aclocal.m4 71.5 KB
Newer Older
1 2 3 4
# Extra autoconf macros for the Glasgow fptools
#
# To be a good autoconf citizen, names of local macros have prefixed with FP_ to
# ensure we don't clash with any pre-supplied autoconf ones.
sof's avatar
sof committed
5

6

7 8 9 10 11 12 13 14 15 16
AC_DEFUN([GHC_SELECT_FILE_EXTENSIONS],
[
    $2=''
    $3='.so'
    case $1 in
    *-unknown-cygwin32)
        AC_MSG_WARN([GHC does not support the Cygwin target at the moment])
        AC_MSG_WARN([I'm assuming you wanted to build for i386-unknown-mingw32])
        exit 1
        ;;
17 18
    # examples: i386-unknown-mingw32, i686-w64-mingw32, x86_64-w64-mingw32
    *-mingw32)
19 20 21 22
        windows=YES
        $2='.exe'
        $3='.dll'
        ;;
23 24
    # apple platform uses .dylib (macOS, iOS, ...)
    *-apple-*)
25 26 27 28 29
        $3='.dylib'
        ;;
    esac
])

30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61
# FPTOOLS_SET_PLATFORM_VARS
# ----------------------------------
# Set the platform variables
AC_DEFUN([FPTOOLS_SET_PLATFORM_VARS],
[
    # If no argument was given for a configuration variable, then discard
    # the guessed canonical system and use the configuration of the
    # bootstrapping ghc. If an argument was given, map it from gnu format
    # to ghc format.
    #
    # For why we do it this way, see: #3637, #1717, #2951
    #
    # In bindists, we haven't called AC_CANONICAL_{BUILD,HOST,TARGET}
    # so this justs uses $bootstrap_target.

    if test "$build_alias" = ""
    then
        if test "$bootstrap_target" != ""
        then
            build=$bootstrap_target
            echo "Build platform inferred as: $build"
        else
            echo "Can't work out build platform"
            exit 1
        fi

        BuildArch=`echo "$build" | sed 's/-.*//'`
        BuildVendor=`echo "$build" | sed -e 's/.*-\(.*\)-.*/\1/'`
        BuildOS=`echo "$build" | sed 's/.*-//'`
    else
        GHC_CONVERT_CPU([$build_cpu], [BuildArch])
        GHC_CONVERT_VENDOR([$build_vendor], [BuildVendor])
62
        GHC_CONVERT_OS([$build_os], [$BuildArch], [BuildOS])
63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81
    fi

    if test "$host_alias" = ""
    then
        if test "$bootstrap_target" != ""
        then
            host=$bootstrap_target
            echo "Host platform inferred as: $host"
        else
            echo "Can't work out host platform"
            exit 1
        fi

        HostArch=`echo "$host" | sed 's/-.*//'`
        HostVendor=`echo "$host" | sed -e 's/.*-\(.*\)-.*/\1/'`
        HostOS=`echo "$host" | sed 's/.*-//'`
    else
        GHC_CONVERT_CPU([$host_cpu], [HostArch])
        GHC_CONVERT_VENDOR([$host_vendor], [HostVendor])
82
        GHC_CONVERT_OS([$host_os], [$HostArch], [HostOS])
83 84 85 86
    fi

    if test "$target_alias" = ""
    then
Simon Marlow's avatar
Simon Marlow committed
87
        if test "$host_alias" != ""
88
        then
Simon Marlow's avatar
Simon Marlow committed
89 90
            GHC_CONVERT_CPU([$host_cpu], [TargetArch])
            GHC_CONVERT_VENDOR([$host_vendor], [TargetVendor])
91
            GHC_CONVERT_OS([$host_os], [$TargetArch],[TargetOS])
92
        else
Simon Marlow's avatar
Simon Marlow committed
93 94 95 96 97 98 99 100
            if test "$bootstrap_target" != ""
            then
                target=$bootstrap_target
                echo "Target platform inferred as: $target"
            else
                echo "Can't work out target platform"
                exit 1
            fi
101

Simon Marlow's avatar
Simon Marlow committed
102 103 104
            TargetArch=`echo "$target" | sed 's/-.*//'`
            TargetVendor=`echo "$target" | sed -e 's/.*-\(.*\)-.*/\1/'`
            TargetOS=`echo "$target" | sed 's/.*-//'`
105 106 107 108
        fi
    else
        GHC_CONVERT_CPU([$target_cpu], [TargetArch])
        GHC_CONVERT_VENDOR([$target_vendor], [TargetVendor])
109
        GHC_CONVERT_OS([$target_os], [$TargetArch], [TargetOS])
110
    fi
111

112 113
    GHC_SELECT_FILE_EXTENSIONS([$host], [exeext_host], [soext_host])
    GHC_SELECT_FILE_EXTENSIONS([$target], [exeext_target], [soext_target])
114 115 116 117 118 119
    windows=NO
    case $host in
    *-unknown-mingw32)
        windows=YES
        ;;
    esac
120

121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138
    BuildPlatform="$BuildArch-$BuildVendor-$BuildOS"
    BuildPlatform_CPP=`echo "$BuildPlatform" | sed -e 's/\./_/g' -e 's/-/_/g'`
    BuildArch_CPP=`    echo "$BuildArch"     | sed -e 's/\./_/g' -e 's/-/_/g'`
    BuildVendor_CPP=`  echo "$BuildVendor"   | sed -e 's/\./_/g' -e 's/-/_/g'`
    BuildOS_CPP=`      echo "$BuildOS"       | sed -e 's/\./_/g' -e 's/-/_/g'`

    HostPlatform="$HostArch-$HostVendor-$HostOS"
    HostPlatform_CPP=`echo "$HostPlatform" | sed -e 's/\./_/g' -e 's/-/_/g'`
    HostArch_CPP=`    echo "$HostArch"     | sed -e 's/\./_/g' -e 's/-/_/g'`
    HostVendor_CPP=`  echo "$HostVendor"   | sed -e 's/\./_/g' -e 's/-/_/g'`
    HostOS_CPP=`      echo "$HostOS"       | sed -e 's/\./_/g' -e 's/-/_/g'`

    TargetPlatform="$TargetArch-$TargetVendor-$TargetOS"
    TargetPlatform_CPP=`echo "$TargetPlatform" | sed -e 's/\./_/g' -e 's/-/_/g'`
    TargetArch_CPP=`    echo "$TargetArch"     | sed -e 's/\./_/g' -e 's/-/_/g'`
    TargetVendor_CPP=`  echo "$TargetVendor"   | sed -e 's/\./_/g' -e 's/-/_/g'`
    TargetOS_CPP=`      echo "$TargetOS"       | sed -e 's/\./_/g' -e 's/-/_/g'`

139 140 141
    # we intend to pass trough --targets to llvm as is.
    LLVMTarget_CPP=`    echo "$target"`

142 143 144
    echo "GHC build  : $BuildPlatform"
    echo "GHC host   : $HostPlatform"
    echo "GHC target : $TargetPlatform"
145
    echo "LLVM target: $target"
146 147 148 149 150 151 152 153 154 155 156 157 158 159 160

    AC_SUBST(BuildPlatform)
    AC_SUBST(HostPlatform)
    AC_SUBST(TargetPlatform)
    AC_SUBST(HostPlatform_CPP)
    AC_SUBST(BuildPlatform_CPP)
    AC_SUBST(TargetPlatform_CPP)

    AC_SUBST(HostArch_CPP)
    AC_SUBST(BuildArch_CPP)
    AC_SUBST(TargetArch_CPP)

    AC_SUBST(HostOS_CPP)
    AC_SUBST(BuildOS_CPP)
    AC_SUBST(TargetOS_CPP)
161
    AC_SUBST(LLVMTarget_CPP)
162 163 164 165 166

    AC_SUBST(HostVendor_CPP)
    AC_SUBST(BuildVendor_CPP)
    AC_SUBST(TargetVendor_CPP)

167 168 169 170
    AC_SUBST(exeext_host)
    AC_SUBST(exeext_target)
    AC_SUBST(soext_host)
    AC_SUBST(soext_target)
171 172 173 174 175 176 177 178
])


# FPTOOLS_SET_HASKELL_PLATFORM_VARS
# ----------------------------------
# Set the Haskell platform variables
AC_DEFUN([FPTOOLS_SET_HASKELL_PLATFORM_VARS],
[
179 180
    checkArch() {
        case [$]1 in
181 182 183
        i386)
            test -z "[$]2" || eval "[$]2=ArchX86"
            ;;
184
        x86_64|amd64)
185 186 187 188 189 190
            test -z "[$]2" || eval "[$]2=ArchX86_64"
            ;;
        powerpc)
            test -z "[$]2" || eval "[$]2=ArchPPC"
            ;;
        powerpc64)
191 192 193 194
            test -z "[$]2" || eval "[$]2=\"ArchPPC_64 {ppc_64ABI = ELF_V1}\""
            ;;
        powerpc64le)
            test -z "[$]2" || eval "[$]2=\"ArchPPC_64 {ppc_64ABI = ELF_V2}\""
195 196 197 198
            ;;
        sparc)
            test -z "[$]2" || eval "[$]2=ArchSPARC"
            ;;
199 200 201
        sparc64)
            test -z "[$]2" || eval "[$]2=ArchSPARC64"
            ;;
202 203
        arm)
            GET_ARM_ISA()
204
            test -z "[$]2" || eval "[$]2=\"ArchARM {armISA = \$ARM_ISA, armISAExt = \$ARM_ISA_EXT, armABI = \$ARM_ABI}\""
205
            ;;
Colin Watson's avatar
Colin Watson committed
206 207 208
        aarch64)
            test -z "[$]2" || eval "[$]2=ArchARM64"
            ;;
209 210 211 212 213 214 215 216 217
        alpha)
            test -z "[$]2" || eval "[$]2=ArchAlpha"
            ;;
        mips|mipseb)
            test -z "[$]2" || eval "[$]2=ArchMipseb"
            ;;
        mipsel)
            test -z "[$]2" || eval "[$]2=ArchMipsel"
            ;;
218
        hppa|hppa1_1|ia64|m68k|rs6000|s390|s390x|sh4|vax)
219
            test -z "[$]2" || eval "[$]2=ArchUnknown"
220 221 222 223 224 225 226 227 228 229
            ;;
        *)
            echo "Unknown arch [$]1"
            exit 1
            ;;
        esac
    }

    checkVendor() {
        case [$]1 in
230
        dec|none|unknown|hp|apple|next|sun|sgi|ibm|montavista|portbld)
231 232
            ;;
        *)
233
            AC_MSG_WARN([Unknown vendor [$]1])
234 235 236 237 238 239
            ;;
        esac
    }

    checkOS() {
        case [$]1 in
240 241 242
        linux)
            test -z "[$]2" || eval "[$]2=OSLinux"
            ;;
243 244 245
        ios)
            test -z "[$]2" || eval "[$]2=OSiOS"
            ;;
246 247 248 249 250 251 252 253 254 255 256 257
        darwin)
            test -z "[$]2" || eval "[$]2=OSDarwin"
            ;;
        solaris2)
            test -z "[$]2" || eval "[$]2=OSSolaris2"
            ;;
        mingw32)
            test -z "[$]2" || eval "[$]2=OSMinGW32"
            ;;
        freebsd)
            test -z "[$]2" || eval "[$]2=OSFreeBSD"
            ;;
258 259 260
        dragonfly)
            test -z "[$]2" || eval "[$]2=OSDragonFly"
            ;;
261 262 263
        kfreebsdgnu)
            test -z "[$]2" || eval "[$]2=OSKFreeBSD"
            ;;
264 265 266
        openbsd)
            test -z "[$]2" || eval "[$]2=OSOpenBSD"
            ;;
Ian Lynagh's avatar
Ian Lynagh committed
267 268 269
        netbsd)
            test -z "[$]2" || eval "[$]2=OSNetBSD"
            ;;
pcapriotti's avatar
pcapriotti committed
270 271 272
        haiku)
            test -z "[$]2" || eval "[$]2=OSHaiku"
            ;;
273 274 275
        nto-qnx)
            test -z "[$]2" || eval "[$]2=OSQNXNTO"
            ;;
276
        dragonfly|hpux|linuxaout|freebsd2|gnu|nextstep2|nextstep3|sunos4|ultrix)
277
            test -z "[$]2" || eval "[$]2=OSUnknown"
278
            ;;
279 280 281
        aix)
            test -z "[$]2" || eval "[$]2=OSAIX"
            ;;
282 283 284
        linux-android)
            test -z "[$]2" || eval "[$]2=OSAndroid"
            ;;
285 286 287 288 289
        *)
            echo "Unknown OS '[$]1'"
            exit 1
            ;;
        esac
290
    }
291

292 293 294 295 296 297 298 299 300 301 302 303 304 305
    dnl ** check for Apple-style dead-stripping support
    dnl    (.subsections-via-symbols assembler directive)

    AC_MSG_CHECKING(for .subsections_via_symbols)
    AC_COMPILE_IFELSE(
        [AC_LANG_PROGRAM([], [__asm__ (".subsections_via_symbols");])],
        [AC_MSG_RESULT(yes)
         HaskellHaveSubsectionsViaSymbols=True
         AC_DEFINE([HAVE_SUBSECTIONS_VIA_SYMBOLS],[1],
                   [Define to 1 if Apple-style dead-stripping is supported.])
        ],
        [HaskellHaveSubsectionsViaSymbols=False
         AC_MSG_RESULT(no)])

306 307 308 309 310 311 312 313 314 315
    dnl ** check for .ident assembler directive

    AC_MSG_CHECKING(whether your assembler supports .ident directive)
    AC_COMPILE_IFELSE(
        [AC_LANG_SOURCE([__asm__ (".ident \"GHC x.y.z\"");])],
        [AC_MSG_RESULT(yes)
         HaskellHaveIdentDirective=True],
        [AC_MSG_RESULT(no)
         HaskellHaveIdentDirective=False])

316 317 318 319 320 321 322 323
    dnl *** check for GNU non-executable stack note support (ELF only)
    dnl     (.section .note.GNU-stack,"",@progbits)

    dnl This test doesn't work with "gcc -g" in gcc 4.4 (GHC trac #3889:
    dnl     Error: can't resolve `.note.GNU-stack' {.note.GNU-stack section} - `.Ltext0' {.text section}
    dnl so we empty CFLAGS while running this test
    CFLAGS2="$CFLAGS"
    CFLAGS=
324 325 326 327 328 329 330 331 332
    case $TargetArch in
      arm)
        dnl See #13937.
        progbits="%progbits"
        ;;
      *)
        progbits="@progbits"
        ;;
    esac
333 334
    AC_MSG_CHECKING(for GNU non-executable stack support)
    AC_COMPILE_IFELSE(
335
        [AC_LANG_PROGRAM([__asm__ (".section .note.GNU-stack,\"\",$progbits");], [0])],
336 337 338 339 340 341
        [AC_MSG_RESULT(yes)
         HaskellHaveGnuNonexecStack=True],
        [AC_MSG_RESULT(no)
         HaskellHaveGnuNonexecStack=False])
    CFLAGS="$CFLAGS2"

342
    checkArch "$BuildArch" "HaskellBuildArch"
343 344 345
    checkVendor "$BuildVendor"
    checkOS "$BuildOS" ""

346
    checkArch "$HostArch" "HaskellHostArch"
347 348 349 350 351 352 353 354 355
    checkVendor "$HostVendor"
    checkOS "$HostOS" ""

    checkArch "$TargetArch" "HaskellTargetArch"
    checkVendor "$TargetVendor"
    checkOS "$TargetOS" "HaskellTargetOs"

    AC_SUBST(HaskellTargetArch)
    AC_SUBST(HaskellTargetOs)
356
    AC_SUBST(HaskellHaveSubsectionsViaSymbols)
357
    AC_SUBST(HaskellHaveIdentDirective)
358
    AC_SUBST(HaskellHaveGnuNonexecStack)
359 360 361 362 363
])


# GET_ARM_ISA
# ----------------------------------
Gabor Greif's avatar
Gabor Greif committed
364
# Get info about the ISA on the ARM arch
365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399
AC_DEFUN([GET_ARM_ISA],
[
    AC_COMPILE_IFELSE([
        AC_LANG_PROGRAM(
            [],
            [#if defined(__ARM_ARCH_2__)  || \
                 defined(__ARM_ARCH_3__)  || \
                 defined(__ARM_ARCH_3M__) || \
                 defined(__ARM_ARCH_4__)  || \
                 defined(__ARM_ARCH_4T__) || \
                 defined(__ARM_ARCH_5__)  || \
                 defined(__ARM_ARCH_5T__) || \
                 defined(__ARM_ARCH_5E__) || \
                 defined(__ARM_ARCH_5TE__)
                 return 0;
             #else
                 not pre arm v6
             #endif]
        )],
        [AC_DEFINE(arm_HOST_ARCH_PRE_ARMv6, 1, [ARM pre v6])
         AC_DEFINE(arm_HOST_ARCH_PRE_ARMv7, 1, [ARM pre v7])
         changequote(, )dnl
         ARM_ISA=ARMv5
         ARM_ISA_EXT="[]"
         changequote([, ])dnl
        ],
        [
            AC_COMPILE_IFELSE([
                AC_LANG_PROGRAM(
                    [],
                    [#if defined(__ARM_ARCH_6__)   || \
                         defined(__ARM_ARCH_6J__)  || \
                         defined(__ARM_ARCH_6T2__) || \
                         defined(__ARM_ARCH_6Z__)  || \
                         defined(__ARM_ARCH_6ZK__) || \
Moritz Angermann's avatar
Moritz Angermann committed
400 401
                         defined(__ARM_ARCH_6K__)  || \
                         defined(__ARM_ARCH_6KZ__) || \
402 403 404 405 406 407 408 409
                         defined(__ARM_ARCH_6M__)
                         return 0;
                     #else
                         not pre arm v7
                     #endif]
                )],
                [AC_DEFINE(arm_HOST_ARCH_PRE_ARMv7, 1, [ARM pre v7])
                 ARM_ISA=ARMv6
410 411 412 413 414 415 416 417 418 419 420
                 AC_COMPILE_IFELSE([
                        AC_LANG_PROGRAM(
                                [],
                                [#if defined(__VFP_FP__)
                                     return 0;
                                #else
                                     no vfp
                                #endif]
                        )],
                        [changequote(, )dnl
                         ARM_ISA_EXT="[VFPv2]"
421 422
                         changequote([, ])dnl
                        ],
423 424
                        [changequote(, )dnl
                         ARM_ISA_EXT="[]"
425 426
                         changequote([, ])dnl
                        ]
427
                )],
428 429
                [changequote(, )dnl
                 ARM_ISA=ARMv7
430
                 ARM_ISA_EXT="[VFPv3,NEON]"
431 432 433
                 changequote([, ])dnl
                ])
        ])
434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460

        AC_COMPILE_IFELSE(
               [AC_LANG_PROGRAM(
                       [],
                       [#if defined(__SOFTFP__)
                            return 0;
                       #else
                            not softfp
                       #endif]
               )],
               [changequote(, )dnl
                ARM_ABI="SOFT"
                changequote([, ])dnl
               ],
               [AC_COMPILE_IFELSE(
                    [AC_LANG_PROGRAM(
                       [],
                       [#if defined(__ARM_PCS_VFP)
                            return 0;
                       #else
                            no hard float ABI
                       #endif]
                    )],
                    [ARM_ABI="HARD"],
                    [ARM_ABI="SOFTFP"]
               )]
        )
461 462

        AC_SUBST(ARM_ISA)
463 464 465 466 467 468 469 470
])


# FP_SETTINGS
# ----------------------------------
# Set the variables used in the settings file
AC_DEFUN([FP_SETTINGS],
[
471
    if test "$windows" = YES -a "$EnableDistroToolchain" = "NO"
472
    then
473 474 475 476 477 478 479 480 481 482
        mingw_bin_prefix=mingw/bin/
        SettingsCCompilerCommand="\$topdir/../${mingw_bin_prefix}gcc.exe"
        SettingsHaskellCPPCommand="\$topdir/../${mingw_bin_prefix}gcc.exe"
        SettingsHaskellCPPFlags="$HaskellCPPArgs"
        SettingsLdCommand="\$topdir/../${mingw_bin_prefix}ld.exe"
        SettingsArCommand="\$topdir/../${mingw_bin_prefix}ar.exe"
        SettingsPerlCommand='$topdir/../perl/perl.exe'
        SettingsDllWrapCommand="\$topdir/../${mingw_bin_prefix}dllwrap.exe"
        SettingsWindresCommand="\$topdir/../${mingw_bin_prefix}windres.exe"
        SettingsTouchCommand='$topdir/bin/touchy.exe'
483 484 485 486 487 488 489 490 491 492 493 494
    elif test "$EnableDistroToolchain" = "YES"
    then
        SettingsCCompilerCommand="$(basename $CC)"
        SettingsCCompilerFlags="$CONF_CC_OPTS_STAGE2"
        SettingsHaskellCPPCommand="$(basename $HaskellCPPCmd)"
        SettingsHaskellCPPFlags="$HaskellCPPArgs"
        SettingsLdCommand="$(basename $LdCmd)"
        SettingsArCommand="$(basename $ArCmd)"
        SettingsPerlCommand="$(basename $PerlCmd)"
        SettingsDllWrapCommand="$(basename $DllWrapCmd)"
        SettingsWindresCommand="$(basename $WindresCmd)"
        SettingsTouchCommand='$topdir/bin/touchy.exe'
495
    else
496 497 498 499 500 501
        SettingsCCompilerCommand="$CC"
        SettingsHaskellCPPCommand="$HaskellCPPCmd"
        SettingsHaskellCPPFlags="$HaskellCPPArgs"
        SettingsLdCommand="$LdCmd"
        SettingsArCommand="$ArCmd"
        SettingsPerlCommand="$PerlCmd"
502
        if test -z "$DllWrapCmd"
503 504 505
        then
            SettingsDllWrapCommand="/bin/false"
        else
506
            SettingsDllWrapCommand="$DllWrapCmd"
507
        fi
508
        if test -z "$WindresCmd"
509 510 511
        then
            SettingsWindresCommand="/bin/false"
        else
512
            SettingsWindresCommand="$WindresCmd"
513
        fi
Moritz Angermann's avatar
Moritz Angermann committed
514 515 516 517 518 519 520
       SettingsTouchCommand='touch'
    fi
    if test -z "$LibtoolCmd"
    then
      SettingsLibtoolCommand="libtool"
    else
      SettingsLibtoolCommand="$LibtoolCmd"
521
    fi
Moritz Angermann's avatar
Moritz Angermann committed
522 523 524 525 526 527
    if test -z "$ClangCmd"
    then
        SettingsClangCommand="clang"
    else
        SettingsClangCommand="$ClangCmd"
    fi
528 529 530 531 532 533 534 535 536 537 538
    if test -z "$LlcCmd"
    then
      SettingsLlcCommand="llc"
    else
      SettingsLlcCommand="$LlcCmd"
    fi
    if test -z "$OptCmd"
    then
      SettingsOptCommand="opt"
    else
      SettingsOptCommand="$OptCmd"
539
    fi
540
    SettingsCCompilerFlags="$CONF_CC_OPTS_STAGE2"
541
    SettingsCCompilerLinkFlags="$CONF_GCC_LINKER_OPTS_STAGE2"
Ben Gamari's avatar
Ben Gamari committed
542
    SettingsCCompilerSupportsNoPie="$CONF_GCC_SUPPORTS_NO_PIE"
543
    SettingsLdFlags="$CONF_LD_LINKER_OPTS_STAGE2"
544
    AC_SUBST(SettingsCCompilerCommand)
545 546
    AC_SUBST(SettingsHaskellCPPCommand)
    AC_SUBST(SettingsHaskellCPPFlags)
547
    AC_SUBST(SettingsCCompilerFlags)
548
    AC_SUBST(SettingsCCompilerLinkFlags)
Ben Gamari's avatar
Ben Gamari committed
549
    AC_SUBST(SettingsCCompilerSupportsNoPie)
Simon Marlow's avatar
Simon Marlow committed
550
    AC_SUBST(SettingsLdCommand)
551
    AC_SUBST(SettingsLdFlags)
552
    AC_SUBST(SettingsArCommand)
553 554 555
    AC_SUBST(SettingsPerlCommand)
    AC_SUBST(SettingsDllWrapCommand)
    AC_SUBST(SettingsWindresCommand)
556
    AC_SUBST(SettingsLibtoolCommand)
557
    AC_SUBST(SettingsTouchCommand)
Moritz Angermann's avatar
Moritz Angermann committed
558
    AC_SUBST(SettingsClangCommand)
559 560
    AC_SUBST(SettingsLlcCommand)
    AC_SUBST(SettingsOptCommand)
561 562
])

563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604
# Helper for cloning a shell variable's state
AC_DEFUN([FP_COPY_SHELLVAR],
[if test -n "${$1+set}"; then $2="$$1"; else unset $2; fi ])

# FP_SET_CFLAGS_C99
# ----------------------------------
# figure out which CFLAGS are needed to place the compiler into C99 mode
# $1 is name of CC variable (unmodified)
# $2 is name of CC flags variable (augmented if needed)
# $3 is name of CPP flags variable (augmented if needed)
AC_DEFUN([FP_SET_CFLAGS_C99],
[
    dnl save current state of AC_PROG_CC_C99
    FP_COPY_SHELLVAR([CC],[fp_save_CC])
    FP_COPY_SHELLVAR([CFLAGS],[fp_save_CFLAGS])
    FP_COPY_SHELLVAR([CPPFLAGS],[fp_save_CPPFLAGS])
    FP_COPY_SHELLVAR([ac_cv_prog_cc_c99],[fp_save_cc_c99])
    dnl set local state
    CC="$$1"
    CFLAGS="$$2"
    CPPFLAGS="$$3"
    unset ac_cv_prog_cc_c99
    dnl perform detection
    _AC_PROG_CC_C99
    fp_cc_c99="$ac_cv_prog_cc_c99"
    case "x$ac_cv_prog_cc_c99" in
      x)   ;; # noop
      xno) AC_MSG_ERROR([C99-compatible compiler needed]) ;;
      *)   $2="$$2 $ac_cv_prog_cc_c99"
           $3="$$3 $ac_cv_prog_cc_c99"
           ;;
    esac
    dnl restore saved state
    FP_COPY_SHELLVAR([fp_save_CC],[CC])
    FP_COPY_SHELLVAR([fp_save_CFLAGS],[CFLAGS])
    FP_COPY_SHELLVAR([fp_save_CPPFLAGS],[CPPFLAGS])
    FP_COPY_SHELLVAR([fp_save_cc_c99],[ac_cv_prog_cc_c99])
    dnl cleanup
    unset fp_save_CC
    unset fp_save_CFLAGS
    unset fp_save_cc_c99
])
605

606 607
# FPTOOLS_SET_C_LD_FLAGS
# ----------------------------------
608
# Set the C, LD and CPP flags for a given platform.
609
# $1 is the platform
610 611 612 613
# $2 is the name of the CC flags variable
# $3 is the name of the linker flags variable when linking with gcc
# $4 is the name of the linker flags variable when linking with ld
# $5 is the name of the CPP flags variable
614 615
AC_DEFUN([FPTOOLS_SET_C_LD_FLAGS],
[
616
    AC_MSG_CHECKING([Setting up $2, $3, $4 and $5])
617
    case $$1 in
618
    i386-*)
619 620 621 622 623
        # Workaround for #7799
        $2="$$2 -U__i686"
        ;;
    esac

624
    case $$1 in
625 626 627
    i386-unknown-mingw32)
        $2="$$2 -march=i686"
        ;;
628 629 630
    i386-portbld-freebsd*)
        $2="$$2 -march=i686"
        ;;
631 632 633 634 635 636
    x86_64-unknown-solaris2)
        $2="$$2 -m64"
        $3="$$3 -m64"
        $4="$$4 -m64"
        $5="$$5 -m64"
        ;;
637 638 639 640 641 642 643 644 645 646 647 648 649 650 651
    alpha-*)
        # For now, to suppress the gcc warning "call-clobbered
        # register used for global register variable", we simply
        # disable all warnings altogether using the -w flag. Oh well.
        $2="$$2 -w -mieee -D_REENTRANT"
        $3="$$3 -w -mieee -D_REENTRANT"
        $5="$$5 -w -mieee -D_REENTRANT"
        ;;
    hppa*)
        # ___HPUX_SOURCE, not _HPUX_SOURCE, is #defined if -ansi!
        # (very nice, but too bad the HP /usr/include files don't agree.)
        $2="$$2 -D_HPUX_SOURCE"
        $3="$$3 -D_HPUX_SOURCE"
        $5="$$5 -D_HPUX_SOURCE"
        ;;
652 653
    arm*linux*)
        # On arm/linux and arm/android, tell gcc to generate Arm
654
        # instructions (ie not Thumb).
655
        $2="$$2 -marm"
656
        $3="$$3 -Wl,-z,noexecstack"
657 658 659 660
        $4="$$4 -z noexecstack"
        ;;

    aarch64*linux*)
661
        $3="$$3 -Wl,-z,noexecstack"
662
        $4="$$4 -z noexecstack"
663
        ;;
664 665

    powerpc-ibm-aix*)
666 667 668 669
        # We need `-D_THREAD_SAFE` to unlock the thread-local `errno`.
        $2="$$2 -D_THREAD_SAFE"
        $3="$$3 -D_THREAD_SAFE -Wl,-bnotextro"
        $4="$$4 -bnotextro"
670 671 672
        $5="$$5 -D_THREAD_SAFE"
        ;;

673 674 675
    x86_64-*-openbsd*)
        # We need -z wxneeded at least to link ghc-stage2 to workaround
        # W^X issue in GHCi on OpenBSD current (as of Aug 2016)
676
        $3="$$3 -Wl,-z,wxneeded"
677 678 679
        $4="$$4 -z wxneeded"
        ;;

680
    esac
681 682 683 684 685 686 687 688

    # If gcc knows about the stack protector, turn it off.
    # Otherwise the stack-smash handler gets triggered.
    echo 'int main(void) {return 0;}' > conftest.c
    if $CC -c conftest.c -fno-stack-protector > /dev/null 2>&1
    then
        $2="$$2 -fno-stack-protector"
    fi
689

Ian Lynagh's avatar
Ian Lynagh committed
690
    rm -f conftest.c conftest.o
Ian Lynagh's avatar
Ian Lynagh committed
691
    AC_MSG_RESULT([done])
692 693 694
])


695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712
# FP_VISIBILITY_HIDDEN
# ----------------------------------
# Is the visibility hidden attribute supported?
AC_DEFUN([FP_VISIBILITY_HIDDEN],
[
    AC_MSG_CHECKING([whether __attribute__((visibility("hidden"))) is supported])
    echo '__attribute__((visibility("hidden"))) void foo(void) {}' > conftest.c
    if $CC -Wall -Werror -c conftest.c > /dev/null 2>&1
    then
        AC_MSG_RESULT([yes])
        AC_DEFINE(HAS_VISIBILITY_HIDDEN, 1, [Has visibility hidden])
    else
        AC_MSG_RESULT([no])
    fi
    rm -f conftest.c conftest.o
])


713 714
# FPTOOLS_FLOAT_WORD_ORDER_BIGENDIAN
# ----------------------------------
Gabor Greif's avatar
Gabor Greif committed
715
# Little endian ARM on Linux with some ABIs has big endian word order
716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739
# in doubles. Define FLOAT_WORDS_BIGENDIAN if this is the case.
AC_DEFUN([FPTOOLS_FLOAT_WORD_ORDER_BIGENDIAN],
  [AC_CACHE_CHECK([whether float word order is big endian], [fptools_cv_float_word_order_bigendian],
    [AC_COMPILE_IFELSE(
      [AC_LANG_PROGRAM(
        [#include <endian.h>],
        [#if defined(__FLOAT_WORD_ORDER) && __FLOAT_WORD_ORDER == BIG_ENDIAN
             return 0;
         #else
             not float word order big endian
         #endif]
      )],
      [fptools_cv_float_word_order_bigendian=yes],
      [fptools_cv_float_word_order_bigendian=no])
    ])
  case $fptools_cv_float_word_order_bigendian in
      yes)
          AC_DEFINE([FLOAT_WORDS_BIGENDIAN], 1,
          [Define to 1 if your processor stores words of floats with
           the most significant byte first]) ;;
  esac
])


740 741 742
# FP_PROG_CONTEXT_DIFF
# --------------------
# Figure out how to do context diffs. Sets the output variable ContextDiffCmd.
743 744
#
# Note: NeXTStep thinks diff'ing a file against itself is "trouble".
745 746 747 748 749
AC_DEFUN([FP_PROG_CONTEXT_DIFF],
[AC_CACHE_CHECK([for a working context diff], [fp_cv_context_diff],
[echo foo > conftest1
echo foo > conftest2
fp_cv_context_diff=no
Ian Lynagh's avatar
Ian Lynagh committed
750
for fp_var in '-U 1' '-u1' '-C 1' '-c1'
751 752 753 754 755 756 757 758 759 760 761 762 763
do
  if diff $fp_var conftest1 conftest2 > /dev/null 2>&1; then
    fp_cv_context_diff="diff $fp_var"
    break
  fi
done])
if test x"$fp_cv_context_diff" = xno; then
   AC_MSG_ERROR([cannot figure out how to do context diffs])
fi
AC_SUBST(ContextDiffCmd, [$fp_cv_context_diff])
])# FP_PROG_CONTEXT_DIFF


764
# FP_COMPUTE_INT(EXPRESSION, VARIABLE, INCLUDES, IF-FAILS)
765
# --------------------------------------------------------
766 767 768
# Assign VARIABLE the value of the compile-time EXPRESSION using INCLUDES for
# compilation. Execute IF-FAILS when unable to determine the value. Works for
# cross-compilation, too.
769 770 771 772
#
# Implementation note: We are lazy and use an internal autoconf macro, but it
# is supported in autoconf versions 2.50 up to the actual 2.57, so there is
# little risk.
773 774 775 776 777 778 779 780 781 782
AC_DEFUN([FP_COMPUTE_INT],
[_AC_COMPUTE_INT([$1], [$2], [$3], [$4])[]dnl
])# FP_COMPUTE_INT


# FP_CHECK_ALIGNMENT(TYPE, [IGNORED], [INCLUDES = DEFAULT-INCLUDES])
# ------------------------------------------------------------------
# A variation of AC_CHECK_SIZEOF for computing the alignment restrictions of a
# given type. Defines ALIGNMENT_TYPE.
AC_DEFUN([FP_CHECK_ALIGNMENT],
783
[AS_LITERAL_IF(m4_translit([[$1]], [*], [p]), [],
784
               [AC_FATAL([$0: requires literal arguments])])[]dnl
785 786 787
AC_CHECK_TYPE([$1], [], [], [$3])[]dnl
m4_pushdef([fp_Cache], [AS_TR_SH([fp_cv_alignment_$1])])[]dnl
AC_CACHE_CHECK([alignment of $1], [fp_Cache],
788
[if test "$AS_TR_SH([ac_cv_type_$1])" = yes; then
789
  FP_COMPUTE_INT([offsetof(struct { char c; $1 ty; },ty)],
790
                 [fp_Cache],
791
                 [AC_INCLUDES_DEFAULT([$3])],
792 793
                 [AC_MSG_ERROR([cannot compute alignment ($1)
See `config.log' for more details.], [77])])
794
else
795 796 797 798
  fp_Cache=0
fi])[]dnl
AC_DEFINE_UNQUOTED(AS_TR_CPP(alignment_$1), $fp_Cache, [The alignment of a `$1'.])[]dnl
m4_popdef([fp_Cache])[]dnl
799 800 801
])# FP_CHECK_ALIGNMENT


802 803 804 805 806 807 808 809 810 811

# FP_CHECK_SIZEOF_AND_ALIGNMENT(TYPE)
# ------------------------------------------------------------------
# Combines AC_CHECK_SIZEOF and FP_CHECK_ALIGNMENT.
AC_DEFUN([FP_CHECK_SIZEOF_AND_ALIGNMENT],
[AC_CHECK_SIZEOF([$1])
FP_CHECK_ALIGNMENT([$1])
])# FP_CHECK_SIZEOF_AND_ALIGNMENT


812 813 814 815 816 817 818 819 820 821 822
# FP_LEADING_UNDERSCORE
# ---------------------
# Test for determining whether symbol names have a leading underscore. We assume
# that they _haven't_ if anything goes wrong. Sets the output variable
# LeadingUnderscore to YES or NO and defines LEADING_UNDERSCORE correspondingly.
#
# Some nlist implementations seem to try to be compatible by ignoring a leading
# underscore sometimes (eg. FreeBSD). We therefore have to work around this by
# checking for *no* leading underscore first. Sigh.  --SDM
#
# Similarly on OpenBSD, but this test doesn't help. -- dons
823
#
824 825 826 827 828
AC_DEFUN([FP_LEADING_UNDERSCORE],
[AC_CHECK_LIB([elf], [nlist], [LIBS="-lelf $LIBS"])
AC_CACHE_CHECK([leading underscore in symbol names], [fptools_cv_leading_underscore], [
# Hack!: nlist() under Digital UNIX insist on there being an _,
# but symbol table listings shows none. What is going on here?!?
829
case $TargetPlatform in
830 831 832 833 834 835 836 837 838 839 840
    # Apples mach-o platforms use leading underscores
    *-apple-*) fptools_cv_leading_underscore=yes;;
    *linux-android*) fptools_cv_leading_underscore=no;;
    *openbsd*) # x86 openbsd is ELF from 3.4 >, meaning no leading uscore
      case $build in
        i386-*2\.@<:@0-9@:>@ | i386-*3\.@<:@0-3@:>@ ) fptools_cv_leading_underscore=yes ;;
        *) fptools_cv_leading_underscore=no ;;
      esac ;;
    i386-unknown-mingw32) fptools_cv_leading_underscore=yes;;
    x86_64-unknown-mingw32) fptools_cv_leading_underscore=no;;
    *) AC_RUN_IFELSE([AC_LANG_SOURCE([[#ifdef HAVE_NLIST_H
sof's avatar
sof committed
841
#include <nlist.h>
842 843
struct nlist xYzzY1[] = {{"xYzzY1", 0},{0}};
struct nlist xYzzY2[] = {{"_xYzzY2", 0},{0}};
sof's avatar
sof committed
844 845
#endif

846 847 848
int main(argc, argv)
int argc;
char **argv;
sof's avatar
sof committed
849 850
{
#ifdef HAVE_NLIST_H
851 852 853
    if(nlist(argv[0], xYzzY1) == 0 && xYzzY1[0].n_value != 0)
        exit(1);
    if(nlist(argv[0], xYzzY2) == 0 && xYzzY2[0].n_value != 0)
854
        exit(0);
sof's avatar
sof committed
855 856
#endif
    exit(1);
857
}]])],[fptools_cv_leading_underscore=yes],[fptools_cv_leading_underscore=no],[fptools_cv_leading_underscore=no])
858
;;
859 860 861 862 863
esac]);
AC_SUBST([LeadingUnderscore], [`echo $fptools_cv_leading_underscore | sed 'y/yesno/YESNO/'`])
if test x"$fptools_cv_leading_underscore" = xyes; then
   AC_DEFINE([LEADING_UNDERSCORE], [1], [Define to 1 if C symbols have a leading underscore added by the compiler.])
fi])# FP_LEADING_UNDERSCORE
sof's avatar
sof committed
864

865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892

# FP_COMPARE_VERSIONS(VERSION1, TEST, VERSION2, [ACTION-IF-TRUE], [ACTION-IF-FALSE])
# ----------------------------------------------------------------------------------
# Compare dotted version numbers VERSION1 and VERSION2 lexicographically according
# to TEST (one of -eq, -ne, -lt, -le, -gt, or -ge).
AC_DEFUN([FP_COMPARE_VERSIONS],
[fp_version1=$1; fp_version2=$3
fp_save_IFS=$IFS; IFS='.'
while test x"$fp_version1" != x || test x"$fp_version2" != x
do

  set dummy $fp_version1; shift
  fp_num1=""
  test $[@%:@] = 0 || { fp_num1="[$]1"; shift; }
  test x"$fp_num1" = x && fp_num1="0"
  fp_version1="[$]*"

  set dummy $fp_version2; shift
  fp_num2=""
  test $[@%:@] = 0 || { fp_num2="[$]1"; shift; }
  test x"$fp_num2" = x && fp_num2="0"
  fp_version2="[$]*"

  test "$fp_num1" = "$fp_num2" || break;
done
IFS=$fp_save_IFS
AS_IF([test "$fp_num1" $2 "$fp_num2"], [$4], [$5])[]dnl
])# FP_COMPARE_VERSIONS
893 894


sof's avatar
sof committed
895
dnl
896 897
dnl Check for Happy and version.
dnl If there's no installed Happy, we look
898
dnl for a happy source tree and point the build system at that instead.
899 900
dnl If you increase the minimum version requirement, please also update:
dnl https://ghc.haskell.org/trac/ghc/wiki/Building/Preparation/Tools
901
dnl
902
AC_DEFUN([FPTOOLS_HAPPY],
903
[AC_PATH_PROG(HappyCmd,happy,)
904

sof's avatar
sof committed
905
AC_CACHE_CHECK([for version of happy], fptools_cv_happy_version,
sof's avatar
sof committed
906
changequote(, )dnl
907
[if test x"$HappyCmd" != x; then
908
   fptools_cv_happy_version=`"$HappyCmd" -v |
rwbarton's avatar
rwbarton committed
909
              grep 'Happy Version' | sed -e 's/Happy Version \([^ ]*\).*/\1/g'` ;
sof's avatar
sof committed
910
else
sof's avatar
sof committed
911
   fptools_cv_happy_version="";
sof's avatar
sof committed
912
fi;
913
changequote([, ])dnl
914
])
Austin Seipp's avatar
Austin Seipp committed
915
if test ! -f compiler/parser/Parser.hs || test ! -f compiler/cmm/CmmParse.hs
916
then
917 918
    FP_COMPARE_VERSIONS([$fptools_cv_happy_version],[-lt],[1.19.4],
      [AC_MSG_ERROR([Happy version 1.19.4 or later is required to compile GHC.])])[]
919
fi
920
HappyVersion=$fptools_cv_happy_version;
sof's avatar
sof committed
921 922 923
AC_SUBST(HappyVersion)
])

924
dnl
925 926 927
dnl Check for Alex and version.
dnl If you increase the minimum version requirement, please also update:
dnl https://ghc.haskell.org/trac/ghc/wiki/Building/Preparation/Tools
928
dnl
929
AC_DEFUN([FPTOOLS_ALEX],
930
[
931
AC_PATH_PROG(AlexCmd,alex,)
932

933 934
AC_CACHE_CHECK([for version of alex], fptools_cv_alex_version,
changequote(, )dnl
935
[if test x"$AlexCmd" != x; then
936
   fptools_cv_alex_version=`"$AlexCmd" -v |
rwbarton's avatar
rwbarton committed
937
              grep 'Alex [Vv]ersion' | sed -e 's/Alex [Vv]ersion \([0-9\.]*\).*/\1/g'` ;
938 939 940 941 942
else
   fptools_cv_alex_version="";
fi;
changequote([, ])dnl
])
943 944
FP_COMPARE_VERSIONS([$fptools_cv_alex_version],[-ge],[3.0],
  [Alex3=YES],[Alex3=NO])
945 946
if test ! -f compiler/cmm/CmmLex.hs || test ! -f compiler/parser/Lexer.hs
then
947 948
    FP_COMPARE_VERSIONS([$fptools_cv_alex_version],[-lt],[3.1.0],
      [AC_MSG_ERROR([Alex version 3.1.0 or later is required to compile GHC.])])[]
949
fi
950 951
AlexVersion=$fptools_cv_alex_version;
AC_SUBST(AlexVersion)
952
AC_SUBST(Alex3)
953 954
])

sof's avatar
sof committed
955

956 957 958 959 960
# FP_PROG_LD_FLAG
# ---------------
# Sets the output variable $2 to $1 if ld supports the $1 flag.
# Otherwise the variable's value is empty.
AC_DEFUN([FP_PROG_LD_FLAG],
961
[
962
AC_CACHE_CHECK([whether ld understands $1], [fp_cv_$2],
963
[echo 'int foo() { return 0; }' > conftest.c
964
${CC-cc} -c conftest.c
965 966
if ${LdCmd} -r $1 -o conftest2.o conftest.o > /dev/null 2>&1; then
   fp_cv_$2=$1
967
else
968
   fp_cv_$2=
969
fi
970
rm -rf conftest*])
971 972 973 974
$2=$fp_cv_$2
])# FP_PROG_LD_FLAG


975 976 977 978 979 980 981 982
# FP_PROG_LD_BUILD_ID
# ------------

# Sets the output variable LdHasBuildId to YES if ld supports
# --build-id, or NO otherwise.
AC_DEFUN([FP_PROG_LD_BUILD_ID],
[
AC_CACHE_CHECK([whether ld understands --build-id], [fp_cv_ld_build_id],
983
[echo 'int foo() { return 0; }' > conftest.c
984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999
${CC-cc} -c conftest.c
if ${LdCmd} -r --build-id=none -o conftest2.o conftest.o > /dev/null 2>&1; then
   fp_cv_ld_build_id=yes
else
   fp_cv_ld_build_id=no
fi
rm -rf conftest*])
if test "$fp_cv_ld_build_id" = yes; then
  LdHasBuildId=YES
else
  LdHasBuildId=NO
fi
AC_SUBST([LdHasBuildId])
])# FP_PROG_LD_BUILD_ID


1000 1001 1002 1003
# FP_PROG_LD_IS_GNU
# -----------------
# Sets the output variable LdIsGNULd to YES or NO, depending on whether it is
# GNU ld or not.
1004
AC_DEFUN([FP_PROG_LD_IS_GNU],[
1005
AC_CACHE_CHECK([whether ld is GNU ld], [fp_cv_gnu_ld],
1006 1007
[[if ${LdCmd} --version 2> /dev/null | grep "GNU" > /dev/null 2>&1; then
  fp_cv_gnu_ld=YES
1008
else
1009 1010 1011
  fp_cv_gnu_ld=NO
fi]])
AC_SUBST([LdIsGNULd],["$fp_cv_gnu_ld"])
1012
])# FP_PROG_LD_IS_GNU
1013

sof's avatar
sof committed
1014

1015 1016 1017 1018 1019 1020 1021 1022
# FP_PROG_LD_NO_COMPACT_UNWIND
# ----------------------------

# Sets the output variable LdHasNoCompactUnwind to YES if ld supports
# -no_compact_unwind, or NO otherwise.
AC_DEFUN([FP_PROG_LD_NO_COMPACT_UNWIND],
[
AC_CACHE_CHECK([whether ld understands -no_compact_unwind], [fp_cv_ld_no_compact_unwind],
1023
[echo 'int foo() { return 0; }' > conftest.c
1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039
${CC-cc} -c conftest.c
if ${LdCmd} -r -no_compact_unwind -o conftest2.o conftest.o > /dev/null 2>&1; then
   fp_cv_ld_no_compact_unwind=yes
else
   fp_cv_ld_no_compact_unwind=no
fi
rm -rf conftest*])
if test "$fp_cv_ld_no_compact_unwind" = yes; then
  LdHasNoCompactUnwind=YES
else
  LdHasNoCompactUnwind=NO
fi
AC_SUBST([LdHasNoCompactUnwind])
])# FP_PROG_LD_NO_COMPACT_UNWIND


1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071
# FP_PROG_LD_FILELIST
# -------------------

# Sets the output variable LdHasFilelist to YES if ld supports
# -filelist, or NO otherwise.
AC_DEFUN([FP_PROG_LD_FILELIST],
[
AC_CACHE_CHECK([whether ld understands -filelist], [fp_cv_ld_has_filelist],
[
    echo 'int foo() { return 0; }' > conftest1.c
    echo 'int bar() { return 0; }' > conftest2.c
    ${CC-cc} -c conftest1.c
    ${CC-cc} -c conftest2.c
    echo conftest1.o  > conftest.o-files
    echo conftest2.o >> conftest.o-files
    if ${LdCmd} -r -filelist conftest.o-files -o conftest.o > /dev/null 2>&1
    then
        fp_cv_ld_has_filelist=yes
    else
        fp_cv_ld_has_filelist=no
    fi
    rm -rf conftest*
])
if test "$fp_cv_ld_has_filelist" = yes; then
    LdHasFilelist=YES
else
    LdHasFilelist=NO
fi
AC_SUBST([LdHasFilelist])
])# FP_PROG_LD_FILELIST


1072 1073
# FP_PROG_AR
# ----------
1074
# Sets fp_prog_ar to a path to ar. Exits if no ar can be found
1075
AC_DEFUN([FP_PROG_AR],
1076 1077 1078
[if test -z "$fp_prog_ar"; then
  AC_PATH_PROG([fp_prog_ar], [ar])
fi
1079
if test -z "$fp_prog_ar"; then
1080
  AC_MSG_ERROR([cannot find ar in your PATH, no idea how to make a library])
sof's avatar
sof committed
1081
fi
1082 1083 1084 1085 1086 1087 1088 1089
])# FP_PROG_AR


# FP_PROG_AR_IS_GNU
# -----------------
# Sets fp_prog_ar_is_gnu to yes or no, depending on whether it is GNU ar or not.
AC_DEFUN([FP_PROG_AR_IS_GNU],
[AC_REQUIRE([FP_PROG_AR])
Ian Lynagh's avatar
Ian Lynagh committed
1090 1091
AC_CACHE_CHECK([whether $fp_prog_ar is GNU ar], [fp_cv_prog_ar_is_gnu],
[if "$fp_prog_ar" --version 2> /dev/null | grep "GNU" > /dev/null 2>&1; then
1092 1093 1094 1095 1096
  fp_cv_prog_ar_is_gnu=yes
else
  fp_cv_prog_ar_is_gnu=no
fi])
fp_prog_ar_is_gnu=$fp_cv_prog_ar_is_gnu
Ian Lynagh's avatar
Ian Lynagh committed
1097
AC_SUBST([ArIsGNUAr], [`echo $fp_prog_ar_is_gnu | tr 'a-z' 'A-Z'`])
1098 1099 1100
])# FP_PROG_AR_IS_GNU


1101 1102 1103 1104 1105 1106 1107
# FP_PROG_AR_SUPPORTS_ATFILE
# -----------------
# Sets fp_prog_ar_supports_atfile to yes or no, depending on whether
# or not it supports the @file syntax
AC_DEFUN([FP_PROG_AR_SUPPORTS_ATFILE],
[AC_REQUIRE([FP_PROG_AR])
 AC_REQUIRE([FP_PROG_AR_ARGS])
Ian Lynagh's avatar
Ian Lynagh committed
1108
AC_CACHE_CHECK([whether $fp_prog_ar supports @file], [fp_cv_prog_ar_supports_atfile],
1109 1110 1111 1112 1113
[
rm -f conftest*
touch conftest.file
echo conftest.file  > conftest.atfile
echo conftest.file >> conftest.atfile
Ian Lynagh's avatar
Ian Lynagh committed
1114 1115
"$fp_prog_ar" $fp_prog_ar_args conftest.a @conftest.atfile > /dev/null 2>&1
fp_prog_ar_supports_atfile_tmp=`"$fp_prog_ar" t conftest.a 2> /dev/null | grep -c conftest.file`
1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126
rm -f conftest*
if test "$fp_prog_ar_supports_atfile_tmp" -eq 2
then
  fp_cv_prog_ar_supports_atfile=yes
else
  fp_cv_prog_ar_supports_atfile=no
fi])
fp_prog_ar_supports_atfile=$fp_cv_prog_ar_supports_atfile
AC_SUBST([ArSupportsAtFile], [`echo $fp_prog_ar_supports_atfile | tr 'a-z' 'A-Z'`])
])# FP_PROG_AR_SUPPORTS_ATFILE

1127 1128 1129
# FP_PROG_AR_ARGS
# ---------------
# Sets fp_prog_ar_args to the arguments for ar and the output variable ArCmd
1130
# to an invocation of ar including these arguments.
1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143
AC_DEFUN([FP_PROG_AR_ARGS],
[AC_REQUIRE([FP_PROG_AR_IS_GNU])
AC_CACHE_CHECK([for ar arguments], [fp_cv_prog_ar_args],
[
# GNU ar needs special treatment: it appears to have problems with
# object files with the same name if you use the 's' modifier, but
# simple 'ar q' works fine, and doesn't need a separate ranlib.
if test $fp_prog_ar_is_gnu = yes; then
  fp_cv_prog_ar_args="q"
else
  touch conftest.dummy
  for fp_var in clqsZ clqs cqs clq cq ; do
     rm -f conftest.a
Ian Lynagh's avatar
Ian Lynagh committed
1144
     if "$fp_prog_ar" $fp_var conftest.a conftest.dummy > /dev/null 2> /dev/null; then
1145 1146 1147 1148 1149 1150
        fp_cv_prog_ar_args=$fp_var
        break
     fi
  done
  rm -f conftest*
  if test -z "$fp_cv_prog_ar_args"; then
Ian Lynagh's avatar
Ian Lynagh committed
1151
    AC_MSG_ERROR([cannot figure out how to use your $fp_prog_ar])
1152 1153 1154
  fi
fi])
fp_prog_ar_args=$fp_cv_prog_ar_args
1155 1156 1157
if test "$HostOS" != "mingw32"; then
    ArCmd = "$(cygpath -m $ArCmd)"
fi
1158 1159
AC_SUBST([ArCmd], ["$fp_prog_ar"])
AC_SUBST([ArArgs], ["$fp_prog_ar_args"])
1160 1161 1162 1163 1164 1165

])# FP_PROG_AR_ARGS


# FP_PROG_AR_NEEDS_RANLIB
# -----------------------
1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178
# Sets the output variable RANLIB_CMD to "ranlib" if it is needed and
# found, to "true" otherwise. Sets REAL_RANLIB_CMD to the ranlib program,
# even if we don't need ranlib (libffi might still need it).
AC_DEFUN([FP_PROG_AR_NEEDS_RANLIB],[
    AC_REQUIRE([FP_PROG_AR_IS_GNU])
    AC_REQUIRE([FP_PROG_AR_ARGS])
    AC_REQUIRE([AC_PROG_CC])

    AC_PROG_RANLIB

    if test $fp_prog_ar_is_gnu = yes
    then
        fp_cv_prog_ar_needs_ranlib=no
1179
    elif test "$TargetVendor_CPP" = "apple"
1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192
    then
        # It's quite tedious to check for Apple's crazy timestamps in
        # .a files, so we hardcode it.
        fp_cv_prog_ar_needs_ranlib=yes
    else
        case $fp_prog_ar_args in
        *s*)
            fp_cv_prog_ar_needs_ranlib=no;;
        *)
            fp_cv_prog_ar_needs_ranlib=yes;;
        esac
    fi

1193 1194 1195 1196 1197 1198 1199 1200 1201 1202
    # workaround for AC_PROG_RANLIB which sets RANLIB to `:' when
    # ranlib is missing on the target OS. The problem is that
    # ghc-cabal cannot execute `:' which is a shell built-in but can
    # execute `true' which is usually simple program supported by the
    # OS.
    # Fixes #8795
    if test "$RANLIB" = ":"
    then
        RANLIB="true"
    fi
1203 1204 1205 1206 1207 1208 1209 1210 1211
    REAL_RANLIB_CMD="$RANLIB"
    if test $fp_cv_prog_ar_needs_ranlib = yes
    then
        RANLIB_CMD="$RANLIB"
    else
        RANLIB_CMD="true"
    fi
    AC_SUBST([REAL_RANLIB_CMD])
    AC_SUBST([RANLIB_CMD])
1212 1213 1214
])# FP_PROG_AR_NEEDS_RANLIB


1215
# FP_GCC_VERSION
1216 1217
# -----------
# Extra testing of the result AC_PROG_CC, testing the gcc version no. Sets the
1218
# output variable GccVersion.
1219
AC_DEFUN([FP_GCC_VERSION],
1220
[AC_REQUIRE([AC_PROG_CC])
1221
if test -z "$CC"
1222
then
1223 1224
  AC_MSG_ERROR([gcc is required])
fi
1225
GccLT34=NO
1226
GccLT44=NO
1227
GccLT46=NO
1228
AC_CACHE_CHECK([version of gcc], [fp_cv_gcc_version],
1229 1230 1231 1232 1233 1234 1235 1236
[
    fp_cv_gcc_version="`$CC -v 2>&1 | grep 'version ' | sed -e 's/.*version [[^0-9]]*\([[0-9.]]*\).*/\1/g'`"
    FP_COMPARE_VERSIONS([$fp_cv_gcc_version], [-lt], [3.0],
                        [AC_MSG_ERROR([Need at least gcc version 3.0 (3.4+ recommended)])])
    # See #2770: gcc 2.95 doesn't work any more, apparently.  There probably
    # isn't a very good reason for that, but for now just make configure
    # fail.
    FP_COMPARE_VERSIONS([$fp_cv_gcc_version], [-lt], [3.4], GccLT34=YES)
1237
    FP_COMPARE_VERSIONS([$fp_cv_gcc_version], [-lt], [4.4], GccLT44=YES)
1238
    FP_COMPARE_VERSIONS([$fp_cv_gcc_version], [-lt], [4.6], GccLT46=YES)
1239
])
1240
AC_SUBST([GccVersion], [$fp_cv_gcc_version])
1241
AC_SUBST(GccLT34)
1242
AC_SUBST(GccLT44)
1243
AC_SUBST(GccLT46)
1244
])# FP_GCC_VERSION
1245

1246
dnl Check to see if the C compiler is clang or llvm-gcc
1247
dnl
1248
GccIsClang=NO
1249 1250
AC_DEFUN([FP_CC_LLVM_BACKEND],
[AC_REQUIRE([AC_PROG_CC])
1251
AC_MSG_CHECKING([whether C compiler is clang])
1252
$CC -x c /dev/null -dM -E > conftest.txt 2>&1
1253 1254
if grep "__clang__" conftest.txt >/dev/null 2>&1; then
  AC_SUBST([CC_CLANG_BACKEND], [1])
1255
  AC_SUBST([CC_LLVM_BACKEND], [1])
1256
  GccIsClang=YES
1257 1258 1259
  AC_MSG_RESULT([yes])
else
  AC_MSG_RESULT([no])
1260 1261 1262 1263 1264 1265 1266 1267 1268 1269
  AC_MSG_CHECKING([whether C compiler has an LLVM back end])
  if grep "__llvm__" conftest.txt >/dev/null 2>&1; then
    AC_SUBST([CC_CLANG_BACKEND], [0])
    AC_SUBST([CC_LLVM_BACKEND], [1])
    AC_MSG_RESULT([yes])
  else
    AC_SUBST([CC_CLANG_BACKEND], [0])
    AC_SUBST([CC_LLVM_BACKEND], [0])
    AC_MSG_RESULT([no])
  fi
1270
fi
1271
AC_SUBST(GccIsClang)
1272

1273 1274 1275
rm -f conftest.txt
])

Ben Gamari's avatar
Ben Gamari committed
1276 1277 1278 1279 1280 1281 1282 1283 1284
# FP_GCC_SUPPORTS_NO_PIE
# ----------------------
# Does gcc support the -no-pie option? If so we should pass it to gcc when
# joining objects since -pie may be enabled by default.
AC_DEFUN([FP_GCC_SUPPORTS_NO_PIE],
[
   AC_REQUIRE([AC_PROG_CC])
   AC_MSG_CHECKING([whether GCC supports -no-pie])
   echo 'int main() { return 0; }' > conftest.c
1285 1286
   # Some GCC versions only warn when passed an unrecognized flag.
   if $CC -no-pie -x c /dev/null -dM -E > conftest.txt 2>&1 && ! grep -i unrecognized conftest.txt > /dev/null 2>&1; then
Ben Gamari's avatar
Ben Gamari committed
1287 1288 1289 1290 1291 1292 1293 1294 1295
       CONF_GCC_SUPPORTS_NO_PIE=YES
       AC_MSG_RESULT([yes])
   else
       CONF_GCC_SUPPORTS_NO_PIE=NO
       AC_MSG_RESULT([no])
   fi
   rm -f conftest.c conftest.o conftest
])

sof's avatar
sof committed
1296
dnl Small feature test for perl version. Assumes PerlCmd
1297 1298 1299 1300
dnl contains path to perl binary.
dnl
dnl (Perl versions prior to v5.6 does not contain the string "v5";
dnl instead they display version strings such as "version 5.005".)
sof's avatar
sof committed
1301
dnl
1302
AC_DEFUN([FPTOOLS_CHECK_PERL_VERSION],
sof's avatar
sof committed
1303
[$PerlCmd -v >conftest.out 2>&1
1304
   if grep "v5" conftest.out >/dev/null 2>&1; then
1305 1306
      :
   else
1307
      AC_MSG_ERROR([your version of perl probably won't work, try upgrading it.])
1308
   fi
sof's avatar
sof committed
1309 1310
rm -fr conftest*
])
1311

1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326

# FP_CHECK_PROG(VARIABLE, PROG-TO-CHECK-FOR,
#               [VALUE-IF-NOT-FOUND], [PATH], [REJECT])
# -----------------------------------------------------
# HACK: A small wrapper around AC_CHECK_PROG, setting VARIABLE to the full path
# of PROG-TO-CHECK-FOR when found.
AC_DEFUN([FP_CHECK_PROG],
[AC_CHECK_PROG([$1], [$2], [$as_dir/$ac_word$ac_exec_ext], [$3], [$4], [$5])][]dnl
)# FP_CHECK_PROC


# FP_PROG_FIND
# ------------
# Find a non-WinDoze version of the "find" utility.
AC_DEFUN([FP_PROG_FIND],
Ian Lynagh's avatar
Ian Lynagh committed
1327
[AC_PATH_PROGS([fp_prog_find], [gfind find], find)
1328 1329 1330 1331 1332
echo foo > conftest.txt
$fp_prog_find conftest.txt -print > conftest.out 2>&1
if grep '^conftest.txt$' conftest.out > /dev/null 2>&1 ; then
  # OK, looks like a real "find".
  FindCmd="$fp_prog_find"
sof's avatar
sof committed
1333
else
1334 1335 1336
  # Found a poor WinDoze version of "find", ignore it.
  AC_MSG_WARN([$fp_prog_find looks like a non-*nix find, ignoring it])
  FP_CHECK_PROG([FindCmd], [find], [], [], [$fp_prog_find])
sof's avatar
sof committed
1337
fi
1338 1339 1340 1341
rm -f conftest.txt conftest.out
AC_SUBST([FindCmd])[]dnl
])# FP_PROG_FIND

sof's avatar
sof committed
1342

1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362
# FP_PROG_SORT
# ------------
# Find a Unix-like sort
AC_DEFUN([FP_PROG_SORT],
[AC_PATH_PROG([fp_prog_sort], [sort])
echo conwip > conftest.txt
$fp_prog_sort -f conftest.txt > conftest.out 2>&1
if grep 'conwip' conftest.out > /dev/null 2>&1 ; then
  # The goods
  SortCmd="$fp_prog_sort"
else
  # Summink else..pick next one.
  AC_MSG_WARN([$fp_prog_sort looks like a non-*nix sort, ignoring it])
  FP_CHECK_PROG([SortCmd], [sort], [], [], [$fp_prog_sort])
fi
rm -f conftest.txt conftest.out
AC_SUBST([SortCmd])[]dnl
])# FP_PROG_SORT


1363 1364 1365 1366 1367 1368 1369
dnl
dnl FPTOOLS_NOCACHE_CHECK prints a message, then sets the
dnl values of the second argument to the result of running
dnl the commands given by the third. It does not cache its
dnl result, so it is suitable for checks which should be
dnl run every time.
dnl
1370
AC_DEFUN([FPTOOLS_NOCACHE_CHECK],
1371 1372 1373 1374 1375
[AC_MSG_CHECKING([$1])
 $3
 AC_MSG_RESULT([$][$2])
])

1376 1377 1378
dnl
dnl FPTOOLS_GHC_VERSION(version)
dnl FPTOOLS_GHC_VERSION(major, minor [, patchlevel])
1379
dnl FPTOOLS_GHC_VERSION(version, major, minor, patchlevel)
1380 1381
dnl
dnl Test for version of installed ghc.  Uses $GHC.
1382
dnl [original version pinched from c2hs]
1383
dnl
1384
AC_DEFUN([FPTOOLS_GHC_VERSION],
1385
[FPTOOLS_NOCACHE_CHECK([version of ghc], [fptools_version_of_ghc],
1386
["${WithGhc-ghc}" --version > conftestghc 2>&1
1387
  cat conftestghc >&AS_MESSAGE_LOG_FD
1388 1389
#Useless Use Of cat award...
  fptools_version_of_ghc=`cat conftestghc | sed -n -e 's/, patchlevel *\([[0-9]]\)/.\1/;s/.* version \([[0-9]][[0-9.]]*\).*/\1/p'`
1390
  rm -fr conftest*
1391
  if test "[$]fptools_version_of_ghc" = ""
1392
  then
1393 1394 1395 1396 1397 1398 1399
    fptools_version_of_ghc='unknown'
  fi
fptools_version_of_ghc[_major]=`echo [$]fptools_version_of_ghc | sed -e 's/^\([[0-9]]\).*/\1/'`
fptools_version_of_ghc[_minor]=`echo [$]fptools_version_of_ghc | sed -e 's/^[[0-9]]\.\([[0-9]]*\).*/\1/'`
fptools_version_of_ghc[_pl]=`echo [$]fptools_version_of_ghc | sed -n -e 's/^[[0-9]]\.[[0-9]]*\.\([[0-9]]*\)/\1/p'`
#
if test "[$]fptools_version_of_ghc[_pl]" = ""
1400
then
1401 1402
  fptools_version_of_ghc[_all]="[$]fptools_version_of_ghc[_major].[$]fptools_version_of_ghc[_minor]"
  fptools_version_of_ghc[_pl]="0"
1403
else
1404
  fptools_version_of_ghc[_all]="[$]fptools_version_of_ghc[_major].[$]fptools_version_of_ghc[_minor].[$]fptools_version_of_ghc[_pl]"
1405
fi
1406
#
1407
ifelse($#, [1], [dnl
1408
[$1]="[$]fptools_version_of_ghc[_all]"
1409
], $#, [2], [dnl
1410 1411
[$1]="[$]fptools_version_of_ghc[_major]"
[$2]="[$]fptools_version_of_ghc[_minor]"
1412
], $#, [3], [dnl
1413 1414 1415
[$1]="[$]fptools_version_of_ghc[_major]"
[$2]="[$]fptools_version_of_ghc[_minor]"
[$3]="[$]fptools_version_of_ghc[_pl]"
1416
], $#, [4], [dnl
1417 1418 1419 1420 1421 1422
[$1]="[$]fptools_version_of_ghc[_all]"
[$2]="[$]fptools_version_of_ghc[_major]"
[$3]="[$]fptools_version_of_ghc[_minor]"
[$4]="[$]fptools_version_of_ghc[_pl]"
])
])
1423
])dnl
1424 1425


1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442
# FP_CHECK_FUNC(FUNCTION, PROLOGUE, BODY, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
# ---------------------------------------------------------------------------------
# A variant of AC_CHECK_FUNCS, limited to a single FUNCTION, but with the
# additional flexibility of specifying the PROLOGUE and BODY.
AC_DEFUN([FP_CHECK_FUNC],
[AS_VAR_PUSHDEF([fp_func], [fp_cv_func_$1])dnl
AC_CACHE_CHECK([for $1], fp_func,
[AC_LINK_IFELSE([AC_LANG_PROGRAM([$2], [$3])],
                [AS_VAR_SET(fp_func, yes)],
                [AS_VAR_SET(fp_func, no)])])
AS_IF([test AS_VAR_GET(fp_func) = yes],
      [AC_DEFINE(AS_TR_CPP(HAVE_$1), [1],
                [Define to 1 if you have the `]$1[' function.]) $4],
      [$5])dnl
AS_VAR_POPDEF([fp_func])dnl
])# FP_CHECK_FUNC

1443 1444 1445
# FP_PROG_GHC_PKG
# ----------------
# Try to find a ghc-pkg matching the ghc mentioned in the environment variable
Ian Lynagh's avatar
Ian Lynagh committed
1446
# WithGhc. Sets the output variable GhcPkgCmd.
1447 1448
AC_DEFUN([FP_PROG_GHC_PKG],
[AC_CACHE_CHECK([for ghc-pkg matching $WithGhc], fp_cv_matching_ghc_pkg,
Ian Lynagh's avatar
Ian Lynagh committed
1449 1450 1451 1452 1453 1454
[
# If we are told to use ghc-stage2, then we're using an in-tree
# compiler. In this case, we just want ghc-pkg, not ghc-pkg-stage2,
# so we sed off -stage[0-9]$. However, if we are told to use
# ghc-6.12.1 then we want to use ghc-pkg-6.12.1, so we keep any
# other suffix.
1455
fp_ghc_pkg_guess=`echo "$WithGhc" | sed -e 's/-stage@<:@0-9@:>@$//' -e 's,ghc\(@<:@^/\\@:>@*\)$,ghc-pkg\1,'`
Ian Lynagh's avatar
Ian Lynagh committed
1456
if "$fp_ghc_pkg_guess" list > /dev/null 2>&1; then
1457
  fp_cv_matching_ghc_pkg=$fp_ghc_pkg_guess
1458
else
Ian Lynagh's avatar
Ian Lynagh committed
1459
  AC_MSG_ERROR([Cannot find matching ghc-pkg])
1460
fi])
Ian Lynagh's avatar
Ian Lynagh committed
1461 1462 1463
GhcPkgCmd=$fp_cv_matching_ghc_pkg
AC_SUBST([GhcPkgCmd])
])# FP_PROG_GHC_PKG
1464

1465

1466 1467 1468 1469 1470 1471 1472 1473 1474
# FP_GCC_EXTRA_FLAGS
# ------------------
# Determine which extra flags we need to pass gcc when we invoke it
# to compile .hc code.
#
# -fwrapv is needed for gcc to emit well-behaved code in the presence of
# integer wrap around. (Trac #952)
#
AC_DEFUN([FP_GCC_EXTRA_FLAGS],
1475
[AC_REQUIRE([FP_GCC_VERSION])
1476 1477
AC_CACHE_CHECK([for extra options to pass gcc when compiling via C], [fp_cv_gcc_extra_opts],
[fp_cv_gcc_extra_opts=
1478
 FP_COMPARE_VERSIONS([$fp_cv_gcc_version], [-ge], [3.4],
1479 1480
  [fp_cv_gcc_extra_opts="$fp_cv_gcc_extra_opts -fwrapv"],
  [])
1481 1482 1483
 FP_COMPARE_VERSIONS([$fp_cv_gcc_version], [-ge], [4.0],
  [fp_cv_gcc_extra_opts="$fp_cv_gcc_extra_opts -fno-builtin"],
  [])
1484 1485 1486
])
AC_SUBST([GccExtraViaCOpts],$fp_cv_gcc_extra_opts)
])
1487

1488

1489 1490 1491
# FP_SETUP_PROJECT_VERSION
# ---------------------
AC_DEFUN([FP_SETUP_PROJECT_VERSION],
1492 1493 1494
[
if test "$RELEASE" = "NO"; then
    AC_MSG_CHECKING([for GHC version date])
1495 1496
    if test -f VERSION_DATE; then
        PACKAGE_VERSION=${PACKAGE_VERSION}.`cat VERSION_DATE`
Ian Lynagh's avatar
Ian Lynagh committed
1497
        AC_MSG_RESULT(given $PACKAGE_VERSION)
1498 1499
    elif test -d .git; then
        changequote(, )dnl
1500 1501
        ver_posixtime=`git log -1 --pretty=format:%ct`
        ver_date=`perl -MPOSIX -e "print strftime('%Y%m%d', gmtime($ver_posixtime));"`
1502 1503
        if echo $ver_date | grep '^[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]$' 2>&1 >/dev/null; then true; else
        changequote([, ])dnl
1504
                AC_MSG_ERROR([failed to detect version date: check that git and perl are in your path])
1505 1506 1507
        fi
        PACKAGE_VERSION=${PACKAGE_VERSION}.$ver_date
        AC_MSG_RESULT(inferred $PACKAGE_VERSION)
1508
    elif test -f VERSION; then
1509
        PACKAGE_VERSION=`cat VERSION`
Ian Lynagh's avatar
Ian Lynagh committed
1510
        AC_MSG_RESULT(given $PACKAGE_VERSION)
1511
    else
1512
        AC_MSG_WARN([cannot determine snapshot version: no .git directory and no VERSION file])
Gabor Greif's avatar
Gabor Greif committed
1513
        dnl We'd really rather this case didn't happen, but it might
1514 1515 1516 1517 1518 1519 1520 1521
        dnl do (in particular, people using lndir trees may find that
        dnl the build system can't find any other date). If it does
        dnl happen, then we use the current date.
        dnl This way we get some idea about how recent a build is.
        dnl It also means that packages built for 2 different builds
        dnl will probably use different version numbers, so things are
        dnl less likely to go wrong.
        PACKAGE_VERSION=${PACKAGE_VERSION}.`date +%Y%m%d`
1522
    fi
1523
fi
1524 1525 1526 1527 1528 1529 1530