46;
1813
1814     sub cleandir {
1815         my $base = shift;
1816         my $dir = shift;
1817         my $relativeto = shift || ".";
1818
1819         $dir = catdir($base,$dir) unless isabsolute($dir);
1820
1821         # Make sure the directories we're building in exists
1822         mkpath($dir);
1823
1824         my $res = abs2rel(absolutedir($dir), rel2abs($relativeto));
1825         #print STDERR "DEBUG[cleandir]: $dir , $base => $res\n";
1826         return $res;
1827     }
1828
1829     sub cleanfile {
1830         my $base = shift;
1831         my $file = shift;
1832         my $relativeto = shift || ".";
1833
1834         $file = catfile($base,$file) unless isabsolute($file);
1835
1836         my $d = dirname($file);
1837         my $f = basename($file);
1838
1839         # Make sure the directories we're building in exists
1840         mkpath($d);
1841
1842         my $res = abs2rel(catfile(absolutedir($d), $f), rel2abs($relativeto));
1843         #print STDERR "DEBUG[cleanfile]: $d , $f => $res\n";
1844         return $res;
1845     }
1846
1847     # Store the name of the template file we will build the build file from
1848     # in %config.  This may be useful for the build file itself.
1849     my @build_file_template_names =
1850         ( $builder_platform."-".$target{build_file}.".tmpl",
1851           $target{build_file}.".tmpl" );
1852     my @build_file_templates = ();
1853
1854     # First, look in the user provided directory, if given
1855     if (defined env($local_config_envname)) {
1856         @build_file_templates =
1857             map {
1858                 if ($^O eq 'VMS') {
1859                     # VMS environment variables are logical names,
1860                     # which can be used as is
1861                     $local_config_envname . ':' . $_;
1862                 } else {
1863                     catfile(env($local_config_envname), $_);
1864                 }
1865             }
1866             @build_file_template_names;
1867     }
1868     # Then, look in our standard directory
1869     push @build_file_templates,
1870         ( map { cleanfile($srcdir, catfile("Configurations", $_), $blddir) }
1871           @build_file_template_names );
1872
1873     my $build_file_template;
1874     for $_ (@build_file_templates) {
1875         $build_file_template = $_;
1876         last if -f $build_file_template;
1877
1878         $build_file_template = undef;
1879     }
1880     if (!defined $build_file_template) {
1881         die "*** Couldn't find any of:\n", join("\n", @build_file_templates), "\n";
1882     }
1883     $config{build_file_templates}
1884       = [ cleanfile($srcdir, catfile("Configurations", "common0.tmpl"),
1885                     $blddir),
1886           $build_file_template,
1887           cleanfile($srcdir, catfile("Configurations", "common.tmpl"),
1888                     $blddir) ];
1889
1890     my @build_dirs = ( [ ] );   # current directory
1891
1892     $config{build_infos} = [ ];
1893
1894     # We want to detect configdata.pm in the source tree, so we
1895     # don't use it if the build tree is different.
1896     my $src_configdata = cleanfile($srcdir, "configdata.pm", $blddir);
1897
1898     # Any source file that we recognise is placed in this hash table, with
1899     # the list of its intended destinations as value.  When everything has
1900     # been collected, there's a routine that checks that these source files
1901     # exist, or if they are generated, that the generator exists.
1902     my %check_exist = ();
1903     my %check_generate = ();
1904
1905     my %ordinals = ();
1906     while (@build_dirs) {
1907         my @curd = @{shift @build_dirs};
1908         my $sourced = catdir($srcdir, @curd);
1909         my $buildd = catdir($blddir, @curd);
1910
1911         my $unixdir = join('/', @curd);
1912         if (exists $skipdir{$unixdir}) {
1913             my $what = $skipdir{$unixdir};
1914             push @{$disabled_info{$what}->{skipped}}, catdir(@curd);
1915             next;
1916         }
1917
1918         mkpath($buildd);
1919
1920         my $f = 'build.info';
1921         # The basic things we're trying to build
1922         my @programs = ();
1923         my @libraries = ();
1924         my @modules = ();
1925         my @scripts = ();
1926
1927         my %sources = ();
1928         my %shared_sources = ();
1929         my %includes = ();
1930         my %defines = ();
1931         my %depends = ();
1932         my %generate = ();
1933         my %htmldocs = ();
1934         my %mandocs = ();
1935
1936         # Support for $variablename in build.info files.
1937         # Embedded perl code is the ultimate master, still.  If its output
1938         # contains a dollar sign, it had better be escaped, or it will be
1939         # taken for a variable name prefix.
1940         my %variables = ();
1941         # Variable name syntax
1942         my $variable_name_re = qr/(?P<VARIABLE>[[:alpha:]][[:alnum:]_]*)/;
1943         # Value modifier syntaxes
1944         my $variable_subst_re = qr/\/(?P<RE>(?:\\\/|.)*?)\/(?P<SUBST>.*?)/;
1945         # Variable reference
1946         my $variable_simple_re = qr/(?<!\\)\$${variable_name_re}/;
1947         my $variable_w_mod_re =
1948             qr/(?<!\\)\$\{${variable_name_re}(?P<MOD>(?:\\\/|.)*?)\}/;
1949         # Tie it all together
1950         my $variable_re = qr/${variable_simple_re}|${variable_w_mod_re}/;
1951
1952         my $expand_variables = sub {
1953             my $value = '';
1954             my $value_rest = shift;
1955
1956             if ($ENV{CONFIGURE_DEBUG_VARIABLE_EXPAND}) {
1957                 print STDERR
1958                     "DEBUG[\$expand_variables] Parsed '$value_rest' ...\n"
1959             }
1960
1961             while ($value_rest =~ /${variable_re}/) {
1962                 # We must save important regexp values, because the next
1963                 # regexp clears them
1964                 my $mod = $+{MOD};
1965                 my $variable_value = $variables{$+{VARIABLE}};
1966
1967                 $value_rest = $';
1968                 $value .= $`;
1969
1970                 # Process modifier expressions, if present
1971                 if (defined $mod) {
1972                     if ($mod =~ /^${variable_subst_re}$/) {
1973                         my $re = $+{RE};
1974                         my $subst = $+{SUBST};
1975
1976                         $variable_value =~ s/\Q$re\E/$subst/g;
1977
1978                         if ($ENV{CONFIGURE_DEBUG_VARIABLE_EXPAND}) {
1979                             print STDERR
1980                                 "DEBUG[\$expand_variables] ... and substituted ",
1981                                 "'$re' with '$subst'\n";
1982                         }
1983                     }
1984                 }
1985
1986                 $value .= $variable_value;
1987             }
1988             if ($ENV{CONFIGURE_DEBUG_VARIABLE_EXPAND}) {
1989                 print STDERR
1990                     "DEBUG[\$expand_variables] ... into: '$value$value_rest'\n";
1991             }
1992             return $value . $value_rest;
1993         };
1994
1995         # Support for attributes in build.info files
1996         my %attributes = ();
1997         my $handle_attributes = sub {
1998             my $attr_str = shift;
1999             my $ref = shift;
2000             my @goals = @_;
2001
2002             return unless defined $attr_str;
2003
2004             my @a = tokenize($attr_str, qr|\s*,\s*|);
2005             foreach my $a (@a) {
2006                 my $ac = 1;
2007                 my $ak = $a;
2008                 my $av = 1;
2009                 if ($a =~ m|^(!)?(.*?)\s* = \s*(.*?)$|x) {
2010                     $ac = ! $1;
2011                     $ak = $2;
2012                     $av = $3;
2013                 }
2014                 foreach my $g (@goals) {
2015                     if ($ac) {
2016                         $$ref->{$g}->{$ak} = $av;
2017                     } else {
2018                         delete $$ref->{$g}->{$ak};
2019                     }
2020                 }
2021             }
2022         };
2023
2024         # Support for pushing values on multiple indexes of a given hash
2025         # array.
2026         my $push_to = sub {
2027             my $valueref = shift;
2028             my $index_str = shift; # May be undef or empty
2029             my $attrref = shift;   # May be undef
2030             my $attr_str = shift;
2031             my @values = @_;
2032
2033             if (defined $index_str) {
2034                 my @indexes = ( '' );
2035                 if ($index_str !~ m|^\s*$|) {
2036                     @indexes = tokenize($index_str);
2037                 }
2038                 foreach (@indexes) {
2039                     push @{$valueref->{$_}}, @values;
2040                     if (defined $attrref) {
2041                         $handle_attributes->($attr_str, \$$attrref->{$_},
2042                                              @values);
2043                     }
2044                 }
2045             } else {
2046                 push @$valueref, @values;
2047                 $handle_attributes->($attr_str, $attrref, @values)
2048                     if defined $attrref;
2049             }
2050         };
2051
2052         if ($buildinfo_debug) {
2053             print STDERR "DEBUG: Reading ",catfile($sourced, $f),"\n";
2054         }
2055         push @{$config{build_infos}}, catfile(abs2rel($sourced, $blddir), $f);
2056         my $template =
2057             Text::Template->new(TYPE => 'FILE',
2058                                 SOURCE => catfile($sourced, $f),
2059                                 PREPEND => qq{use lib "$FindBin::Bin/util/perl";});
2060         die "Something went wrong with $sourced/$f: $!\n" unless $template;
2061         my @text =
2062             split /^/m,
2063             $template->fill_in(HASH => { config => \%config,
2064                                          target => \%target,
2065                                          disabled => \%disabled,
2066                                          withargs => \%withargs,
2067                                          builddir => abs2rel($buildd, $blddir),
2068                                          sourcedir => abs2rel($sourced, $blddir),
2069                                          buildtop => abs2rel($blddir, $blddir),
2070                                          sourcetop => abs2rel($srcdir, $blddir) },
2071                                DELIMITERS => [ "{-", "-}" ]);
2072
2073         # The top item of this stack has the following values
2074         # -2 positive already run and we found ELSE (following ELSIF should fail)
2075         # -1 positive already run (skip until ENDIF)
2076         # 0 negatives so far (if we're at a condition, check it)
2077         # 1 last was positive (don't skip lines until next ELSE, ELSIF or ENDIF)
2078         # 2 positive ELSE (following ELSIF should fail)
2079         my @skip = ();
2080
2081         # A few useful generic regexps
2082         my $index_re = qr/\[\s*(?P<INDEX>(?:\\.|.)*?)\s*\]/;
2083         my $cond_re = qr/\[\s*(?P<COND>(?:\\.|.)*?)\s*\]/;
2084         my $attribs_re = qr/(?:\{\s*(?P<ATTRIBS>(?:\\.|.)*?)\s*\})?/;
2085         my $value_re = qr/\s*(?P<VALUE>.*?)\s*/;
2086         collect_information(
2087             collect_from_array([ @text ],
2088                                qr/\\$/ => sub { my $l1 = shift; my $l2 = shift;
2089                                                 $l1 =~ s/\\$//; $l1.$l2 }),
2090             # Info we're looking for
2091             qr/^\s* IF ${cond_re} \s*$/x
2092             => sub {
2093                 if (! @skip || $skip[$#skip] > 0) {
2094                     push @skip, !! $expand_variables->($+{COND});
2095                 } else {
2096                     push @skip, -1;
2097                 }
2098             },
2099             qr/^\s* ELSIF ${cond_re} \s*$/x
2100             => sub { die "ELSIF out of scope" if ! @skip;
2101                      die "ELSIF following ELSE" if abs($skip[$#skip]) == 2;
2102                      $skip[$#skip] = -1 if $skip[$#skip] != 0;
2103                      $skip[$#skip] = !! $expand_variables->($+{COND})
2104                          if $skip[$#skip] == 0; },
2105             qr/^\s* ELSE \s*$/x
2106             => sub { die "ELSE out of scope" if ! @skip;
2107                      $skip[$#skip] = -2 if $skip[$#skip] != 0;
2108                      $skip[$#skip] = 2 if $skip[$#skip] == 0; },
2109             qr/^\s* ENDIF \s*$/x
2110             => sub { die "ENDIF out of scope" if ! @skip;
2111                      pop @skip; },
2112             qr/^\s* ${variable_re} \s* = ${value_re} $/x
2113             => sub {
2114                 if (!@skip || $skip[$#skip] > 0) {
2115                     $variables{$+{VARIABLE}} = $expand_variables->($+{VALUE});
2116                 }
2117             },
2118             qr/^\s* SUBDIRS \s* = ${value_re} $/x
2119             => sub {
2120                 if (!@skip || $skip[$#skip] > 0) {
2121                     foreach (tokenize($expand_variables->($+{VALUE}))) {
2122                         push @build_dirs, [ @curd, splitdir($_, 1) ];
2123                     }
2124                 }
2125             },
2126             qr/^\s* PROGRAMS ${attribs_re} \s* =  ${value_re} $/x
2127             => sub { $push_to->(\@programs, undef,
2128                                 \$attributes{programs}, $+{ATTRIBS},
2129                                 tokenize($expand_variables->($+{VALUE})))
2130                          if !@skip || $skip[$#skip] > 0; },
2131             qr/^\s* LIBS ${attribs_re} \s* =  ${value_re} $/x
2132             => sub { $push_to->(\@libraries, undef,
2133                                 \$attributes{libraries}, $+{ATTRIBS},
2134                                 tokenize($expand_variables->($+{VALUE})))
2135                          if !@skip || $skip[$#skip] > 0; },
2136             qr/^\s* MODULES ${attribs_re} \s* =  ${value_re} $/x
2137             => sub { $push_to->(\@modules, undef,
2138                                 \$attributes{modules}, $+{ATTRIBS},
2139                                 tokenize($expand_variables->($+{VALUE})))
2140                          if !@skip || $skip[$#skip] > 0; },
2141             qr/^\s* SCRIPTS ${attribs_re} \s* =  ${value_re} $/x
2142             => sub { $push_to->(\@scripts, undef,
2143                                 \$attributes{scripts}, $+{ATTRIBS},
2144                                 tokenize($expand_variables->($+{VALUE})))
2145                          if !@skip || $skip[$#skip] > 0; },
2146             qr/^\s* HTMLDOCS ${index_re} = ${value_re} $/x
2147             => sub { $push_to->(\%htmldocs, $expand_variables->($+{INDEX}),
2148                                 undef, undef,
2149                                 tokenize($expand_variables->($+{VALUE})))
2150                          if !@skip || $skip[$#skip] > 0; },
2151             qr/^\s* MANDOCS ${index_re} = ${value_re} $/x
2152             => sub { $push_to->(\%mandocs, $expand_variables->($+{INDEX}),
2153                                 undef, undef,
2154                                 tokenize($expand_variables->($+{VALUE})))
2155                          if !@skip || $skip[$#skip] > 0; },
2156             qr/^\s* SOURCE ${index_re} = ${value_re} $/x
2157             => sub { $push_to->(\%sources, $expand_variables->($+{INDEX}),
2158                                 undef, undef,
2159                                 tokenize($expand_variables->($+{VALUE})))
2160                          if !@skip || $skip[$#skip] > 0; },
2161             qr/^\s* SHARED_SOURCE ${index_re} = ${value_re} $/x
2162             => sub { $push_to->(\%shared_sources, $expand_variables->($+{INDEX}),
2163                                 undef, undef,
2164                                 tokenize($expand_variables->($+{VALUE})))
2165                          if !@skip || $skip[$#skip] > 0; },
2166             qr/^\s* INCLUDE ${index_re} = ${value_re} $/x
2167             => sub { $push_to->(\%includes, $expand_variables->($+{INDEX}),
2168                                 undef, undef,
2169                                 tokenize($expand_variables->($+{VALUE})))
2170                          if !@skip || $skip[$#skip] > 0; },
2171             qr/^\s* DEFINE ${index_re} = ${value_re} $/x
2172             => sub { $push_to->(\%defines, $expand_variables->($+{INDEX}),
2173                                 undef, undef,
2174                                 tokenize($expand_variables->($+{VALUE})))
2175                          if !@skip || $skip[$#skip] > 0; },
2176             qr/^\s* DEPEND ${index_re} ${attribs_re} = ${value_re} $/x
2177             => sub { $push_to->(\%depends, $expand_variables->($+{INDEX}),
2178                                 \$attributes{depends}, $+{ATTRIBS},
2179                                 tokenize($expand_variables->($+{VALUE})))
2180                          if !@skip || $skip[$#skip] > 0; },
2181             qr/^\s* GENERATE ${index_re} = ${value_re} $/x
2182             => sub { $push_to->(\%generate, $expand_variables->($+{INDEX}),
2183                                 undef, undef, $+{VALUE})
2184                          if !@skip || $skip[$#skip] > 0; },
2185             qr/^\s* (?:\#.*)? $/x => sub { },
2186             "OTHERWISE" => sub { die "Something wrong with this line:\n$_\nat $sourced/$f" },
2187             "BEFORE" => sub {
2188                 if ($buildinfo_debug) {
2189                     print STDERR "DEBUG: Parsing ",join(" ", @_),"\n";
2190                     print STDERR "DEBUG: ... before parsing, skip stack is ",join(" ", map { int($_) } @skip),"\n";
2191                 }
2192             },
2193             "AFTER" => sub {
2194                 if ($buildinfo_debug) {
2195                     print STDERR "DEBUG: .... after parsing, skip stack is ",join(" ", map { int($_) } @skip),"\n";
2196                 }
2197             },
2198             );
2199         die "runaway IF?" if (@skip);
2200
2201         if (grep { defined $attributes{modules}->{$_}->{engine} } keys %attributes
2202                 and !$config{dynamic_engines}) {
2203             die <<"EOF"
2204 ENGINES can only be used if configured with 'dynamic-engine'.
2205 This is usually a fault in a build.info file.
2206 EOF
2207         }
2208
2209         {
2210             my %infos = ( programs  => [ @programs  ],
2211                           libraries => [ @libraries ],
2212                           modules   => [ @modules   ],
2213                           scripts   => [ @scripts   ] );
2214             foreach my $k (keys %infos) {
2215                 foreach (@{$infos{$k}}) {
2216                     my $item = cleanfile($buildd, $_, $blddir);
2217                     $unified_info{$k}->{$item} = 1;
2218
2219                     # Fix up associated attributes
2220                     $unified_info{attributes}->{$k}->{$item} =
2221                         $attributes{$k}->{$_}
2222                         if defined $attributes{$k}->{$_};
2223                 }
2224             }
2225         }
2226
2227         # Check that we haven't defined any library as both shared and
2228         # explicitly static.  That is forbidden.
2229         my @doubles = ();
2230         foreach (grep /\.a$/, keys %{$unified_info{libraries}}) {
2231             (my $l = $_) =~ s/\.a$//;
2232             push @doubles, $l if defined $unified_info{libraries}->{$l};
2233         }
2234         die "these libraries are both explicitly static and shared:\n  ",
2235             join(" ", @doubles), "\n"
2236             if @doubles;
2237
2238         foreach (keys %sources) {
2239             my $dest = $_;
2240             my $ddest = cleanfile($buildd, $_, $blddir);
2241             foreach (@{$sources{$dest}}) {
2242                 my $s = cleanfile($sourced, $_, $blddir);
2243
2244                 # If it's generated or we simply don't find it in the source
2245                 # tree, we assume it's in the build tree.
2246                 if ($s eq $src_configdata || $generate{$_} || ! -f $s) {
2247                     $s = cleanfile($buildd, $_, $blddir);
2248                 }
2249                 # We recognise C++, C and asm files
2250                 if ($s =~ /\.(cc|cpp|c|s|S)$/) {
2251                     push @{$check_exist{$s}}, $ddest;
2252                     my $o = $_;
2253                     $o =~ s/\.[csS]$/.o/; # C and assembler
2254                     $o =~ s/\.(cc|cpp)$/_cc.o/; # C++
2255                     $o = cleanfile($buildd, $o, $blddir);
2256                     $unified_info{sources}->{$ddest}->{$o} = -1;
2257                     $unified_info{sources}->{$o}->{$s} = -1;
2258                 } elsif ($s =~ /\.rc$/) {
2259                     # We also recognise resource files
2260                     push @{$check_exist{$s}}, $ddest;
2261                     my $o = $_;
2262                     $o =~ s/\.rc$/.res/; # Resource configuration
2263                     $o = cleanfile($buildd, $o, $blddir);
2264                     $unified_info{sources}->{$ddest}->{$o} = -1;
2265                     $unified_info{sources}->{$o}->{$s} = -1;
2266                 } else {
2267                     push @{$check_exist{$s}}, $ddest;
2268                     $unified_info{sources}->{$ddest}->{$s} = 1;
2269                 }
2270             }
2271         }
2272
2273         foreach (keys %shared_sources) {
2274             my $dest = $_;
2275             my $ddest = cleanfile($buildd, $_, $blddir);
2276             foreach (@{$shared_sources{$dest}}) {
2277                 my $s = cleanfile($sourced, $_, $blddir);
2278
2279                 # If it's generated or we simply don't find it in the source
2280                 # tree, we assume it's in the build tree.
2281                 if ($s eq $src_configdata || $generate{$_} || ! -f $s) {
2282                     $s = cleanfile($buildd, $_, $blddir);
2283                 }
2284
2285                 if ($s =~ /\.(cc|cpp|c|s|S)$/) {
2286                     # We recognise C++, C and asm files
2287                     push @{$check_exist{$s}}, $ddest;
2288                     my $o = $_;
2289                     $o =~ s/\.[csS]$/.o/; # C and assembler
2290                     $o =~ s/\.(cc|cpp)$/_cc.o/; # C++
2291                     $o = cleanfile($buildd, $o, $blddir);
2292                     $unified_info{shared_sources}->{$ddest}->{$o} = -1;
2293                     $unified_info{sources}->{$o}->{$s} = -1;
2294                 } elsif ($s =~ /\.rc$/) {
2295                     # We also recognise resource files
2296                     push @{$check_exist{$s}}, $ddest;
2297                     my $o = $_;
2298                     $o =~ s/\.rc$/.res/; # Resource configuration
2299                     $o = cleanfile($buildd, $o, $blddir);
2300                     $unified_info{shared_sources}->{$ddest}->{$o} = -1;
2301                     $unified_info{sources}->{$o}->{$s} = -1;
2302                 } elsif ($s =~ /\.ld$/) {
2303                     # We also recognise linker scripts (or corresponding)
2304                     # We know they are generated files
2305                     push @{$check_exist{$s}}, $ddest;
2306                     my $ld = cleanfile($buildd, $_, $blddir);
2307                     $unified_info{shared_sources}->{$ddest}->{$ld} = 1;
2308                 } else {
2309                     die "unrecognised source file type for shared library: $s\n";
2310                 }
2311             }
2312         }
2313
2314         foreach (keys %generate) {
2315             my $dest = $_;
2316             my $ddest = cleanfile($buildd, $_, $blddir);
2317             die "more than one generator for $dest: "
2318                 ,join(" ", @{$generate{$_}}),"\n"
2319                 if scalar @{$generate{$_}} > 1;
2320             my @generator = split /\s+/, $generate{$dest}->[0];
2321             my $gen = $generator[0];
2322             $generator[0] = cleanfile($sourced, $gen, $blddir);
2323
2324             # If the generator is itself generated, it's in the build tree
2325             if ($generate{$gen}) {
2326                 $generator[0] = cleanfile($buildd, $gen, $blddir);
2327             }
2328             $check_generate{$ddest}->{$generator[0]}++;
2329
2330             $unified_info{generate}->{$ddest} = [ @generator ];
2331         }
2332
2333         foreach (keys %depends) {
2334             my $dest = $_;
2335             my $ddest = $dest eq "" ? "" : cleanfile($sourced, $_, $blddir);
2336
2337             # If the destination doesn't exist in source, it can only be
2338             # a generated file in the build tree.
2339             if ($ddest ne "" && ($ddest eq $src_configdata || ! -f $ddest)) {
2340                 $ddest = cleanfile($buildd, $_, $blddir);
2341             }
2342             foreach (@{$depends{$dest}}) {
2343                 my $d = cleanfile($sourced, $_, $blddir);
2344
2345                 # If we know it's generated, or assume it is because we can't
2346                 # find it in the source tree, we set file we depend on to be
2347                 # in the build tree rather than the source tree.
2348                 if ($d eq $src_configdata
2349                     || (grep { $d eq $_ }
2350                         map { cleanfile($srcdir, $_, $blddir) }
2351                         grep { /\.h$/ } keys %{$unified_info{generate}})
2352                     || ! -f $d) {
2353                     $d = cleanfile($buildd, $_, $blddir);
2354                 }
2355                 $unified_info{depends}->{$ddest}->{$d} = 1;
2356
2357                 # Fix up associated attributes
2358                 $unified_info{attributes}->{depends}->{$ddest}->{$d} =
2359                     $attributes{depends}->{$dest}->{$_}
2360                     if defined $attributes{depends}->{$dest}->{$_};
2361             }
2362         }
2363
2364         foreach (keys %includes) {
2365             my $dest = $_;
2366             my $ddest = cleanfile($sourced, $_, $blddir);
2367
2368             # If the destination doesn't exist in source, it can only be
2369             # a generated file in the build tree.
2370             if ($ddest eq $src_configdata || ! -f $ddest) {
2371                 $ddest = cleanfile($buildd, $_, $blddir);
2372             }
2373             foreach (@{$includes{$dest}}) {
2374                 my $is = cleandir($sourced, $_, $blddir);
2375                 my $ib = cleandir($buildd, $_, $blddir);
2376                 push @{$unified_info{includes}->{$ddest}->{source}}, $is
2377                     unless grep { $_ eq $is } @{$unified_info{includes}->{$ddest}->{source}};
2378                 push @{$unified_info{includes}->{$ddest}->{build}}, $ib
2379                     unless grep { $_ eq $ib } @{$unified_info{includes}->{$ddest}->{build}};
2380             }
2381         }
2382
2383         foreach my $dest (keys %defines) {
2384             my $ddest;
2385
2386             if ($dest ne "") {
2387                 $ddest = cleanfile($sourced, $dest, $blddir);
2388
2389                 # If the destination doesn't exist in source, it can only
2390                 # be a generated file in the build tree.
2391                 if (! -f $ddest) {
2392                     $ddest = cleanfile($buildd, $dest, $blddir);
2393                 }
2394             }
2395             foreach my $v (@{$defines{$dest}}) {
2396                 $v =~ m|^([^=]*)(=.*)?$|;
2397                 die "0 length macro name not permitted\n" if $1 eq "";
2398                 if ($dest ne "") {
2399                     die "$1 defined more than once\n"
2400                         if defined $unified_info{defines}->{$ddest}->{$1};
2401                     $unified_info{defines}->{$ddest}->{$1} = $2;
2402                 } else {
2403                     die "$1 defined more than once\n"
2404                         if grep { $v eq $_ } @{$config{defines}};
2405                     push @{$config{defines}}, $v;
2406                 }
2407             }
2408         }
2409
2410         foreach my $section (keys %htmldocs) {
2411             foreach (@{$htmldocs{$section}}) {
2412                 my $htmldocs = cleanfile($buildd, $_, $blddir);
2413                 $unified_info{htmldocs}->{$section}->{$htmldocs} = 1;
2414             }
2415         }
2416
2417         foreach my $section (keys %mandocs) {
2418             foreach (@{$mandocs{$section}}) {
2419                 my $mandocs = cleanfile($buildd, $_, $blddir);
2420                 $unified_info{mandocs}->{$section}->{$mandocs} = 1;
2421             }
2422         }
2423     }
2424
2425     my $ordinals_text = join(', ', sort keys %ordinals);
2426     warn <<"EOF" if $ordinals_text;
2427
2428 WARNING: ORDINALS were specified for $ordinals_text
2429 They are ignored and should be replaced with a combination of GENERATE,
2430 DEPEND and SHARED_SOURCE.
2431 EOF
2432
2433     # Check that each generated file is only generated once
2434     my $ambiguous_generation = 0;
2435     foreach (sort keys %check_generate) {
2436         my @generators = sort keys %{$check_generate{$_}};
2437         my $generators_txt = join(', ', @generators);
2438         if (scalar @generators > 1) {
2439             warn "$_ is GENERATEd by more than one generator ($generators_txt)\n";
2440             $ambiguous_generation++;
2441         }
2442         if ($check_generate{$_}->{$generators[0]} > 1) {
2443             warn "INFO: $_ has more than one GENERATE declaration (same generator)\n"
2444         }
2445     }
2446     die "There are ambiguous source file generations\n"
2447         if $ambiguous_generation > 0;
2448
2449     # All given source files should exist, or if generated, their
2450     # generator should exist.  This loop ensures this is true.
2451     my $missing = 0;
2452     foreach my $orig (sort keys %check_exist) {
2453         foreach my $dest (@{$check_exist{$orig}}) {
2454             if ($orig ne $src_configdata) {
2455                 if ($orig =~ /\.a$/) {
2456                     # Static library names may be used as sources, so we
2457                     # need to detect those and give them special treatment.
2458                     unless (grep { $_ eq $orig }
2459                             keys %{$unified_info{libraries}}) {
2460                         warn "$orig is given as source for $dest, but no such library is built\n";
2461                         $missing++;
2462                     }
2463                 } else {
2464                     # A source may be generated, and its generator may be
2465                     # generated as well.  We therefore loop to dig out the
2466                     # first generator.
2467                     my $gen = $orig;
2468
2469                     while (my @next = keys %{$check_generate{$gen}}) {
2470                         $gen = $next[0];
2471                     }
2472
2473                     if (! -f $gen) {
2474                         if ($gen ne $orig) {
2475                             $missing++;
2476                             warn "$orig is given as source for $dest, but its generator (leading to $gen) is missing\n";
2477                         } else {
2478                             $missing++;
2479                             warn "$orig is given as source for $dest, but is missing\n";
2480                         }
2481                     }
2482                 }
2483             }
2484         }
2485     }
2486     die "There are files missing\n" if $missing > 0;
2487
2488     # Go through the sources of all libraries and check that the same basename
2489     # doesn't appear more than once.  Some static library archivers depend on
2490     # them being unique.
2491     {
2492         my $err = 0;
2493         foreach my $prod (keys %{$unified_info{libraries}}) {
2494             my @prod_sources =
2495                 map { keys %{$unified_info{sources}->{$_}} }
2496                 keys %{$unified_info{sources}->{$prod}};
2497             my %srccnt = ();
2498
2499             # Count how many times a given each source basename
2500             # appears for each product.
2501             foreach my $src (@prod_sources) {
2502                 $srccnt{basename $src}++;
2503             }
2504
2505             foreach my $src (keys %srccnt) {
2506                 if ((my $cnt = $srccnt{$src}) > 1) {
2507                     print STDERR "$src appears $cnt times for the product $prod\n";
2508                     $err++
2509                 }
2510             }
2511         }
2512         die if $err > 0;
2513     }
2514
2515     # Massage the result
2516
2517     # If we depend on a header file or a perl module, add an inclusion of
2518     # its directory to allow smoothe inclusion
2519     foreach my $dest (keys %{$unified_info{depends}}) {
2520         next if $dest eq "";
2521         foreach my $d (keys %{$unified_info{depends}->{$dest}}) {
2522             next unless $d =~ /\.(h|pm)$/;
2523             my $i = dirname($d);
2524             my $spot =
2525                 $d eq "configdata.pm" || defined($unified_info{generate}->{$d})
2526                 ? 'build' : 'source';
2527             push @{$unified_info{includes}->{$dest}->{$spot}}, $i
2528                 unless grep { $_ eq $i } @{$unified_info{includes}->{$dest}->{$spot}};
2529         }
2530     }
2531
2532     # Go through all intermediary files and change their names to something that
2533     # reflects what they will be built for.  Note that for some source files,
2534     # this leads to duplicate object files because they are used multiple times.
2535     # the goal is to rename all object files according to this scheme:
2536     #    {productname}-{midfix}-{origobjname}.[o|res]
2537     # the {midfix} is a keyword indicating the type of product, which is mostly
2538     # valuable for libraries since they come in two forms.
2539     #
2540     # This also reorganises the {sources} and {shared_sources} so that the
2541     # former only contains ALL object files that are supposed to end up in
2542     # static libraries and programs, while the latter contains ALL object files
2543     # that are supposed to end up in shared libraries and DSOs.
2544     # The main reason for having two different source structures is to allow
2545     # the same name to be used for the static and the shared variants of a
2546     # library.
2547     {
2548         # Take copies so we don't get interference from added stuff
2549         my %unified_copy = ();
2550         foreach (('sources', 'shared_sources')) {
2551             $unified_copy{$_} = { %{$unified_info{$_}} }
2552                 if defined($unified_info{$_});
2553             delete $unified_info{$_};
2554         }
2555         foreach my $prodtype (('programs', 'libraries', 'modules', 'scripts')) {
2556             # $intent serves multi purposes:
2557             # - give a prefix for the new object files names
2558             # - in the case of libraries, rearrange the object files so static
2559             #   libraries use the 'sources' structure exclusively, while shared
2560             #   libraries use the 'shared_sources' structure exclusively.
2561             my $intent = {
2562                 programs  => { bin    => { src => [ 'sources' ],
2563                                            dst => 'sources' } },
2564                 libraries => { lib    => { src => [ 'sources' ],
2565                                            dst => 'sources' },
2566                                shlib  => { prodselect =>
2567                                                sub { grep !/\.a$/, @_ },
2568                                            src => [ 'sources',
2569                                                     'shared_sources' ],
2570                                            dst => 'shared_sources' } },
2571                 modules   => { dso    => { src => [ 'sources' ],
2572                                            dst => 'sources' } },
2573                 scripts   => { script => { src => [ 'sources' ],
2574                                            dst => 'sources' } }
2575                } -> {$prodtype};
2576             foreach my $kind (keys %$intent) {
2577                 next if ($intent->{$kind}->{dst} eq 'shared_sources'
2578                              && $disabled{shared});
2579
2580                 my @src = @{$intent->{$kind}->{src}};
2581                 my $dst = $intent->{$kind}->{dst};
2582                 my $prodselect = $intent->{$kind}->{prodselect} // sub { @_ };
2583                 foreach my $prod ($prodselect->(keys %{$unified_info{$prodtype}})) {
2584                     # %prod_sources has all applicable objects as keys, and
2585                     # their corresponding sources as values
2586                     my %prod_sources =
2587                         map { $_ => [ keys %{$unified_copy{sources}->{$_}} ] }
2588                         map { keys %{$unified_copy{$_}->{$prod}} }
2589                         @src;
2590                     foreach (keys %prod_sources) {
2591                         # Only affect object files and resource files,
2592                         # the others simply get a new value
2593                         # (+1 instead of -1)
2594                         if ($_ =~ /\.(o|res)$/) {
2595                             (my $prodname = $prod) =~ s|\.a$||;
2596                             my $newobj =
2597                                 catfile(dirname($_),
2598                                         basename($prodname)
2599                                             . '-' . $kind
2600                                             . '-' . basename($_));
2601                             $unified_info{$dst}->{$prod}->{$newobj} = 1;
2602                             foreach my $src (@{$prod_sources{$_}}) {
2603                                 $unified_info{sources}->{$newobj}->{$src} = 1;
2604                             }
2605                             # Adjust dependencies
2606                             foreach my $deps (keys %{$unified_info{depends}->{$_}}) {
2607                                 $unified_info{depends}->{$_}->{$deps} = -1;
2608                                 $unified_info{depends}->{$newobj}->{$deps} = 1;
2609                             }
2610                             # Adjust includes
2611                             foreach my $k (('source', 'build')) {
2612                                 next unless
2613                                     defined($unified_info{includes}->{$_}->{$k});
2614                                 my @incs = @{$unified_info{includes}->{$_}->{$k}};
2615                                 $unified_info{includes}->{$newobj}->{$k} = [ @incs ];
2616                             }
2617                         } else {
2618                             $unified_info{$dst}->{$prod}->{$_} = 1;
2619                         }
2620                     }
2621                 }
2622             }
2623         }
2624     }
2625
2626     # At this point, we have a number of sources with the value -1.  They
2627     # aren't part of the local build and are probably meant for a different
2628     # platform, and can therefore be cleaned away.  That happens when making
2629     # %unified_info more efficient below.
2630
2631     ### Make unified_info a bit more efficient
2632     # One level structures
2633     foreach (("programs", "libraries", "modules", "scripts")) {
2634         $unified_info{$_} = [ sort keys %{$unified_info{$_}} ];
2635     }
2636     # Two level structures
2637     foreach my $l1 (("sources", "shared_sources", "ldadd", "depends",
2638                      "htmldocs", "mandocs")) {
2639         foreach my $l2 (sort keys %{$unified_info{$l1}}) {
2640             my @items =
2641                 sort
2642                 grep { $unified_info{$l1}->{$l2}->{$_} > 0 }
2643                 keys %{$unified_info{$l1}->{$l2}};
2644             if (@items) {
2645                 $unified_info{$l1}->{$l2} = [ @items ];
2646             } else {
2647                 delete $unified_info{$l1}->{$l2};
2648             }
2649         }
2650     }
2651     # Defines
2652     foreach my $dest (sort keys %{$unified_info{defines}}) {
2653         $unified_info{defines}->{$dest}
2654             = [ map { $_.$unified_info{defines}->{$dest}->{$_} }
2655                 sort keys %{$unified_info{defines}->{$dest}} ];
2656     }
2657     # Includes
2658     foreach my $dest (sort keys %{$unified_info{includes}}) {
2659         if (defined($unified_info{includes}->{$dest}->{build})) {
2660             my @source_includes = ();
2661             @source_includes = ( @{$unified_info{includes}->{$dest}->{source}} )
2662                 if defined($unified_info{includes}->{$dest}->{source});
2663             $unified_info{includes}->{$dest} =
2664                 [ @{$unified_info{includes}->{$dest}->{build}} ];
2665             foreach my $inc (@source_includes) {
2666                 push @{$unified_info{includes}->{$dest}}, $inc
2667                     unless grep { $_ eq $inc } @{$unified_info{includes}->{$dest}};
2668             }
2669         } elsif (defined($unified_info{includes}->{$dest}->{source})) {
2670             $unified_info{includes}->{$dest} =
2671                 [ @{$unified_info{includes}->{$dest}->{source}} ];
2672         } else {
2673             delete $unified_info{includes}->{$dest};
2674         }
2675     }
2676
2677     # For convenience collect information regarding directories where
2678     # files are generated, those generated files and the end product
2679     # they end up in where applicable.  Then, add build rules for those
2680     # directories
2681     my %loopinfo = ( "lib" => [ @{$unified_info{libraries}} ],
2682                      "dso" => [ @{$unified_info{modules}} ],
2683                      "bin" => [ @{$unified_info{programs}} ],
2684                      "script" => [ @{$unified_info{scripts}} ],
2685                      "docs" => [ (map { @{$unified_info{htmldocs}->{$_} // []} }
2686                                   keys %{$unified_info{htmldocs} // {}}),
2687                                  (map { @{$unified_info{mandocs}->{$_} // []} }
2688                                   keys %{$unified_info{mandocs} // {}}) ] );
2689     foreach my $type (keys %loopinfo) {
2690         foreach my $product (@{$loopinfo{$type}}) {
2691             my %dirs = ();
2692             my $pd = dirname($product);
2693
2694             foreach (@{$unified_info{sources}->{$product} // []},
2695                      @{$unified_info{shared_sources}->{$product} // []}) {
2696                 my $d = dirname($_);
2697
2698                 # We don't want to create targets for source directories
2699                 # when building out of source
2700                 next if ($config{sourcedir} ne $config{builddir}
2701                              && $d =~ m|^\Q$config{sourcedir}\E|);
2702                 # We already have a "test" target, and the current directory
2703                 # is just silly to make a target for
2704                 next if $d eq "test" || $d eq ".";
2705
2706                 $dirs{$d} = 1;
2707                 push @{$unified_info{dirinfo}->{$d}->{deps}}, $_
2708                     if $d ne $pd;
2709             }
2710             foreach (keys %dirs) {
2711                 push @{$unified_info{dirinfo}->{$_}->{products}->{$type}},
2712                     $product;
2713             }
2714         }
2715     }
2716 }
2717
2718 # For the schemes that need it, we provide the old *_obj configs
2719 # from the *_asm_obj ones
2720 foreach (grep /_(asm|aux)_src$/, keys %target) {
2721     my $src = $_;
2722     (my $obj = $_) =~ s/_(asm|aux)_src$/_obj/;
2723     $target{$obj} = $target{$src};
2724     $target{$obj} =~ s/\.[csS]\b/.o/g; # C and assembler
2725     $target{$obj} =~ s/\.(cc|cpp)\b/_cc.o/g; # C++
2726 }
2727
2728 # Write down our configuration where it fits #########################
2729
2730 my %template_vars = (
2731     config => \%config,
2732     target => \%target,
2733     disablables => \@disablables,
2734     disablables_int => \@disablables_int,
2735     disabled => \%disabled,
2736     withargs => \%withargs,
2737     unified_info => \%unified_info,
2738     tls => \@tls,
2739     dtls => \@dtls,
2740     makevars => [ sort keys %user ],
2741     disabled_info => \%disabled_info,
2742     user_crossable => \@user_crossable,
2743 );
2744 my $configdata_outname = 'configdata.pm';
2745 print "Creating $configdata_outname\n";
2746 open CONFIGDATA, ">$configdata_outname.new"
2747             or die "Trying to create $configdata_outname.new: $!";
2748 my $configdata_tmplname = cleanfile($srcdir, "configdata.pm.in", $blddir);
2749 my $configdata_tmpl =
2750     OpenSSL::Template->new(TYPE => 'FILE', SOURCE => $configdata_tmplname);
2751 $configdata_tmpl->fill_in(
2752     FILENAME => $configdata_tmplname,
2753     OUTPUT => \*CONFIGDATA,
2754     HASH => { %template_vars,
2755               autowarntext => [
2756                   'WARNING: do not edit!',
2757                   "Generated by Configure from $configdata_tmplname",
2758               ] }
2759 ) or die $Text::Template::ERROR;
2760 close CONFIGDATA;
2761 rename "$configdata_outname.new", $configdata_outname;
2762 if ($builder_platform eq 'unix') {
2763     my $mode = (0755 & ~umask);
2764     chmod $mode, 'configdata.pm'
2765         or warn sprintf("WARNING: Couldn't change mode for 'configdata.pm' to 0%03o: %s\n",$mode,$!);
2766 }
2767
2768 print "Running $configdata_outname\n";
2769 my $perlcmd = (quotify("maybeshell", $config{PERL}))[0];
2770 my $cmd = "$perlcmd $configdata_outname";
2771 #print STDERR "DEBUG[run_dofile]: \$cmd = $cmd\n";
2772 system($cmd);
2773 exit 1 if $? != 0;
2774
2775 $SIG{__DIE__} = $orig_death_handler;
2776
2777 print <<"EOF" if ($disabled{threads} eq "unavailable");
2778
2779 The library could not be configured for supporting multi-threaded
2780 applications as the compiler options required on this system are not known.
2781 See file INSTALL.md for details if you need multi-threading.
2782 EOF
2783
2784 print <<"EOF" if ($no_shared_warn);
2785
2786 The options 'shared', 'pic' and 'dynamic-engine' aren't supported on this
2787 platform, so we will pretend you gave the option 'no-pic', which also disables
2788 'shared' and 'dynamic-engine'.  If you know how to implement shared libraries
2789 or position independent code, please let us know (but please first make sure
2790 you have tried with a current version of OpenSSL).
2791 EOF
2792
2793 print <<"EOF";
2794
2795 **********************************************************************
2796 ***                                                                ***
2797 ***   OpenSSL has been successfully configured                     ***
2798 ***                                                                ***
2799 ***   If you encounter a problem while building, please open an    ***
2800 ***   issue on GitHub <https://github.com/openssl/openssl/issues>  ***
2801 ***   and include the output from the following command:           ***
2802 ***                                                                ***
2803 ***       perl configdata.pm --dump                                ***
2804 ***                                                                ***
2805 ***   (If you are new to OpenSSL, you might want to consult the    ***
2806 ***   'Troubleshooting' section in the INSTALL.md file first)      ***
2807 ***                                                                ***
2808 **********************************************************************
2809 EOF
2810
2811 exit(0);
2812
2813 ######################################################################
2814 #
2815 # Helpers and utility functions
2816 #
2817
2818 # Death handler, to print a helpful message in case of failure #######
2819 #
2820 sub death_handler {
2821     die @_ if $^S;              # To prevent the added message in eval blocks
2822     my $build_file = $target{build_file} // "build file";
2823     my @message = ( <<"_____", @_ );
2824
2825 Failure!  $build_file wasn't produced.
2826 Please read INSTALL.md and associated NOTES-* files.  You may also have to
2827 look over your available compiler tool chain or change your configuration.
2828
2829 _____
2830
2831     # Dying is terminal, so it's ok to reset the signal handler here.
2832     $SIG{__DIE__} = $orig_death_handler;
2833     die @message;
2834 }
2835
2836 # Configuration file reading #########################################
2837
2838 # Note: All of the helper functions are for lazy evaluation.  They all
2839 # return a CODE ref, which will return the intended value when evaluated.
2840 # Thus, whenever there's mention of a returned value, it's about that
2841 # intended value.
2842
2843 # Helper function to implement conditional value variants, with a default
2844 # plus additional values based on the value of $config{build_type}.
2845 # Arguments are given in hash table form:
2846 #
2847 #       picker(default => "Basic string: ",
2848 #              debug   => "debug",
2849 #              release => "release")
2850 #
2851 # When configuring with --debug, the resulting string will be
2852 # "Basic string: debug", and when not, it will be "Basic string: release"
2853 #
2854 # This can be used to create variants of sets of flags according to the
2855 # build type:
2856 #
2857 #       cflags => picker(default => "-Wall",
2858 #                        debug   => "-g -O0",
2859 #                        release => "-O3")
2860 #
2861 sub picker {
2862     my %opts = @_;
2863     return sub { add($opts{default} || (),
2864                      $opts{$config{build_type}} || ())->(); }
2865 }
2866
2867 # Helper function to combine several values of different types into one.
2868 # This is useful if you want to combine a string with the result of a
2869 # lazy function, such as:
2870 #
2871 #       cflags => combine("-Wall", sub { $disabled{zlib} ? () : "-DZLIB" })
2872 #
2873 sub combine {
2874     my @stuff = @_;
2875     return sub { add(@stuff)->(); }
2876 }
2877
2878 # Helper function to implement conditional values depending on the value
2879 # of $disabled{threads}.  Can be used as follows:
2880 #
2881 #       cflags => combine("-Wall", threads("-pthread"))
2882 #
2883 sub threads {
2884     my @flags = @_;
2885     return sub { add($disabled{threads} ? () : @flags)->(); }
2886 }
2887
2888 sub shared {
2889     my @flags = @_;
2890     return sub { add($disabled{shared} ? () : @flags)->(); }
2891 }
2892
2893 our $add_called = 0;
2894 # Helper function to implement adding values to already existing configuration
2895 # values.  It handles elements that are ARRAYs, CODEs and scalars
2896 sub _add {
2897     my $separator = shift;
2898
2899     # If there's any ARRAY in the collection of values OR the separator
2900     # is undef, we will return an ARRAY of combined values, otherwise a
2901     # string of joined values with $separator as the separator.
2902     my $found_array = !defined($separator);
2903
2904     my @values =
2905         map {
2906             my $res = $_;
2907             while (ref($res) eq "CODE") {
2908                 $res = $res->();
2909             }
2910             if (defined($res)) {
2911                 if (ref($res) eq "ARRAY") {
2912                     $found_array = 1;
2913                     @$res;
2914                 } else {
2915                     $res;
2916                 }
2917             } else {
2918                 ();
2919             }
2920     } (@_);
2921
2922     $add_called = 1;
2923
2924     if ($found_array) {
2925         [ @values ];
2926     } else {
2927         join($separator, grep { defined($_) && $_ ne "" } @values);
2928     }
2929 }
2930 sub add_before {
2931     my $separator = " ";
2932     if (ref($_[$#_]) eq "HASH") {
2933         my $opts = pop;
2934         $separator = $opts->{separator};
2935     }
2936     my @x = @_;
2937     sub { _add($separator, @x, @_) };
2938 }
2939 sub add {
2940     my $separator = " ";
2941     if (ref($_[$#_]) eq "HASH") {
2942         my $opts = pop;
2943         $separator = $opts->{separator};
2944     }
2945     my @x = @_;
2946     sub { _add($separator, @_, @x) };
2947 }
2948
2949 sub read_eval_file {
2950     my $fname = shift;
2951     my $content;
2952     my @result;
2953
2954     open F, "< $fname" or die "Can't open '$fname': $!\n";
2955     {
2956         undef local $/;
2957         $content = <F>;
2958     }
2959     close F;
2960     {
2961         local $@;
2962
2963         @result = ( eval $content );
2964         warn $@ if $@;
2965     }
2966     return wantarray ? @result : $result[0];
2967 }
2968
2969 # configuration reader, evaluates the input file as a perl script and expects
2970 # it to fill %targets with target configurations.  Those are then added to
2971 # %table.
2972 sub read_config {
2973     my $fname = shift;
2974     my %targets;
2975
2976     {
2977         # Protect certain tables from tampering
2978         local %table = ();
2979
2980         %targets = read_eval_file($fname);
2981     }
2982     my %preexisting = ();
2983     foreach (sort keys %targets) {
2984         $preexisting{$_} = 1 if $table{$_};
2985     }
2986     die <<"EOF",
2987 The following config targets from $fname
2988 shadow pre-existing config targets with the same name:
2989 EOF
2990         map { "  $_\n" } sort keys %preexisting
2991         if %preexisting;
2992
2993
2994     # For each target, check that it's configured with a hash table.
2995     foreach (keys %targets) {
2996         if (ref($targets{$_}) ne "HASH") {
2997             if (ref($targets{$_}) eq "") {
2998                 warn "Deprecated target configuration for $_, ignoring...\n";
2999             } else {
3000                 warn "Misconfigured target configuration for $_ (should be a hash table), ignoring...\n";
3001             }
3002             delete $targets{$_};
3003         } else {
3004             $targets{$_}->{_conf_fname_int} = add([ $fname ]);
3005         }
3006     }
3007
3008     %table = (%table, %targets);
3009
3010 }
3011
3012 # configuration resolver.  Will only resolve all the lazy evaluation
3013 # codeblocks for the chosen target and all those it inherits from,
3014 # recursively
3015 sub resolve_config {
3016     my $target = shift;
3017     my @breadcrumbs = @_;
3018
3019 #    my $extra_checks = defined($ENV{CONFIGURE_EXTRA_CHECKS});
3020
3021     if (grep { $_ eq $target } @breadcrumbs) {
3022         die "inherit_from loop!  target backtrace:\n  "
3023             ,$target,"\n  ",join("\n  ", @breadcrumbs),"\n";
3024     }
3025
3026     if (!defined($table{$target})) {
3027         warn "Warning! target $target doesn't exist!\n";
3028         return ();
3029     }
3030     # Recurse through all inheritances.  They will be resolved on the
3031     # fly, so when this operation is done, they will all just be a
3032     # bunch of attributes with string values.
3033     # What we get here, though, are keys with references to lists of
3034     # the combined values of them all.  We will deal with lists after
3035     # this stage is done.
3036     my %combined_inheritance = ();
3037     if ($table{$target}->{inherit_from}) {
3038         my @inherit_from =
3039             map { ref($_) eq "CODE" ? $_->() : $_ } @{$table{$target}->{inherit_from}};
3040         foreach (@inherit_from) {
3041             my %inherited_config = resolve_config($_, $target, @breadcrumbs);
3042
3043             # 'template' is a marker that's considered private to
3044             # the config that had it.
3045             delete $inherited_config{template};
3046
3047             foreach (keys %inherited_config) {
3048                 if (!$combined_inheritance{$_}) {
3049                     $combined_inheritance{$_} = [];
3050                 }
3051                 push @{$combined_inheritance{$_}}, $inherited_config{$_};
3052             }
3053         }
3054     }
3055
3056     # We won't need inherit_from in this target any more, since we've
3057     # resolved all the inheritances that lead to this
3058     delete $table{$target}->{inherit_from};
3059
3060     # Now is the time to deal with those lists.  Here's the place to
3061     # decide what shall be done with those lists, all based on the
3062     # values of the target we're currently dealing with.
3063     # - If a value is a coderef, it will be executed with the list of
3064     #   inherited values as arguments.
3065     # - If the corresponding key doesn't have a value at all or is the
3066     #   empty string, the inherited value list will be run through the
3067     #   default combiner (below), and the result becomes this target's
3068     #   value.
3069     # - Otherwise, this target's value is assumed to be a string that
3070     #   will simply override the inherited list of values.
3071     my $default_combiner = add();
3072
3073     my %all_keys =
3074         map { $_ => 1 } (keys %combined_inheritance,
3075                          keys %{$table{$target}});
3076
3077     sub process_values {
3078         my $object    = shift;
3079         my $inherited = shift;  # Always a [ list ]
3080         my $target    = shift;
3081         my $entry     = shift;
3082
3083         $add_called = 0;
3084
3085         while(ref($object) eq "CODE") {
3086             $object = $object->(@$inherited);
3087         }
3088         if (!defined($object)) {
3089             return ();
3090         }
3091         elsif (ref($object) eq "ARRAY") {
3092             local $add_called;  # To make sure recursive calls don't affect it
3093             return [ map { process_values($_, $inherited, $target, $entry) }
3094                      @$object ];
3095         } elsif (ref($object) eq "") {
3096             return $object;
3097         } else {
3098             die "cannot handle reference type ",ref($object)
3099                 ," found in target ",$target," -> ",$entry,"\n";
3100         }
3101     }
3102
3103     foreach (sort keys %all_keys) {
3104         my $previous = $combined_inheritance{$_};
3105
3106         # Current target doesn't have a value for the current key?
3107         # Assign it the default combiner, the rest of this loop body
3108         # will handle it just like any other coderef.
3109         if (!exists $table{$target}->{$_}) {
3110             $table{$target}->{$_} = $default_combiner;
3111         }
3112
3113         $table{$target}->{$_} = process_values($table{$target}->{$_},
3114                                                $combined_inheritance{$_},
3115                                                $target, $_);
3116         unless(defined($table{$target}->{$_})) {
3117             delete $table{$target}->{$_};
3118         }
3119 #        if ($extra_checks &&
3120 #            $previous && !($add_called ||  $previous ~~ $table{$target}->{$_})) {
3121 #            warn "$_ got replaced in $target\n";
3122 #        }
3123     }
3124
3125     # Finally done, return the result.
3126     return %{$table{$target}};
3127 }
3128
3129 sub usage
3130         {
3131         print STDERR $usage;
3132         print STDERR "\npick os/compiler from:\n";
3133         my $j=0;
3134         my $i;
3135         my $k=0;
3136         foreach $i (sort keys %table)
3137                 {
3138                 next if $table{$i}->{template};
3139                 next if $i =~ /^debug/;
3140                 $k += length($i) + 1;
3141                 if ($k > 78)
3142                         {
3143                         print STDERR "\n";
3144                         $k=length($i);
3145                         }
3146                 print STDERR $i . " ";
3147                 }
3148         foreach $i (sort keys %table)
3149                 {
3150                 next if $table{$i}->{template};
3151                 next if $i !~ /^debug/;
3152                 $k += length($i) + 1;
3153                 if ($k > 78)
3154                         {
3155                         print STDERR "\n";
3156                         $k=length($i);
3157                         }
3158                 print STDERR $i . " ";
3159                 }
3160         exit(1);
3161         }
3162
3163 sub compiler_predefined {
3164     state %predefined;
3165     my $cc = shift;
3166
3167     return () if $^O eq 'VMS';
3168
3169     die 'compiler_predefined called without a compiler command'
3170         unless $cc;
3171
3172     if (! $predefined{$cc}) {
3173
3174         $predefined{$cc} = {};
3175
3176         # collect compiler pre-defines from gcc or gcc-alike...
3177         open(PIPE, "$cc -dM -E -x c /dev/null 2>&1 |");
3178         while (my $l = <PIPE>) {
3179             $l =~ m/^#define\s+(\w+(?:\(\w+\))?)(?:\s+(.+))?/ or last;
3180             $predefined{$cc}->{$1} = $2 // '';
3181         }
3182         close(PIPE);
3183     }
3184
3185     return %{$predefined{$cc}};
3186 }
3187
3188 sub which
3189 {
3190     my ($name)=@_;
3191
3192     if (eval { require IPC::Cmd; 1; }) {
3193         IPC::Cmd->import();
3194         return scalar IPC::Cmd::can_run($name);
3195     } else {
3196         # if there is $directories component in splitpath,
3197         # then it's not something to test with $PATH...
3198         return $name if (File::Spec->splitpath($name))[1];
3199
3200         foreach (File::Spec->path()) {
3201             my $fullpath = catfile($_, "$name$target{exe_extension}");
3202             if (-f $fullpath and -x $fullpath) {
3203                 return $fullpath;
3204             }
3205         }
3206     }
3207 }
3208
3209 sub env
3210 {
3211     my $name = shift;
3212     my %opts = @_;
3213
3214     unless ($opts{cacheonly}) {
3215         # Note that if $ENV{$name} doesn't exist or is undefined,
3216         # $config{perlenv}->{$name} will be created with the value
3217         # undef.  This is intentional.
3218
3219         $config{perlenv}->{$name} = $ENV{$name}
3220             if ! exists $config{perlenv}->{$name};
3221     }
3222     return $config{perlenv}->{$name};
3223 }
3224
3225 # Configuration printer ##############################################
3226
3227 sub print_table_entry
3228 {
3229     local $now_printing = shift;
3230     my %target = resolve_config($now_printing);
3231     my $type = shift;
3232
3233     # Don't print the templates
3234     return if $target{template};
3235
3236     my @sequence = (
3237         "sys_id",
3238         "cpp",
3239         "cppflags",
3240         "defines",
3241         "includes",
3242         "cc",
3243         "cflags",
3244         "ld",
3245         "lflags",
3246         "loutflag",
3247         "ex_libs",
3248         "bn_ops",
3249         "enable",
3250         "disable",
3251         "poly1035_asm_src",
3252         "thread_scheme",
3253         "perlasm_scheme",
3254         "dso_scheme",
3255         "shared_target",
3256         "shared_cflag",
3257         "shared_defines",
3258         "shared_ldflag",
3259         "shared_rcflag",
3260         "shared_extension",
3261         "dso_extension",
3262         "obj_extension",
3263         "exe_extension",
3264         "ranlib",
3265         "ar",
3266         "arflags",
3267         "aroutflag",
3268         "rc",
3269         "rcflags",
3270         "rcoutflag",
3271         "mt",
3272         "mtflags",
3273         "mtinflag",
3274         "mtoutflag",
3275         "multilib",
3276         "build_scheme",
3277         );
3278
3279     if ($type eq "TABLE") {
3280         print "\n";
3281         print "*** $now_printing\n";
3282         foreach (@sequence) {
3283             if (ref($target{$_}) eq "ARRAY") {
3284                 printf "\$%-12s = %s\n", $_, join(" ", @{$target{$_}});
3285             } else {
3286                 printf "\$%-12s = %s\n", $_, $target{$_};
3287             }
3288         }
3289     } elsif ($type eq "HASH") {
3290         my $largest =
3291             length((sort { length($a) <=> length($b) } @sequence)[-1]);
3292         print "    '$now_printing' => {\n";
3293         foreach (@sequence) {
3294             if ($target{$_}) {
3295                 if (ref($target{$_}) eq "ARRAY") {
3296                     print "      '",$_,"'"," " x ($largest - length($_))," => [ ",join(", ", map { "'$_'" } @{$target{$_}})," ],\n";
3297                 } else {
3298                     print "      '",$_,"'"," " x ($largest - length($_))," => '",$target{$_},"',\n";
3299                 }
3300             }
3301         }
3302         print "    },\n";
3303     }
3304 }
3305
3306 # Utility routines ###################################################
3307
3308 # On VMS, if the given file is a logical name, File::Spec::Functions
3309 # will consider it an absolute path.  There are cases when we want a
3310 # purely syntactic check without checking the environment.
3311 sub isabsolute {
3312     my $file = shift;
3313
3314     # On non-platforms, we just use file_name_is_absolute().
3315     return file_name_is_absolute($file) unless $^O eq "VMS";
3316
3317     # If the file spec includes a device or a directory spec,
3318     # file_name_is_absolute() is perfectly safe.
3319     return file_name_is_absolute($file) if $file =~ m|[:\[]|;
3320
3321     # Here, we know the given file spec isn't absolute
3322     return 0;
3323 }
3324
3325 # Makes a directory absolute and cleans out /../ in paths like foo/../bar
3326 # On some platforms, this uses rel2abs(), while on others, realpath() is used.
3327 # realpath() requires that at least all path components except the last is an
3328 # existing directory.  On VMS, the last component of the directory spec must
3329 # exist.
3330 sub absolutedir {
3331     my $dir = shift;
3332
3333     # realpath() is quite buggy on VMS.  It uses LIB$FID_TO_NAME, which
3334     # will return the volume name for the device, no matter what.  Also,
3335     # it will return an incorrect directory spec if the argument is a
3336     # directory that doesn't exist.
3337     if ($^O eq "VMS") {
3338         return rel2abs($dir);
3339     }
3340
3341     # We use realpath() on Unix, since no other will properly clean out
3342     # a directory spec.
3343     use Cwd qw/realpath/;
3344
3345     return realpath($dir);
3346 }
3347
3348 # Check if all paths are one and the same, using stat.  They must both exist
3349 # We need this for the cases when File::Spec doesn't detect case insensitivity
3350 # (File::Spec::Unix assumes case sensitivity)
3351 sub samedir {
3352     die "samedir expects two arguments\n" unless scalar @_ == 2;
3353
3354     my @stat0 = stat($_[0]);    # First argument
3355     my @stat1 = stat($_[1]);    # Second argument
3356
3357     die "Couldn't stat $_[0]" unless @stat0;
3358     die "Couldn't stat $_[1]" unless @stat1;
3359
3360     # Compare device number
3361     return 0 unless ($stat0[0] == $stat1[0]);
3362     # Compare "inode".  The perl manual recommends comparing as
3363     # string rather than as number.
3364     return 0 unless ($stat0[1] eq $stat1[1]);
3365
3366     return 1;                   # All the same
3367 }
3368
3369 sub quotify {
3370     my %processors = (
3371         perl    => sub { my $x = shift;
3372                          $x =~ s/([\\\$\@"])/\\$1/g;
3373                          return '"'.$x.'"'; },
3374         maybeshell => sub { my $x = shift;
3375                             (my $y = $x) =~ s/([\\\"])/\\$1/g;
3376                             if ($x ne $y || $x =~ m|\s|) {
3377                                 return '"'.$y.'"';
3378                             } else {
3379                                 return $x;
3380                             }
3381                         },
3382         );
3383     my $for = shift;
3384     my $processor =
3385         defined($processors{$for}) ? $processors{$for} : sub { shift; };
3386
3387     return map { $processor->($_); } @_;
3388 }
3389
3390 # collect_from_file($filename, $line_concat_cond_re, $line_concat)
3391 # $filename is a file name to read from
3392 # $line_concat_cond_re is a regexp detecting a line continuation ending
3393 # $line_concat is a CODEref that takes care of concatenating two lines
3394 sub collect_from_file {
3395     my $filename = shift;
3396     my $line_concat_cond_re = shift;
3397     my $line_concat = shift;
3398
3399     open my $fh, $filename || die "unable to read $filename: $!\n";
3400     return sub {
3401         my $saved_line = "";
3402         $_ = "";
3403         while (<$fh>) {
3404             s|\R$||;
3405             if (defined $line_concat) {
3406                 $_ = $line_concat->($saved_line, $_);
3407                 $saved_line = "";
3408             }
3409             if (defined $line_concat_cond_re && /$line_concat_cond_re/) {
3410                 $saved_line = $_;
3411                 next;
3412             }
3413             return $_;
3414         }
3415         die "$filename ending with continuation line\n" if $_;
3416         close $fh;
3417         return undef;
3418     }
3419 }
3420
3421 # collect_from_array($array, $line_concat_cond_re, $line_concat)
3422 # $array is an ARRAYref of lines
3423 # $line_concat_cond_re is a regexp detecting a line continuation ending
3424 # $line_concat is a CODEref that takes care of concatenating two lines
3425 sub collect_from_array {
3426     my $array = shift;
3427     my $line_concat_cond_re = shift;
3428     my $line_concat = shift;
3429     my @array = (@$array);
3430
3431     return sub {
3432         my $saved_line = "";
3433         $_ = "";
3434         while (defined($_ = shift @array)) {
3435             s|\R$||;
3436             if (defined $line_concat) {
3437                 $_ = $line_concat->($saved_line, $_);
3438                 $saved_line = "";
3439             }
3440             if (defined $line_concat_cond_re && /$line_concat_cond_re/) {
3441                 $saved_line = $_;
3442                 next;
3443             }
3444             return $_;
3445         }
3446         die "input text ending with continuation line\n" if $_;
3447         return undef;
3448     }
3449 }
3450
3451 # collect_information($lineiterator, $line_continue, $regexp => $CODEref, ...)
3452 # $lineiterator is a CODEref that delivers one line at a time.
3453 # All following arguments are regex/CODEref pairs, where the regexp detects a
3454 # line and the CODEref does something with the result of the regexp.
3455 sub collect_information {
3456     my $lineiterator = shift;
3457     my %collectors = @_;
3458
3459     while(defined($_ = $lineiterator->())) {
3460         s|\R$||;
3461         my $found = 0;
3462         if ($collectors{"BEFORE"}) {
3463             $collectors{"BEFORE"}->($_);
3464         }
3465         foreach my $re (keys %collectors) {
3466             if ($re !~ /^OTHERWISE|BEFORE|AFTER$/ && /$re/) {
3467                 $collectors{$re}->($lineiterator);
3468                 $found = 1;
3469             };
3470         }
3471         if ($collectors{"OTHERWISE"}) {
3472             $collectors{"OTHERWISE"}->($lineiterator, $_)
3473                 unless $found || !defined $collectors{"OTHERWISE"};
3474         }
3475         if ($collectors{"AFTER"}) {
3476             $collectors{"AFTER"}->($_);
3477         }
3478     }
3479 }
3480
3481 # tokenize($line)
3482 # tokenize($line,$separator)
3483 # $line is a line of text to split up into tokens
3484 # $separator [optional] is a regular expression that separates the tokens,
3485 # the default being spaces.  Do not use quotes of any kind as separators,
3486 # that will give undefined results.
3487 # Returns a list of tokens.
3488 #
3489 # Tokens are divided by separator (spaces by default).  If the tokens include
3490 # the separators, they have to be quoted with single or double quotes.
3491 # Double quotes inside a double quoted token must be escaped.  Escaping is done
3492 # with backslash.
3493 # Basically, the same quoting rules apply for " and ' as in any
3494 # Unix shell.
3495 sub tokenize {
3496     my $line = my $debug_line = shift;
3497     my $separator = shift // qr|\s+|;
3498     my @result = ();
3499
3500     if ($ENV{CONFIGURE_DEBUG_TOKENIZE}) {
3501         print STDERR "DEBUG[tokenize]: \$separator = $separator\n";
3502     }
3503
3504     while ($line =~ s|^${separator}||, $line ne "") {
3505         my $token = "";
3506     again:
3507         $line =~ m/^(.*?)(${separator}|"|'|$)/;
3508         $token .= $1;
3509         $line = $2.$';
3510
3511         if ($line =~ m/^"((?:[^"\\]+|\\.)*)"/) {
3512             $token .= $1;
3513             $line = $';
3514             goto again;
3515         } elsif ($line =~ m/^'([^']*)'/) {
3516             $token .= $1;
3517             $line = $';
3518             goto again;
3519         }
3520         push @result, $token;
3521     }
3522
3523     if ($ENV{CONFIGURE_DEBUG_TOKENIZE}) {
3524         print STDERR "DEBUG[tokenize]: Parsed '$debug_line' into:\n";
3525         print STDERR "DEBUG[tokenize]: ('", join("', '", @result), "')\n";
3526     }
3527     return @result;
3528 }