configure.ac 44.9 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 AQUA Project, Glasgow University, 1994-1998
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#
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# Configure script template for the Glasgow functional programming tools
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#
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# Process with 'autoconf' 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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# First off, a distrib sanity check..
AC_INIT(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.
AC_PREREQ(2.52)
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dnl * Declare subdirectories that have a private configure script
dnl
dnl After the toplevel configuration is complete, the script will recurse into
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dnl these subdirectories if they exist. The use of a cache file makes repeated
dnl checks cheap.
AC_CONFIG_SUBDIRS([ghc libraries])
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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 * Choose host(/target/build) platform
dnl--------------------------------------------------------------------

dnl Guess host/target/build platform(s) if necessary.
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AC_CANONICAL_SYSTEM
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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
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	TargetPlatform=alpha-dec-osf1 # this will work for now... (hack)
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	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
        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
        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
        HostPlatform_CPP='alpha_unknown_freebsd'
        HostArch_CPP='alpha'
        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
        HostPlatform_CPP='arm_unknown_linux'                 
        HostArch_CPP='arm'
        HostVendor_CPP='unknown'
        HostOS_CPP='linux'
        ;;
hppa*-*-linux*)
        HostPlatform=hppa-unknown-linux # hack again
        TargetPlatform=hppa-unknown-linux
        BuildPlatform=hppa-unknown-linux
        HostPlatform_CPP='hppa_unknown_linux'                
        HostArch_CPP='hppa'
        HostVendor_CPP='unknown'                             
        HostOS_CPP='linux'
        ;;
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hppa1.1-hp-hpux*)
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	HostPlatform=hppa1.1-hp-hpux  # canonicalise for our purposes (hack)
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	TargetPlatform=hppa1.1-hp-hpux
	BuildPlatform=hppa1.1-hp-hpux
        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
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	TargetPlatform=i386-unknown-linuxaout
	BuildPlatform=i386-unknown-linuxaout
        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
        HostPlatform_CPP='i386_unknown_linux'
        HostArch_CPP='i386'
        HostVendor_CPP='unknown'
        HostOS_CPP='linux'
        ;;
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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
        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
	HostPlatform=i386-unknown-freebsd2 # hack again
	TargetPlatform=i386-unknown-freebsd2
	BuildPlatform=i386-unknown-freebsd2
        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*)
	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*)
	HostPlatform=i386-unknown-openbsd # hack again
	TargetPlatform=i386-unknown-openbsd
	BuildPlatform=i386-unknown-openbsd
        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
        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
        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*)
	HostPlatform=i386-unknown-mingw32 # hack again
	TargetPlatform=i386-unknown-mingw32
	BuildPlatform=i386-unknown-mingw32
        HostPlatform_CPP='i386_unknown_mingw32'
        HostArch_CPP='i386'
        HostVendor_CPP='unknown'
        HostOS_CPP='mingw32'
	exeext='.exe'
        ;;
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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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m68k-*-linux*)
        HostPlatform=m68k-unknown-linux # hack again
        TargetPlatform=m68k-unknown-linux                    
        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
        HostPlatform_CPP='i386_next_nextstep3'
        HostArch_CPP='i386'
        HostVendor_CPP='next'
        HostOS_CPP='nextstep3'
        ;;
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m68k-*-openbsd*)
	HostPlatform=m68k-unknown-openbsd
	TargetPlatform=m68k-unknown-openbsd
	BuildPlatform=m68k-unknown-openbsd
        HostPlatform_CPP='m68k_unknown_openbsd'
        HostArch_CPP='m68k'
        HostVendor_CPP='unknown'
        HostOS_CPP='openbsd'
        ;;
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m68k-*-netbsd*)
	HostPlatform=m68k-unknown-netbsd
	TargetPlatform=m68k-unknown-netbsd
	BuildPlatform=m68k-unknown-netbsd
        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*)
	HostPlatform=m68k-sun-sunos4
	TargetPlatform=m68k-sun-sunos4 #hack
	BuildPlatform=m68k-sun-sunos4 #hack
        HostPlatform_CPP='m68k_sun_sunos4'
        HostArch_CPP='m68k'
        HostVendor_CPP='sun'
        HostOS_CPP='sunos4'
        ;;
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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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mips-dec-ultrix*)
        HostPlatform_CPP='mips_dec_ultrix'
        HostArch_CPP='mipsel'   # NB a little different
        HostVendor_CPP='dec'
        HostOS_CPP='ultrix'
        ;;
mips-sgi-irix*)
	HostPlatform=mips-sgi-irix
	TargetPlatform=mips-sgi-irix #hack
	BuildPlatform=mips-sgi-irix #hack
        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*)
	HostPlatform=rs6000-ibm-aix
	TargetPlatform=rs6000-ibm-aix #hack
	BuildPlatform=rs6000-ibm-aix #hack
        HostPlatform_CPP='rs6000_ibm_aix'
        HostArch_CPP='rs6000'
        HostVendor_CPP='ibm'
        HostOS_CPP='aix'
        ;;
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powerpc-ibm-aix*)
	HostPlatform=powerpc-ibm-aix
	TargetPlatform=powerpc-ibm-aix #hack
	BuildPlatform=powerpc-ibm-aix #hack
        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*)
	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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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*)
	HostPlatform=sparc-sun-sunos4
	TargetPlatform=sparc-sun-sunos4 #hack
	BuildPlatform=sparc-sun-sunos4 #hack
        HostPlatform_CPP='sparc_sun_sunos4'
        HostArch_CPP='sparc'
        HostVendor_CPP='sun'
        HostOS_CPP='sunos4'
        ;;
sparc-sun-solaris2*)
	HostPlatform=sparc-sun-solaris2
	TargetPlatform=sparc-sun-solaris2 #hack
	BuildPlatform=sparc-sun-solaris2 #hack
        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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*)
        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(BuildPlatform)
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AC_SUBST(HostPlatform)
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AC_SUBST(TargetPlatform)
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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:/|' `

dnl Find 'hardtop_plat', the native format for 'hardtop' (i.e., right kind of \dnl slashes on a Win32 box, but with b-slashes being escaped).
dnl
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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" 
          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 ${cyghardtop} | sed -e 's@\\\\@\\\\\\\\@g'`
          else
            hardtop_plat=${hardtop}
        fi
        ;;
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  *)
  	hardtop_plat=${hardtop}
	;;
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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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],
	[Use ARG as the path to GHC  [default=autodetect]])],
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[ WithGhc="$withval" ],
[ 
  if test "$GHC" = ""; then
    AC_PATH_PROG(GHC,ghc)
  fi
  WithGhc=$GHC
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])
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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
	 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
fi

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
       if test ${OSTYPE} != "msys"
         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"],
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[WhatGccIsCalled="gcc"]
)
AC_SUBST(WhatGccIsCalled)

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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
	BootingFromHc=YES
  else
	BootingFromHc=NO
  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
	BootingFromUnregisterisedHc=YES
  else
	BootingFromUnregisterisedHc=NO
  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
if test "$BootingFromHc" = "NO" -a "$WithGhc" = "" -a -d "$srcdir/ghc"; then
AC_MSG_ERROR([GHC is required unless bootstrapping from .hc files.])
fi;
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dnl ** --enable-threaded-rts (not used any more)
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dnl --------------------------------------------------------------
AC_ARG_ENABLE(threaded-rts,
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[AC_HELP_STRING([--enable-threaded-rts],
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[DEPRECATED (backwards compatibility only). [default=no]])],
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[ if test x"$enableval" = x"yes"; then
	ThreadedRts=YES
  else
	ThreadedRts=NO
  fi
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],
[ThreadedRts=NO]
)
AC_SUBST(ThreadedRts)

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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
dnl   to be supported, but isn't currently (updates to the RTS, compiler 
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
dnl   than removed in order to remind ourselves to bring back the 
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
dnl 	construction of DLLs containing ghc-compiled code.
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
	GhcLibsWithObjectIO=YES
  else
	GhcLibsWithObjectIO=NO
  fi
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],
[GhcLibsWithObjectIO=NO]
)
AC_SUBST(GhcLibsWithObjectIO)

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dnl ** Enable the building of the OpenAL binding?
dnl --------------------------------------------------------------
AC_ARG_ENABLE([openal],
  AC_HELP_STRING([--enable-openal],
                 [Build OpenAL binding [[default=autodetect]]]),
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  [ if test x"$enableval" = x"yes"; then
	GhcLibsWithOpenAL=YES
    else
	GhcLibsWithOpenAL=NO
    fi
  ],
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  [GhcLibsWithOpenAL=yes])

AC_SUBST([GhcLibsWithOpenAL])

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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
	DotnetSupport=YES; AC_DEFINE([WANT_DOTNET_SUPPORT], [1], [Define to 1 if you want to include .NET interop support.])
  else 
	DotnetSupport=NO
  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
AC_PROG_CC
FPTOOLS_HAVE_GCC
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FPTOOLS_GCC_NEEDS_NO_OMIT_LFPTR
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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 ** figure out how to do a BSD-ish install
AC_PROG_INSTALL
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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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FPTOOLS_PROG_AR_AND_RANLIB
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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 jade/openjade & determine a working catalog
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AC_PATH_PROGS(JadeCmd,openjade jade,jade)
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FPTOOLS_DOCBOOK_CATALOG(Catalog, $JadeCmd, docs/fptools-both.dsl, 
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                        /etc/sgml/catalog /etc/sgml.catalog /usr/share/sgml/CATALOG.docbkdsl /usr/local/share/sgml/catalog glafp-utils/docbook/CATALOG*)
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if test -z "$Catalog"; then
  AC_MSG_RESULT([Warning: You will not be able to build the documentation.])
fi
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case $Catalog in
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   yes) # assume it is provided by other means (e.g., SGML_CATALOG_FILES env var).
        Catalog=
   	;;
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   glafp*) 
	case $HostOS_CPP in
	   mingw32)
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	          if test ${OSTYPE} == "msys"
	            then
	              Catalog=$hardtop/$Catalog
	            else
	              Catalog=`cygpath -w $hardtop/$Catalog`
	          fi
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	      ;;
	   *) Catalog=$hardtop/$Catalog
	      ;;
	esac
   ;;
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esac   
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AC_SUBST(Catalog)
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dnl ** check for ghc-pkg command
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changequote(, )dnl
ghc_pkg_guess=`echo $WithGhc | sed 's@ghc\([^/\\]*\)$@ghc-pkg\1@'`
changequote([, ])dnl
if $ghc_pkg_guess -l >/dev/null 2>/dev/null; then
   GhcPkgCmd=$ghc_pkg_guess
   AC_MSG_NOTICE([using $ghc_pkg_guess for ghc-pkg])
else
   AC_PATH_PROG(GhcPkgCmd,ghc-pkg)
fi
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AC_ARG_WITH(greencard,
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[AC_HELP_STRING([--with-greencard=ARG],
        [Use ARG as the path to greencard  [default=autodetct]])],
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[
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GreenCardCmd=$withval;
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FPTOOLS_GREENCARD(3.00)
]
)

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AC_ARG_ENABLE(src-tree-happy,
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[AC_HELP_STRING([--enable-src-tree-happy],
	[Build and use source tree (fptools/happy) version of Happy. 
	 [default=autodetect]])],
[ if test x"$enableval" = x"yes"; then
	UseSrcTreeHappy=YES
  else
	UseSrcTreeHappy=NO
  fi
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],
[UseSrcTreeHappy=NO]
)
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dnl ** check for installed happy binary + version
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dnl    (don't do it if we're booting from .hc files though.)
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if test "$BootingFromHc" = "NO"; then
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FPTOOLS_HAPPY
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fi;
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AC_ARG_ENABLE(src-tree-haddock,
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[AC_HELP_STRING([--enable-src-tree-haddock],
        [Build and use source tree (fptools/haddock) version of Haddock.
	 [default=autodetect]])],
[ if test x"$enableval" = x"yes"; then
	UseSrcTreeHaddock=YES
  else
	UseSrcTreeHaddock=NO
  fi
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],
[UseSrcTreeHaddock=NO]
)
dnl ** check for installed haddock
FPTOOLS_HADDOCK

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AC_ARG_ENABLE(src-tree-alex,
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[AC_HELP_STRING([--enable-src-tree-alex],
        [Build and use source tree (fptools/alex) version of Alex.
	 [default=autodetect]])],
[ if test x"$enableval" = x"yes"; then
	UseSrcTreeAlex=YES
  else
	UseSrcTreeAlex=NO
  fi
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],
[UseSrcTreeAlex=NO]
)
dnl ** check for installed alex binary + version
dnl    (don't do it if we're booting from .hc files though.)
if test "$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(Files.h arpa/inet.h assert.h console.h ctype.h dirent.h errno.h fcntl.h float.h ftw.h grp.h ieee754.h inttypes.h limits.h locale.h malloc.h memory.h nlist.h pascal.h pwd.h sgtty.h siginfo.h signal.h stat.h stdint.h stdlib.h stddef.h stdarg.h string.h sys/fault.h sys/file.h sys/ioctl.h sys/limits.h sys/mman.h sys/param.h sys/procfs.h sys/resource.h sys/signal.h sys/socket.h netdb.h netinet/in.h netinet/tcp.h sys/stat.h sys/syscall.h sys/time.h sys/timeb.h sys/timers.h sys/times.h sys/types.h sys/un.h sys/utsname.h sys/vadvise.h sys/wait.h termio.h termios.h time.h types.h unistd.h utime.h values.h bfd.h winsock.h pthread.h sys/uio.h)
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AC_CHECK_HEADER(unistd.h,[AC_CHECK_FUNCS(lchown)])
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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 for DOS include files
AC_CHECK_HEADERS(dos.h conio.h io.h std.h) 

dnl ** check for Windows include files
AC_CHECK_HEADERS(windows.h)
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dnl ** check for OpenGL/GLUT include paths and libraries
FP_CHECK_GLUT

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if test x"$no_GLU" = xyes; then
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  GhcLibsWithOpenGL=NO
else
  GhcLibsWithOpenGL=YES
fi
AC_SUBST([GhcLibsWithOpenGL])

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if test x"$no_GLUT" = xyes; then
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  GhcLibsWithGLUT=NO
else
  GhcLibsWithGLUT=YES
fi
AC_SUBST([GhcLibsWithGLUT])

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fp_save_cppflags="$CPPFLAGS"
CPPFLAGS="$CPPFLAGS $X_CFLAGS"
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if test x"$use_quartz_opengl" = xyes; then
  AC_CHECK_HEADERS([OpenGL/gl.h])
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else
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  AC_CHECK_HEADERS([GL/gl.h])
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fi
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CPPFLAGS="$fp_save_cppflags"
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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 dynamic loading include files
AC_CHECK_HEADERS(dlfcn.h dl.h) 

dnl ** check for farcalloc (in bcc)
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AC_CHECK_HEADER(alloc.h,[AC_CHECK_FUNCS(farcalloc)])
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dnl ** check for valloc (in sunos, solaris, mips, amiga, next, minix, ultrix)
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AC_CHECK_HEADER(malloc.h,[AC_CHECK_FUNCS(valloc)])
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dnl ** check for POSIX regex
HavePosixRegex=NO
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AC_CHECK_HEADERS(regex.h,[AC_CHECK_FUNC(regcomp, [HavePosixRegex=YES])])
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AC_SUBST(HavePosixRegex)

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dnl ** how do we get a timezone name, and UTC offset ?
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AC_STRUCT_TIMEZONE
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dnl ** do we have altzone?
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FP_DECL_ALTZONE
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dnl ** does struct stat contain st_blksize?
AC_STRUCT_ST_BLKSIZE

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dnl ** do we have long longs?
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AC_CHECK_TYPES([long long])
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dnl ** check what fields struct msghdr contains
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AC_CHECK_HEADERS([sys/types.h sys/socket.h sys/uio.h])
AC_CHECK_MEMBERS([struct msghdr.msg_control, struct msghdr.msg_accrights], [], [], [#if HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#if HAVE_SYS_SOCKET_H
# include <sys/socket.h>
#endif
#if HAVE_SYS_UIO_H
# include <sys/uio.h>
#endif])
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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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dnl ** map standard C types and ISO types to Haskell types
FPTOOLS_CHECK_HTYPE(char)
FPTOOLS_CHECK_HTYPE(signed char)
FPTOOLS_CHECK_HTYPE(unsigned char)
FPTOOLS_CHECK_HTYPE(short)
FPTOOLS_CHECK_HTYPE(unsigned short)
FPTOOLS_CHECK_HTYPE(int)
FPTOOLS_CHECK_HTYPE(unsigned int)
FPTOOLS_CHECK_HTYPE(long)
FPTOOLS_CHECK_HTYPE(unsigned long)
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if test "$ac_cv_type_long_long" = yes; then
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FPTOOLS_CHECK_HTYPE(long long)
FPTOOLS_CHECK_HTYPE(unsigned long long)
fi
FPTOOLS_CHECK_HTYPE(float)
FPTOOLS_CHECK_HTYPE(double)
FPTOOLS_CHECK_HTYPE(ptrdiff_t)
FPTOOLS_CHECK_HTYPE(size_t)
FPTOOLS_CHECK_HTYPE(wchar_t)
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dnl Int32 is a HACK for non-ISO C compilers
FPTOOLS_CHECK_HTYPE(sig_atomic_t, Int32)
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FPTOOLS_CHECK_HTYPE(clock_t)
FPTOOLS_CHECK_HTYPE(time_t)
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FPTOOLS_CHECK_HTYPE(dev_t, Word32)
FPTOOLS_CHECK_HTYPE(ino_t)
FPTOOLS_CHECK_HTYPE(mode_t)
FPTOOLS_CHECK_HTYPE(off_t)
FPTOOLS_CHECK_HTYPE(pid_t)
FPTOOLS_CHECK_HTYPE(gid_t)
FPTOOLS_CHECK_HTYPE(uid_t)
FPTOOLS_CHECK_HTYPE(cc_t)
FPTOOLS_CHECK_HTYPE(speed_t)
FPTOOLS_CHECK_HTYPE(tcflag_t)
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FPTOOLS_CHECK_HTYPE(blkcnt_t)
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FPTOOLS_CHECK_HTYPE(nlink_t)
FPTOOLS_CHECK_HTYPE(ssize_t)
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FPTOOLS_CHECK_HTYPE(rlim_t)
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FPTOOLS_CHECK_HTYPE(wint_t)
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dnl ** Map OpenGL data types to Haskell types
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if test $GhcLibsWithOpenGL = YES ; then
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FPTOOLS_CHECK_HTYPE(GLboolean)
FPTOOLS_CHECK_HTYPE(GLbyte)
FPTOOLS_CHECK_HTYPE(GLubyte)
FPTOOLS_CHECK_HTYPE(GLshort)
FPTOOLS_CHECK_HTYPE(GLushort)
FPTOOLS_CHECK_HTYPE(GLint)
FPTOOLS_CHECK_HTYPE(GLuint)
FPTOOLS_CHECK_HTYPE(GLsizei)
FPTOOLS_CHECK_HTYPE(GLenum)
FPTOOLS_CHECK_HTYPE(GLbitfield)
FPTOOLS_CHECK_HTYPE(GLfloat)
FPTOOLS_CHECK_HTYPE(GLclampf)
FPTOOLS_CHECK_HTYPE(GLdouble)
FPTOOLS_CHECK_HTYPE(GLclampd)
fi

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FP_CHECK_CONSTS([E2BIG EACCES EADDRINUSE EADDRNOTAVAIL EADV EAFNOSUPPORT EAGAIN EALREADY EBADF EBADMSG EBADRPC EBUSY ECHILD ECOMM ECONNABORTED ECONNREFUSED ECONNRESET EDEADLK EDESTADDRREQ EDIRTY EDOM EDQUOT EEXIST EFAULT EFBIG EFTYPE EHOSTDOWN EHOSTUNREACH EIDRM EILSEQ EINPROGRESS EINTR EINVAL EIO EISCONN EISDIR ELOOP EMFILE EMLINK EMSGSIZE EMULTIHOP ENAMETOOLONG ENETDOWN ENETRESET ENETUNREACH ENFILE ENOBUFS ENODATA ENODEV ENOENT ENOEXEC ENOLCK ENOLINK ENOMEM ENOMSG ENONET ENOPROTOOPT ENOSPC ENOSR ENOSTR ENOSYS ENOTBLK ENOTCONN ENOTDIR ENOTEMPTY ENOTSOCK ENOTTY ENXIO EOPNOTSUPP EPERM EPFNOSUPPORT EPIPE EPROCLIM EPROCUNAVAIL EPROGMISMATCH EPROGUNAVAIL EPROTO EPROTONOSUPPORT EPROTOTYPE ERANGE EREMCHG EREMOTE EROFS ERPCMISMATCH ERREMOTE ESHUTDOWN ESOCKTNOSUPPORT ESPIPE ESRCH ESRMNT ESTALE ETIME ETIMEDOUT ETOOMANYREFS ETXTBSY EUSERS EWOULDBLOCK EXDEV], [#include <stdio.h>
#include <errno.h>])
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dnl ** can we open files in binary mode?
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FP_CHECK_CONST([O_BINARY], [#include <fcntl.h>], [0])
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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,
dnl [AC_TRY_COMPILE([#include <sys/types.h>
dnl #include <signal.h>
dnl #ifdef signal
dnl #undef signal
dnl #endif
dnl void (*signal (int, void (*)(int)))(int);
dnl ],
dnl [int i;], 
dnl ac_cv_type_signal_handler=void_int,
dnl ac_cv_type_signal_handler=int_void)])
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
AC_CHECK_FUNCS(strcasecmp _stricmp stricmp strcmpi)
AC_CHECK_FUNCS(strcmp)
AC_CHECK_FUNCS(realpath _fullpath)  
AC_CHECK_FUNCS(PBHSetVolSync macsystem)  
AC_CHECK_FUNCS(fgetpos fsetpos fseek ftell)
AC_CHECK_FUNCS(vsnprintf _vsnprintf)
AC_CHECK_FUNCS(snprintf  _snprintf )  
AC_CHECK_FUNCS(popen     _popen )  
AC_CHECK_FUNCS(pclose    _pclose )  
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AC_CHECK_FUNCS(setenv unsetenv)
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dnl ** check for specific library functions that we are interested in
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AC_CHECK_FUNCS(access ftime getclock getpagesize getrusage gettimeofday mktime mprotect readlink setitimer stat lstat siginterrupt symlink sysconf timelocal times vadvise localtime_r gmtime_r readdir_r getgrgid_r getgrnam_r getpwuid_r getpwnam_r)
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dnl ** Solaris2 needs additionl flag for getpw*_r()
case "$TargetPlatform" in
  *-solaris2*)
    unix_SRC_HSC2HS_OPTS="-D_POSIX_PTHREAD_SEMANTICS"
    AC_SUBST(unix_SRC_HSC2HS_OPTS)
  ;;
esac

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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 HaskellSupport.framework)
HaveFrameworkHaskellSupport=NO
if test $HostPlatform = "powerpc-apple-darwin"; then
 AC_MSG_CHECKING([for HaskellSupport.framework])
 save_libs="$LIBS"
 LIBS="-framework HaskellSupport"
 AC_TRY_LINK_FUNC(__gmpz_fdiv_qr, HaveFrameworkHaskellSupport=YES,)
 if test $HaveFrameworkHaskellSupport = YES; then
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  AC_DEFINE([HAVE_FRAMEWORK_HASKELLSUPPORT], [1], [Define to 1 if the HaskellSupport.framework is installed (Mac OS X only).])
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 fi;
 LIBS="$save_libs"
 AC_MSG_RESULT([$HaveFrameworkHaskellSupport])
fi;
AC_SUBST(HaveFrameworkHaskellSupport)

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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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  AC_DEFINE([HAVE_MINGWEX], [1], [Define to 1 if you have the mingwex library.])
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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 wide-char classifications
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dnl FreeBSD has an emtpy wctype.h, so test one of the affected
dnl functions if it's really there.
AC_CHECK_HEADERS(wctype.h,
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  [AC_CHECK_FUNCS(iswspace)]
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)
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dnl ** check for readline, for Hugs and hslibs' Readline
dnl ncurses supersedes termcap and curses, but for compatibility,
dnl we have to check for all...
AC_CHECK_LIB(ncurses, tputs, HaveLibTermcap=YES; LibTermcap=ncurses,
  AC_CHECK_LIB(termcap, tputs, HaveLibTermcap=YES; LibTermcap=termcap,
    AC_CHECK_LIB(curses, tputs, HaveLibTermcap=YES; LibTermcap=curses,
      HaveLibTermcap=NO; LibTermcap=not-installed)))

if test $HaveLibTermcap = YES ; then
  LIBS="-l$LibTermcap $LIBS"
  AC_CHECK_LIB(readline, readline, HaveLibReadline=YES, HaveLibReadline=NO)
fi
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if test $HaveLibTermcap = YES && test x"$HaveLibReadline" = xYES ; then
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  AC_DEFINE([HAVE_READLINE_LIBS], [1], [Define to 1 if readline plus any additional libs needed for it exist.])
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  LibsReadline="readline $LibTermcap"
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else
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  AC_DEFINE([HAVE_READLINE_LIBS], [0], [Define to 1 if readline plus any additional libs needed for it exist.])
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  LibsReadline=
fi
AC_SUBST(LibsReadline)
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if test "$HaveLibReadline"; then
  AC_CHECK_LIB(readline, rl_erase_empty_line,
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    [AC_DEFINE([HAVE_READLINE_4], [1], [Define to 1 if readline has version >= 4.0.])],
    [AC_DEFINE([HAVE_READLINE_4], [0], [Define to 1 if readline has version >= 4.0.])])
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  AC_CHECK_LIB(readline, rl_free_undo_list,
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    [AC_DEFINE([HAVE_READLINE_4_2], [1], [Define to 1 if readline has version >= 4.2.])],
    [AC_DEFINE([HAVE_READLINE_4_2], [0], [Define to 1 if readline has version >= 4.2.])])
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else
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  AC_DEFINE([HAVE_READLINE_4], [0], [Define to 1 if readline has version >= 4.0.])
  AC_DEFINE([HAVE_READLINE_4_2], [0], [Define to 1 if readline has version >= 4.2.])
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fi

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dnl ** check for math library
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AC_CHECK_LIB([m], [atan], [LIBS="-lm $LIBS"; LIBM="-lm"], [LIBM=])
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AC_SUBST([LIBM])
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dnl ** check for X Window System
AC_PATH_XTRA()
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if test "$no_x" = yes; then
  GhcLibsWithX11=NO
else
  GhcLibsWithX11=YES
fi
AC_SUBST([GhcLibsWithX11])

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dnl ################################################################
dnl Check for libraries
dnl ################################################################

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dnl ** check for libdl & RTLD_NEXT

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dnl (Mac OS X only) ... but don't check if we already have the
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dnl HaskellSupport.framework
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if test $HaveFrameworkHaskellSupport = YES; then
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    HaveLibDL=NO
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    HaveRtldNext=NO
    HaveRtldLocal=YES
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    AC_DEFINE([HAVE_RTLDLOCAL], [1], [Define to 1 if RTLD_LOCAL is available.])
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    HaveRtldGlobal=YES
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    AC_DEFINE([HAVE_RTLDGLOBAL], [1], [Define to 1 if RTLD_GLOBAL is available.])
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    HaveRtldNow=YES
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    AC_DEFINE([HAVE_RTLDNOW], [1], [Define to 1 if we can see RTLD_NOW in dlfcn.h.])
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    AC_SUBST(HaveLibDL)
    AC_SUBST(HaveRtldNext)
    AC_SUBST(HaveRtldLocal)
    AC_SUBST(HaveRtldGlobal)
    AC_SUBST(HaveRtldNow)
else
    AC_CHECK_LIB(dl, dlopen, 
    	[HaveLibDL=YES
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    	 AC_DEFINE([HAVE_LIBDL], [1], [Define to 1 if you need -ldl to get dlopen().])
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    	 LIBS="$LIBS -ldl"], 
    	[HaveLibDL=NO])
    AC_CHECK_FUNCS(dlopen)
    AC_SUBST(HaveLibDL)

    dnl ** sometimes RTLD_NEXT is hidden in #ifdefs we really don't wan to set
    AC_MSG_CHECKING(for RTLD_NEXT from dlfcn.h)
    AC_EGREP_CPP(yes,
    [
     #include <dlfcn.h>
     #ifdef RTLD_NEXT
            yes
     #endif
    ], [
      AC_MSG_RESULT(yes)
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      AC_DEFINE([HAVE_RTLDNEXT], [1], [Define to 1 if we can see RTLD_NEXT in dlfcn.h.])
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