Configure

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