configure.ac 40.9 KB
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dnl == autoconf source for the Glasgow FP tools ==
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dnl (run "grep '^dnl \*' configure.ac | sed -e 's/dnl / /g; s/\*\*/   +/g;'"
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dnl  (or some such) to see the outline of this file)
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dnl
#
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# (c) The University of Glasgow 1994-2004
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#
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# Configure script template for GHC
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#
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# Process with 'autoreconf' to get a working configure script.
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#
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# For the generated configure script, do "./configure --help" to
# see what flags are available. (Better yet, read the documentation!)
#

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AC_INIT([The Glorious Glasgow Haskell Compilation System], [6.7], [glasgow-haskell-bugs@haskell.org], [ghc])
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# Set this to YES for a released version, otherwise NO
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: ${RELEASE=NO}
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# The primary version (e.g. 6.7, 6.6.1) is set in the AC_INIT line
# above.  If this is not a released version, then we will append the
# date to the version number (e.g. 6.7.20070204).  The date is
# constructed by finding the date of the most recent patch in the
# darcs repository.  If this is a source distribution (not a darcs
# checkout), then we ship a file 'VERSION' containing the full version
# when the source distribution was created.

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if test ! -f mk/config.h.in; then
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   echo "mk/config.h.in doesn't exist: perhaps you haven't run 'sh boot'?"
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   exit 1
fi

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AC_SUBST([CONFIGURE_ARGS], [$ac_configure_args])

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FP_SETUP_PROJECT_VERSION

# Hmmm, we fix the RPM release number to 1 here... Is this convenient?
AC_SUBST([release], [1])
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# First off, a distrib sanity check..
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AC_CONFIG_SRCDIR([mk/config.mk.in])
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dnl * We require autoconf version 2.52
dnl We need 2.50 due to the use of AC_SYS_LARGEFILE and AC_MSG_NOTICE.
dnl We need 2.52 due to the use of AS_TR_CPP and AS_TR_SH.
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AC_PREREQ([2.52])
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# -------------------------------------------------------------------------
# Prepare to generate the following header files
#
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#
AC_CONFIG_HEADER(mk/config.h)
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# No, semi-sadly, we don't do `--srcdir'...
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if test x"$srcdir" != 'x.' ; then
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    echo "This configuration does not support the \`--srcdir' option.."
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    exit 1
fi

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dnl--------------------------------------------------------------------
dnl * Deal with arguments telling us gmp is somewhere odd
dnl--------------------------------------------------------------------

FP_ARG_GMP

GMP_INCLUDE_DIRS=
GMP_LIB_DIRS=
if test "x$gmp_libraries" != "xNONE"; then
  LDFLAGS="-L$gmp_libraries $LDFLAGS"
  GMP_LIB_DIRS=$gmp_libraries
fi
if test "x$gmp_includes" != "xNONE"; then
  CPPFLAGS="-I$gmp_includes $CPPFLAGS"
  GMP_INCLUDE_DIRS=$gmp_includes
fi
AC_SUBST(GMP_INCLUDE_DIRS)
AC_SUBST(GMP_LIB_DIRS)

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dnl--------------------------------------------------------------------
dnl * Choose host(/target/build) platform
dnl--------------------------------------------------------------------

dnl Guess host/target/build platform(s) if necessary.
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AC_CANONICAL_TARGET
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# "$host" defaults to "$target"
if test "x$host" = xNONE ; then
    host=$target
fi

dnl ** canonicalize platform names
BuildPlatform=`/bin/sh $srcdir/config.sub $build` || exit 1
HostPlatform=`/bin/sh $srcdir/config.sub $host` || exit 1
TargetPlatform=`/bin/sh $srcdir/config.sub $target` || exit 1

if test x"$TargetPlatform" != x"$HostPlatform" ; then
    echo "GHC configuration does not support differing host/target (i.e., cross-compiling)"
    exit 1
fi
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exeext=''
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#
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# The following will be more difficult when we *are* cross-compiling.
# Suitable names to slam in *_CPP are in platform.h.in.
# We also record the architecture, vendor, and operating system (OS)
# separately.
case $HostPlatform in
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alpha*-dec-osf[[12]]*)
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        HostPlatform=alpha-dec-osf1   # canonicalise for our purposes
        TargetPlatform=alpha-dec-osf1 # this will work for now... (hack)
        BuildPlatform=alpha-dec-osf1  # hack
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        HostPlatform_CPP='alpha_dec_osf1'
        HostArch_CPP='alpha'
        HostVendor_CPP='dec'
        HostOS_CPP='osf1'
        ;;
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alpha*-dec-osf[[345]]*)
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        HostPlatform=alpha-dec-osf3   # canonicalise for our purposes
        TargetPlatform=alpha-dec-osf3 # this will work for now... (hack)
        BuildPlatform=alpha-dec-osf3  # hack
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        HostPlatform_CPP='alpha_dec_osf3'
        HostArch_CPP='alpha'
        HostVendor_CPP='dec'
        HostOS_CPP='osf3'
        ;;
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alpha*-unknown-linux*)
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        HostPlatform=alpha-unknown-linux
        TargetPlatform=alpha-unknown-linux
        BuildPlatform=alpha-unknown-linux
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        HostPlatform_CPP='alpha_unknown_linux'
        HostArch_CPP='alpha'
        HostVendor_CPP='unknown'
        HostOS_CPP='linux'
        ;;
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alpha*-unknown-freebsd*)
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        HostPlatform=alpha-unknown-freebsd
        TargetPlatform=alpha-unknown-freebsd
        BuildPlatform=alpha-unknown-freebsd
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        HostPlatform_CPP='alpha_unknown_freebsd'
        HostArch_CPP='alpha'
        HostVendor_CPP='unknown'
        HostOS_CPP='freebsd'
        ;;
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alpha*-unknown-openbsd*)
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        HostPlatform=alpha-unknown-openbsd
        TargetPlatform=alpha-unknown-openbsd
        BuildPlatform=alpha-unknown-openbsd
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        HostPlatform_CPP='alpha_unknown_openbsd'
        HostArch_CPP='alpha'
        HostVendor_CPP='unknown'
        HostOS_CPP='openbsd'
        ;;
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amd64-*-openbsd*|x86_64-*-openbsd*)
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        HostPlatform=x86_64-unknown-openbsd
        TargetPlatform=x86_64-unknown-openbsd
        BuildPlatform=x86_64-unknown-openbsd
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        HostPlatform_CPP='x86_64_unknown_openbsd'
        HostArch_CPP='x86_64'
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        HostVendor_CPP='unknown'
        HostOS_CPP='openbsd'
        ;;
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amd64-*-freebsd*)
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        HostPlatform=x86_64-unknown-freebsd
        TargetPlatform=x86_64-unknown-freebsd
        BuildPlatform=x86_64-unknown-freebsd
        HostPlatform_CPP='x86_64_unknown_freebsd'
        HostArch_CPP='x86_64'
        HostVendor_CPP='unknown'
        HostOS_CPP='freebsd'
        ;;
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arm*-linux*)
        HostPlatform=arm-unknown-linux # hack again
        TargetPlatform=arm-unknown-linux
        BuildPlatform=arm-unknown-linux
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        HostPlatform_CPP='arm_unknown_linux'
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        HostArch_CPP='arm'
        HostVendor_CPP='unknown'
        HostOS_CPP='linux'
        ;;
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arm*-openbsd*)
        HostPlatform=arm-unknown-openbsd
        TargetPlatform=arm-unknown-openbsd
        BuildPlatform=arm-unknown-openbsd
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        HostPlatform_CPP='arm_unknown_openbsd'
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        HostArch_CPP='arm'
        HostVendor_CPP='unknown'
        HostOS_CPP='openbsd'
        ;;
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hppa*-*-linux*)
        HostPlatform=hppa-unknown-linux # hack again
        TargetPlatform=hppa-unknown-linux
        BuildPlatform=hppa-unknown-linux
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        HostPlatform_CPP='hppa_unknown_linux'
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        HostArch_CPP='hppa'
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        HostVendor_CPP='unknown'
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        HostOS_CPP='linux'
        ;;
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hppa*-*-openbsd*)
        HostPlatform=hppa-unknown-openbsd # hack again
        TargetPlatform=hppa-unknown-openbsd
        BuildPlatform=hppa-unknown-openbsd
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        HostPlatform_CPP='hppa_unknown_openbsd'
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        HostArch_CPP='hppa'
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        HostVendor_CPP='unknown'
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        HostOS_CPP='openbsd'
        ;;
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hppa1.1-hp-hpux*)
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        HostPlatform=hppa1.1-hp-hpux  # canonicalise for our purposes (hack)
        TargetPlatform=hppa1.1-hp-hpux
        BuildPlatform=hppa1.1-hp-hpux
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        HostPlatform_CPP='hppa1_1_hp_hpux'
        HostArch_CPP='hppa1_1'
        HostVendor_CPP='hp'
        HostOS_CPP='hpux'
        ;;
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i[[3456]]86-*-linuxaout*)
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        HostPlatform=i386-unknown-linuxaout   # hack again
        TargetPlatform=i386-unknown-linuxaout
        BuildPlatform=i386-unknown-linuxaout
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        HostPlatform_CPP='i386_unknown_linuxaout'
        HostArch_CPP='i386'
        HostVendor_CPP='unknown'
        HostOS_CPP='linuxaout'
        ;;
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i[[3456]]86-*-linux*)
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        HostPlatform=i386-unknown-linux # hack again
        TargetPlatform=i386-unknown-linux
        BuildPlatform=i386-unknown-linux
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        HostPlatform_CPP='i386_unknown_linux'
        HostArch_CPP='i386'
        HostVendor_CPP='unknown'
        HostOS_CPP='linux'
        ;;
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i[[3456]]86-*-kfreebsd*-gnu)
        HostPlatform=i386-unknown-kfreebsdgnu # hack again
        TargetPlatform=i386-unknown-kfreebsdgnu
        BuildPlatform=i386-unknown-kfreebsdgnu
        HostPlatform_CPP='i386_unknown_kfreebsdgnu'
        HostArch_CPP='i386'
        HostVendor_CPP='unknown'
        HostOS_CPP='kfreebsdgnu'
        ;;
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i[[3456]]86-*-freebsd[[3-9]]*) # FreeBSD 3.0+ uses ELF
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        HostPlatform=i386-unknown-freebsd # hack again
        TargetPlatform=i386-unknown-freebsd
        BuildPlatform=i386-unknown-freebsd
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        HostPlatform_CPP='i386_unknown_freebsd'
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        HostArch_CPP='i386'
        HostVendor_CPP='unknown'
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        HostOS_CPP='freebsd'
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        ;;
i[[3456]]86-*-freebsd2*) # Older FreeBSDs are a.out
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        HostPlatform=i386-unknown-freebsd2 # hack again
        TargetPlatform=i386-unknown-freebsd2
        BuildPlatform=i386-unknown-freebsd2
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        HostPlatform_CPP='i386_unknown_freebsd2'
        HostArch_CPP='i386'
        HostVendor_CPP='unknown'
        HostOS_CPP='freebsd2'
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        ;;
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i[[3456]]86-*-netbsd*)
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        HostPlatform=i386-unknown-netbsd # hack again
        TargetPlatform=i386-unknown-netbsd
        BuildPlatform=i386-unknown-netbsd
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        HostPlatform_CPP='i386_unknown_netbsd'
        HostArch_CPP='i386'
        HostVendor_CPP='unknown'
        HostOS_CPP='netbsd'
        ;;
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i[[3456]]86-*-openbsd*)
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        HostPlatform=i386-unknown-openbsd # hack again
        TargetPlatform=i386-unknown-openbsd
        BuildPlatform=i386-unknown-openbsd
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        HostPlatform_CPP='i386_unknown_openbsd'
        HostArch_CPP='i386'
        HostVendor_CPP='unknown'
        HostOS_CPP='openbsd'
        ;;
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i[[3456]]86-*-solaris2*)
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        HostPlatform=i386-unknown-solaris2 # hack again
        TargetPlatform=i386-unknown-solaris2
        BuildPlatform=i386-unknown-solaris2
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        HostPlatform_CPP='i386_unknown_solaris2'
        HostArch_CPP='i386'
        HostVendor_CPP='unknown'
        HostOS_CPP='solaris2'
        ;;
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i[[3456]]86-*-cygwin*)
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        HostPlatform=i386-unknown-cygwin32 # hack again
        TargetPlatform=i386-unknown-cygwin32
        BuildPlatform=i386-unknown-cygwin32
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        HostPlatform_CPP='i386_unknown_cygwin32'
        HostArch_CPP='i386'
        HostVendor_CPP='unknown'
        HostOS_CPP='cygwin32'
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        exeext='.exe'
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        ;;
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i[[3456]]86-*-mingw32*)
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        HostPlatform=i386-unknown-mingw32 # hack again
        TargetPlatform=i386-unknown-mingw32
        BuildPlatform=i386-unknown-mingw32
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        HostPlatform_CPP='i386_unknown_mingw32'
        HostArch_CPP='i386'
        HostVendor_CPP='unknown'
        HostOS_CPP='mingw32'
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        exeext='.exe'
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        ;;
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i[[3456]]86-apple-darwin*)
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        HostPlatform=i386-apple-darwin
        TargetPlatform=i386-apple-darwin #hack
        BuildPlatform=i386-apple-darwin #hack
        HostPlatform_CPP='i386_apple_darwin'
        HostArch_CPP='i386'
        HostVendor_CPP='apple'
        HostOS_CPP='darwin'
        ;;
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i[[3456]]86-*-gnu*)
        HostPlatform=i386-unknown-gnu
        TargetPlatform=i386-unknown-gnu
        BuildPlatform=i386-unknown-gnu
        HostPlatform_CPP=i386_unknown_gnu
        HostArch_CPP=i386
        HostVendor_CPP=unknown
        HostOS_CPP=gnu
        ;;
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ia64-*-linux*)
        HostPlatform=ia64-unknown-linux # hack again
        TargetPlatform=ia64-unknown-linux
        BuildPlatform=ia64-unknown-linux
        HostPlatform_CPP='ia64_unknown_linux'
        HostArch_CPP='ia64'
        HostVendor_CPP='unknown'
        HostOS_CPP='linux'
        ;;
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x86_64-*-linux*)
        HostPlatform=x86_64-unknown-linux
        TargetPlatform=x86_64-unknown-linux
        BuildPlatform=x86_64-unknown-linux
        HostPlatform_CPP='x86_64_unknown_linux'
        HostArch_CPP='x86_64'
        HostVendor_CPP='unknown'
        HostOS_CPP='linux'
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        ;;
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x86_64-apple-darwin*)
        HostPlatform=x86_64-apple-darwin
        TargetPlatform=x86_64-apple-darwin
        BuildPlatform=x86_64-apple-darwin
        HostPlatform_CPP='x86_64_apple_darwin'
        HostArch_CPP='x86_64'
        HostVendor_CPP='apple'
        HostOS_CPP='darwin'
        ;;
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m68k-*-linux*)
        HostPlatform=m68k-unknown-linux # hack again
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        TargetPlatform=m68k-unknown-linux
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        BuildPlatform=m68k-unknown-linux
        HostPlatform_CPP='m68k_unknown_linux'
        HostArch_CPP='m68k'
        HostVendor_CPP='unknown'
        HostOS_CPP='linux'
        ;;
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m68k-next-nextstep2)
        HostPlatform_CPP='m68k_next_nextstep2'
        HostArch_CPP='m68k'
        HostVendor_CPP='next'
        HostOS_CPP='nextstep2'
        ;;
m68k-next-nextstep3)
        HostPlatform_CPP='m68k_next_nextstep3'
        HostArch_CPP='m68k'
        HostVendor_CPP='next'
        HostOS_CPP='nextstep3'
        ;;
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i[[3456]]86-next-nextstep3)
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        HostPlatform=i386-next-nextstep3 # hack again
        TargetPlatform=i386-next-nextstep3
        BuildPlatform=i386-next-nextstep3
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        HostPlatform_CPP='i386_next_nextstep3'
        HostArch_CPP='i386'
        HostVendor_CPP='next'
        HostOS_CPP='nextstep3'
        ;;
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m68k-*-openbsd*)
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        HostPlatform=m68k-unknown-openbsd
        TargetPlatform=m68k-unknown-openbsd
        BuildPlatform=m68k-unknown-openbsd
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        HostPlatform_CPP='m68k_unknown_openbsd'
        HostArch_CPP='m68k'
        HostVendor_CPP='unknown'
        HostOS_CPP='openbsd'
        ;;
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m68k-*-netbsd*)
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        HostPlatform=m68k-unknown-netbsd
        TargetPlatform=m68k-unknown-netbsd
        BuildPlatform=m68k-unknown-netbsd
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        HostPlatform_CPP='m68k_unknown_netbsd'
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        HostArch_CPP='m68k'
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        HostVendor_CPP='unknown'
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        HostOS_CPP='netbsd'
        ;;
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m68k-sun-sunos4*)
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        HostPlatform=m68k-sun-sunos4
        TargetPlatform=m68k-sun-sunos4 #hack
        BuildPlatform=m68k-sun-sunos4 #hack
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        HostPlatform_CPP='m68k_sun_sunos4'
        HostArch_CPP='m68k'
        HostVendor_CPP='sun'
        HostOS_CPP='sunos4'
        ;;
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m88k-*-openbsd*)
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        HostPlatform=m88k-unknown-openbsd
        TargetPlatform=m88k-unknown-openbsd
        BuildPlatform=m88k-unknown-openbsd
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        HostPlatform_CPP='m88k_unknown_openbsd'
        HostArch_CPP='m88k'
        HostVendor_CPP='unknown'
        HostOS_CPP='openbsd'
        ;;
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mips-*-linux*)
        HostPlatform=mips-unknown-linux # hack again
        TargetPlatform=mips-unknown-linux
        BuildPlatform=mips-unknown-linux
        HostPlatform_CPP='mips_unknown_linux'
        HostArch_CPP='mips'
        HostVendor_CPP='unknown'
        HostOS_CPP='linux'
        ;;
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mipsel-*-linux*)
        HostPlatform=mipsel-unknown-linux # hack again
        TargetPlatform=mipsel-unknown-linux
        BuildPlatform=mipsel-unknown-linux
        HostPlatform_CPP='mipsel_unknown_linux'
        HostArch_CPP='mipsel'
        HostVendor_CPP='unknown'
        HostOS_CPP='linux'
        ;;
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mips-dec-ultrix*)
        HostPlatform_CPP='mips_dec_ultrix'
        HostArch_CPP='mipsel'   # NB a little different
        HostVendor_CPP='dec'
        HostOS_CPP='ultrix'
        ;;
mips-sgi-irix*)
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        HostPlatform=mips-sgi-irix
        TargetPlatform=mips-sgi-irix #hack
        BuildPlatform=mips-sgi-irix #hack
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        HostPlatform_CPP='mips_sgi_irix'
        HostArch_CPP='mipseb'   # NB a little different
        HostVendor_CPP='sgi'
        HostOS_CPP='irix'
        ;;
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rs6000-ibm-aix*)
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        HostPlatform=rs6000-ibm-aix
        TargetPlatform=rs6000-ibm-aix #hack
        BuildPlatform=rs6000-ibm-aix #hack
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        HostPlatform_CPP='rs6000_ibm_aix'
        HostArch_CPP='rs6000'
        HostVendor_CPP='ibm'
        HostOS_CPP='aix'
        ;;
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powerpc-ibm-aix*)
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        HostPlatform=powerpc-ibm-aix
        TargetPlatform=powerpc-ibm-aix #hack
        BuildPlatform=powerpc-ibm-aix #hack
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        HostPlatform_CPP='powerpc_ibm_aix'
        HostArch_CPP='powerpc'
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        HostVendor_CPP='ibm'
        HostOS_CPP='aix'
        ;;
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powerpc-apple-darwin*)
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        HostPlatform=powerpc-apple-darwin
        TargetPlatform=powerpc-apple-darwin #hack
        BuildPlatform=powerpc-apple-darwin #hack
        HostPlatform_CPP='powerpc_apple_darwin'
        HostArch_CPP='powerpc'
        HostVendor_CPP='apple'
        HostOS_CPP='darwin'
        ;;
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powerpc-unknown-linux*)
        HostPlatform=powerpc-unknown-linux
        TargetPlatform=powerpc-unknown-linux
        BuildPlatform=powerpc-unknown-linux
        HostPlatform_CPP='powerpc_unknown_linux'
        HostArch_CPP='powerpc'
        HostVendor_CPP='unknown'
        HostOS_CPP='linux'
        ;;
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powerpc-unknown-openbsd*)
        HostPlatform=powerpc-unknown-openbsd
        TargetPlatform=powerpc-unknown-openbsd
        BuildPlatform=powerpc-unknown-openbsd
        HostPlatform_CPP='powerpc_unknown_openbsd'
        HostArch_CPP='powerpc'
        HostVendor_CPP='unknown'
        HostOS_CPP='openbsd'
        ;;
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powerpc64-unknown-linux*)
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        HostPlatform=powerpc64-unknown-linux
        TargetPlatform=powerpc64-unknown-linux
        BuildPlatform=powerpc64-unknown-linux
        HostPlatform_CPP='powerpc64_unknown_linux'
        HostArch_CPP='powerpc64'
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        HostVendor_CPP='unknown'
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        HostOS_CPP='linux'
        ;;

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s390-ibm-linux*)
       HostPlatform=s390-ibm-linux
       TargetPlatform=s390-ibm-linux #hack
       BuildPlatform=s390-ibm-linux #hack
        HostPlatform_CPP='s390_ibm_linux'
        HostArch_CPP='s390'
        HostVendor_CPP='ibm'
        HostOS_CPP='linux'
        ;;
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sparc-sun-sunos4*)
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        HostPlatform=sparc-sun-sunos4
        TargetPlatform=sparc-sun-sunos4 #hack
        BuildPlatform=sparc-sun-sunos4 #hack
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        HostPlatform_CPP='sparc_sun_sunos4'
        HostArch_CPP='sparc'
        HostVendor_CPP='sun'
        HostOS_CPP='sunos4'
        ;;
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        HostPlatform=sparc-sun-solaris2
        TargetPlatform=sparc-sun-solaris2 #hack
        BuildPlatform=sparc-sun-solaris2 #hack
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        HostPlatform_CPP='sparc_sun_solaris2'
        HostArch_CPP='sparc'
        HostVendor_CPP='sun'
        HostOS_CPP='solaris2'
        ;;
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sparc*-linux*)
        HostPlatform=sparc-unknown-linux
        TargetPlatform=sparc-unknown-linux
        BuildPlatform=sparc-unknown-linux
        HostPlatform_CPP='sparc_unknown_linux'
        HostArch_CPP='sparc'
        HostVendor_CPP='unknown'
        HostOS_CPP='linux'
        ;;
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sparc-*-openbsd*)
        HostPlatform=sparc-unknown-openbsd
        TargetPlatform=sparc-unknown-openbsd
        BuildPlatform=sparc-unknown-openbsd
        HostPlatform_CPP='sparc_unknown_openbsd'
        HostArch_CPP='sparc'
        HostVendor_CPP='unknown'
        HostOS_CPP='openbsd'
        ;;
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sparc64-*-openbsd*)
        HostPlatform=sparc64-unknown-openbsd
        TargetPlatform=sparc64-unknown-openbsd
        BuildPlatform=sparc64-unknown-openbsd
        HostPlatform_CPP='sparc64_unknown_openbsd'
        HostArch_CPP='sparc64'
        HostVendor_CPP='unknown'
        HostOS_CPP='openbsd'
        ;;
vax-*-openbsd*)
        HostPlatform=vax-unknown-openbsd
        TargetPlatform=vax-unknown-openbsd
        BuildPlatform=vax-unknown-openbsd
        HostPlatform_CPP='vax_unknown_openbsd'
        HostArch_CPP='vax'
        HostVendor_CPP='unknown'
        HostOS_CPP='openbsd'
        ;;
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*)
        echo "Unrecognised platform: $HostPlatform"
        exit 1
        ;;
esac
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echo "Canonicalised to: $HostPlatform"
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test  x"$HostPlatform" != x"$TargetPlatform" && echo "Target platform set to $TargetPlatform"
test  x"$BuildPlatform" != x"$HostPlatform"  && echo "Build platform set to $BuildPlatform"
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BuildPlatform_CPP=$HostPlatform_CPP
TargetPlatform_CPP=$HostPlatform_CPP
BuildArch_CPP=$HostArch_CPP
TargetArch_CPP=$HostArch_CPP
BuildOS_CPP=$HostOS_CPP
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HostOS_Full=$host_os
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TargetOS_CPP=$HostOS_CPP
BuildVendor_CPP=$HostVendor_CPP
TargetVendor_CPP=$HostVendor_CPP
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AC_SUBST(HostPlatform_CPP)
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AC_SUBST(BuildPlatform_CPP)
AC_SUBST(TargetPlatform_CPP)
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AC_SUBST(HostArch_CPP)
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AC_SUBST(BuildArch_CPP)
AC_SUBST(TargetArch_CPP)
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AC_SUBST(HostOS_CPP)
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AC_SUBST(HostOS_Full)
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AC_SUBST(BuildOS_CPP)
AC_SUBST(TargetOS_CPP)
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AC_SUBST(HostVendor_CPP)
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AC_SUBST(BuildVendor_CPP)
AC_SUBST(TargetVendor_CPP)
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AC_SUBST(exeext)

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dnl --------------------------------------------------------------
dnl * Calculate absolute path to build tree
dnl --------------------------------------------------------------

AC_MSG_CHECKING(for path to top of build tree)

hardtop=`pwd`

dnl Remove common automounter nonsense
dnl
hardtop=`echo $hardtop | sed 's|^/tmp_mnt.*\(/local/.*\)$|\1|' | sed 's|^/tmp_mnt/|/|' | sed 's|^//\(.\)/|\1:/|' `

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dnl Find 'hardtop_plat', the native format for 'hardtop'
dnl (i.e., right kind of \dnl slashes on a Win32 box, but with b-slashes
dnl being escaped).
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dnl
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dnl Note OSTYPE: On Cygwin we need to use 'cygpath' to convert
dnl              /cygdrive/c/foo to c:/foo but we must not do that if we
dnl              aren't building using Cygwin (notably msys), because
dnl              cygpath doesn't exist.  It seems that 'bash' sets
dnl              OSTYPE to 'cygwin' or 'msys' respectively, but cygwin's
dnl              'sh' does not.  So we hackily assume that if the shell
dnl              hasn't set it to 'msys' then we must be in Cygwin.
dnl              Sigh.
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dnl
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dnl              The Right Thing is probably to test $BuildPlatform
dnl              instead, but we are sloppy about setting that correctly
dnl              at the moment, so we just work around for now.
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dnl
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dnl              The quotes round "$(OSTYPE)" are essential, for the
dnl              Cygwin-sh case where OSTYPE is not set.
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case $HostPlatform in
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  i386-unknown-mingw32 | i386-unknown-cygwin32)
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        if test "${OSTYPE}" != "msys"
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          then
            # convert $hardtop to a path that mingw will understand too
            cyghardtop=${hardtop}
            hardtop=`cygpath -w ${cyghardtop} | sed -e 's@\\\\@/@g'`
            hardtop_plat=`cygpath -w ${cyghardtop} | sed -e 's@\\\\@\\\\\\\\@g'`
          else
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dnl OK, so we're in the MSYS case.  hardtop looks like /c/....
dnl We want to make hardtop_plat into c:/...
dnl Stop using [] for quotes temporarily, so we can use [] in the sed regexp
changequote(, )dnl
               hardtop_plat=`echo ${hardtop} | sed -e 's@^/\\([a-zA-Z]\\)/@\\1:/@g'`
changequote([, ])dnl
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        fi
        ;;
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  *)
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        hardtop_plat=${hardtop}
        ;;
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esac
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AC_SUBST(hardtop)
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AC_SUBST(hardtop_plat)

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AC_MSG_RESULT(${hardtop})

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# We don't support building in directories with spaces.
case "$hardtop" in
  *' '*) AC_MSG_ERROR([
   The build system does not support building in a directory containing
   space characters.  Suggestion: move the build tree somewhere else.])
 ;;
esac

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dnl --------------------------------------------------------------
dnl * Project specific configuration options
dnl --------------------------------------------------------------
dnl What follows is a bunch of options that can either be configured
dnl through command line options to the configure script or by
dnl supplying defns in the build tree's mk/build.mk. Having the option to
dnl use either is considered a Feature.

dnl ** What command to use to compile compiler sources ?
dnl --------------------------------------------------------------
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AC_ARG_WITH([ghc],
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[AC_HELP_STRING([--with-ghc=ARG],
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  [Use ARG as the path to GHC  [default=autodetect]])],
  [WithGhc="$withval"],
  [if test "$GHC" = ""; then
    AC_PATH_PROG([GHC], [ghc])
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  fi
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  WithGhc="$GHC"])
AC_SUBST([WithGhc])
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AC_ARG_WITH(hc,
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[AC_HELP_STRING([--with-hc=ARG],
        [Use ARG as the path to the compiler for compiling ordinary
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         Haskell code  (default= value of --with-ghc)])],
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[WithHc="$withval"],
[WithHc=$WithGhc]
)
AC_SUBST(WithHc)

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if test "$WithGhc" != ""; then
  FPTOOLS_GHC_VERSION([GhcVersion], [GhcMajVersion], [GhcMinVersion], [GhcPatchLevel])dnl
  AC_SUBST(GhcVersion)dnl
  AC_SUBST(GhcMajVersion)dnl
  AC_SUBST(GhcMinVersion)dnl
  AC_SUBST(GhcPatchLevel)dnl
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  GhcMinVersion2=`echo "$GhcMinVersion" | sed 's/^\\(.\\)$/0\\1/'`
  GhcCanonVersion="$GhcMajVersion$GhcMinVersion2"
  if test $GhcCanonVersion -ge 601; then ghc_ge_601=YES; else ghc_ge_601=NO; fi
  if test $GhcCanonVersion -ge 602; then ghc_ge_602=YES; else ghc_ge_602=NO; fi
  if test $GhcCanonVersion -ge 603; then ghc_ge_603=YES; else ghc_ge_603=NO; fi
  if test $GhcCanonVersion -ge 605; then ghc_ge_605=YES; else ghc_ge_605=NO; fi
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  AC_SUBST(ghc_ge_601)dnl
  AC_SUBST(ghc_ge_602)dnl
  AC_SUBST(ghc_ge_603)dnl
  AC_SUBST(ghc_ge_605)dnl
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fi

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# Check whether this GHC has readline installed
FP_GHC_HAS_READLINE

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AC_PATH_PROGS(NHC,nhc nhc98)
AC_PATH_PROG(HBC,hbc)

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dnl ** Which gcc to use?
dnl --------------------------------------------------------------
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AC_ARG_WITH(gcc,
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[AC_HELP_STRING([--with-gcc=ARG],
        [Use ARG as the path to GCC  [default=autodetect]])],
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[WhatGccIsCalled="$withval"
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 if test "x$HostPlatform" = "xi386-unknown-mingw32"
    then
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       if test "${OSTYPE}" != "msys"
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         then
         # Canonicalise to <drive>:/path/to/gcc
         withval=`cygpath -w ${withval} | sed -e 's@\\\\@/@g' `
       fi
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 fi;
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 CC="$withval"
 export CC
 ],
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[WhatGccIsCalled="gcc"]
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)
AC_SUBST(WhatGccIsCalled)

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dnl ** Which ld to use?
dnl --------------------------------------------------------------
AC_ARG_WITH(ld,
[AC_HELP_STRING([--with-ld=ARG],
        [Use ARG as the path to LD  [default=autodetect]])],
[if test "x$HostPlatform" = "xi386-unknown-mingw32"
    then
       if test "${OSTYPE}" != "msys"
         then
         # Canonicalise to <drive>:/path/to/ld
         withval=`cygpath -w ${withval} | sed -e 's@\\\\@/@g' `
       fi
 fi;
 LD=$withval
 FP_PROG_LD([$LD])
 ],
 [FP_PROG_LD()]
)

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dnl ** Booting from .hc files?
dnl --------------------------------------------------------------
AC_ARG_ENABLE(hc-boot,
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[AC_HELP_STRING([--enable-hc-boot],
[Boot the Glasgow Haskell Compiler from intermediate .hc files.
 (This option is mostly of interest to porters.) [default=no]])],
[ if test x"$enableval" = x"yes"; then
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        BootingFromHc=YES
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  else
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        BootingFromHc=NO
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  fi
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],
[BootingFromHc=NO]
)
AC_SUBST(BootingFromHc)

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dnl ** Booting from unregisterised .hc files?
dnl --------------------------------------------------------------
AC_ARG_ENABLE(hc-boot-unregisterised,
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[AC_HELP_STRING([--enable-hc-boot-unregisterised],
[ With --enable-hc-boot, treat the intermediate .hc files as
 unregisterised rather than registerised code.
 (This option is mostly of interest to porters.) [default=no]])],
[ if test x"$enableval" = x"yes"; then
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        BootingFromUnregisterisedHc=YES
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  else
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        BootingFromUnregisterisedHc=NO
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  fi
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],
[BootingFromUnregisterisedHc=NO]
)
AC_SUBST(BootingFromUnregisterisedHc)

if test "$BootingFromHc" = "NO"; then
if test "$BootingFromUnregisterisedHc" = "YES"; then
AC_MSG_ERROR([--enable-hc-boot-unregisterised requires --enable-hc-boot.])
fi;
fi;

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dnl ** Must have GHC to build GHC, unless --enable-hc-boot is on
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AC_MSG_ERROR([GHC is required unless bootstrapping from .hc files.])
fi;
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dnl ** Enable the construction of Win32 DLLs?
dnl --------------------------------------------------------------
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dnl
dnl [ The ability to build the RTS and libraries as separate DLLs used
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dnl   to be supported, but isn't currently (updates to the RTS, compiler
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dnl   and build system would be required to bring it back again.)
dnl   Hence, exposing it as an option is false advertisement, so better
dnl   disable it to avoid confusion (but leave it commented-out rather
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dnl   than removed in order to remind ourselves to bring back the
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dnl   feature at some stage.) ]
dnl
dnl AC_ARG_ENABLE(win32-dlls,
dnl [  --enable-win32-dlls
dnl         If on a Win32 platform running mingw32/cygwin, enable the
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dnl         construction of DLLs containing ghc-compiled code.
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dnl ],
dnl [
dnl case $HostOS_CPP in
dnl cygwin32) ;;
dnl mingw32)  ;;
dnl *)    echo "Unrecognised win32 platform: $HostPlatform"
dnl       exit 1
dnl       ;;
dnl esac
dnl EnableWin32DLLs=YES
dnl ],
dnl [EnableWin32DLLs=NO]
dnl )
dnl AC_SUBST(EnableWin32DLLs)
dnl if test x"$EnableWin32DLLs" = "xYES" ; then
dnl  AC_DEFINE(HAVE_WIN32_DLL_SUPPORT)
dnl fi
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dnl ** Enable the building of the ObjectIO?
dnl --------------------------------------------------------------
AC_ARG_ENABLE(objectio,
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[AC_HELP_STRING([--enable-objectio],
[Build ObjectIO, a portable GUI library for Haskell. [default=no]])],
[ if test x"$enableval" = x"yes"; then
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        GhcLibsWithObjectIO=YES
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  else
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        GhcLibsWithObjectIO=NO
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  fi
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],
[GhcLibsWithObjectIO=NO]
)
AC_SUBST(GhcLibsWithObjectIO)

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dnl ** .NET interop support?
dnl --------------------------------------------------------------
AC_ARG_ENABLE(dotnet,
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[AC_HELP_STRING([--enable-dotnet],
[Build .NET interop layer. [default=no]])],
[ if test x"$enableval" = x"yes"; then
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        DotnetSupport=YES; AC_DEFINE([WANT_DOTNET_SUPPORT], [1], [Define to 1 if you want to include .NET interop support.])
  else
        DotnetSupport=NO
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  fi],
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[DotnetSupport=NO]
)
AC_SUBST(DotnetSupport)

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dnl --------------------------------------------------------------
dnl End of configure script option section
dnl --------------------------------------------------------------


dnl --------------------------------------------------------------
dnl * General configuration checks
dnl --------------------------------------------------------------
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dnl ** Can the unix package be built?
dnl --------------------------------------------------------------

if test x"$TargetPlatform" = x"i386-unknown-mingw32"; then
   GhcLibsWithUnix=NO
else
   GhcLibsWithUnix=YES
fi
AC_SUBST([GhcLibsWithUnix])

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dnl ** does #! work?
AC_SYS_INTERPRETER()
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dnl ** look for `perl', but only in /bin on Windows
case $HostOS_CPP in
cygwin32|mingw32)
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      AC_CHECK_PROG(PerlCmd,perl,/bin/perl,,/bin)
      if test -z "$PerlCmd"; then
         echo "You must install the version of Perl shipped with GHC"
         echo "(or a compatible one) in /bin."
         exit 1
      fi
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   ;;
*)
   AC_PATH_PROG(PerlCmd,perl)
   if test -z "$PerlCmd"; then
      echo "You must install perl before you can continue"
      echo "Perhaps it is already installed, but not in your PATH?"
      exit 1
   else
   FPTOOLS_CHECK_PERL_VERSION
   fi
   ;;
esac
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dnl ** does #! path/to/perl work? (sometimes it's too long...)
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FPTOOLS_SHEBANG_PERL
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dnl ** check for Python
AC_PATH_PROG(PythonCmd,python)

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dnl ** look for GCC and find out which version
dnl     Figure out which C compiler to use.  Gcc is preferred.
dnl     If gcc, make sure it's at least 2.1
dnl
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FP_HAVE_GCC
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FP_MINGW_GCC
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FP_GCC_NEEDS_NO_OMIT_LFPTR
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FP_GCC_HAS_NO_UNIT_AT_A_TIME
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FP_GCC_HAS_WRAPV
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dnl ** figure out how to invoke cpp directly (gcc -E is no good)
AC_PROG_CPP
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dnl ** Without optimization some INLINE trickery fails for GHCi
SRC_CC_OPTS="-O"

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dnl ** Try to add -mno-cygwin to the C compiler options
FP_CHECK_FLAG([-mno-cygwin], [
SRC_CC_OPTS="-mno-cygwin $SRC_CC_OPTS"
CPPFLAGS="-mno-cygwin $CPPFLAGS"])
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AC_SUBST(SRC_CC_OPTS)
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dnl ** figure out how to do context diffs
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FP_PROG_CONTEXT_DIFF
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dnl ** Find find command (for Win32's benefit)
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FP_PROG_FIND
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dnl ** Find sort command (for the benefit of Win32 environs)
FP_PROG_SORT

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dnl ** figure out how to do a BSD-ish install
AC_PROG_INSTALL
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dnl Let's make sure install-sh is executable here.  If we got it from
dnl a darcs repo, it might not be (see bug #978).
chmod +x install-sh
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dnl If you can run configure, you certainly have /bin/sh
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AC_DEFINE([HAVE_BIN_SH], [1], [Define to 1 if you have /bin/sh.])
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dnl ** how to invoke `ar' and `ranlib'
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FP_PROG_AR_NEEDS_RANLIB
FP_PROG_AR_SUPPORTS_INPUT
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dnl ** Check to see whether ln -s works
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AC_PROG_LN_S

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dnl ** Find the path to sed
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AC_PATH_PROG(SedCmd,sed)

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dnl ** check for time command
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AC_PATH_PROG(TimeCmd,time)

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dnl ** check for tar
dnl   if GNU tar is named gtar, look for it first.
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AC_PATH_PROGS(TarCmd,gtar tar,tar)
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dnl ** check for DocBook toolchain
FP_CHECK_DOCBOOK_DTD
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FP_DIR_DOCBOOK_XSL([/usr/share/xml/docbook/stylesheet/nwalsh/current /usr/share/xml/docbook/stylesheet/nwalsh /usr/share/sgml/docbook/docbook-xsl-stylesheets* /usr/share/sgml/docbook/xsl-stylesheets* /opt/kde?/share/apps/ksgmltools2/docbook/xsl /usr/share/docbook-xsl /usr/share/sgml/docbkxsl /usr/local/share/xsl/docbook /sw/share/xml/xsl/docbook-xsl /opt/local/share/xsl/docbook-xsl])
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FP_PROG_FO_PROCESSOR

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dnl ** check for ghc-pkg command
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FP_PROG_GHC_PKG
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AC_ARG_WITH(greencard,
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[AC_HELP_STRING([--with-greencard=ARG],
        [Use ARG as the path to greencard  [default=autodetct]])],
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[
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GreenCardCmd=$withval;
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FPTOOLS_GREENCARD(3.00)
]
)

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dnl ** check for installed happy binary + version
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dnl    (don't do it if we're booting from .hc files though.)
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if test "$BootingFromHc" = "NO"; then
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FPTOOLS_HAPPY
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fi;
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dnl ** check for installed haddock
FPTOOLS_HADDOCK

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dnl ** check for installed alex binary + version
dnl    (don't do it if we're booting from .hc files though.)
if test "$BootingFromHc" = "NO"; then
FPTOOLS_ALEX
fi;

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dnl --------------------------------------------------
dnl ### program checking section ends here ###
dnl --------------------------------------------------
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dnl --------------------------------------------------
dnl * Platform header file and syscall feature tests
dnl ### checking the state of the local header files and syscalls ###
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dnl ** check for full ANSI header (.h) files
AC_HEADER_STDC
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dnl ** Enable large file support.  NB. do this before testing the type of
dnl    off_t, because it will affect the result of that test.
AC_SYS_LARGEFILE

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dnl ** check for specific header (.h) files that we are interested in
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AC_CHECK_HEADERS([bfd.h ctype.h dirent.h dlfcn.h errno.h fcntl.h grp.h limits.h locale.h nlist.h pthread.h pwd.h signal.h sys/mman.h sys/resource.h sys/time.h sys/timeb.h sys/timers.h sys/times.h sys/utsname.h sys/wait.h termios.h time.h utime.h windows.h winsock.h])
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AC_CHECK_HEADER([readline/readline.h], [HaveReadlineReadlineH=YES], [HaveReadlineReadlineH=NO])
AC_CHECK_HEADER([readline/history.h], [HaveReadlineHistoryH=YES], [HaveReadlineHistoryH=NO])
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if test $HaveReadlineReadlineH = YES && test $HaveReadlineHistoryH = YES ; then
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  GhcLibsWithReadline=YES
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  AC_DEFINE([HAVE_READLINE_HEADERS], [1], [Define to 1 if readline/readline.h and readline/history.h exist.])
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else
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  GhcLibsWithReadline=NO
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  AC_DEFINE([HAVE_READLINE_HEADERS], [0], [Define to 1 if readline/readline.h and readline/history.h exist.])
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fi
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AC_SUBST(GhcLibsWithReadline)
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dnl ** check if it is safe to include both <time.h> and <sys/time.h>
AC_HEADER_TIME
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dnl ** do we have long longs?
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AC_CHECK_TYPES([long long])
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dnl ** what are the sizes of various types
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AC_CHECK_SIZEOF(char,               1)
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AC_CHECK_SIZEOF(double,             8)
AC_CHECK_SIZEOF(float,              4)
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AC_CHECK_SIZEOF(int,                4)
AC_CHECK_SIZEOF(long,               4)
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if test "$ac_cv_type_long_long" = yes; then
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AC_CHECK_SIZEOF(long long,          8)
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fi
AC_CHECK_SIZEOF(short,              2)
AC_CHECK_SIZEOF(unsigned char,      1)
AC_CHECK_SIZEOF(unsigned int,       4)
AC_CHECK_SIZEOF(unsigned long,      4)
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if test "$ac_cv_type_long_long" = yes; then
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AC_CHECK_SIZEOF(unsigned long long, 8)
fi
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AC_CHECK_SIZEOF(unsigned short,     2)
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AC_CHECK_SIZEOF(void *,             4)
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dnl ** what are alignment constraints on various types
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FP_CHECK_ALIGNMENT(char)
FP_CHECK_ALIGNMENT(double)
FP_CHECK_ALIGNMENT(float)
FP_CHECK_ALIGNMENT(int)
FP_CHECK_ALIGNMENT(long)
if test "$ac_cv_type_long_long" = yes; then
FP_CHECK_ALIGNMENT(long long)
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fi
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FP_CHECK_ALIGNMENT(short)
FP_CHECK_ALIGNMENT(unsigned char)
FP_CHECK_ALIGNMENT(unsigned int)
FP_CHECK_ALIGNMENT(unsigned long)
if test "$ac_cv_type_long_long" = yes; then
FP_CHECK_ALIGNMENT(unsigned long long)
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fi
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FP_CHECK_ALIGNMENT(unsigned short)
FP_CHECK_ALIGNMENT(void *)
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FP_CHECK_FUNC([WinExec],
  [@%:@include <windows.h>], [WinExec("",0)])
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FP_CHECK_FUNC([GetModuleFileName],
  [@%:@include <windows.h>], [GetModuleFileName((HMODULE)0,(LPTSTR)0,0)])
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dnl ** check return type of signal handlers
dnl Foo: assumes we can use prototypes.
dnl On BCC, signal handlers have type "int(void)", elsewhere its "void(int)".
dnl AC_CACHE_CHECK([type of signal handlers], ac_cv_type_signal_handler,
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dnl [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h>
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dnl #include <signal.h>
dnl #ifdef signal
dnl #undef signal
dnl #endif
dnl void (*signal (int, void (*)(int)))(int);
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dnl ]],
dnl [[int i;]])],
dnl [ac_cv_type_signal_handler=void_int],
dnl [ac_cv_type_signal_handler=int_void])])
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dnl if test "$ac_cv_type_signal_handler" = void_int; then
dnl AC_DEFINE(VOID_INT_SIGNALS)
dnl fi

dnl On BCC, signal handlers have type "int(void)", elsewhere its "void(int)".
AC_TYPE_SIGNAL
if test "$ac_cv_type_signal" = void; then
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  AC_DEFINE([VOID_INT_SIGNALS], [1], [Define to 1 if signal handlers have type void (*)(int). Otherwise, they're assumed to have type int (*)(void).])
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fi

dnl ** check for more functions
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dnl ** The following have been verified to be used in ghc/, but might be used somewhere else, too.
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AC_CHECK_FUNCS([getclock getrusage gettimeofday setitimer siginterrupt sysconf times ctime_r])
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dnl ** For ghc/rts/gmp:
AC_CHECK_FUNCS([getpagesize])
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dnl ** check whether this machine has gmp3 installed
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AC_CHECK_LIB(gmp,  __gmpz_fdiv_qr, HaveLibGmp=YES; LibGmp=gmp,
  AC_CHECK_LIB(gmp3, __gmpz_fdiv_qr,  HaveLibGmp=YES; LibGmp=gmp3,
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    HaveLibGmp=NO; LibGmp=not-installed))
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AC_SUBST(HaveLibGmp)
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AC_SUBST(LibGmp)
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dnl ** (Mac OS X only: check for GMP.framework)
HaveFrameworkGMP=NO
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case $HostPlatform in
*-apple-darwin)
    AC_MSG_CHECKING([for GMP.framework])
    save_libs="$LIBS"
    LIBS="-framework GMP"
    AC_TRY_LINK_FUNC(__gmpz_fdiv_qr, HaveFrameworkGMP=YES,)
    if test $HaveFrameworkGMP = YES; then
      AC_DEFINE([HAVE_FRAMEWORK_GMP], [1], [Define to 1 if GMP.framework is installed (Mac OS X only).])
    fi;
    LIBS="$save_libs"
    AC_MSG_RESULT([$HaveFrameworkGMP])
    ;;
esac
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AC_SUBST(HaveFrameworkGMP)
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dnl ** check for mingwex library
AC_CHECK_LIB(mingwex, closedir, HaveLibMingwEx=YES, HaveLibMingwEx=NO)
AC_SUBST(HaveLibMingwEx)

if test $HaveLibMingwEx = YES ; then
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fi

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if test "$HaveLibGmp" = "NO"; then
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if test "$HostArch_CPP" = "ia64" -o "$HostArch_CPP" = "mipseb" ; then
AC_MSG_ERROR([You need to install libgmp (the in-tree version does not work on IA64 or mips64).])
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fi;
fi;

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dnl ** check whether this machine has BFD and liberty installed (used for debugging)
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dnl    the order of these tests matters: bfd needs liberty
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AC_CHECK_LIB(iberty, xmalloc)
AC_CHECK_LIB(bfd,    bfd_init)
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dnl ** check for math library
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AC_CHECK_FUNC(atan,[fp_libm_not_needed=yes;LIBM=],[fp_libm_not_needed=dunno])
if test x"$fp_libm_not_needed" = xdunno; then
   AC_CHECK_LIB([m], [atan], [LIBS="-lm $LIBS"; LIBM="-lm"],[LIBM=])
fi
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AC_SUBST([LIBM])
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dnl ################################################################
dnl Check for libraries
dnl ################################################################

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dnl ** check whether we need -ldl to get dlopen()
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AC_CHECK_LIB(dl, dlopen,
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    [HaveLibDL=YES
     AC_DEFINE([HAVE_LIBDL], [1], [Define to 1 if you need -ldl to get dlopen().])
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     LIBS="$LIBS -ldl"],
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    [HaveLibDL=NO])
AC_SUBST(HaveLibDL)

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dnl --------------------------------------------------
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dnl * Miscellaneous feature tests
dnl --------------------------------------------------

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dnl ** can we get alloca?
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AC_FUNC_ALLOCA
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dnl ** Working vfork?
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AC_FUNC_FORK
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dnl ** determine whether or not const works
AC_C_CONST
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dnl ** are we big endian?
AC_C_BIGENDIAN
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FPTOOLS_FLOAT_WORD_ORDER_BIGENDIAN
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dnl ** check for leading underscores in symbol names
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FP_LEADING_UNDERSCORE
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dnl ** check for ld, whether it has an -x option, and if it is GNU ld
FP_PROG_LD_X
FP_PROG_LD_IS_GNU
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dnl ** check for Apple-style dead-stripping support
dnl    (.subsections-via-symbols assembler directive)


AC_MSG_CHECKING(for .subsections_via_symbols)
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AC_COMPILE_IFELSE(
    [AC_LANG_PROGRAM([], [__asm__ (".subsections_via_symbols");])],
    [AC_MSG_RESULT(yes)
     AC_DEFINE([HAVE_SUBSECTIONS_VIA_SYMBOLS],[1],
               [Define to 1 if Apple-style dead-stripping is supported.])
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    ],
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    [AC_MSG_RESULT(no)])
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dnl *** check for GNU non-executable stack note support (ELF only)
dnl     (.section .note.GNU-stack,"",@progbits)

AC_MSG_CHECKING(for GNU non-executable stack support)
AC_COMPILE_IFELSE(
    [AC_LANG_PROGRAM([__asm__ (".section .note.GNU-stack,\"\",@progbits");], [0])],
    [AC_MSG_RESULT(yes)
     AC_DEFINE([HAVE_GNU_NONEXEC_STACK],[1],
               [Define to 1 if GNU non-executable stack notes are supported.])
    ],
    [AC_MSG_RESULT(no)])

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dnl ** check for librt
AC_CHECK_LIB(rt, clock_gettime)
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AC_CHECK_FUNCS(clock_gettime timer_create timer_settime)
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FP_CHECK_TIMER_CREATE
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dnl ** check for Apple's "interesting" long double compatibility scheme
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AC_MSG_CHECKING(for printf\$LDBLStub)
AC_TRY_LINK_FUNC(printf\$LDBLStub,
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    [
        AC_MSG_RESULT(yes)
        AC_DEFINE([HAVE_PRINTF_LDBLSTUB],[1],
            [Define to 1 if we have printf$LDBLStub (Apple Mac OS >= 10.4, PPC).])
    ],
    [
        AC_MSG_RESULT(no)
        AC_DEFINE([HAVE_PRINTF_LDBLSTUB],[0],
            [Define to 1 if we have printf$LDBLStub (Apple Mac OS >= 10.4, PPC).])
    ])

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# test for GTK+
AC_PATH_PROGS([GTK_CONFIG], [pkg-config])
if test -n "$GTK_CONFIG"; then
  if $GTK_CONFIG gtk+-2.0 --atleast-version=2.0; then
    GTK_CONFIG="$GTK_CONFIG gtk+-2.0"
  else
    AC_MSG_WARN([GTK+ not usable, need at least version 2.0])
    GTK_CONFIG=
  fi
fi
AC_SUBST([GTK_CONFIG])
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#Checking for PAPI
AC_CHECK_LIB(papi, PAPI_library_init, HavePapiLib=YES, HavePapiLib=NO)
AC_CHECK_HEADER([papi.h], [HavePapiHeader=YES], [HavePapiHeader=NO])
AC_SUBST(HavePapiLib)
AC_SUBST(HavePapiHeader)

if test "$HavePapiLib" = "YES" -a "$HavePapiHeader" = "YES"; then
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   HavePapi=YES
else
   HavePapi=NO
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fi