aclocal.m4 73.8 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_LLVM_TARGET([$target_cpu],[$target_vendor],[$target_os],[LlvmTarget])

114 115
    GHC_SELECT_FILE_EXTENSIONS([$host], [exeext_host], [soext_host])
    GHC_SELECT_FILE_EXTENSIONS([$target], [exeext_target], [soext_target])
116 117 118 119 120 121
    windows=NO
    case $host in
    *-unknown-mingw32)
        windows=YES
        ;;
    esac
122

123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140
    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'`

141
    # we intend to pass trough --targets to llvm as is.
142
    LLVMTarget_CPP=`    echo "$LlvmTarget"`
143

144 145 146
    echo "GHC build  : $BuildPlatform"
    echo "GHC host   : $HostPlatform"
    echo "GHC target : $TargetPlatform"
147
    echo "LLVM target: $LlvmTarget"
148 149 150 151 152 153 154 155 156 157 158 159 160 161 162

    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)
163
    AC_SUBST(LLVMTarget_CPP)
164 165 166 167 168

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

169 170 171 172
    AC_SUBST(exeext_host)
    AC_SUBST(exeext_target)
    AC_SUBST(soext_host)
    AC_SUBST(soext_target)
173 174 175 176 177 178 179 180
])


# FPTOOLS_SET_HASKELL_PLATFORM_VARS
# ----------------------------------
# Set the Haskell platform variables
AC_DEFUN([FPTOOLS_SET_HASKELL_PLATFORM_VARS],
[
181 182
    checkArch() {
        case [$]1 in
183 184 185
        i386)
            test -z "[$]2" || eval "[$]2=ArchX86"
            ;;
186
        x86_64|amd64)
187 188 189 190 191 192
            test -z "[$]2" || eval "[$]2=ArchX86_64"
            ;;
        powerpc)
            test -z "[$]2" || eval "[$]2=ArchPPC"
            ;;
        powerpc64)
193 194 195 196
            test -z "[$]2" || eval "[$]2=\"ArchPPC_64 {ppc_64ABI = ELF_V1}\""
            ;;
        powerpc64le)
            test -z "[$]2" || eval "[$]2=\"ArchPPC_64 {ppc_64ABI = ELF_V2}\""
197 198 199 200
            ;;
        sparc)
            test -z "[$]2" || eval "[$]2=ArchSPARC"
            ;;
201 202 203
        sparc64)
            test -z "[$]2" || eval "[$]2=ArchSPARC64"
            ;;
204 205
        arm)
            GET_ARM_ISA()
206
            test -z "[$]2" || eval "[$]2=\"ArchARM {armISA = \$ARM_ISA, armISAExt = \$ARM_ISA_EXT, armABI = \$ARM_ABI}\""
207
            ;;
Colin Watson's avatar
Colin Watson committed
208 209 210
        aarch64)
            test -z "[$]2" || eval "[$]2=ArchARM64"
            ;;
211 212 213 214 215 216 217 218 219
        alpha)
            test -z "[$]2" || eval "[$]2=ArchAlpha"
            ;;
        mips|mipseb)
            test -z "[$]2" || eval "[$]2=ArchMipseb"
            ;;
        mipsel)
            test -z "[$]2" || eval "[$]2=ArchMipsel"
            ;;
220
        hppa|hppa1_1|ia64|m68k|rs6000|s390|s390x|sh4|vax)
221
            test -z "[$]2" || eval "[$]2=ArchUnknown"
222 223 224 225 226 227 228 229 230 231
            ;;
        *)
            echo "Unknown arch [$]1"
            exit 1
            ;;
        esac
    }

    checkVendor() {
        case [$]1 in
232
        dec|none|unknown|hp|apple|next|sun|sgi|ibm|montavista|portbld)
233 234
            ;;
        *)
235
            AC_MSG_WARN([Unknown vendor [$]1])
236 237 238 239 240 241
            ;;
        esac
    }

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

288 289 290 291 292 293 294 295 296 297 298 299 300 301
    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)])

302 303 304 305 306 307 308 309 310 311
    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])

312 313 314 315 316 317 318 319
    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=
320 321 322 323 324 325 326 327 328
    case $TargetArch in
      arm)
        dnl See #13937.
        progbits="%progbits"
        ;;
      *)
        progbits="@progbits"
        ;;
    esac
329 330
    AC_MSG_CHECKING(for GNU non-executable stack support)
    AC_COMPILE_IFELSE(
331
        [AC_LANG_PROGRAM([__asm__ (".section .note.GNU-stack,\"\",$progbits");], [0])],
332 333 334 335 336 337
        [AC_MSG_RESULT(yes)
         HaskellHaveGnuNonexecStack=True],
        [AC_MSG_RESULT(no)
         HaskellHaveGnuNonexecStack=False])
    CFLAGS="$CFLAGS2"

338
    checkArch "$BuildArch" "HaskellBuildArch"
339 340 341
    checkVendor "$BuildVendor"
    checkOS "$BuildOS" ""

342
    checkArch "$HostArch" "HaskellHostArch"
343 344 345 346 347 348 349 350 351
    checkVendor "$HostVendor"
    checkOS "$HostOS" ""

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

    AC_SUBST(HaskellTargetArch)
    AC_SUBST(HaskellTargetOs)
352
    AC_SUBST(HaskellHaveSubsectionsViaSymbols)
353
    AC_SUBST(HaskellHaveIdentDirective)
354
    AC_SUBST(HaskellHaveGnuNonexecStack)
355 356 357 358 359
])


# GET_ARM_ISA
# ----------------------------------
Gabor Greif's avatar
Gabor Greif committed
360
# Get info about the ISA on the ARM arch
361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395
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
396 397
                         defined(__ARM_ARCH_6K__)  || \
                         defined(__ARM_ARCH_6KZ__) || \
398 399 400 401 402 403 404 405
                         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
406 407 408 409 410 411 412 413 414 415 416
                 AC_COMPILE_IFELSE([
                        AC_LANG_PROGRAM(
                                [],
                                [#if defined(__VFP_FP__)
                                     return 0;
                                #else
                                     no vfp
                                #endif]
                        )],
                        [changequote(, )dnl
                         ARM_ISA_EXT="[VFPv2]"
417 418
                         changequote([, ])dnl
                        ],
419 420
                        [changequote(, )dnl
                         ARM_ISA_EXT="[]"
421 422
                         changequote([, ])dnl
                        ]
423
                )],
424 425
                [changequote(, )dnl
                 ARM_ISA=ARMv7
426
                 ARM_ISA_EXT="[VFPv3,NEON]"
427 428 429
                 changequote([, ])dnl
                ])
        ])
430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456

        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"]
               )]
        )
457 458

        AC_SUBST(ARM_ISA)
459 460 461 462 463 464 465 466
])


# FP_SETTINGS
# ----------------------------------
# Set the variables used in the settings file
AC_DEFUN([FP_SETTINGS],
[
467
    if test "$windows" = YES -a "$EnableDistroToolchain" = "NO"
468
    then
469 470 471 472 473 474
        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/../${mingw_bin_prefix}ar.exe"
Moritz Angermann's avatar
Moritz Angermann committed
475
        SettingsRanlibCommand="\$topdir/../${mingw_bin_prefix}ranlib.exe"
476 477 478 479
        SettingsPerlCommand='$topdir/../perl/perl.exe'
        SettingsDllWrapCommand="\$topdir/../${mingw_bin_prefix}dllwrap.exe"
        SettingsWindresCommand="\$topdir/../${mingw_bin_prefix}windres.exe"
        SettingsTouchCommand='$topdir/bin/touchy.exe'
480 481 482 483 484 485 486 487 488 489 490 491
    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'
492
    else
493 494 495 496 497
        SettingsCCompilerCommand="$CC"
        SettingsHaskellCPPCommand="$HaskellCPPCmd"
        SettingsHaskellCPPFlags="$HaskellCPPArgs"
        SettingsLdCommand="$LdCmd"
        SettingsArCommand="$ArCmd"
Moritz Angermann's avatar
Moritz Angermann committed
498
        SettingsRanlibCommand="$RanlibCmd"
499
        SettingsPerlCommand="$PerlCmd"
500
        if test -z "$DllWrapCmd"
501 502 503
        then
            SettingsDllWrapCommand="/bin/false"
        else
504
            SettingsDllWrapCommand="$DllWrapCmd"
505
        fi
506
        if test -z "$WindresCmd"
507 508 509
        then
            SettingsWindresCommand="/bin/false"
        else
510
            SettingsWindresCommand="$WindresCmd"
511
        fi
Moritz Angermann's avatar
Moritz Angermann committed
512 513 514 515 516 517 518
       SettingsTouchCommand='touch'
    fi
    if test -z "$LibtoolCmd"
    then
      SettingsLibtoolCommand="libtool"
    else
      SettingsLibtoolCommand="$LibtoolCmd"
519
    fi
Moritz Angermann's avatar
Moritz Angermann committed
520 521 522 523 524 525
    if test -z "$ClangCmd"
    then
        SettingsClangCommand="clang"
    else
        SettingsClangCommand="$ClangCmd"
    fi
526 527 528 529 530 531 532 533 534 535 536
    if test -z "$LlcCmd"
    then
      SettingsLlcCommand="llc"
    else
      SettingsLlcCommand="$LlcCmd"
    fi
    if test -z "$OptCmd"
    then
      SettingsOptCommand="opt"
    else
      SettingsOptCommand="$OptCmd"
537
    fi
538
    SettingsCCompilerFlags="$CONF_CC_OPTS_STAGE2"
539
    SettingsCCompilerLinkFlags="$CONF_GCC_LINKER_OPTS_STAGE2"
Ben Gamari's avatar
Ben Gamari committed
540
    SettingsCCompilerSupportsNoPie="$CONF_GCC_SUPPORTS_NO_PIE"
541
    SettingsLdFlags="$CONF_LD_LINKER_OPTS_STAGE2"
542
    AC_SUBST(SettingsCCompilerCommand)
543 544
    AC_SUBST(SettingsHaskellCPPCommand)
    AC_SUBST(SettingsHaskellCPPFlags)
545
    AC_SUBST(SettingsCCompilerFlags)
546
    AC_SUBST(SettingsCCompilerLinkFlags)
Ben Gamari's avatar
Ben Gamari committed
547
    AC_SUBST(SettingsCCompilerSupportsNoPie)
Simon Marlow's avatar
Simon Marlow committed
548
    AC_SUBST(SettingsLdCommand)
549
    AC_SUBST(SettingsLdFlags)
550
    AC_SUBST(SettingsArCommand)
Moritz Angermann's avatar
Moritz Angermann committed
551
    AC_SUBST(SettingsRanlibCommand)
552 553 554
    AC_SUBST(SettingsPerlCommand)
    AC_SUBST(SettingsDllWrapCommand)
    AC_SUBST(SettingsWindresCommand)
555
    AC_SUBST(SettingsLibtoolCommand)
556
    AC_SUBST(SettingsTouchCommand)
Moritz Angermann's avatar
Moritz Angermann committed
557
    AC_SUBST(SettingsClangCommand)
558 559
    AC_SUBST(SettingsLlcCommand)
    AC_SUBST(SettingsOptCommand)
560 561
])

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
# 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
])
604

605 606
# FPTOOLS_SET_C_LD_FLAGS
# ----------------------------------
607
# Set the C, LD and CPP flags for a given platform.
608
# $1 is the platform
609 610 611 612
# $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
613 614
AC_DEFUN([FPTOOLS_SET_C_LD_FLAGS],
[
615
    AC_MSG_CHECKING([Setting up $2, $3, $4 and $5])
616
    case $$1 in
617
    i386-*)
618 619 620 621 622
        # Workaround for #7799
        $2="$$2 -U__i686"
        ;;
    esac

623
    case $$1 in
624 625 626
    i386-unknown-mingw32)
        $2="$$2 -march=i686"
        ;;
627 628 629
    i386-portbld-freebsd*)
        $2="$$2 -march=i686"
        ;;
630 631 632 633 634 635
    x86_64-unknown-solaris2)
        $2="$$2 -m64"
        $3="$$3 -m64"
        $4="$$4 -m64"
        $5="$$5 -m64"
        ;;
636 637 638 639 640 641 642 643 644 645 646 647 648 649 650
    alpha-*)
        # For now, to suppress the gcc warning "call-clobbered
        # register used for global register variable", we simply
        # disable all warnings altogether using the -w flag. Oh well.
        $2="$$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="$$5 -D_HPUX_SOURCE"
        ;;
651 652
    arm*linux*)
        # On arm/linux and arm/android, tell gcc to generate Arm
653
        # instructions (ie not Thumb).
654
        $2="$$2 -marm"
655
        $3="$$3 -Wl,-z,noexecstack"
656 657 658 659
        $4="$$4 -z noexecstack"
        ;;

    aarch64*linux*)
660
        $3="$$3 -Wl,-z,noexecstack"
661
        $4="$$4 -z noexecstack"
662
        ;;
663 664

    powerpc-ibm-aix*)
665 666 667 668
        # We need `-D_THREAD_SAFE` to unlock the thread-local `errno`.
        $2="$$2 -D_THREAD_SAFE"
        $3="$$3 -D_THREAD_SAFE -Wl,-bnotextro"
        $4="$$4 -bnotextro"
669 670 671
        $5="$$5 -D_THREAD_SAFE"
        ;;

672 673 674
    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)
675
        $3="$$3 -Wl,-z,wxneeded"
676 677 678
        $4="$$4 -z wxneeded"
        ;;

679
    esac
680 681 682 683 684 685 686 687

    # 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
688

Ian Lynagh's avatar
Ian Lynagh committed
689
    rm -f conftest.c conftest.o
Ian Lynagh's avatar
Ian Lynagh committed
690
    AC_MSG_RESULT([done])
691 692 693
])


694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711
# 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
])


712 713
# FPTOOLS_FLOAT_WORD_ORDER_BIGENDIAN
# ----------------------------------
Gabor Greif's avatar
Gabor Greif committed
714
# Little endian ARM on Linux with some ABIs has big endian word order
715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738
# 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
])


739 740 741
# FP_PROG_CONTEXT_DIFF
# --------------------
# Figure out how to do context diffs. Sets the output variable ContextDiffCmd.
742 743
#
# Note: NeXTStep thinks diff'ing a file against itself is "trouble".
744 745 746 747 748
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
749
for fp_var in '-U 1' '-u1' '-C 1' '-c1'
750 751 752 753 754 755 756 757 758 759 760 761 762
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


763
# FP_COMPUTE_INT(EXPRESSION, VARIABLE, INCLUDES, IF-FAILS)
764
# --------------------------------------------------------
765 766 767
# 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.
768 769 770 771
#
# 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.
772 773 774 775 776 777 778 779 780 781
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],
782
[AS_LITERAL_IF(m4_translit([[$1]], [*], [p]), [],
783
               [AC_FATAL([$0: requires literal arguments])])[]dnl
784 785 786
AC_CHECK_TYPE([$1], [], [], [$3])[]dnl
m4_pushdef([fp_Cache], [AS_TR_SH([fp_cv_alignment_$1])])[]dnl
AC_CACHE_CHECK([alignment of $1], [fp_Cache],
787
[if test "$AS_TR_SH([ac_cv_type_$1])" = yes; then
788
  FP_COMPUTE_INT([offsetof(struct { char c; $1 ty; },ty)],
789
                 [fp_Cache],
790
                 [AC_INCLUDES_DEFAULT([$3])],
791 792
                 [AC_MSG_ERROR([cannot compute alignment ($1)
See `config.log' for more details.], [77])])
793
else
794 795 796 797
  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
798 799 800
])# FP_CHECK_ALIGNMENT


801 802 803 804 805 806 807 808 809 810

# 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


811 812 813 814 815 816 817 818 819 820 821
# 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
822
#
823 824 825 826 827
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?!?
828
case $TargetPlatform in
829 830 831 832 833 834 835 836 837 838 839
    # 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
840
#include <nlist.h>
841 842
struct nlist xYzzY1[] = {{"xYzzY1", 0},{0}};
struct nlist xYzzY2[] = {{"_xYzzY2", 0},{0}};
sof's avatar
sof committed
843 844
#endif

845 846 847
int main(argc, argv)
int argc;
char **argv;
sof's avatar
sof committed
848 849
{
#ifdef HAVE_NLIST_H
850 851 852
    if(nlist(argv[0], xYzzY1) == 0 && xYzzY1[0].n_value != 0)
        exit(1);
    if(nlist(argv[0], xYzzY2) == 0 && xYzzY2[0].n_value != 0)
853
        exit(0);
sof's avatar
sof committed
854 855
#endif
    exit(1);
856
}]])],[fptools_cv_leading_underscore=yes],[fptools_cv_leading_underscore=no],[fptools_cv_leading_underscore=no])
857
;;
858 859 860 861 862
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
863

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

# 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
892 893


sof's avatar
sof committed
894
dnl
895 896
dnl Check for Happy and version.
dnl If there's no installed Happy, we look
897
dnl for a happy source tree and point the build system at that instead.
898 899
dnl If you increase the minimum version requirement, please also update:
dnl https://ghc.haskell.org/trac/ghc/wiki/Building/Preparation/Tools
900
dnl
901
AC_DEFUN([FPTOOLS_HAPPY],
902
[AC_PATH_PROG(HappyCmd,happy,)
903

sof's avatar
sof committed
904
AC_CACHE_CHECK([for version of happy], fptools_cv_happy_version,
sof's avatar
sof committed
905
changequote(, )dnl
906
[if test x"$HappyCmd" != x; then
907
   fptools_cv_happy_version=`"$HappyCmd" -v |
rwbarton's avatar
rwbarton committed
908
              grep 'Happy Version' | sed -e 's/Happy Version \([^ ]*\).*/\1/g'` ;
sof's avatar
sof committed
909
else
sof's avatar
sof committed
910
   fptools_cv_happy_version="";
sof's avatar
sof committed
911
fi;
912
changequote([, ])dnl
913
])
Austin Seipp's avatar
Austin Seipp committed
914
if test ! -f compiler/parser/Parser.hs || test ! -f compiler/cmm/CmmParse.hs
915
then
916 917
    FP_COMPARE_VERSIONS([$fptools_cv_happy_version],[-lt],[1.19.4],
      [AC_MSG_ERROR([Happy version 1.19.4 or later is required to compile GHC.])])[]
918
fi
919
HappyVersion=$fptools_cv_happy_version;
sof's avatar
sof committed
920 921 922
AC_SUBST(HappyVersion)
])

923
dnl
924 925 926
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
927
dnl
928
AC_DEFUN([FPTOOLS_ALEX],
929
[
930
AC_PATH_PROG(AlexCmd,alex,)
931

932 933
AC_CACHE_CHECK([for version of alex], fptools_cv_alex_version,
changequote(, )dnl
934
[if test x"$AlexCmd" != x; then
935
   fptools_cv_alex_version=`"$AlexCmd" -v |
rwbarton's avatar
rwbarton committed
936
              grep 'Alex [Vv]ersion' | sed -e 's/Alex [Vv]ersion \([0-9\.]*\).*/\1/g'` ;
937 938 939 940 941
else
   fptools_cv_alex_version="";
fi;
changequote([, ])dnl
])
942 943
FP_COMPARE_VERSIONS([$fptools_cv_alex_version],[-ge],[3.0],
  [Alex3=YES],[Alex3=NO])
944 945
if test ! -f compiler/cmm/CmmLex.hs || test ! -f compiler/parser/Lexer.hs
then
946 947
    FP_COMPARE_VERSIONS([$fptools_cv_alex_version],[-lt],[3.1.0],
      [AC_MSG_ERROR([Alex version 3.1.0 or later is required to compile GHC.])])[]
948
fi
949 950
AlexVersion=$fptools_cv_alex_version;
AC_SUBST(AlexVersion)
951
AC_SUBST(Alex3)
952 953
])

sof's avatar
sof committed
954

955 956 957 958 959
# 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],
960
[
961
AC_CACHE_CHECK([whether ld understands $1], [fp_cv_$2],
962
[echo 'int foo() { return 0; }' > conftest.c
963
${CC-cc} -c conftest.c
964 965
if ${LdCmd} -r $1 -o conftest2.o conftest.o > /dev/null 2>&1; then
   fp_cv_$2=$1
966
else
967
   fp_cv_$2=
968
fi
969
rm -rf conftest*])
970 971 972 973
$2=$fp_cv_$2
])# FP_PROG_LD_FLAG


974 975 976 977 978 979 980 981
# 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],
982
[echo 'int foo() { return 0; }' > conftest.c
983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998
${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


999 1000 1001 1002
# FP_PROG_LD_IS_GNU
# -----------------
# Sets the output variable LdIsGNULd to YES or NO, depending on whether it is
# GNU ld or not.
1003
AC_DEFUN([FP_PROG_LD_IS_GNU],[
1004
AC_CACHE_CHECK([whether ld is GNU ld], [fp_cv_gnu_ld],
1005 1006
[[if ${LdCmd} --version 2> /dev/null | grep "GNU" > /dev/null 2>&1; then
  fp_cv_gnu_ld=YES
1007
else
1008 1009 1010
  fp_cv_gnu_ld=NO
fi]])
AC_SUBST([LdIsGNULd],["$fp_cv_gnu_ld"])
1011
])# FP_PROG_LD_IS_GNU
1012

sof's avatar
sof committed
1013

1014 1015 1016 1017 1018 1019 1020 1021
# 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],
1022
[echo 'int foo() { return 0; }' > conftest.c
1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038
${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


1039 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
# 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


1071 1072
# FP_PROG_AR
# ----------
1073
# Sets fp_prog_ar to a path to ar. Exits if no ar can be found
1074 1075 1076
# The host normalization on Windows breaks autoconf, it no longer
# thinks that target == host so it never checks the unqualified
# tools for Windows. See #14274.
1077
AC_DEFUN([FP_PROG_AR],
1078
[if test -z "$fp_prog_ar"; then
1079 1080 1081 1082 1083 1084 1085 1086 1087
  if test "$HostOS" = "mingw32"
  then
    AC_PATH_PROG([fp_prog_ar], [ar])
    if test -n "$fp_prog_ar"; then
      fp_prog_ar=$(cygpath -m $fp_prog_ar)
    fi
  else
    AC_CHECK_TARGET_TOOL([fp_prog_ar], [ar])
  fi
1088
fi
1089
if test -z "$fp_prog_ar"; then
1090
  AC_MSG_ERROR([cannot find ar in your PATH, no idea how to make a library])
sof's avatar
sof committed
1091
fi
1092 1093 1094 1095 1096 1097 1098 1099
])# 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
1100 1101
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
1102 1103 1104 1105 1106
  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
1107
AC_SUBST([ArIsGNUAr], [`echo $fp_prog_ar_is_gnu | tr 'a-z' 'A-Z'`])
1108 1109 1110
])# FP_PROG_AR_IS_GNU


1111 1112 1113 1114 1115 1116 1117
# 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
1118
AC_CACHE_CHECK([whether $fp_prog_ar supports @file], [fp_cv_prog_ar_supports_atfile],
1119 1120 1121 1122 1123
[
rm -f conftest*
touch conftest.file
echo conftest.file  > conftest.atfile
echo conftest.file >> conftest.atfile
Ian Lynagh's avatar
Ian Lynagh committed
1124 1125
"$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`
1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136
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

1137 1138 1139
# FP_PROG_AR_ARGS
# ---------------
# Sets fp_prog_ar_args to the arguments for ar and the output variable ArCmd
1140
# to an invocation of ar including these arguments.
1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153
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 $fp_prog_ar_is_gnu = yes; then
  fp_cv_prog_ar_args="q"
else
  touch conftest.dummy
  for fp_var in clqsZ clqs cqs clq cq ; do
     rm -f conftest.a
Ian Lynagh's avatar
Ian Lynagh committed
1154
     if "$fp_prog_ar" $fp_var conftest.a conftest.dummy > /dev/null 2> /dev/null; then
1155 1156 1157 1158 1159 1160
        fp_cv_prog_ar_args=$fp_var
        break
     fi
  done
  rm -f conftest*
  if test -z "$fp_cv_prog_ar_args"; then
Ian Lynagh's avatar
Ian Lynagh committed
1161
    AC_MSG_ERROR([cannot figure out how to use your $fp_prog_ar])
1162 1163 1164
  fi
fi])
fp_prog_ar_args=$fp_cv_prog_ar_args
1165 1166
AC_SUBST([ArCmd], ["$fp_prog_ar"])
AC_SUBST([ArArgs], ["$fp_prog_ar_args"])
1167 1168 1169 1170 1171 1172

])# FP_PROG_AR_ARGS


# FP_PROG_AR_NEEDS_RANLIB
# -----------------------
1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185
# 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 $fp_prog_ar_is_gnu = yes
    then
        fp_cv_prog_ar_needs_ranlib=no
1186
    elif test "$TargetVendor_CPP" = "apple"
1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199
    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

1200 1201 1202 1203 1204 1205 1206 1207 1208 1209
    # 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 "$RANLIB" = ":"
    then
        RANLIB="true"
    fi
1210 1211 1212 1213 1214 1215 1216 1217 1218
    REAL_RANLIB_CMD="$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])
1219 1220 1221
])# FP_PROG_AR_NEEDS_RANLIB


1222
# FP_GCC_VERSION
1223 1224
# -----------
# Extra testing of the result AC_PROG_CC, testing the gcc version no. Sets the
1225
# output variable GccVersion.
1226
AC_DEFUN([FP_GCC_VERSION],
1227
[AC_REQUIRE([AC_PROG_CC])
1228
if test -z "$CC"
1229
then
1230 1231
  AC_MSG_ERROR([gcc is required])
fi
1232
GccLT34=NO
1233
GccLT44=NO
1234
GccLT46=NO
1235
AC_CACHE_CHECK([version of gcc], [fp_cv_gcc_version],
1236
[
1237 1238 1239
    # Be sure only to look at the first occurrence of the "version " string;
    # Some Apple compilers emit multiple messages containing this string.
    fp_cv_gcc_version="`$CC -v 2>&1 | sed -n -e '1,/version /s/.*version [[^0-9]]*\([[0-9.]]*\).*/\1/p'`"
1240 1241 1242 1243 1244 1245
    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)
1246
    FP_COMPARE_VERSIONS([$fp_cv_gcc_version], [-lt], [4.4], GccLT44=YES)
1247
    FP_COMPARE_VERSIONS([$fp_cv_gcc_version], [-lt], [4.6], GccLT46=YES)
1248
])
1249
AC_SUBST([GccVersion], [$fp_cv_gcc_version])
1250
AC_SUBST(GccLT34)
1251
AC_SUBST(GccLT44)
1252
AC_SUBST(GccLT46)
1253
])# FP_GCC_VERSION
1254

1255
dnl Check to see if the C compiler is clang or llvm-gcc
1256
dnl
1257
GccIsClang=NO
1258 1259
AC_DEFUN([FP_CC_LLVM_BACKEND],
[AC_REQUIRE([AC_PROG_CC])
1260
AC_MSG_CHECKING([whether C compiler is clang])
1261
$CC -x c /dev/null -dM -E > conftest.txt 2>&1
1262 1263
if grep "__clang__" conftest.txt >/dev/null 2>&1; then
  AC_SUBST([CC_CLANG_BACKEND], [1])
1264
  AC_SUBST([CC_LLVM_BACKEND], [1])
1265
  GccIsClang=YES
1266 1267 1268
  AC_MSG_RESULT([yes])
else
  AC_MSG_RESULT([no])
1269 1270 1271 1272 1273 1274 1275 1276 1277 1278
  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
1279
fi
1280
AC_SUBST(GccIsClang)
1281

1282 1283 1284
rm -f conftest.txt
])

Ben Gamari's avatar
Ben Gamari committed
1285 1286 1287 1288 1289 1290 1291 1292 1293
# 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
1294 1295
   # 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
1296 1297 1298 1299 1300 1301 1302 1303 1304
       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
1305
dnl Small feature test for perl version. Assumes PerlCmd
1306 1307 1308 1309
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
1310
dnl
1311
AC_DEFUN([FPTOOLS_CHECK_PERL_VERSION],
sof's avatar
sof committed
1312
[$PerlCmd -v >conftest.out 2>&1
1313
   if grep "v5" conftest.out >/dev/null 2>&1; then
1314 1315
      :
   else
1316
      AC_MSG_ERROR([your version of perl probably won't work, try upgrading it.])
1317
   fi
sof's avatar
sof committed
1318 1319
rm -fr conftest*
])
1320

1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335

# 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
1336
[AC_PATH_PROGS([fp_prog_find], [gfind find], find)
1337 1338 1339 1340 1341
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="$fp_prog_find"
sof's avatar
sof committed
1342
else
1343 1344 1345
  # Found a poor WinDoze version of "find", ignore it.
  AC_MSG_WARN([$fp_prog_find looks like a non-*nix find, ignoring it])
  FP_CHECK_PROG([FindCmd], [find], [], [], [$fp_prog_find])
sof's avatar
sof committed
1346
fi
1347 1348 1349 1350
rm -f conftest.txt conftest.out
AC_SUBST([FindCmd])[]dnl
])# FP_PROG_FIND

sof's avatar
sof committed
1351

1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371
# 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


1372 1373 1374 1375 1376 1377 1378
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
1379
AC_DEFUN([FPTOOLS_NOCACHE_CHECK],
1380 1381 1382 1383 1384
[AC_MSG_CHECKING([$1])
 $3
 AC_MSG_RESULT([$][$2])
])

1385 1386 1387
dnl
dnl FPTOOLS_GHC_VERSION(version)
dnl FPTOOLS_GHC_VERSION(major, minor [, patchlevel])
1388
dnl FPTOOLS_GHC_VERSION(version, major, minor, patchlevel)
1389 1390
dnl
dnl Test for version of installed ghc.  Uses $GHC.
1391
dnl [original version pinched from c2hs]
1392
dnl
1393
AC_DEFUN([FPTOOLS_GHC_VERSION],
1394
[FPTOOLS_NOCACHE_CHECK([version of ghc], [fptools_version_of_ghc],
1395
["${WithGhc-ghc}" --version > conftestghc 2>&1
1396
  cat conftestghc >&AS_MESSAGE_LOG_FD
1397 1398
#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'`
1399
  rm -fr conftest*
1400
  if test "[$]fptools_version_of_ghc" = ""
1401
  then
1402 1403 1404 1405 1406 1407 1408
    fptools_version_of_ghc='unknown'
  fi
fptools_version_of_ghc[_major]=`echo [$]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 "[$]fptools_version_of_ghc[_pl]" = ""
1409
then
1410 1411
  fptools_version_of_ghc[_all]="[$]fptools_version_of_ghc[_major].[$]fptools_version_of_ghc[_minor]"
  fptools_version_of_ghc[_pl]="0"
1412
else
1413
  fptools_version_of_ghc[_all]="[$]fptools_version_of_ghc[_major].[$]fptools_version_of_ghc[_minor].[$]fptools_version_of_ghc[_pl]"
1414
fi
1415
#
1416
ifelse($#, [1], [dnl
1417
[$1]="[$]fptools_version_of_ghc[_all]"
1418
], $#, [2], [dnl
1419 1420
[$1]="[$]fptools_version_of_ghc[_major]"
[$2]="[$]fptools_version_of_ghc[_minor]"
1421
], $#, [3], [dnl
1422 1423 1424
[$1]="[$]fptools_version_of_ghc[_major]"
[$2]="[$]fptools_version_of_ghc[_minor]"
[$3]="[$]fptools_version_of_ghc[_pl]"
1425
], $#, [4], [dnl
1426 1427 1428 1429 1430 1431
[$1]="[$]fptools_version_of_ghc[_all]"
[$2]="[$]fptools_version_of_ghc[_major]"
[$3]="[$]fptools_version_of_ghc[_minor]"
[$4]="[$]fptools_version_of_ghc[_pl]"
])
])
1432
])dnl
1433 1434


1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451
# 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

1452 1453 1454
# 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
1455
# WithGhc. Sets the output variable GhcPkgCmd.
1456 1457
AC_DEFUN([FP_PROG_GHC_PKG],
[AC_CACHE_CHECK([for ghc-pkg matching $WithGhc], fp_cv_matching_ghc_pkg,
Ian Lynagh's avatar
Ian Lynagh committed
1458 1459 1460 1461 1462 1463
[
# If we are told to use ghc-stage2, then we're using an in-tree
# compiler. In this case, we just want ghc-pkg, not ghc-pkg-stage2,
# so we sed off -stage[0-9]$. 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.
1464
fp_ghc_pkg_guess=`echo "$WithGhc" | sed -e 's/-stage@<:@0-9@:>@$//' -e 's,ghc\(@<:@^/\\@:>@*\)$,ghc-pkg\1,'`
Ian Lynagh's avatar
Ian Lynagh committed
1465
if "$fp_ghc_pkg_guess" list > /dev/null 2>&1; then
1466
  fp_cv_matching_ghc_pkg=$fp_ghc_pkg_guess
1467
else
Ian Lynagh's avatar
Ian Lynagh committed
1468
  AC_MSG_ERROR([Cannot find matching ghc-pkg])
1469
fi])
Ian Lynagh's avatar
Ian Lynagh committed
1470 1471 1472
GhcPkgCmd=$fp_cv_matching_ghc_pkg
AC_SUBST([GhcPkgCmd])
])# FP_PROG_GHC_PKG
1473

1474

1475 1476 1477 1478 1479 1480 1481 1482 1483
# 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],
1484
[AC_REQUIRE([FP_GCC_VERSION])
1485 1486
AC_CACHE_CHECK([for extra options to pass gcc when compiling via C], [fp_cv_gcc_extra_opts],
[fp_cv_gcc_extra_opts=
1487
 FP_COMPARE_VERSIONS([$fp_cv_gcc_version], [-ge], [3.4],
1488 1489
  [fp_cv_gcc_extra_opts="$fp_cv_gcc_extra_opts -fwrapv"],
  [])
1490 1491 1492
 FP_COMPARE_VERSIONS([$fp_cv_gcc_version], [-ge], [4.0],
  [fp_cv_gcc_extra_opts="$fp_cv_gcc_extra_opts -fno-builtin"],
  [])
1493 1494 1495
])
AC_SUBST([GccExtraViaCOpts],$fp_cv_gcc_extra_opts)
])
1496

1497

1498 1499 1500
# FP_SETUP_PROJECT_VERSION
# ---------------------
AC_DEFUN([FP_SETUP_PROJECT_VERSION],
1501 1502 1503
[
if test "$RELEASE" = "NO"; then
    AC_MSG_CHECKING([for GHC version date])
1504 1505
    if test -f VERSION_DATE; then
        PACKAGE_VERSION=${PACKAGE_VERSION}.`cat VERSION_DATE`
Ian Lynagh's avatar
Ian Lynagh committed
1506
        AC_MSG_RESULT(given $PACKAGE_VERSION)
1507 1508
    elif test -d .git; then
        changequote(, )dnl
1509 1510
        ver_posixtime=`git log -1 --pretty=format:%ct`
        ver_date=`perl -MPOSIX -e "print strftime('%Y%m%d', gmtime($ver_posixtime));"`
1511 1512
        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
1513
                AC_MSG_ERROR([failed to detect version date: check that git and perl are in your path])
1514 1515 1516
        fi
        PACKAGE_VERSION=${PACKAGE_VERSION}.$ver_date
        AC_MSG_RESULT(inferred $PACKAGE_VERSION)