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