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# Extra autoconf macros for the Glasgow fptools
#
# To be a good autoconf citizen, names of local macros have prefixed with FP_ to
# ensure we don't clash with any pre-supplied autoconf ones.
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# FP_EVAL_STDERR(COMMAND)
# ------------------------
# Eval COMMAND, save its stderr (without lines resulting from shell tracing)
# into the file conftest.err and the exit status in the variable fp_status.
AC_DEFUN([FP_EVAL_STDERR],
[{ (eval $1) 2>conftest.er1
  fp_status=$?
  grep -v '^ *+' conftest.er1 >conftest.err
  rm -f conftest.er1
  (exit $fp_status); }[]dnl
])# FP_EVAL_STDERR


# FP_CHECK_FLAG(FLAG, [ACTION-IF-SUPPORTED], [ACTION-IF-NOT-SUPPORTED])
# -----------------------------------------------------------------------
# Check to see whether the compiler for the current language supports a
# particular option.
#
# Implementation note: When given an unkown option, GCC issues an warning on
# stderr only, but returns an exit value of 0 nevertheless. Consequently we have
# to check stderr *and* the exit value.
#
# Used by ghc.
AC_DEFUN(FP_CHECK_FLAG,
[AC_LANG_COMPILER_REQUIRE()dnl
AC_LANG_CASE([C],          [fp_compiler="$CC"  m4_pushdef([fp_Flags], [CFLAGS])],
             [C++],        [fp_compiler="$CXX" m4_pushdef([fp_Flags], [CXXFLAGS])],
             [Fortran 77], [fp_compiler="$F77" m4_pushdef([fp_Flags], [FFLAGS])])
m4_pushdef([fp_Cache], [fp_cv_[]fp_Flags[]AS_TR_SH([$1])])[]dnl
AC_CACHE_CHECK([whether $fp_compiler accepts $1], [fp_Cache],
[AC_LANG_CONFTEST([AC_LANG_PROGRAM()])
fp_save_flags="$fp_Flags"
fp_Flags="$fp_Flags $1"
fp_Cache=no
if FP_EVAL_STDERR([$ac_compile conftest.$ac_ext]) >/dev/null; then
  test -s conftest.err || fp_Cache=yes
fi
fp_Flags="$fp_save_flags"
rm -f conftest.err conftest.$ac_ext])
AS_IF([test $fp_Cache = yes], [$2], [$3])[]dnl
m4_popdef([fp_Cache])[]dnl
m4_popdef([fp_Flags])[]dnl
])# FP_CHECK_FLAG


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# FP_PROG_CONTEXT_DIFF
# --------------------
# Figure out how to do context diffs. Sets the output variable ContextDiffCmd.
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#
# Note: NeXTStep thinks diff'ing a file against itself is "trouble".
#
# Used by ghc, glafp-utils/ltx, and glafp-utils/runstdtest.
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AC_DEFUN([FP_PROG_CONTEXT_DIFF],
[AC_CACHE_CHECK([for a working context diff], [fp_cv_context_diff],
[echo foo > conftest1
echo foo > conftest2
fp_cv_context_diff=no
for fp_var in '-C 1' '-c1'
do
  if diff $fp_var conftest1 conftest2 > /dev/null 2>&1; then
    fp_cv_context_diff="diff $fp_var"
    break
  fi
done])
if test x"$fp_cv_context_diff" = xno; then
   AC_MSG_ERROR([cannot figure out how to do context diffs])
fi
AC_SUBST(ContextDiffCmd, [$fp_cv_context_diff])
])# FP_PROG_CONTEXT_DIFF


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# FP_DECL_ALTZONE
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# -------------------
# Defines HAVE_DECL_ALTZONE to 1 if declared, 0 otherwise.
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#
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# Used by base package.
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AC_DEFUN([FP_DECL_ALTZONE],
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[AC_REQUIRE([AC_HEADER_TIME])dnl
AC_CHECK_HEADERS([sys/time.h])
AC_CHECK_DECLS([altzone], [], [],[#if TIME_WITH_SYS_TIME
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# include <sys/time.h>
# include <time.h>
#else
# if HAVE_SYS_TIME_H
#  include <sys/time.h>
# else
#  include <time.h>
# endif
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#endif])
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])# FP_DECL_ALTZONE
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# FP_COMPUTE_INT(EXPRESSION, VARIABLE, INCLUDES, IF-FAILS)
# ---------------------------------------------------------
# Assign VARIABLE the value of the compile-time EXPRESSION using INCLUDES for
# compilation. Execute IF-FAILS when unable to determine the value. Works for
# cross-compilation, too.
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#
# Implementation note: We are lazy and use an internal autoconf macro, but it
# is supported in autoconf versions 2.50 up to the actual 2.57, so there is
# little risk.
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AC_DEFUN([FP_COMPUTE_INT],
[_AC_COMPUTE_INT([$1], [$2], [$3], [$4])[]dnl
])# FP_COMPUTE_INT


# FP_CHECK_ALIGNMENT(TYPE, [IGNORED], [INCLUDES = DEFAULT-INCLUDES])
# ------------------------------------------------------------------
# A variation of AC_CHECK_SIZEOF for computing the alignment restrictions of a
# given type. Defines ALIGNMENT_TYPE.
AC_DEFUN([FP_CHECK_ALIGNMENT],
[AS_LITERAL_IF([$1], [],
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               [AC_FATAL([$0: requires literal arguments])])[]dnl
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AC_CHECK_TYPE([$1], [], [], [$3])
AC_CACHE_CHECK([alignment of $1], AS_TR_SH([fp_cv_alignment_$1]),
[if test "$AS_TR_SH([ac_cv_type_$1])" = yes; then
  FP_COMPUTE_INT([(long) (&((struct { char c; $1 ty; } *)0)->ty)],
                 [AS_TR_SH([fp_cv_alignment_$1])],
                 [AC_INCLUDES_DEFAULT([$3])],
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                 [AC_MSG_ERROR([cannot compute alignment ($1)
See `config.log' for more details.], [77])])
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else
  AS_TR_SH([fp_cv_alignment_$1])=0
fi])dnl
AC_DEFINE_UNQUOTED(AS_TR_CPP(alignment_$1), $AS_TR_SH([fp_cv_alignment_$1]),
                   [The alignment of a `$1'.])
])# FP_CHECK_ALIGNMENT


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dnl ** check for leading underscores in symbol names
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dnl 
dnl Test for determining whether symbol names have a leading
dnl underscore.
dnl 
dnl We assume that they _haven't_ if anything goes wrong.
dnl
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dnl Some nlist implementations seem to try to be compatible by ignoring
dnl a leading underscore sometimes (eg. FreeBSD).  We therefore have
dnl to work around this by checking for *no* leading underscore first.
dnl Sigh.  --SDM
dnl
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dnl Similarly on OpenBSD, but this test doesn't help. -- dons
dnl
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AC_DEFUN(FPTOOLS_UNDERSCORE,
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[AC_CHECK_LIB(elf, nlist, LIBS="-lelf $LIBS")dnl
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AC_CACHE_CHECK([leading underscore in symbol names], fptools_cv_lead_uscore,
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dnl
dnl Hack!: nlist() under Digital UNIX insist on there being an _,
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dnl but symbol table listings shows none. What is going on here?!?
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dnl
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dnl Another hack: cygwin doesn't come with nlist.h , so we hardwire
dnl the underscoredness of that "platform"
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changequote(<<, >>)dnl
<<
case $HostPlatform in
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*openbsd*) # x86 openbsd is ELF from 3.4 >, meaning no leading uscore
    case $build in
        i386-*2\.[[0-9]] | i386-*3\.[[0-3]] ) fptools_cv_lead_uscore='yes' ;;
        *)      fptools_cv_lead_uscore='no' ;;
    esac ;;
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alpha-dec-osf*) fptools_cv_lead_uscore='no';;
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*cygwin32) fptools_cv_lead_uscore='yes';;
*mingw32) fptools_cv_lead_uscore='yes';;
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*) >>
changequote([, ])dnl
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AC_TRY_RUN([#ifdef HAVE_NLIST_H
#include <nlist.h>
changequote(<<, >>)dnl
<<
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struct nlist xYzzY1[] = {{"xYzzY1", 0},{0}};
struct nlist xYzzY2[] = {{"_xYzzY2", 0},{0}};
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#endif

main(argc, argv)
int argc;
char **argv;
{
#ifdef HAVE_NLIST_H
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    if(nlist(argv[0], xYzzY1) == 0 && xYzzY1[0].n_value != 0)
        exit(1);
    if(nlist(argv[0], xYzzY2) == 0 && xYzzY2[0].n_value != 0)
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        exit(0);>>
changequote([, ])dnl
#endif
    exit(1);
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}], fptools_cv_lead_uscore=yes, fptools_cv_lead_uscore=no, fptools_cv_lead_uscore=NO)
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;;
esac);
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LeadingUnderscore=`echo $fptools_cv_lead_uscore | sed 'y/yesno/YESNO/'`
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AC_SUBST(LeadingUnderscore)
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case $LeadingUnderscore in
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YES) AC_DEFINE([LEADING_UNDERSCORE], [1], [Define to 1 if C symbols have a leading underscore added by the compiler.]);;
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esac
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])

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dnl
dnl FPTOOLS_PROG_CHECK_VERSION(VERSIONSTR1, TEST, VERSIONSTR2,
dnl                            ACTION-IF-TRUE [, ACTION-IF-FALSE])
dnl
dnl compare versions field-wise (separator is '.')
dnl TEST is one of {-lt,-le,-eq,-ge,-gt}
dnl
dnl quite shell-independant and SUSv2 compliant code
dnl
dnl NOTE: the loop could be unrolled within autoconf, but the
dnl       macro code would be a) longer and b) harder to debug... ;)
dnl
AC_DEFUN(FPTOOLS_PROG_CHECK_VERSION,
[if ( IFS=".";
      a="[$1]";  b="[$3]";
      while test -n "$a$b"
      do
              set -- [$]a;  h1="[$]1";  shift 2>/dev/null;  a="[$]*"
              set -- [$]b;  h2="[$]1";  shift 2>/dev/null;  b="[$]*"
              test -n "[$]h1" || h1=0;  test -n "[$]h2" || h2=0
              test [$]{h1} -eq [$]{h2} || break
      done
      test [$]{h1} [$2] [$]{h2}
    )
then ifelse([$4],,[:],[
  $4])
ifelse([$5],,,
[else
  $5])
fi
])])dnl


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dnl
dnl Check for Greencard and version.
dnl
AC_DEFUN(FPTOOLS_GREENCARD,
[
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AC_PATH_PROG(GreencardCmd,greencard)
AC_CACHE_CHECK([for version of greencard], fptools_cv_greencard_version,
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changequote(, )dnl
[if test x"$GreencardCmd" != x; then
   fptools_cv_greencard_version="`$GreencardCmd --version |
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			  grep 'version' | sed -e 's/greencard. version \([^ ]*\).*/\1/g'`"
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else
   fptools_cv_greencard_version=""
fi
changequote([, ])dnl
])
FPTOOLS_PROG_CHECK_VERSION([$fptools_cv_greencard_version],-lt,$1,
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  [AC_MSG_ERROR([greencard version $1 or later is required (found '$fptools_cv_greencard_version')])])dnl
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GreencardVersion=$fptools_cv_greencard_version
AC_SUBST(GreencardVersion)
])

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dnl
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dnl Check for Happy and version.  If we're building GHC, then we need
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dnl at least Happy version 1.13.  If there's no installed Happy, we look
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dnl for a happy source tree and point the build system at that instead.
dnl
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AC_DEFUN(FPTOOLS_HAPPY,
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[
if test -d $srcdir/happy; then
   SrcTreeHappyCmd=$hardtop/happy/src/happy-inplace
fi
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if test x"$UseSrcTreeHappy" = xYES; then
  HappyCmd=$SrcTreeHappyCmd
else
  AC_PATH_PROG(HappyCmd,happy,$SrcTreeHappyCmd)
fi
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AC_CACHE_CHECK([for version of happy], fptools_cv_happy_version,
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changequote(, )dnl
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[if test x"$HappyCmd" = x"$SrcTreeHappyCmd"; then
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   fptools_cv_happy_version=`grep '^ProjectVersion[ 	]*=' $srcdir/happy/mk/version.mk | sed 's/.*\([0-9][0-9]*\.[0-9][0-9]*\).*/\1/g'`;
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elif test x"$HappyCmd" != x; then
   fptools_cv_happy_version="`$HappyCmd -v |
			  grep 'Happy Version' | sed -e 's/Happy Version \([^ ]*\).*/\1/g'`" ;
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else
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   fptools_cv_happy_version="";
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fi;
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changequote([, ])dnl
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])
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if test -d $srcdir/ghc -a ! -f $srcdir/ghc/compiler/parser/Parser.hs; then
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  FPTOOLS_PROG_CHECK_VERSION([$fptools_cv_happy_version],-lt,[1.13],
  [AC_MSG_ERROR([Happy version 1.13 or later is required to compile GHC.])])dnl
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fi
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HappyVersion=$fptools_cv_happy_version;
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AC_SUBST(HappyVersion)
])

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dnl
dnl Check for Haddock and version.  If there's no installed Haddock, we look
dnl for a haddock source tree and point the build system at that instead.
dnl
AC_DEFUN(FPTOOLS_HADDOCK,
[
if test -d $srcdir/haddock; then
   SrcTreeHaddockCmd=$hardtop/haddock/src/haddock-inplace
fi
if test x"$UseSrcTreeHaddock" = xYES; then
  HaddockCmd=$SrcTreeHaddockCmd
else
  AC_PATH_PROG(HaddockCmd,haddock,$SrcTreeHaddockCmd)
fi
dnl Darn, I forgot to make Haddock print out its version number when
dnl invoked with -v.  We could try generating some HTML and grepping
dnl through that to find the version number, but I think we'll make
dnl do without it for now.
])

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dnl
dnl Check for Alex and version.  If we're building GHC, then we need
dnl at least Alex version 2.0.  If there's no installed Alex, we look
dnl for a alex source tree and point the build system at that instead.
dnl
AC_DEFUN(FPTOOLS_ALEX,
[
if test -d $srcdir/alex; then
   SrcTreeAlexCmd=$hardtop/alex/src/alex-inplace
fi
if test x"$UseSrcTreeAlex" = xYES; then
  AlexCmd=$SrcTreeAlexCmd
else
  AC_PATH_PROG(AlexCmd,alex,$SrcTreeAlexCmd)
fi
AC_CACHE_CHECK([for version of alex], fptools_cv_alex_version,
changequote(, )dnl
[if test x"$AlexCmd" = x"$SrcTreeAlexCmd"; then
   fptools_cv_alex_version=`grep '^ProjectVersion[ 	]*=' $srcdir/alex/mk/version.mk | sed 's/.*\([0-9][0-9]*\.[0-9][0-9]*\).*/\1/g'`;
elif test x"$AlexCmd" != x; then
   fptools_cv_alex_version="`$AlexCmd -v |
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			  grep 'Alex [Vv]ersion' | sed -e 's/Alex [Vv]ersion \([0-9\.]*\).*/\1/g'`" ;
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else
   fptools_cv_alex_version="";
fi;
changequote([, ])dnl
])
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dnl if test -d $srcdir/ghc -a ! -f $srcdir/ghc/compiler/parser/Lexer.hs; then
dnl   FPTOOLS_PROG_CHECK_VERSION([$fptools_cv_alex_version],-lt,[2.0],
dnl   [AC_MSG_ERROR([Alex version 2.0 or later is required to compile GHC.])])dnl
dnl fi
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AlexVersion=$fptools_cv_alex_version;
AC_SUBST(AlexVersion)
])

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dnl
dnl Check whether ld supports -x
dnl
AC_DEFUN(FPTOOLS_LD_X,
[AC_CACHE_CHECK([whether ld understands -x], fptools_cv_ld_x,
[
echo 'foo() {}' > conftest.c
${CC-cc} -c conftest.c
if ${LdCmd} -r -x -o foo.o conftest.o; then
   fptools_cv_ld_x=yes
else
   fptools_cv_ld_x=no
fi
rm -rf conftest.c conftest.o foo.o
])
if test "$fptools_cv_ld_x" = yes; then
	LdXFlag=-x
else
	LdXFlag=
fi
AC_SUBST(LdXFlag)
])

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dnl *** Checking for ar and its arguments + whether we need ranlib.
dnl
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dnl ArCmd, ArSupportsInput and RANLIB are AC_SUBST'ed
dnl On Digital UNIX, we test for the -Z (compress) and
dnl -input (take list of files from external file) flags.
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dnl 
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AC_DEFUN(FPTOOLS_PROG_AR_AND_RANLIB,
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[AC_PATH_PROG(ArCmdRaw,ar)
if test -z "$ArCmdRaw"; then
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    echo "You don't seem to have ar in your PATH...I have no idea how to make a library"
    exit 1;
fi
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dnl GNU ar needs special treatment: it appears to have problems with
dnl object files with the same name if you use the 's' modifier, but
dnl simple 'ar q' works fine, and doesn't need a separate ranlib.
if $ArCmdRaw --version | grep 'GNU' >/dev/null 2>/dev/null; then
    ArCmdArgs='q'
    NeedRanLib=''
elif $ArCmdRaw clqsZ conftest.a >/dev/null 2>/dev/null; then
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    ArCmdArgs="clqsZ"
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    NeedRanLib=''
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elif $ArCmdRaw clqs conftest.a >/dev/null 2>/dev/null; then
    ArCmdArgs="clqs"
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    NeedRanLib=''
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elif $ArCmdRaw cqs conftest.a >/dev/null 2>/dev/null; then
    ArCmdArgs="cqs"
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    NeedRanLib=''
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elif $ArCmdRaw clq conftest.a >/dev/null 2>/dev/null; then
    ArCmdArgs="clq"
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    NeedRanLib='YES'
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elif $ArCmdRaw cq conftest.a >/dev/null 2>/dev/null; then
    ArCmdArgs="cq"
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    NeedRanLib='YES'
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elif $ArCmdRaw cq conftest.a 2>&1 | grep 'no archive members specified' >/dev/null 2>/dev/null; then
    ArCmdArgs="cq"
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    NeedRanLib='YES'
else
    echo "I can't figure out how to use your $ArCmd"
    exit 1
fi
rm -rf conftest*
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case $HostPlatform in
 *mingw32) 
 	  ArCmd="`cygpath -w ${ArCmdRaw} | sed -e 's@\\\\@/@g' ` ${ArCmdArgs}"
 	  ;;
 *) ArCmd="${ArCmdRaw} ${ArCmdArgs}"
    ;;
esac
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test -n "$ArCmd" && test -n "$verbose" && echo "        setting ArCmd to $ArCmd"
AC_SUBST(ArCmd)
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if $ArCmd conftest.a -input /dev/null >/dev/null 2>/dev/null; then
    ArSupportsInput='-input'
else
    ArSupportsInput=''
fi
rm -rf conftest*
test -n "$ArSupportsInput" && test -n "$verbose" && echo "        setting ArSupportsInput to $ArSupportsInput"
AC_SUBST(ArSupportsInput)
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if test -z "$NeedRanLib"; then
    RANLIB=':'
    test -n "$verbose" && echo "        setting RANLIB to $RANLIB"
    AC_SUBST(RANLIB)
else
    AC_PROG_RANLIB
fi
])

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dnl
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dnl AC_SHEBANG_PERL - can we she-bang perl?
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dnl
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AC_DEFUN(FPTOOLS_SHEBANG_PERL,
[AC_CACHE_CHECK([if your perl works in shell scripts], fptools_cv_shebang_perl,
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[echo "#!$PerlCmd"'
exit $1;
' > conftest
chmod u+x conftest
(SHELL=/bin/sh; export SHELL; ./conftest 69 > /dev/null)
if test $? -ne 69; then
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   fptools_cv_shebang_perl=yes
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else
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   fptools_cv_shebang_perl=no
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fi
rm -f conftest
])])

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dnl
dnl Extra testing of the result AC_PROG_CC, testing the gcc version no.
dnl *Must* be called after AC_PROG_CC
dnl
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AC_DEFUN(FPTOOLS_HAVE_GCC,
[AC_CACHE_CHECK([whether you have an ok gcc], fptools_cv_have_gcc,
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[if test -z "$GCC"; then
    echo ''
    echo "You would be better off with gcc"
    echo "Perhaps it is already installed, but not in your PATH?"
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    fptools_cv_have_gcc='no'
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else
changequote(, )dnl
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    gcc_version_str="`$CC -v 2>&1 | grep 'version ' | sed -e 's/.*version [^0-9]*\([0-9][0-9]*\)\.\([0-9][0-9]*\).*/\1\.\2/g' `"
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changequote([, ])dnl
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    fptools_cv_have_gcc='yes'
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    FPTOOLS_PROG_CHECK_VERSION($gcc_version_str, -lt, "2.0",
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        fptools_cv_have_gcc='no'
        echo ""
	echo "your gcc version appears to be ..."
        $CC --version
        echo "gcc prior to 2.0 and have never worked with ghc."
        echo "we recommend 2.95.3, although versions back to 2.7.2 should be ok."
        AC_MSG_ERROR([gcc 1.X has never been supported])
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    )
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fi
])
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HaveGcc=`echo $fptools_cv_have_gcc | sed 'y/yesno/YESNO/'`
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AC_SUBST(HaveGcc)
])

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dnl
dnl Some OSs (Mandrake Linux, in particular) configure GCC with
dnl -momit-leaf-frame-pointer on by default.  If this is the case, we
dnl need to turn it off for mangling to work.  The test is currently a bit
dnl crude, using only the version number of gcc.
dnl
AC_DEFUN(FPTOOLS_GCC_NEEDS_NO_OMIT_LFPTR,
[AC_CACHE_CHECK([whether gcc needs -mno-omit-leaf-frame-pointer], fptools_cv_gcc_needs_no_omit_lfptr,
[
 fptools_cv_gcc_needs_no_omit_lfptr='no'
 FPTOOLS_PROG_CHECK_VERSION($gcc_version_str, -ge, "3.2",
     fptools_cv_gcc_needs_no_omit_lfptr='yes')
])
if test "$fptools_cv_gcc_needs_no_omit_lfptr" = "yes"; then
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   AC_DEFINE([HAVE_GCC_MNO_OMIT_LFPTR], [1], [Define to 1 if gcc supports -mno-omit-leaf-frame-pointer.])
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fi
])

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dnl Small feature test for perl version. Assumes PerlCmd
dnl contains path to perl binary
dnl
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AC_DEFUN(FPTOOLS_CHECK_PERL_VERSION,
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[$PerlCmd -v >conftest.out 2>&1
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if grep "version 5" conftest.out >/dev/null 2>&1; then
   :
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else
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   if grep "v5.6" conftest.out >/dev/null 2>&1; then
      :
   else
      if grep "v5.8" conftest.out >/dev/null 2>&1; then
         :
      else
         if grep "version 6" conftest.out >/dev/null 2>&1; then
            :
         else
            echo "Your version of perl probably won't work."
         fi  
      fi
   fi
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fi
rm -fr conftest*
])
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dnl
dnl Getting at the right version of 'find'
dnl (i.e., not the MS util on a Win32 box).
dnl
AC_DEFUN(FPTOOLS_FIND_FIND,
[
AC_PATH_PROG(Find2Cmd, find)
$Find2Cmd --version > conftest.out 2>&1 
if grep "FIND: Parameter format" conftest.out >/dev/null 2>&1 ; then
   # Encountered MS' find utility, which is not what we're after.
   #
   # HACK - AC_CHECK_PROG is useful here in that does let you reject
   # an (absolute) entry in the path (Find2Cmd). It is not so useful
   # in that it doesn't let you (AFAIU) set VARIABLE equal to the 
   # absolute path eventually found. So, hack around this by inspecting
   # what variables hold the abs. path & use them directly.
   AC_CHECK_PROG(FindCmd,find,`echo $ac_dir/$ac_word`,find,,$Find2Cmd)
else
FindCmd=$Find2Cmd
AC_SUBST(FindCmd)
fi
])

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dnl
dnl FPTOOLS_NOCACHE_CHECK prints a message, then sets the
dnl values of the second argument to the result of running
dnl the commands given by the third. It does not cache its
dnl result, so it is suitable for checks which should be
dnl run every time.
dnl
AC_DEFUN(FPTOOLS_NOCACHE_CHECK,
[AC_MSG_CHECKING([$1])
 $3
 AC_MSG_RESULT([$][$2])
])

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dnl
dnl FPTOOLS_GHC_VERSION(version)
dnl FPTOOLS_GHC_VERSION(major, minor [, patchlevel])
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dnl FPTOOLS_GHC_VERSION(version, major, minor, patchlevel)
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dnl
dnl Test for version of installed ghc.  Uses $GHC.
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dnl [original version pinched from c2hs]
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dnl
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AC_DEFUN(FPTOOLS_GHC_VERSION,
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[FPTOOLS_NOCACHE_CHECK([version of ghc], [fptools_version_of_ghc],
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["${WithGhc-ghc}" --version > conftestghc 2>&1
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  cat conftestghc >&AC_FD_CC
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#Useless Use Of cat award...
  fptools_version_of_ghc=`cat conftestghc | sed -n -e 's/, patchlevel *\([[0-9]]\)/.\1/;s/.* version \([[0-9]][[0-9.]]*\).*/\1/p'`
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  rm -fr conftest*
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  if test "[$]fptools_version_of_ghc" = ""
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  then
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    fptools_version_of_ghc='unknown'
  fi
fptools_version_of_ghc[_major]=`echo [$]fptools_version_of_ghc | sed -e 's/^\([[0-9]]\).*/\1/'`
fptools_version_of_ghc[_minor]=`echo [$]fptools_version_of_ghc | sed -e 's/^[[0-9]]\.\([[0-9]]*\).*/\1/'`
fptools_version_of_ghc[_pl]=`echo [$]fptools_version_of_ghc | sed -n -e 's/^[[0-9]]\.[[0-9]]*\.\([[0-9]]*\)/\1/p'`
#
if test "[$]fptools_version_of_ghc[_pl]" = ""
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then
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  fptools_version_of_ghc[_all]="[$]fptools_version_of_ghc[_major].[$]fptools_version_of_ghc[_minor]"
  fptools_version_of_ghc[_pl]="0"
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else
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  fptools_version_of_ghc[_all]="[$]fptools_version_of_ghc[_major].[$]fptools_version_of_ghc[_minor].[$]fptools_version_of_ghc[_pl]"
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fi
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#
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ifelse($#, [1], [dnl
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[$1]="[$]fptools_version_of_ghc[_all]"
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], $#, [2], [dnl
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[$1]="[$]fptools_version_of_ghc[_major]"
[$2]="[$]fptools_version_of_ghc[_minor]"
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], $#, [3], [dnl
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[$1]="[$]fptools_version_of_ghc[_major]"
[$2]="[$]fptools_version_of_ghc[_minor]"
[$3]="[$]fptools_version_of_ghc[_pl]"
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], $#, [4], [dnl
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[$1]="[$]fptools_version_of_ghc[_all]"
[$2]="[$]fptools_version_of_ghc[_major]"
[$3]="[$]fptools_version_of_ghc[_minor]"
[$4]="[$]fptools_version_of_ghc[_pl]"
])
])
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])dnl
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dnl ** Map an arithmetic C type to a Haskell type.
dnl    Based on autconf's AC_CHECK_SIZEOF.

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dnl FPTOOLS_CHECK_HTYPE(TYPE [, DEFAULT_VALUE, [, VALUE-FOR-CROSS-COMPILATION])
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AC_DEFUN(FPTOOLS_CHECK_HTYPE,
[changequote(<<, >>)dnl
dnl The name to #define.
define(<<AC_TYPE_NAME>>, translit(htype_$1, [a-z *], [A-Z_P]))dnl
dnl The cache variable name.
define(<<AC_CV_NAME>>, translit(fptools_cv_htype_$1, [ *], [_p]))dnl
changequote([, ])dnl
AC_MSG_CHECKING(Haskell type for $1)
AC_CACHE_VAL(AC_CV_NAME,
[AC_TRY_RUN([#include <stdio.h>
#include <stddef.h>
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#ifdef HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif

#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif

#ifdef HAVE_SYS_STAT_H
# include <sys/stat.h>
#endif

#ifdef HAVE_FCNTL_H
# include <fcntl.h>
#endif

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#ifdef HAVE_SIGNAL_H
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# include <signal.h>
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#endif
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#ifdef HAVE_TIME_H
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# include <time.h>
#endif

#ifdef HAVE_TERMIOS_H
# include <termios.h>
#endif

#ifdef HAVE_STRING_H
# include <string.h>
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#endif
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#ifdef HAVE_CTYPE_H
# include <ctype.h>
#endif

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#ifdef HAVE_GL_GL_H
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# include <GL/gl.h>
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#endif
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#ifdef HAVE_OPENGL_GL_H
# include <OpenGL/gl.h>
#endif

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#ifdef HAVE_SYS_RESOURCE_H
# include <sys/resource.h>
#endif

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typedef $1 testing;

main() {
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  FILE *f=fopen("conftestval", "w");
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  if (!f) exit(1);
  if (((testing)((int)((testing)1.4))) == ((testing)1.4)) {
    fprintf(f, "%s%d\n",
           ((testing)(-1) < (testing)0) ? "Int" : "Word",
           sizeof(testing)*8);
  } else {
    fprintf(f,"%s\n",
           (sizeof(testing) >  sizeof(double)) ? "LDouble" :
           (sizeof(testing) == sizeof(double)) ? "Double"  : "Float");
  }
  fclose(f);
  exit(0);
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}], AC_CV_NAME=`cat conftestval`,
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ifelse([$2], , AC_CV_NAME=NotReallyAType,      AC_CV_NAME=$2),
ifelse([$3], , AC_CV_NAME=NotReallyATypeCross, AC_CV_NAME=$3))]) dnl
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AC_MSG_RESULT($AC_CV_NAME)
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AC_DEFINE_UNQUOTED(AC_TYPE_NAME, $AC_CV_NAME, [Define to Haskell type for $1])
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undefine([AC_TYPE_NAME])dnl
undefine([AC_CV_NAME])dnl
])

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dnl ** Obtain the value of a C constant.
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dnl    The value will be `(-1)' if the constant is undefined.
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dnl
dnl    This is set up so that the argument can be a shell variable.
dnl
AC_DEFUN(FPTOOLS_CHECK_CCONST,
[
eval "cv_name=ac_cv_cconst_$1"
AC_MSG_CHECKING(value of $1)
AC_CACHE_VAL($cv_name,
[AC_TRY_RUN([#include <stdio.h>
#include <errno.h>
main()
{
  FILE *f=fopen("conftestval", "w");
  if (!f) exit(1);
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  fprintf(f, "%d\n", $1);
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  exit(0);
}], 
eval "$cv_name=`cat conftestval`",
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eval "$cv_name=-1",
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eval "$cv_name=-1")])dnl
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eval "fptools_check_cconst_result=`echo '$'{$cv_name}`"
AC_MSG_RESULT($fptools_check_cconst_result)
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AC_DEFINE_UNQUOTED(CCONST_$1, $fptools_check_cconst_result, [The value of $1.])
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unset fptools_check_cconst_result
])

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# FP_CHECK_CCONSTS_TEMPLATE(CONST...)
# -----------------------------------
m4_define([FP_CHECK_CCONSTS_TEMPLATE],
[AC_FOREACH([FP_Const], [$1],
  [AH_TEMPLATE(AS_TR_CPP(CCONST_[]FP_Const),
               [The value of ]FP_Const[.])])[]dnl
])# FP_CHECK_CCONSTS_TEMPLATE


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dnl ** Invoke AC_CHECK_CCONST on each argument (which have to separate with 
dnl    spaces)
dnl
AC_DEFUN(FPTOOLS_CHECK_CCONSTS,
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[FP_CHECK_CCONSTS_TEMPLATE([$1])dnl
for ac_const_name in $1
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do
FPTOOLS_CHECK_CCONST($ac_const_name)dnl
done
])


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dnl *** Can we open files in binary mode? ***
dnl 
AC_DEFUN(FPTOOLS_O_BINARY,
[
AC_REQUIRE([AC_PROG_CC])
AC_MSG_CHECKING(whether we can open files in binary mode)
AC_CACHE_VAL(fptools_cv_have_o_binary,
[
AC_LANG_SAVE
AC_LANG_C
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AC_TRY_COMPILE(
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[#ifdef HAVE_FCNTL_H
#include <fcntl.h>
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#endif],
[int x = O_BINARY;],
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fptools_cv_have_o_binary=yes,
fptools_cv_have_o_binary=no)
AC_LANG_RESTORE
])
AC_MSG_RESULT($fptools_cv_have_o_binary)
if test "$fptools_cv_have_o_binary" = yes; then
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  AC_DEFINE([HAVE_O_BINARY], [1], [Define to 1 if fcntl.h defines O_BINARY.])
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fi
])
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dnl Based on AC_TRY_LINK - run iftrue if links cleanly with no warning

dnl FPTOOLS_TRY_LINK_NOWARN(flags,main?,iftrue,iffalse)

AC_DEFUN(FPTOOLS_TRY_LINK_NOWARN,
[
ac_save_LIBS="$LIBS"
LIBS=[$1];
cat > conftest.$ac_ext <<EOF
dnl This sometimes fails to find confdefs.h, for some reason.
dnl [#]line __oline__ "[$]0"
[#]line __oline__ "configure"
#include "confdefs.h"
[$2]
int t() { return 0; }
EOF
if AC_TRY_EVAL(ac_link); then
  ifelse([$3], , :, [
    LIBS="$ac_save_LIBS"
    rm -rf conftest*
    $3])
  ifelse([$4], , , [else
    LIBS="$ac_save_LIBS"
    rm -rf conftest*
    $4
])dnl
fi
rm -f conftest*
]
)

dnl Loosely based on AC_CHECK_LIB in acgeneral.m4 in autoconf distribution

dnl FPTOOLS_CHECK_FLAG_NOWARN(NAME, FLAG, CODE, iftrue, iffalse)

AC_DEFUN(FPTOOLS_CHECK_FLAG_NOWARN,
[AC_MSG_CHECKING([for $1])
 AC_CACHE_VAL(ac_cv_flag_$1,
   [FPTOOLS_TRY_LINK_NOWARN("$2", [main() { $3; exit(0); } ],
     eval "ac_cv_flag_$1=yes",
     eval "ac_cv_flag_$1=no"
   )]
 )
if eval "test \"`echo '$ac_cv_flag_'$1`\" = yes"; then
  AC_MSG_RESULT(yes)
  LIBS="$2 $LIBS"
  $4
else
  AC_MSG_RESULT(no)
  $5
fi
])

dnl FPTOOLS_CHECK_LIB_NOWARN(LIBRARY, FUNCTION)

AC_DEFUN(FPTOOLS_CHECK_LIB_NOWARN,
[FPTOOLS_CHECK_FLAG_NOWARN([function_$2],[],[extern char $2(); $2();],
[changequote(, )dnl
  ac_tr_lib=HAVE_LIB`echo $1 | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`
 changequote([, ])dnl
 AC_DEFINE_UNQUOTED($ac_tr_lib)
],
[FPTOOLS_CHECK_FLAG_NOWARN([library_$1],[-l$1],[extern char $2(); $2();],
[changequote(, )dnl
  ac_tr_lib=HAVE_LIB`echo $1 | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`
 changequote([, ])dnl
 AC_DEFINE_UNQUOTED($ac_tr_lib)
],
[]
)])]
)


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dnl ** Check which CATALOG file we have to use with DocBook SGML.
dnl
dnl FPTOOLS_DOCBOOK_CATALOG(VARIABLE, JADE, STYLESHEET, CATALOGS-TO-CHECK-FOR)
dnl
dnl If any of the catalogs given in CATALOGS-TO-CHECK-FOR works on this
dnl platform, let VARIABLE refer to this catalog; otherwise, VARIABLE
dnl is set to "no".  JADE is the jade executable and STYLESHEET
dnl a DocBook style sheet.
dnl
AC_DEFUN(FPTOOLS_DOCBOOK_CATALOG,
[AC_CACHE_CHECK([for DocBook CATALOG], fptools_cv_sgml_catalog,
[
cat > conftest.sgml << EOF
<!DOCTYPE Article PUBLIC "-//OASIS//DTD DocBook V3.1//EN">
<Article>
<ArtHeader>
<Title>Test</Title>
<Author><OtherName>Test</OtherName></Author>
<Address>Test</Address>
<PubDate>Test</PubDate>
</ArtHeader>
<Sect1><Title>Test</Title>
<Para>
Test.
</Para>
</Sect1>
</Article>
EOF
fptools_cv_sgml_catalog=no
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if test -z "$SGML_CATALOG_FILES" ; then
 for fptools_catalog in $4; do
   ac_try="$2 -t rtf -d $3#print -c $fptools_catalog conftest.sgml"
   if AC_TRY_EVAL(ac_try); then
     fptools_cv_sgml_catalog=[$]fptools_catalog
     break
   fi
 done
else
# If the env var SGML_CATALOG_FILES is defined, assume things are cool.
  fptools_cv_sgml_catalog="yes"
fi
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])
rm -rf conftest*
if test $fptools_cv_sgml_catalog != "no"; then
  $1=$fptools_cv_sgml_catalog
fi
])

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dnl ######################################################################
dnl FPTOOLS_SEARCH_LIBS(INCLUDES, FUNCTION, SEARCH-LIBS [, ACTION-IF-FOUND
dnl                     [, ACTION-IF-NOT-FOUND [, OTHER-LIBRARIES]]])
dnl Search for a library defining FUNC, if it's not already available.
dnl This is almost the same as AC_SEARCH_LIBS, but the INCLUDES can be
dnl specified.
dnl ######################################################################

AC_DEFUN(FPTOOLS_SEARCH_LIBS,
[AC_PREREQ([2.13])
AC_CACHE_CHECK([for library containing $2], [ac_cv_search_$2],
[ac_func_search_save_LIBS="$LIBS"
ac_cv_search_$2="no"
AC_TRY_LINK([$1], [$2()], [ac_cv_search_$2="none required"])
test "$ac_cv_search_$2" = "no" && for i in $3; do
LIBS="-l$i $6 $ac_func_search_save_LIBS"
AC_TRY_LINK([$1], [$2()],
[ac_cv_search_$2="-l$i"
break])
done
LIBS="$ac_func_search_save_LIBS"])
if test "$ac_cv_search_$2" != "no"; then
  test "$ac_cv_search_$2" = "none required" || LIBS="$ac_cv_search_$2 $LIBS"
  $4
else :
  $5
fi])

dnl ####################### -*- Mode: M4 -*- ###########################
dnl Copyright (C) 98, 1999 Matthew D. Langston <langston@SLAC.Stanford.EDU>
dnl
dnl This file is free software; you can redistribute it and/or modify it
dnl under the terms of the GNU General Public License as published by
dnl the Free Software Foundation; either version 2 of the License, or
dnl (at your option) any later version.
dnl
dnl This file is distributed in the hope that it will be useful, but
dnl WITHOUT ANY WARRANTY; without even the implied warranty of
dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
dnl General Public License for more details.
dnl
dnl You should have received a copy of the GNU General Public License
dnl along with this file; if not, write to:
dnl
dnl   Free Software Foundation, Inc.
dnl   Suite 330
dnl   59 Temple Place
dnl   Boston, MA 02111-1307, USA.
dnl ####################################################################


dnl @synopsis FPTOOLS_CHECK_LIBM
dnl 
dnl Search for math library (typically -lm).
dnl
dnl The variable LIBM (which is not an output variable by default) is
dnl set to a value which is suitable for use in a Makefile (for example,
dnl in make's LOADLIBES macro) provided you AC_SUBST it first.
dnl
dnl @author Matthew D. Langston <langston@SLAC.Stanford.EDU>

# FPTOOLS_CHECK_LIBM - check for math library
AC_DEFUN(FPTOOLS_CHECK_LIBM,
[AC_REQUIRE([AC_CANONICAL_HOST])dnl
LIBM=
case "$host" in
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*-*-beos*)
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  # These system don't have libm
  ;;
*-ncr-sysv4.3*)
  AC_CHECK_LIB(mw, _mwvalidcheckl, LIBM="-lmw")
  AC_CHECK_LIB(m, main, LIBM="$LIBM -lm")
  ;;
*)
  AC_CHECK_LIB(m, main, LIBM="-lm")
  ;;
esac
])

dnl ######################################################################
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dnl Note: Caching has been completely rewritten, but is still no perfect yet.
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dnl ######################################################################

dnl ########################### -*- Mode: M4 -*- #######################
dnl Copyright (C) 98, 1999 Matthew D. Langston <langston@SLAC.Stanford.EDU>
dnl
dnl This file is free software; you can redistribute it and/or modify it
dnl under the terms of the GNU General Public License as published by
dnl the Free Software Foundation; either version 2 of the License, or
dnl (at your option) any later version.
dnl
dnl This file is distributed in the hope that it will be useful, but
dnl WITHOUT ANY WARRANTY; without even the implied warranty of
dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
dnl General Public License for more details.
dnl
dnl You should have received a copy of the GNU General Public License
dnl along with this file; if not, write to:
dnl
dnl   Free Software Foundation, Inc.
dnl   Suite 330
dnl   59 Temple Place
dnl   Boston, MA 02111-1307, USA.
dnl ####################################################################

dnl @synopsis FPTOOLS_HAVE_OPENGL
dnl 
dnl Search for OpenGL.  We search first for Mesa (a GPL'ed version of
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dnl OpenGL) before a vendor's version of OpenGL if we were specifically
dnl asked to with `--with-Mesa=yes' or `--with-Mesa'.
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dnl
dnl The four "standard" OpenGL libraries are searched for: "-lGL",
dnl "-lGLU", "-lGLX" (or "-lMesaGL", "-lMesaGLU" as the case may be) and
dnl "-lglut".
dnl
dnl All of the libraries that are found (since "-lglut" or "-lGLX" might
dnl be missing) are added to the shell output variable "GL_LIBS", along
dnl with any other libraries that are necessary to successfully link an
dnl OpenGL application (e.g. the X11 libraries).  Care has been taken to
dnl make sure that all of the libraries in "GL_LIBS" are listed in the
dnl proper order.
dnl
dnl Additionally, the shell output variable "GL_CFLAGS" is set to any
dnl flags (e.g. "-I" flags) that are necessary to successfully compile
dnl an OpenGL application.
dnl
dnl The following shell variable (which are not output variables) are
dnl also set to either "yes" or "no" (depending on which libraries were
dnl found) to help you determine exactly what was found.
dnl
dnl   have_GL
dnl   have_GLU
dnl   have_GLX
dnl   have_glut
dnl
dnl A complete little toy "Automake `make distcheck'" package of how to
dnl use this macro is available at:
dnl
dnl   ftp://ftp.slac.stanford.edu/users/langston/autoconf/ac_opengl-0.01.tar.gz
dnl
dnl Please note that as the ac_opengl macro and the toy example evolves,
dnl the version number increases, so you may have to adjust the above
dnl URL accordingly.
dnl
dnl @author Matthew D. Langston <langston@SLAC.Stanford.EDU>

AC_DEFUN(FPTOOLS_HAVE_OPENGL,
[
  AC_REQUIRE([AC_PROG_CC])
  AC_REQUIRE([AC_PATH_X])
  AC_REQUIRE([AC_PATH_XTRA])
  AC_REQUIRE([FPTOOLS_CHECK_LIBM])

1058 1059
dnl Check for Mesa first if we were asked to.
  AC_ARG_ENABLE(Mesa,
1060 1061 1062
[  --enable-mesa
	Prefer Mesa over a vendor's native OpenGL library (default=no)
],
1063 1064
                use_Mesa=$enableval,
                use_Mesa=no)
1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079

  if test x"$use_Mesa" = xyes; then
     GL_search_list="MesaGL  GL  opengl32"
    GLU_search_list="MesaGLU GLU glu32"
    GLX_search_list="MesaGLX GLX"
  else
     GL_search_list="GL  opengl32 MesaGL"
    GLU_search_list="GLU glu32    MesaGLU"
    GLX_search_list="GLX          MesaGLX"
  fi      

  AC_LANG_SAVE
  AC_LANG_C

dnl If we are running under X11 then add in the appropriate libraries.
1080
  if test x"$no_x" != xyes; then
1081
dnl Add everything we need to compile and link X programs to GL_CFLAGS
1082
dnl and GL_X_LIBS/GLUT_X_LIBS.
1083
    GL_CFLAGS="$CPPFLAGS $X_CFLAGS"
1084 1085
    GL_X_LIBS="$X_LIBS $X_PRE_LIBS -lXext -lX11 $X_EXTRA_LIBS $LIBM"
    GLUT_X_LIBS="$X_LIBS $X_PRE_LIBS -lXmu -lXt -lXi -lXext -lX11 $X_EXTRA_LIBS $LIBM"
1086 1087 1088 1089 1090 1091 1092
  fi
  GL_save_CPPFLAGS="$CPPFLAGS"
  CPPFLAGS="$GL_CFLAGS"

  GL_save_LIBS="$LIBS"
  LIBS="$GL_X_LIBS"

1093 1094
  FPTOOLS_SEARCH_LIBS([#include <GL/gl.h>],   glEnd,         $GL_search_list,  have_GL=yes,   have_GL=no)
  FPTOOLS_SEARCH_LIBS([#include <GL/glu.h>],  gluNewQuadric, $GLU_search_list, have_GLU=yes,  have_GLU=no)
1095
  FPTOOLS_SEARCH_LIBS([#include <GL/glx.h>],  glXWaitX,      $GLX_search_list, have_GLX=yes,  have_GLX=no)
1096 1097

  if test -n "$LIBS"; then
1098
    GL_LIBS="$LDFLAGS $LIBS"
1099
  else
1100
    GL_LIBS="$LDFLAGS"
1101 1102 1103
    GL_CFLAGS=
  fi

1104 1105 1106 1107 1108 1109 1110 1111
  LIBS="$GLUT_X_LIBS"

  FPTOOLS_SEARCH_LIBS([#include <GL/glut.h>], glutMainLoop,  glut32 glut,      have_glut=yes, have_glut=no)

  if test -n "$LIBS"; then
    GLUT_LIBS="$LDFLAGS $LIBS"
  fi

1112 1113 1114 1115 1116 1117
  AC_CACHE_CHECK([OpenGL flags], mdl_cv_gl_cflags, [mdl_cv_gl_cflags="$GL_CFLAGS"])
  GL_CFLAGS="$mdl_cv_gl_cflags"
  AC_SUBST(GL_CFLAGS)
  AC_CACHE_CHECK([OpenGL libs],  mdl_cv_gl_libs,   [mdl_cv_gl_libs="$GL_LIBS"])
  GL_LIBS="$mdl_cv_gl_libs"
  AC_SUBST(GL_LIBS)
1118 1119 1120
  AC_CACHE_CHECK([GLUT libs],  mdl_cv_glut_libs,   [mdl_cv_glut_libs="$GLUT_LIBS"])
  GLUT_LIBS="$mdl_cv_glut_libs"
  AC_SUBST(GLUT_LIBS)
1121

1122
dnl Reset GL_X_LIBS/GLUT_X_LIBS regardless, since they were just temporary variables
1123 1124
dnl and we don't want to be global namespace polluters.
  GL_X_LIBS=
1125
  GLUT_X_LIBS=
1126 1127 1128 1129 1130 1131

  LIBS="$GL_save_LIBS"
  CPPFLAGS="$GL_save_CPPFLAGS"

  AC_LANG_RESTORE
])
1132 1133

# LocalWords:  fi