configure.ac

# Process this file with autoconf to produce a configure script.

# Copyright (C) 1995-2013 Free Software Foundation, Inc.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

dnl  Since this is a Starlink-customised version of automake, change the
dnl  package name and bug-reporting address.  Unlike autoconf, automake
dnl  version numbers can include a fork element in the version number,
dnl  so include one.
dnl
dnl  Include the TARNAME field, not because we want to distribute
dnl  this package, but so that autoconf uses this when building some
dnl  installation locations rather than the "starlink-automake" it
dnl  would otherwise construct.
AC_INIT([Starlink Automake], [1.14.1-starlink], [starlink@jiscmail.ac.uk], automake)

AC_PREREQ([2.69])
dnl AC_INIT([GNU Automake], [1.14.1], [bug-automake@gnu.org])

AC_CONFIG_SRCDIR([bin/automake.in])
AC_CONFIG_AUX_DIR([lib])

AM_SILENT_RULES([yes])

AC_CANONICAL_HOST
AC_CANONICAL_BUILD

# Save the AUTOCONF setting before AM_INIT_AUTOMAKE overrides it; this
# way we can run Autoconf tests from configure (or from the test
# suite) without being bothered by 'missing'.  Likewise for autom4te,
# autoreconf, autoheader, and autoupdate.
AC_SUBST([am_AUTOCONF], ["${AUTOCONF-autoconf}"])
AC_SUBST([am_AUTOM4TE], ["${AUTOM4TE-autom4te}"])
AC_SUBST([am_AUTORECONF], ["${AUTORECONF-autoreconf}"])
AC_SUBST([am_AUTOHEADER], ["${AUTOHEADER-autoheader}"])
AC_SUBST([am_AUTOUPDATE], ["${AUTOUPDATE-autoupdate}"])

dnl We call AC_PROG_CC in an unusual way, and only for use in our
dnl testsuite, so also use 'no-dependencies' and 'no-define' among
dnl the automake options to avoid bloating and potential problems.
AM_INIT_AUTOMAKE([-Wall -Werror dist-xz filename-length-max=99
                  no-define no-dependencies])

# Keep this on a line of its own, since it must be found and processed
# by the 'update-copyright' rule in our Makefile.
RELEASE_YEAR=2013
AC_SUBST([RELEASE_YEAR])

# The API version is the base version.  We must guarantee
# compatibility for all releases with the same API version.
# Our current rule is that:
# * All releases, including the prereleases, in an X.Y series
#   are compatible.  So 1.5.1c is compatible with 1.5.
# * Prereleases on the trunk are all incompatible -- 1.5b and 1.5c
#   aren't the same.
APIVERSION=`echo "$VERSION" | sed -e 's/^\([[0-9]]*\.[[0-9]]*[[a-z]]*\).*$/\1/'`
AC_SUBST([APIVERSION])

AC_SUBST([pkgvdatadir], ["\${datadir}/$PACKAGE-$APIVERSION"])
AC_SUBST([scriptdir], ["\${pkgvdatadir}"])
AC_SUBST([amdir], ["\${pkgvdatadir}/am"])
AC_SUBST([automake_acdir], ["\${datadir}/aclocal-$APIVERSION"])
AC_SUBST([system_acdir], ["\${datadir}/aclocal"])

# Our build system is bootstrapped with the bleeding-edge versions of
# aclocal and automake, hence the remake rules must use those versions
# as well.  The extra quoting is to cater to cases when the build
# directory contains whitespace or shell metacharacters.
ACLOCAL="\"`pwd`/t/wrap/aclocal-$APIVERSION\""
AUTOMAKE="\"`pwd`/t/wrap/automake-$APIVERSION\""

AC_PROG_LN_S

AC_PATH_PROG([PERL], [perl])
if test -z "$PERL"; then
   AC_MSG_ERROR([perl not found])
fi
# Save details about the selected perl interpreter in config.log.
AM_RUN_LOG([$PERL --version])
$PERL -e 'require 5.006;' || {
   AC_MSG_ERROR(
[perl 5.6 or better is required; perl 5.8.2 or better
is recommended.  If you have several perl versions
installed, select the one Automake should use using
  ./configure PERL=/path/to/perl])
}

# The test suite will skip some tests if tex is absent.
AC_CHECK_PROG([TEX], [tex], [tex])
# Save details about the selected TeX program in config.log.
# Redirect input from /dev/null, as TeX might otherwise hang waiting
# for input from the terminal.
AM_RUN_LOG([$TEX --version </dev/null])

# The test suite will skip some tests if no lex or yacc program is
# available.
# We don't use AC_PROG_LEX nor AC_PROG_YACC here because:
#  1. we don't want flex (resp. bison) to be preferred to system lex
#     (resp. system yacc);
#  2. we don't want $LEX (resp. $YACC) to be defined to ':' (resp. 'yacc')
#     by default;
#  3. we prefer not to have the variables YFLAGS, LEX_OUTPUT_ROOT and
#     LEXLIB to be calculated and/or AC_SUBST'd;
#  4. we prefer that the YACC and LEX variables are not reported in the
#     configure help screen.
AC_CHECK_PROGS([YACC], [yacc byacc 'bison -y'], [false])
AC_CHECK_PROGS([LEX], [lex flex], [false])

# Test for Autoconf.  We run Autoconf in a subdirectory to ease
# deletion of any files created (such as those added to
# autom4te.cache).  We used to perform only the last of the three
# following tests, but some users were unable to figure out that their
# installation was broken since --version appeared to work.

AC_SUBST([required_autoconf_version], [2.65])
AC_CACHE_CHECK([whether autoconf is installed], [am_cv_autoconf_installed],
[if AM_RUN_LOG([$am_AUTOCONF --version]);
then
  am_cv_autoconf_installed=yes
else
  am_cv_autoconf_installed=no
fi])
if test "$am_cv_autoconf_installed" = no; then
  AC_MSG_ERROR([Autoconf $required_autoconf_version or better is required.
    Please make sure it is installed and in your PATH.])
fi

AC_CACHE_CHECK([whether autoconf works], [am_cv_autoconf_works],
[mkdir conftest
echo 'AC''_INIT' > conftest/conftest.ac
if AM_RUN_LOG([cd conftest && $am_AUTOCONF -o /dev/null conftest.ac]);
then
  am_cv_autoconf_works=yes
else
  am_cv_autoconf_works=no
fi
rm -rf conftest])
if test "$am_cv_autoconf_works" = no; then
  AC_MSG_ERROR([The installed version of autoconf does not work.
    Please check config.log for error messages before this one.])
fi

AC_CACHE_CHECK([whether autoconf is recent enough], [am_cv_autoconf_version],
[mkdir conftest
dnl Creative quoting required to avoid spurious expansion of AC_PREREQ macro
echo 'AC'"_PREREQ([[$required_autoconf_version]])" > conftest/conftest.ac
if AM_RUN_LOG([cd conftest && $am_AUTOCONF -o /dev/null conftest.ac]);
then
  am_cv_autoconf_version=yes
else
  am_cv_autoconf_version=no
fi
rm -rf conftest])
if test "$am_cv_autoconf_version" = no; then
  AC_MSG_ERROR([Autoconf $required_autoconf_version or better is required.])
fi

# Test for ln.  We need use it to install the versioned binaries.
AC_MSG_CHECKING([whether ln works])
AC_CACHE_VAL([am_cv_prog_ln], [
rm -f conftest conftest.file
: >conftest.file
if ln conftest.file conftest 2>/dev/null; then
  am_cv_prog_ln=ln
else
  am_cv_prog_ln='cp -p'
fi
rm -f conftest conftest.file])
AC_SUBST([LN], [$am_cv_prog_ln])
result=no
test "x$am_cv_prog_ln" = xln && result=yes
AC_MSG_RESULT([$result])

# The amount we should wait after modifying files depends on the platform.
# On Windows '95, '98 and ME, files modifications have 2-seconds
# granularity and can be up to 3 seconds in the future w.r.t. the
# system clock.  When it is important to ensure one file is older
# than another we wait at least 5 seconds between creations.
case $build in
  *-pc-msdosdjgpp) MODIFICATION_DELAY=5;;
  *)               MODIFICATION_DELAY=2;;
esac
AC_SUBST([MODIFICATION_DELAY])

## ------------------------------------------- ##
##  Test for things needed by the test suite.  ##
## ------------------------------------------- ##

AC_PROG_EGREP
AC_PROG_FGREP

dnl FIXME: could we extract this in a simpler way through autoconf
dnl FIXME: idioms or internals?
AC_DEFUN(
  [_AM_INIT_BOURNE_COMPATIBLE_VAR],
  [am_bourne_compatible="AS_ESCAPE(_m4_expand([AS_BOURNE_COMPATIBLE]))"])

dnl
dnl Arguments to this macro:
dnl
dnl   $1 - shell to test
dnl   $2 - description of the tested feature
dnl   $3 - shell code used to check the feature; to indicate success,
dnl        it can either exit with status 77, or have the last command
dnl        returning with exit status of zero
dnl   $4 - shell code to execute if the check on the shell is successful
dnl        (defaults to nothing)
dnl   $5 - shell code to execute if the check on the shell is not
dnl        successful (defaults to nothing)
dnl
AC_DEFUN([_AM_CHECK_SHELL_FEATURE],
  [AC_REQUIRE([_AM_INIT_BOURNE_COMPATIBLE_VAR])
  AC_MSG_CHECKING([whether $1 $2])
  if { $1 -c "$am_bourne_compatible
AS_ESCAPE([$3])
test \$? -eq 0 || exit 1
# Use 77 to indicate success (rather than 0), in case some shell
# acts like Solaris 10's /bin/sh, exiting successfully on some
# syntax errors.
exit 77" >&AS_MESSAGE_LOG_FD 2>&1; test $? -eq 77; }
  then
    AC_MSG_RESULT([yes])
    $4
  else
    AC_MSG_RESULT([no])
    $5
  fi])

# AM_CHECK_CANDIDATE_TEST_SHELL(SHELL-PATH)
# -----------------------------------------
#
# Check if the given shell is good enough to run our test scripts.
# Inspired to gnulib's 'tests/init.sh'.
#
# We require POSIX and XSI features (e.g., '$(...)' for command
# substitutions, '$((...))' for shell arithmetic, and support for
# '${var#...}' and '${var%...}' parameter expansions).
#
# We require that the shell can correctly trap EXIT when 'set -e' is in
# effect (OSF1/Tru64 sh failed to do so, see commit v1.10b-52-g9fe8259).
#
# We want to able to define shell aliases with the same name of shell
# builtins.
#
# We also prefer shells that, when 'set -x' is in effect, do not also
# redirect traces upon stderr redirections.  For example,
#  $ set -x; echo x 2>file
# would emit "+ echo x" into file with older zsh versions.  Similarly,
#   $ set -x; P=1 true 2>file
# would emit "P=1" into file with /usr/xpg4/bin/sh from Solaris 10 and
# /bin/sh from SunOS 5.11 and OpenBSD 4.7.
#
# Use '$am_score' to indicate the degree of acceptability of the shell.
# A score of "10" means that the shell is good enough for our needs;
# a score of "9" means that the shell has some minor bugs or limitation,
# but is still (barely) acceptable for our uses.  Any other score means
# that the shell is broken or unfit.
#
AC_DEFUN([_AM_CHECK_CANDIDATE_SHELL],
  [am_score=10
  while :; do

    _AM_CHECK_SHELL_FEATURE([$1],
      [supports \$(cmd)],
      [test "$(echo x)" = x],
      [], [am_score=1; break])

    _AM_CHECK_SHELL_FEATURE([$1],
      [supports \$((expr))],
      [test $((1 + 2 * 3)) = 7],
      [], [am_score=1; break])

    _AM_CHECK_SHELL_FEATURE([$1],
      [supports \${@%:@var}],
      [zero='' one='x' twelve=' foobar baz!' \
        && test ${@%:@zero} -eq 0 \
        && test ${@%:@one} -eq 1 \
        && test ${@%:@twelve} -eq 12],
      [], [am_score=1; break])

    _AM_CHECK_SHELL_FEATURE([$1],
      [supports \${var@%:@glob} and \${var%glob}],
      [v=a/b/c \
        && test ${v@%:@*/} = b/c \
        && test ${v@%:@@%:@*/} = c \
        && test ${v%/*} = a/b \
        && test ${v%%/*} = a],
      [], [am_score=1; break])

    _AM_CHECK_SHELL_FEATURE([$1],
      [preserves exit traps with "set -e"],
      [set -e; trap 'exit $?' 0; (exit 77); exit 77],
      [], [am_score=1; break])

    _AM_CHECK_SHELL_FEATURE([$1],
      [can define exit traps in a shell function],
      [fail=0 && foo() { trap 'fail=1' 0; } && foo && test $fail = 0],
      [], [am_score=1; break])

    _AM_CHECK_SHELL_FEATURE([$1],
      [corrupts stderr with "set -x"],
      [(set -x; P=1 true 2>&3) 3>&1 2>/dev/null | grep P=1],
      [am_score=9], [])

    echo 'return 34' > conftest-return.sh
    echo 'ok=no' >> conftest-return.sh
    _AM_CHECK_SHELL_FEATURE([$1],
      [can return early from "dot-sourced" files],
      [ok=yes; . ./conftest-return.sh; test $? -eq 34 && test $ok = yes],
      [rm -f conftest-return.sh],
      [rm -f conftest-return.sh; am_score=1; break])

    echo 'alias false=echo' > conftest-alias.sh
    echo 'false && test "$(false 97)" = 97' >> conftest-alias.sh
    _AM_CHECK_SHELL_FEATURE([$1],
      [supports alias named like shell builtins],
      [. ./conftest-alias.sh],
      [rm -f conftest-alias.sh],
      [rm -f conftest-alias.sh; am_score=1; break])

    _AM_CHECK_SHELL_FEATURE([$1],
      [supports "test -e"],
      [test -e config.log && test -e . && test ! -e nonesuch],
      [], [am_score=1; break])

    break
  done])

# These messages only goes to the config.log file.
AC_MSG_NOTICE([will now look for a sturdy POSIX shell, for our testsuite])

AC_CACHE_VAL(
  [ac_cv_AM_TEST_RUNNER_SHELL],
  [if test "$AM_TEST_RUNNER_SHELL"; then
    # Let the user override it.
    ac_cv_AM_TEST_RUNNER_SHELL=$AM_TEST_RUNNER_SHELL
  else
    ac_cv_AM_TEST_RUNNER_SHELL=no
    am_candidate_shells=${CONFIG_SHELL-}
    # For the benefit of Solaris.
    am_PATH=$PATH$PATH_SEPARATOR/usr/xpg6/bin$PATH_SEPARATOR/usr/xpg4/bin
    for am_sh in sh sh5 dash ash bash zsh ksh pdksh; do
      AC_PATH_PROG([am_candidate_sh], [$am_sh], [], [$am_PATH])
      if test -n "$am_candidate_sh"; then
        am_candidate_shells="$am_candidate_shells $am_candidate_sh"
      fi
      AM_SUBST_NOTMAKE([am_candidate_sh])
      # Must nullify these in order not to interfere with the checks in
      # the next loop.
      AS_UNSET([am_candidate_sh])
      AS_UNSET([ac_cv_path_am_candidate_sh])
    done
    AS_UNSET([am_PATH]) # Not required anymore
    for am_sh in $am_candidate_shells; do
      am_score=0
      _AM_CHECK_CANDIDATE_SHELL([$am_sh])
      if test $am_score -eq 9; then
        # The shell is barely acceptable for our needs.  We might
        # still find one that is even better, so continue looking.
        AC_MSG_NOTICE([shell $am_sh is acceptable, but we might do better])
        ac_cv_AM_TEST_RUNNER_SHELL=$am_sh
      elif test $am_score -eq 10; then
        AC_MSG_NOTICE([shell $am_sh is good enough, stop looking])
        ac_cv_AM_TEST_RUNNER_SHELL=$am_sh
        break
      fi
    done
  fi
  AM_TEST_RUNNER_SHELL=$ac_cv_AM_TEST_RUNNER_SHELL])

if test $AM_TEST_RUNNER_SHELL = no; then
  AC_MSG_FAILURE([m4_normalize([no POSIX shell found that is good
                                enough to be used in our testsuite])])
else
  AC_MSG_NOTICE([will use $AM_TEST_RUNNER_SHELL as the testsuite shell])
fi

AC_ARG_VAR([AM_TEST_RUNNER_SHELL],
           [a sturdy POSIX shell for our testsuite])


###########################################################################

# Look for C, C++ and fortran compilers to be used in the testsuite.

dnl We don't want to abort our configuration script if no C compiler is
dnl available, as such a compiler is only required to run part of the
dnl testsuite, not to build or install Automake.  Ditto for C++, Fortran
dnl and Fortran 77 compilers.  Unfortunately, autoconf does not offer an
dnl easy way to obtain this behaviour, so we'll need a few hacks.

dnl We want the body of this macro to expand as a single shell statement,
dnl thus we wrap it into { ... } brackets.
AC_DEFUN([_AM_WRAP_MSG_ERROR], [ {
  AC_MSG_WARN([$1])
  am__failed=yes
  break
} ])

AC_DEFUN([_AM_COMPILER_CAN_FAIL], [
  m4_pushdef([AC_MSG_FAILURE], m4_defn([_AM_WRAP_MSG_ERROR]))
  m4_pushdef([AC_MSG_ERROR],   m4_defn([_AM_WRAP_MSG_ERROR]))
  am__failed=no
  while :; do
     $1
     break
  done
  AS_IF([test $am__failed = yes], [$2])
  # We have to clear these cache variables, so that future checks on
  # compilers for different languages won't be confused.
  unset ac_cv_objext ac_cv_exeext
  # We also need to meddle with the autoconf internals to ensure that
  # checks to find object and executable extensions will be run anew.
  # FIXME: In the long run, the better thing to do would be to fix
  # FIXME: autoconf instead ...
  m4_undefine([m4_provide(_AC_COMPILER_OBJEXT)])
  m4_undefine([m4_provide(_AC_COMPILER_EXEEXT)])
  m4_popdef([AC_MSG_FAILURE])
  m4_popdef([AC_MSG_ERROR])
])

AC_DEFUN([_AM_SKIP_COMP_TESTS],
  [AC_MSG_NOTICE([tests requiring the $1 compiler will be skipped])])

# Prefer generic compilers to GNU ones when possible.  This will ensure
# more testsuite coverage "in the wild".
# Note that we don't look for the MSVC C/C++ compiler here.  This is
# deliberate; for more discussion and rationale, see:
# <http://lists.gnu.org/archive/html/automake-patches/2012-01/msg00130.html>

AC_MSG_NOTICE([will now look for generic compilers])

# C compiler.
_AM_COMPILER_CAN_FAIL(dnl
  [AC_PROG_CC([cc gcc])],
  [CC=false; _AM_SKIP_COMP_TESTS([C])])

AS_IF([test x"$GCC" = x"yes"], [am_CC_is_GNU=yes], [am_CC_is_GNU=no])

# On case-insensitive file systems (seen e.g. on Cygwin and Mac OS X)
# we must avoid looking for 'CC', because that would be the same as
# 'cc', and could cause $CXX to point to the C compiler, instead of
# to a C++ compiler as expected (see automake bugs #11893 and #10766).
# Similarly, we must avoid looking for 'RCC', as that can point to the
# Qt4 "Resource Compiler": <http://doc.qt.digia.com/4.2/rcc.html>
if test -f /bIn/rMdIr || test -f /uSr/bIn/rMdIr; then
  # Case-insensitive file system, don't look for CC.
  am_CC= am_RCC=
else
  am_CC=CC am_RCC=RCC
fi

# The list of C++ compilers here has been copied, pasted and edited
# from 'lib/autoconf/c.m4:AC_PROG_CXX' in the Autoconf distribution.
# Keep it in sync, or better again, find out a way to avoid this code
# duplication.
_AM_COMPILER_CAN_FAIL([AC_PROG_CXX(dnl
  [aCC $am_CC FCC KCC $am_RCC xlC_r xlC c++ cxx cc++ gpp g++])],
  [CXX=false; _AM_SKIP_COMP_TESTS([C++])])

AS_IF([test x"$GXX" = x"yes"], [am_CXX_is_GNU=yes], [am_CXX_is_GNU=no])

# The lists of Fortran compilers here has been copied, pasted and edited
# from file 'lib/autoconf/fortran.m4' in the Autoconf distribution.
# Keep it in sync, or better again, find out a way to avoid this code
# duplication.

_AM_COMPILER_CAN_FAIL([AC_PROG_FC(dnl
  [xlf95 f95 fort ifort ifc efc pgfortran pgf95 lf95 ftn nagfor] dnl
  [xlf90 f90 pgf90 pghpf epcf90 g95 gfortran])],
  [FC=false; _AM_SKIP_COMP_TESTS([Fortran])])

AS_IF([test x"$GFC" = x"yes"], [am_FC_is_GNU=yes], [am_FC_is_GNU=no])

_AM_COMPILER_CAN_FAIL([AC_PROG_F77(dnl
  [xlf f77 frt pgf77 cf77 fort77 fl32 af77 g77 gfortran])],
  [F77=false; _AM_SKIP_COMP_TESTS([Fortran 77])])

AS_IF([test x"$G77" = x"yes"], [am_F77_is_GNU=yes], [am_F77_is_GNU=no])

# Some tests will need the GNU compilers.  Searching for them here would
# be overkill, since our testsuite already handles their search and setup
# pretty well.  But in case the compilers already found are the GNU ones,
# we want to use them in the testsuite where GNU compilers are required.
# Also, in case the compilers detected above (at configure time) are not
# the GNU ones, we cannot use the values of CFLAGS, CXXFLAGS, FCFLAGS and
# FFLAGS detected for them with the GNU compilers too, since it's likely
# they won't be compatible.  So we allow the user to define variants of
# these variables for the GNU compilers separately.

AC_MSG_NOTICE([will now look for GNU compilers])

# GNU C compiler.
AC_ARG_VAR([GNU_CC],     [GNU C compiler])
AC_ARG_VAR([GNU_CFLAGS], [GNU C compiler flags])
if test $am_CC_is_GNU = yes; then
  AC_MSG_NOTICE([$CC is already a GNU C compiler])
  GNU_CC=$CC GNU_CFLAGS=${GNU_CFLAGS-$CFLAGS}
else
  AC_CHECK_TOOLS([GNU_CC], [gcc], [false])
fi
if test "$GNU_CC" != false; then
  AS_IF([AM_RUN_LOG([$GNU_CC --version && $GNU_CC -v])], [],
        [AC_MSG_WARN([botched installation for GNU C compiler])
         _AM_SKIP_COMP_TESTS([GNU C])])
fi

# GNU C++ compiler.
AC_ARG_VAR([GNU_CXX],      [GNU C++ compiler])
AC_ARG_VAR([GNU_CXXFLAGS], [GNU C++ compiler flags])
if test $am_CXX_is_GNU = yes; then
  AC_MSG_NOTICE([$CXX is already a GNU C++ compiler])
  GNU_CXX=$CXX
  GNU_CXXFLAGS=${GNU_CXXFLAGS-$CXXFLAGS}
else
  AC_CHECK_TOOLS([GNU_CXX], [g++ gpp], [false])
fi
if test "$GNU_CXX" != false; then
  AS_IF([AM_RUN_LOG([$GNU_CXX --version && $GNU_CXX -v])], [],
        [AC_MSG_WARN([botched installation for GNU C++ compiler])
         _AM_SKIP_COMP_TESTS([GNU C++])])
fi

# GNU Fortran compiler.
AC_ARG_VAR([GNU_FC],      [GNU Fortran compiler])
AC_ARG_VAR([GNU_FCFLAGS], [GNU Fortran compiler flags])
if test $am_FC_is_GNU = yes; then
  AC_MSG_NOTICE([$FC is already a GNU Fortran compiler])
  GNU_FC=$FC
  GNU_FCFLAGS=${GNU_FCFLAGS-$FCFLAGS}
else
  AC_CHECK_TOOLS([GNU_FC], [gfortran], [false])
fi
if test "$GNU_FC" != false; then
  AS_IF([AM_RUN_LOG([$GNU_FC --version && $GNU_FC -v])], [],
        [AC_MSG_WARN([botched installation for GNU Fortran compiler])
         _AM_SKIP_COMP_TESTS([GNU Fortran])])
fi

# GNU Fortran 77 compiler.
AC_ARG_VAR([GNU_F77],    [GNU Fortran 77 compiler])
AC_ARG_VAR([GNU_FFLAGS], [GNU Fortran 77 compiler flags])
if test $am_F77_is_GNU = yes; then
  AC_MSG_NOTICE([$F77 is already a GNU Fortran 77 compiler])
  GNU_F77=$F77
  GNU_FFLAGS=${GNU_FFLAGS-$FFLAGS}
else
  AC_CHECK_TOOLS([GNU_F77], [g77 gfortran], [false])
fi
if test "$GNU_F77" != false; then
  AS_IF([AM_RUN_LOG([$GNU_F77 --version && $GNU_F77 -v])], [],
        [AC_MSG_WARN([botched installation for GNU Fortran 77 compiler])
        _AM_SKIP_COMP_TESTS([GNU Fortran 77])])
fi

# GNU Java compiler.
AC_ARG_VAR([GNU_GCJ], [GNU Java compiler])
AC_ARG_VAR([GNU_GCJFLAGS], [GNU Java compiler flags])
AC_CHECK_TOOLS([GNU_GCJ], [gcj], [false])
if test "$GNU_GCJ" != false; then
  AS_IF([AM_RUN_LOG([$GNU_GCJ --version && $GNU_GCJ -v])], [],
        [AC_MSG_WARN([botched installation for GNU Java compiler])
        _AM_SKIP_COMP_TESTS([GNU Java])])
fi

# If we have been able to find at least a working compiler above, we
# know what the object and executable extensions for this platform are.
OBJEXT=${ac_cv_objext-UNKNOWN}
EXEEXT=${ac_cv_exeext-UNKNOWN}
AC_SUBST([OBJEXT])
AC_SUBST([EXEEXT])

###########################################################################

## ---------------------- ##
##  Create output files.  ##
## ---------------------- ##

AC_CONFIG_FILES([Makefile])
AC_CONFIG_LINKS([GNUmakefile:GNUmakefile])

AC_CONFIG_FILES([t/wrap/aclocal-${APIVERSION}:t/wrap/aclocal.in],
                [chmod +x t/wrap/aclocal-${APIVERSION}],
                [APIVERSION=$APIVERSION])
AC_CONFIG_FILES([t/wrap/automake-${APIVERSION}:t/wrap/automake.in],
                [chmod +x t/wrap/automake-${APIVERSION}],
                [APIVERSION=$APIVERSION])

AC_OUTPUT

# Inform the user if this version of automake is a beta release or
# a development snapshot.
# According to HACKING, the version of a development snapshot should
# end with an "odd" letter (a, c, ...), the version of a test release
# should end wit an "even" letter (b, d, ...).

am_stable_version_rx='[[1-9]\.[0-9]+(\.[0-9]+)?]'
am_beta_version_rx="[$am_stable_version_rx[bdfhjlnprtvxz]]"

am_release_type=`AS_ECHO(["$PACKAGE_VERSION"]) | LC_ALL=C awk ["
  /^$am_stable_version_rx$/ { print \"stable\"; exit(0); }
  /^$am_beta_version_rx$/ { print \"beta version\"; exit(0); }
  { print \"development snapshot\"; }"]`

# '$silent' is set to yes if configure is passed the '--quiet' option.
test "$am_release_type" = stable || test "$silent" = yes || cat <<EOF

WARNING: You are about to use a $am_release_type of automake.
WARNING: It might easily suffer from new bugs or regressions.
WARNING: You are strongly advised not to use it in production code.

Please report bugs, problems and feedback to <AC_PACKAGE_BUGREPORT>.
EOF

AS_EXIT([0])