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# Autoconf M4 include file defining utility macros for complex Canadian

# cross builds.

dnl ####

dnl # _GCC_TOPLEV_NONCANONICAL_BUILD

dnl # $build_alias or canonical $build if blank.

dnl # Used when we would use $build_alias, but empty is not OK.

AC_DEFUN([_GCC_TOPLEV_NONCANONICAL_BUILD],

[AC_REQUIRE([AC_CANONICAL_BUILD]) []dnl

case ${build_alias} in

  "") build_noncanonical=${build} ;;

  *) build_noncanonical=${build_alias} ;;

esac

]) []dnl # _GCC_TOPLEV_NONCANONICAL_BUILD

dnl ####

dnl # _GCC_TOPLEV_NONCANONICAL_HOST

dnl # $host_alias, or $build_noncanonical if blank.

dnl # Used when we would use $host_alias, but empty is not OK.

AC_DEFUN([_GCC_TOPLEV_NONCANONICAL_HOST],

[AC_REQUIRE([_GCC_TOPLEV_NONCANONICAL_BUILD]) []dnl

case ${host_alias} in

  "") host_noncanonical=${build_noncanonical} ;;

  *) host_noncanonical=${host_alias} ;;

esac

]) []dnl # _GCC_TOPLEV_NONCANONICAL_HOST

dnl ####

dnl # _GCC_TOPLEV_NONCANONICAL_TARGET

dnl # $target_alias or $host_noncanonical if blank.

dnl # Used when we would use $target_alias, but empty is not OK.

AC_DEFUN([_GCC_TOPLEV_NONCANONICAL_TARGET],

[AC_REQUIRE([_GCC_TOPLEV_NONCANONICAL_HOST]) []dnl

case ${target_alias} in

  "") target_noncanonical=${host_noncanonical} ;;

  *) target_noncanonical=${target_alias} ;;

esac

]) []dnl # _GCC_TOPLEV_NONCANONICAL_TARGET

dnl ####

dnl # ACX_NONCANONICAL_BUILD

dnl # Like underscored version, but AC_SUBST's.

AC_DEFUN([ACX_NONCANONICAL_BUILD],

[AC_REQUIRE([_GCC_TOPLEV_NONCANONICAL_BUILD]) []dnl

AC_SUBST(build_noncanonical)

]) []dnl # ACX_NONCANONICAL_BUILD

dnl ####

dnl # ACX_NONCANONICAL_HOST

dnl # Like underscored version, but AC_SUBST's.

AC_DEFUN([ACX_NONCANONICAL_HOST],

[AC_REQUIRE([_GCC_TOPLEV_NONCANONICAL_HOST]) []dnl

AC_SUBST(host_noncanonical)

]) []dnl # ACX_NONCANONICAL_HOST

dnl ####

dnl # ACX_NONCANONICAL_TARGET

dnl # Like underscored version, but AC_SUBST's.

AC_DEFUN([ACX_NONCANONICAL_TARGET],

[AC_REQUIRE([_GCC_TOPLEV_NONCANONICAL_TARGET]) []dnl

AC_SUBST(target_noncanonical)

]) []dnl # ACX_NONCANONICAL_TARGET

dnl ####

dnl # GCC_TOPLEV_SUBDIRS

dnl # GCC & friends build 'build', 'host', and 'target' tools.  These must

dnl # be separated into three well-known subdirectories of the build directory:

dnl # build_subdir, host_subdir, and target_subdir.  The values are determined

dnl # here so that they can (theoretically) be changed in the future.  They

dnl # were previously reproduced across many different files.

dnl #

dnl # This logic really amounts to very little with autoconf 2.13; it will

dnl # amount to a lot more with autoconf 2.5x.

AC_DEFUN([GCC_TOPLEV_SUBDIRS],

[AC_REQUIRE([_GCC_TOPLEV_NONCANONICAL_TARGET]) []dnl

AC_REQUIRE([_GCC_TOPLEV_NONCANONICAL_BUILD]) []dnl

# post-stage1 host modules use a different CC_FOR_BUILD so, in order to

# have matching libraries, they should use host libraries: Makefile.tpl

# arranges to pass --with-build-libsubdir=$(HOST_SUBDIR).

# However, they still use the build modules, because the corresponding

# host modules (e.g. bison) are only built for the host when bootstrap

# finishes. So:

# - build_subdir is where we find build modules, and never changes.

# - build_libsubdir is where we find build libraries, and can be overridden.

# Prefix 'build-' so this never conflicts with target_subdir.

build_subdir="build-${build_noncanonical}"

AC_ARG_WITH(build-libsubdir,

[  --with-build-libsubdir=[DIR]  Directory where to find libraries for build system],

build_libsubdir="$withval",

build_libsubdir="$build_subdir")

# --srcdir=. covers the toplevel, while "test -d" covers the subdirectories

if ( test $srcdir = . && test -d gcc ) \

   || test -d $srcdir/../host-${host_noncanonical}; then

  host_subdir="host-${host_noncanonical}"

else

  host_subdir=.

fi

# No prefix.

target_subdir=${target_noncanonical}

AC_SUBST([build_libsubdir]) []dnl

AC_SUBST([build_subdir]) []dnl

AC_SUBST([host_subdir]) []dnl

AC_SUBST([target_subdir]) []dnl

]) []dnl # GCC_TOPLEV_SUBDIRS

####

# _NCN_TOOL_PREFIXES:  Some stuff that oughtta be done in AC_CANONICAL_SYSTEM

# or AC_INIT.

# These demand that AC_CANONICAL_SYSTEM be called beforehand.

AC_DEFUN([_NCN_TOOL_PREFIXES],

[ncn_tool_prefix=

test -n "$host_alias" && ncn_tool_prefix=$host_alias-

ncn_target_tool_prefix=

test -n "$target_alias" && ncn_target_tool_prefix=$target_alias-

]) []dnl # _NCN_TOOL_PREFIXES

####

# NCN_STRICT_CHECK_TOOLS(variable, progs-to-check-for,[value-if-not-found],[path])

# Like plain AC_CHECK_TOOLS, but require prefix if build!=host.

AC_DEFUN([NCN_STRICT_CHECK_TOOLS],

[AC_REQUIRE([_NCN_TOOL_PREFIXES]) []dnl

AC_ARG_VAR([$1], [$1 for the host])

if test -n "[$]$1"; then

  ac_cv_prog_$1=[$]$1

elif test -n "$ac_cv_prog_$1"; then

  $1=$ac_cv_prog_$1

fi

if test -n "$ac_cv_prog_$1"; then

  for ncn_progname in $2; do

    AC_CHECK_PROG([$1], [${ncn_progname}], [${ncn_progname}], , [$4])

  done

fi

for ncn_progname in $2; do

  if test -n "$ncn_tool_prefix"; then

    AC_CHECK_PROG([$1], [${ncn_tool_prefix}${ncn_progname}],

                  [${ncn_tool_prefix}${ncn_progname}], , [$4])

  fi

  if test -z "$ac_cv_prog_$1" && test $build = $host ; then

    AC_CHECK_PROG([$1], [${ncn_progname}], [${ncn_progname}], , [$4])

  fi

  test -n "$ac_cv_prog_$1" && break

done

if test -z "$ac_cv_prog_$1" ; then

  ifelse([$3],[], [set dummy $2

  if test $build = $host ; then

    $1="[$]2"

  else

    $1="${ncn_tool_prefix}[$]2"

  fi], [$1="$3"])

fi

]) []dnl # NCN_STRICT_CHECK_TOOLS

####

# NCN_STRICT_CHECK_TARGET_TOOLS(variable, progs-to-check-for,[value-if-not-found],[path])

# Like CVS Autoconf AC_CHECK_TARGET_TOOLS, but require prefix if build!=target.

AC_DEFUN([NCN_STRICT_CHECK_TARGET_TOOLS],

[AC_REQUIRE([_NCN_TOOL_PREFIXES]) []dnl

AC_ARG_VAR([$1], patsubst([$1], [_FOR_TARGET$], [])[ for the target])

if test -n "[$]$1"; then

  ac_cv_prog_$1=[$]$1

elif test -n "$ac_cv_prog_$1"; then

  $1=$ac_cv_prog_$1

fi

if test -n "$ac_cv_prog_$1"; then

  for ncn_progname in $2; do

    AC_CHECK_PROG([$1], [${ncn_progname}], [${ncn_progname}], , [$4])

  done

fi

if test -z "$ac_cv_prog_$1" && test -n "$with_build_time_tools"; then

  for ncn_progname in $2; do

    AC_MSG_CHECKING([for ${ncn_progname} in $with_build_time_tools])

    if test -x $with_build_time_tools/${ncn_progname}; then

      ac_cv_prog_$1=$with_build_time_tools/${ncn_progname}

      AC_MSG_RESULT(yes)

      break

    else

      AC_MSG_RESULT(no)

    fi

  done

fi

if test -z "$ac_cv_prog_$1"; then

  for ncn_progname in $2; do

    if test -n "$ncn_target_tool_prefix"; then

      AC_CHECK_PROG([$1], [${ncn_target_tool_prefix}${ncn_progname}],

                    [${ncn_target_tool_prefix}${ncn_progname}], , [$4])

    fi

    if test -z "$ac_cv_prog_$1" && test $build = $target ; then

      AC_CHECK_PROG([$1], [${ncn_progname}], [${ncn_progname}], , [$4])

    fi

    test -n "$ac_cv_prog_$1" && break

  done

fi

if test -z "$ac_cv_prog_$1" ; then

  ifelse([$3],[], [set dummy $2

  if test $build = $target ; then

    $1="[$]2"

  else

    $1="${ncn_target_tool_prefix}[$]2"

  fi], [$1="$3"])

else

  $1="$ac_cv_prog_$1"

fi

]) []dnl # NCN_STRICT_CHECK_TARGET_TOOLS

# Backported from Autoconf 2.5x; can go away when and if

# we switch.  Put the OS path separator in $PATH_SEPARATOR.

AC_DEFUN([ACX_PATH_SEP], [

# The user is always right.

if test "${PATH_SEPARATOR+set}" != set; then

  echo "#! /bin/sh" >conf$$.sh

  echo  "exit 0"   >>conf$$.sh

  chmod +x conf$$.sh

  if (PATH="/nonexistent;."; conf$$.sh) >/dev/null 2>&1; then

    PATH_SEPARATOR=';'

  else

    PATH_SEPARATOR=:

  fi

  rm -f conf$$.sh

fi

])

AC_DEFUN([ACX_TOOL_DIRS], [

AC_REQUIRE([ACX_PATH_SEP])

if test "x$exec_prefix" = xNONE; then

        if test "x$prefix" = xNONE; then

                gcc_cv_tool_prefix=$ac_default_prefix

        else

                gcc_cv_tool_prefix=$prefix

        fi

else

        gcc_cv_tool_prefix=$exec_prefix

fi

# If there is no compiler in the tree, use the PATH only.  In any

# case, if there is no compiler in the tree nobody should use

# AS_FOR_TARGET and LD_FOR_TARGET.

if test x$host = x$build && test -f $srcdir/gcc/BASE-VER; then

    gcc_version=`cat $srcdir/gcc/BASE-VER`

    gcc_cv_tool_dirs="$gcc_cv_tool_prefix/libexec/gcc/$target_noncanonical/$gcc_version$PATH_SEPARATOR"

    gcc_cv_tool_dirs="$gcc_cv_tool_dirs$gcc_cv_tool_prefix/libexec/gcc/$target_noncanonical$PATH_SEPARATOR"

    gcc_cv_tool_dirs="$gcc_cv_tool_dirs/usr/lib/gcc/$target_noncanonical/$gcc_version$PATH_SEPARATOR"

    gcc_cv_tool_dirs="$gcc_cv_tool_dirs/usr/lib/gcc/$target_noncanonical$PATH_SEPARATOR"

    gcc_cv_tool_dirs="$gcc_cv_tool_dirs$gcc_cv_tool_prefix/$target_noncanonical/bin/$target_noncanonical/$gcc_version$PATH_SEPARATOR"

    gcc_cv_tool_dirs="$gcc_cv_tool_dirs$gcc_cv_tool_prefix/$target_noncanonical/bin$PATH_SEPARATOR"

else

    gcc_cv_tool_dirs=

fi

if test x$build = x$target && test -n "$md_exec_prefix"; then

        gcc_cv_tool_dirs="$gcc_cv_tool_dirs$md_exec_prefix$PATH_SEPARATOR"

fi

]) []dnl # ACX_TOOL_DIRS

# ACX_HAVE_GCC_FOR_TARGET

# Check if the variable GCC_FOR_TARGET really points to a GCC binary.

AC_DEFUN([ACX_HAVE_GCC_FOR_TARGET], [

cat > conftest.c << \EOF

#ifdef __GNUC__

  gcc_yay;

#endif

EOF

if ($GCC_FOR_TARGET -E conftest.c | grep gcc_yay) > /dev/null 2>&1; then

  have_gcc_for_target=yes

else

  GCC_FOR_TARGET=${ncn_target_tool_prefix}gcc

  have_gcc_for_target=no

fi

rm conftest.c

])

# ACX_CHECK_INSTALLED_TARGET_TOOL(VAR, PROG)

# Searching for installed target binutils.  We need to take extra care,

# else we may find the wrong assembler, linker, etc., and lose.

#

# First try --with-build-time-tools, if specified.

#

# For build != host, we ask the installed GCC for the name of the tool it

# uses, and accept it if it is an absolute path.  This is because the

# only good choice for a compiler is the same GCC version that is being

# installed (or we couldn't make target libraries), and we assume that

# on the host system we'll have not only the same GCC version, but also

# the same binutils version.

#

# For build == host, search the same directories that the installed

# compiler will search.  We used to do this for the assembler, linker,

# and nm only; for simplicity of configuration, however, we extend this

# criterion to tools (such as ar and ranlib) that are never invoked by

# the compiler, to avoid mismatches.

#

# Also note we have to check MD_EXEC_PREFIX before checking the user's path

# if build == target.  This makes the most sense only when bootstrapping,

# but we also do so when build != host.  In this case, we hope that the

# build and host systems will have similar contents of MD_EXEC_PREFIX.

#

# If we do not find a suitable binary, then try the user's path.

AC_DEFUN([ACX_CHECK_INSTALLED_TARGET_TOOL], [

AC_REQUIRE([ACX_TOOL_DIRS])

AC_REQUIRE([ACX_HAVE_GCC_FOR_TARGET])

if test -z "$ac_cv_path_$1" ; then

  if test -n "$with_build_time_tools"; then

    AC_MSG_CHECKING([for $2 in $with_build_time_tools])

    if test -x $with_build_time_tools/$2; then

      $1=`cd $with_build_time_tools && pwd`/$2

      ac_cv_path_$1=[$]$1

      AC_MSG_RESULT([$ac_cv_path_$1])

    else

      AC_MSG_RESULT(no)

    fi

  elif test $build != $host && test $have_gcc_for_target = yes; then

    $1=`$GCC_FOR_TARGET --print-prog-name=$2`

    test [$]$1 = $2 && $1=

    test -n "[$]$1" && ac_cv_path_$1=[$]$1

  fi

fi

if test -z "$ac_cv_path_$1" && test -n "$gcc_cv_tool_dirs"; then

  AC_PATH_PROG([$1], [$2], [], [$gcc_cv_tool_dirs])

fi

if test -z "$ac_cv_path_$1" ; then

  NCN_STRICT_CHECK_TARGET_TOOLS([$1], [$2])

else

  $1=$ac_cv_path_$1

fi

]) []dnl # ACX_CHECK_INSTALLED_TARGET_TOOL

###

# AC_PROG_CPP_WERROR

# Used for autoconf 2.5x to force AC_PREPROC_IFELSE to reject code which

# triggers warnings from the preprocessor.  Will be in autoconf 2.58.

# For now, using this also overrides header checks to use only the

# preprocessor (matches 2.13 behavior; matching 2.58's behavior is a

# bit harder from here).

# Eventually autoconf will default to checking headers with the compiler

# instead, and we'll have to do this differently.

AC_DEFUN([AC_PROG_CPP_WERROR],

[AC_REQUIRE([AC_PROG_CPP])dnl

m4_define([AC_CHECK_HEADER],m4_defn([_AC_CHECK_HEADER_OLD]))

ac_c_preproc_warn_flag=yes])# AC_PROG_CPP_WERROR

# Test for GNAT.

# We require the gnatbind program, and a compiler driver that

# understands Ada.  We use the user's CC setting, already found,

# and possibly add $1 to the command-line parameters.

#

# Sets the shell variable have_gnat to yes or no as appropriate, and

# substitutes GNATBIND and GNATMAKE.

AC_DEFUN([ACX_PROG_GNAT],

[AC_REQUIRE([AC_CHECK_TOOL_PREFIX])

AC_REQUIRE([AC_PROG_CC])

AC_CHECK_TOOL(GNATBIND, gnatbind, no)

AC_CHECK_TOOL(GNATMAKE, gnatmake, no)

AC_CACHE_CHECK([whether compiler driver understands Ada],

                 acx_cv_cc_gcc_supports_ada,

[cat >conftest.adb <<EOF

procedure conftest is begin null; end conftest;

EOF

acx_cv_cc_gcc_supports_ada=no

# There is a bug in old released versions of GCC which causes the

# driver to exit successfully when the appropriate language module

# has not been installed.  This is fixed in 2.95.4, 3.0.2, and 3.1.

# Therefore we must check for the error message as well as an

# unsuccessful exit.

# Other compilers, like HP Tru64 UNIX cc, exit successfully when

# given a .adb file, but produce no object file.  So we must check

# if an object file was really produced to guard against this.

errors=`(${CC} $1[]m4_ifval([$1], [ ])-c conftest.adb) 2>&1 || echo failure`

if test x"$errors" = x && test -f conftest.$ac_objext; then

  acx_cv_cc_gcc_supports_ada=yes

fi

rm -f conftest.*])

if test x$GNATBIND != xno && test x$GNATMAKE != xno && test x$acx_cv_cc_gcc_supports_ada != xno; then

  have_gnat=yes

else

  have_gnat=no

fi

])

dnl 'make compare' can be significantly faster, if cmp itself can

dnl skip bytes instead of using tail.  The test being performed is

dnl "if cmp --ignore-initial=2 t1 t2 && ! cmp --ignore-initial=1 t1 t2"

dnl but we need to sink errors and handle broken shells.  We also test

dnl for the parameter format "cmp file1 file2 skip1 skip2" which is

dnl accepted by cmp on some systems.

AC_DEFUN([ACX_PROG_CMP_IGNORE_INITIAL],

[AC_CACHE_CHECK([how to compare bootstrapped objects], gcc_cv_prog_cmp_skip,

[ echo abfoo >t1

  echo cdfoo >t2

  gcc_cv_prog_cmp_skip='tail +16c $$f1 > tmp-foo1; tail +16c $$f2 > tmp-foo2; cmp tmp-foo1 tmp-foo2'

  if cmp t1 t2 2 2 > /dev/null 2>&1; then

    if cmp t1 t2 1 1 > /dev/null 2>&1; then

      :

    else

      gcc_cv_prog_cmp_skip='cmp $$f1 $$f2 16 16'

    fi

  fi

  if cmp --ignore-initial=2 t1 t2 > /dev/null 2>&1; then

    if cmp --ignore-initial=1 t1 t2 > /dev/null 2>&1; then

      :

    else

      gcc_cv_prog_cmp_skip='cmp --ignore-initial=16 $$f1 $$f2'

    fi

  fi

  rm t1 t2

])

do_compare="$gcc_cv_prog_cmp_skip"

AC_SUBST(do_compare)

])

dnl See whether we can include both string.h and strings.h.

AC_DEFUN([ACX_HEADER_STRING],

[AC_CACHE_CHECK([whether string.h and strings.h may both be included],

  gcc_cv_header_string,

[AC_TRY_COMPILE([#include <string.h>

#include <strings.h>], , gcc_cv_header_string=yes, gcc_cv_header_string=no)])

if test $gcc_cv_header_string = yes; then

  AC_DEFINE(STRING_WITH_STRINGS, 1, [Define if you can safely include both <string.h> and <strings.h>.])

fi

])

dnl See if stdbool.h properly defines bool and true/false.

dnl Check whether _Bool is built-in.

AC_DEFUN([ACX_HEADER_STDBOOL],

[AC_CACHE_CHECK([for working stdbool.h],

  ac_cv_header_stdbool_h,

[AC_TRY_COMPILE([#include <stdbool.h>],

[bool foo = false;],

ac_cv_header_stdbool_h=yes, ac_cv_header_stdbool_h=no)])

if test $ac_cv_header_stdbool_h = yes; then

  AC_DEFINE(HAVE_STDBOOL_H, 1,

  [Define if you have a working <stdbool.h> header file.])

fi

AC_CACHE_CHECK(for built-in _Bool, gcc_cv_c__bool,

[AC_TRY_COMPILE(,

[_Bool foo;],

gcc_cv_c__bool=yes, gcc_cv_c__bool=no)

])

if test $gcc_cv_c__bool = yes; then

  AC_DEFINE(HAVE__BOOL, 1, [Define if the \`_Bool' type is built-in.])

fi

])

dnl See if hard links work and if not, try to substitute $1 or simple copy.

AC_DEFUN([ACX_PROG_LN],

[AC_MSG_CHECKING(whether ln works)

AC_CACHE_VAL(acx_cv_prog_LN,

[rm -f conftestdata_t

echo >conftestdata_f

if ln conftestdata_f conftestdata_t 2>/dev/null

then

  acx_cv_prog_LN=ln

else

  acx_cv_prog_LN=no

fi

rm -f conftestdata_f conftestdata_t

])dnl

if test $acx_cv_prog_LN = no; then

  LN="ifelse([$1],,cp,[$1])"

  AC_MSG_RESULT([no, using $LN])

else

  LN="$acx_cv_prog_LN"

  AC_MSG_RESULT(yes)

fi

AC_SUBST(LN)dnl

])

dnl GCC_TARGET_TOOL(PROGRAM, TARGET-VAR, HOST-VAR, IN-TREE-TOOL, LANGUAGE)

AC_DEFUN([GCC_TARGET_TOOL],

[AC_MSG_CHECKING(where to find the target $1)

if test "x${build}" != "x${host}" ; then

  if expr "x[$]$2" : "x/" > /dev/null; then

    # We already found the complete path

    ac_dir=`dirname [$]$2`

    AC_MSG_RESULT(pre-installed in $ac_dir)

  else

    # Canadian cross, just use what we found

    AC_MSG_RESULT(pre-installed)

  fi

else

  ifelse([$4],,,

  [ok=yes

  case " ${configdirs} " in

    *" patsubst([$4], [/.*], []) "*) ;;

    *) ok=no ;;

  esac

  ifelse([$5],,,

  [case ,${enable_languages}, in

    *,$5,*) ;;

    *) ok=no ;;

  esac])

  if test $ok = yes; then

    # An in-tree tool is available and we can use it

    $2='$$r/$(HOST_SUBDIR)/$4'

    AC_MSG_RESULT(just compiled)

  el])if expr "x[$]$2" : "x/" > /dev/null; then

    # We already found the complete path

    ac_dir=`dirname [$]$2`

    AC_MSG_RESULT(pre-installed in $ac_dir)

  elif test "x$target" = "x$host"; then

    # We can use an host tool

    $2='$($3)'

    AC_MSG_RESULT(host tool)

  else

    # We need a cross tool

    AC_MSG_RESULT(pre-installed)

  fi

fi

AC_SUBST($2)])

dnl Locate a program and check that its version is acceptable.

dnl ACX_PROG_CHECK_VER(var, name, version-switch,

dnl                    version-extract-regexp, version-glob)

AC_DEFUN([ACX_CHECK_PROG_VER],[

  AC_CHECK_PROG([$1], [$2], [$2])

  if test -n "[$]$1"; then

    # Found it, now check the version.

    AC_CACHE_CHECK([for modern $2],

                   [gcc_cv_prog_$2_modern],

                   [ac_prog_version=`eval [$]$1 $3 2>&1 |

                                     sed -n 's/^.*patsubst([[$4]],/,\/).*$/\1/p'`

                    [case $ac_prog_version in

                      '')  gcc_cv_prog_$2_modern=no;;

                      $5)  gcc_cv_prog_$2_modern=yes;;

                      *)   gcc_cv_prog_$2_modern=no;;

                    esac]

                   ])

  else

    gcc_cv_prog_$2_modern=no

  fi

  if test $gcc_cv_prog_$2_modern = no; then

    $1="${CONFIG_SHELL-/bin/sh} $ac_aux_dir/missing $2"

  fi

])

dnl Support the --with-pkgversion configure option.

dnl ACX_PKGVERSION(default-pkgversion)

AC_DEFUN([ACX_PKGVERSION],[

  AC_ARG_WITH(pkgversion,

    AS_HELP_STRING([--with-pkgversion=PKG],

                   [Use PKG in the version string in place of "$1"]),

    [case "$withval" in

      yes) AC_MSG_ERROR([package version not specified]) ;;

      no)  PKGVERSION= ;;

      *)   PKGVERSION="($withval) " ;;

     esac],

    PKGVERSION="($1) "

  )

  AC_SUBST(PKGVERSION)

])

dnl Support the --with-bugurl configure option.

dnl ACX_BUGURL(default-bugurl)

AC_DEFUN([ACX_BUGURL],[

  AC_ARG_WITH(bugurl,

    AS_HELP_STRING([--with-bugurl=URL],

                   [Direct users to URL to report a bug]),

    [case "$withval" in

      yes) AC_MSG_ERROR([bug URL not specified]) ;;

      no)  BUGURL=

           ;;

      *)   BUGURL="$withval"

           ;;

     esac],

     BUGURL="$1"

  )

  case ${BUGURL} in

  "")

    REPORT_BUGS_TO=

    REPORT_BUGS_TEXI=

    ;;

  *)

    REPORT_BUGS_TO="<$BUGURL>"

    REPORT_BUGS_TEXI=@uref{`echo "$BUGURL" | sed 's/@/@@/g'`}

    ;;

  esac;

  AC_SUBST(REPORT_BUGS_TO)

  AC_SUBST(REPORT_BUGS_TEXI)

])

dnl ####

dnl # ACX_CHECK_CYGWIN_CAT_WORKS

dnl # On Cygwin hosts, check that the cat command ignores

dnl # carriage returns as otherwise builds will not work.

dnl # See binutils PR 4334 for more details.

AC_DEFUN([ACX_CHECK_CYGWIN_CAT_WORKS],[

AC_MSG_CHECKING([to see if cat works as expected])

echo a >cygwin-cat-check

if test `cat cygwin-cat-check` == a ; then

  rm cygwin-cat-check

  AC_MSG_RESULT(yes)

else

  rm cygwin-cat-check

  AC_MSG_RESULT(no)

  AC_MSG_ERROR([The cat command does not ignore carriage return characters.

  Please either mount the build directory in binary mode or run the following

  commands before running any configure script:

set -o igncr

export SHELLOPTS

  ])

fi

])