libgcobol/configure.ac - rust-lang/gcc - Git at Google

 # Configure script for libgcobol.
 # Adapted by James K. Lowden from configure script for libalg68.

 # This file is part of GCC.

 # GCC 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 3, or (at your option)
 # any later version.

 # GCC 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 GCC; see the file COPYING3.  If not see
 # <http://www.gnu.org/licenses/>.

 # Configure looks for the existence of this file to auto-config each language.
 # We define several parameters used by configure:

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

 AC_INIT(package-unused, version-unused,,libgcobol)
 AC_CONFIG_SRCDIR(Makefile.am)
 AC_CONFIG_HEADER(config.h)

 # Do not delete or change the following two lines.  For why, see
 # http://gcc.gnu.org/ml/libstdc++/2003-07/msg00451.html
 AC_CANONICAL_SYSTEM
 ACX_NONCANONICAL_TARGET

 AM_ENABLE_MULTILIB(, ..)

 target_alias=${target_alias-$host_alias}
 AC_SUBST(target_alias)

 AM_MAINTAINER_MODE

 AM_INIT_AUTOMAKE([1.15.1 no-define foreign no-dist -Wall -Wno-portability])

 AC_MSG_CHECKING([for --enable-libgcobol])
 AC_ARG_ENABLE(libgcobol,
   [AS_HELP_STRING([--enable-libgcobol], [Enable libgcobol])])
 AC_MSG_RESULT($enable_libgcobol)

 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
 AC_ARG_ENABLE(version-specific-runtime-libs,
 AS_HELP_STRING([--enable-version-specific-runtime-libs],
 [Specify that runtime libraries should be installed in a compiler-specific directory]),
 [case "$enableval" in
  yes) version_specific_libs=yes ;;
  no)  version_specific_libs=no ;;
  *)   AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
  esac],
 [version_specific_libs=no])
 AC_MSG_RESULT($version_specific_libs)

 # This works around the fact that libtool configuration may change LD
 # for this particular configuration, but some shells, instead of
 # keeping the changes in LD private, export them just because LD is
 # exported.
 ORIGINAL_LD_FOR_MULTILIBS=$LD

 GCC_NO_EXECUTABLES

 AC_USE_SYSTEM_EXTENSIONS

 # Find other programs we need.
 AC_CHECK_TOOL(AR, ar)
 AC_CHECK_TOOL(NM, nm)
 AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error)
 AC_PROG_MAKE_SET
 AC_PROG_INSTALL

 AM_PROG_LIBTOOL
 LT_INIT

 AC_LIBTOOL_DLOPEN
 LT_LIB_M

 AM_CONDITIONAL([ENABLE_DARWIN_AT_RPATH], [test x$enable_darwin_at_rpath = xyes])

 AC_SUBST(enable_shared)
 AC_SUBST(enable_static)

 # This library is written in C++ and needs to link with the C++ runtime.
 AC_LANG([C++])

 # We must force CC/CXX to /not/ be precious variables; otherwise
 # the wrong, non-multilib-adjusted value will be used in multilibs.
 # As a side effect, we have to subst CFLAGS ourselves.

 m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
 m4_define([_AC_ARG_VAR_PRECIOUS],[])
 AC_PROG_CXX
 m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])

 AC_SUBST(CXXFLAGS)

 GCC_WITH_TOOLEXECLIBDIR

 # Calculate toolexeclibdir
 # Also toolexecdir, though it's only used in toolexeclibdir
 case ${version_specific_libs} in
   yes)
     # Need the gcc compiler version to know where to install libraries
     # and header files if --enable-version-specific-runtime-libs option
     # is selected.
     toolexecdir='$(libdir)/gcc/$(target_noncanonical)'
     toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)'
     ;;
   no)
     if test -n "$with_cross_host" &&
        test x"$with_cross_host" != x"no"; then
       # Install a library built with a cross compiler in tooldir, not libdir.
       toolexecdir='$(exec_prefix)/$(target_noncanonical)'
       toolexeclibdir='$(toolexecdir)/lib'
     else
       toolexecdir='$(libdir)/gcc-lib/$(target_noncanonical)'
       toolexeclibdir='$(libdir)'
     fi
     multi_os_directory=`$CC -print-multi-os-directory`
     case $multi_os_directory in
       .) ;; # Avoid trailing /.
       *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
     esac
     ;;
 esac
 AC_SUBST(toolexecdir)
 AC_SUBST(toolexeclibdir)

 # For iconv support.
 AM_ICONV

 # Checks for header files.
 AC_CHECK_HEADERS(malloc.h)

 AC_CHECK_SIZEOF([void *])

 # Get target configury.
 unset LIBGCOBOL_SUPPORTED
 . ${srcdir}/configure.tgt

 # Decide if it's usable.
 case $LIBGCOBOL_SUPPORTED:$enable_libgcobol in
 *:no)  use_libgcobol=no  ;;
 *:yes) use_libgcobol=yes ;;
 yes:*) use_libgcobol=yes ;;
 *:*)   use_libgcobol=no  ;;
 esac

 # -----------------
 # __int128 support
 # -----------------

 AC_CACHE_CHECK([whether __int128 is supported], [libgcobol_cv_have_int128],
   [GCC_TRY_COMPILE_OR_LINK([
     __int128 foo (__int128 )
     {
     __int128 aaa;
      return (__int128) aaa;
     }

     __int128 bar (__int128 )
     {
     __int128 aaa;
      return (__int128) aaa;
     }
   ],[
     foo (1);
     bar (1);
   ],[
     libgcobol_cv_have_int128=yes
   ],[
     libgcobol_cv_have_int128=no
 ])])

 AM_CONDITIONAL(BUILD_LIBGCOBOL, [test "x$use_libgcobol" = xyes && test "x$libgcobol_cv_have_int128" = xyes])

 # Check if functions are available in libc before adding extra libs.
 AC_SEARCH_LIBS([malloc], [c])
 AC_SEARCH_LIBS([clock_gettime], [c rt])

 # libgcobol soname version
 LIBGCOBOL_VERSION=1:0:0
 AC_SUBST(LIBGCOBOL_VERSION)

 ## added, currently unused.
 # VERSION_SUFFIX=$(echo $LIBGCOBOL_VERSION | tr  ':' '.' )
 # AC_SUBST(VERSION_SUFFIX)
 ## end added

 extra_ldflags_libgcobol=
 case $host in
   *-*-darwin*)
     extra_ldflags_libgcobol=-Wl,-U,___cobol_main ;;
   *) ;;
 esac
 AC_SUBST(extra_ldflags_libgcobol)

 AC_CHECK_HEADERS_ONCE(floatingpoint.h ieeefp.h fenv.h fptrap.h \
 complex.h stdlib.h errno.h)

 # Look for a way to represent the program name
 # First, check the GLIBC case
 AC_CHECK_DECLS([program_invocation_short_name], , ,[
 #if HAVE_ERRNO_H
 # define _GNU_SOURCE
 # include <errno.h>
 #endif
 ])

 # Check an alternate
 AC_CHECK_FUNCS_ONCE(getprogname)

 # These are GLIBC
 AC_CHECK_FUNCS_ONCE(random_r srandom_r initstate_r setstate_r)

 # Some functions we check to figure out if the libc Float128 support
 # is adequate.

 # These are C23.
 AC_CHECK_FUNCS_ONCE(strfromf32 strfromf64)

 # These are GLIBC.
 AC_CHECK_FUNCS_ONCE(strtof128 strfromf128)
 # We need to make sure to check libc before adding libm.
 libgcobol_have_sinf128=no
 AC_SEARCH_LIBS([sinf128], [c m], libgcobol_have_sinf128=yes)
 libgcobol_have_cacosf128=no
 AC_SEARCH_LIBS([cacosf128], [c m], libgcobol_have_cacosf128=yes)

 # Copied from gcc/configure.ac. 2025-06-05 R.J.Dubner
 # At least for glibc, clock_gettime is in librt.  But don't pull that
 # in if it still doesn't give us the function we want.
 ac_cv_func_clock_gettime=no
 if test $ac_cv_func_clock_gettime = no; then
   AC_CHECK_LIB(rt, clock_gettime,
     [LIBS="-lrt $LIBS"
      AC_DEFINE(HAVE_CLOCK_GETTIME, 1,
 	       [Define to 1 if you have the `clock_gettime' function.])])
 fi

 have_iec_60559_libc_support=no
 if test "x$ac_cv_func_strtof128$ac_cv_func_strfromf128" = xyesyes \
    && test "x$libgcobol_have_sinf128$libgcobol_have_cacosf128" = xyesyes; then
   have_iec_60559_libc_support=yes
 fi

 # Check whether libquadmath should be used
 AC_ARG_ENABLE(libquadmath,
 AS_HELP_STRING([--disable-libquadmath],
   [disable libquadmath support for libgcobol]),
 ENABLE_LIBQUADMATH_SUPPORT=$enableval,
 if test "x$have_iec_60559_libc_support" = xyes; then
   ENABLE_LIBQUADMATH_SUPPORT=default
 else
   ENABLE_LIBQUADMATH_SUPPORT=yes
 fi)
 enable_libquadmath_support=
 if test "${ENABLE_LIBQUADMATH_SUPPORT}" = "no" ; then
   enable_libquadmath_support=no
 elif test "${ENABLE_LIBQUADMATH_SUPPORT}" = "default" ; then
   enable_libquadmath_support=default
 fi
 LIBGCOBOL_CHECK_FLOAT128

 # struct tm tm_zone is a POSIX.1-2024 addition.
 AC_CHECK_MEMBERS([struct tm.tm_zone],,,[#include <time.h>])

 if test "${multilib}" = "yes"; then
   multilib_arg="--enable-multilib"
 else
   multilib_arg=
 fi

 # Determine what GCC version number to use in filesystem paths.
 GCC_BASE_VER

 # Add dependencies for libgcobol.spec file, this might be excessive - since
 # the spec file might not use all of them.
 SPEC_LIBGCOBOL_DEPS="$LIBS"
 AC_SUBST(SPEC_LIBGCOBOL_DEPS)

 AC_CONFIG_FILES([
 Makefile
 libgcobol.spec
 ])

 AC_MSG_NOTICE([libgcobol has been configured.])

 AC_OUTPUT
	# Configure script for libgcobol.
	# Adapted by James K. Lowden from configure script for libalg68.

	# This file is part of GCC.

	# GCC 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 3, or (at your option)
	# any later version.

	# GCC 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 GCC; see the file COPYING3. If not see
	# <http://www.gnu.org/licenses/>.

	# Configure looks for the existence of this file to auto-config each language.
	# We define several parameters used by configure:

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

	AC_INIT(package-unused, version-unused,,libgcobol)
	AC_CONFIG_SRCDIR(Makefile.am)
	AC_CONFIG_HEADER(config.h)

	# Do not delete or change the following two lines. For why, see
	# http://gcc.gnu.org/ml/libstdc++/2003-07/msg00451.html
	AC_CANONICAL_SYSTEM
	ACX_NONCANONICAL_TARGET

	AM_ENABLE_MULTILIB(, ..)

	target_alias=${target_alias-$host_alias}
	AC_SUBST(target_alias)

	AM_MAINTAINER_MODE

	AM_INIT_AUTOMAKE([1.15.1 no-define foreign no-dist -Wall -Wno-portability])

	AC_MSG_CHECKING([for --enable-libgcobol])
	AC_ARG_ENABLE(libgcobol,
	[AS_HELP_STRING([--enable-libgcobol], [Enable libgcobol])])
	AC_MSG_RESULT($enable_libgcobol)

	AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
	AC_ARG_ENABLE(version-specific-runtime-libs,
	AS_HELP_STRING([--enable-version-specific-runtime-libs],
	[Specify that runtime libraries should be installed in a compiler-specific directory]),
	[case "$enableval" in
	yes) version_specific_libs=yes ;;
	no) version_specific_libs=no ;;
	*) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
	esac],
	[version_specific_libs=no])
	AC_MSG_RESULT($version_specific_libs)

	# This works around the fact that libtool configuration may change LD
	# for this particular configuration, but some shells, instead of
	# keeping the changes in LD private, export them just because LD is
	# exported.
	ORIGINAL_LD_FOR_MULTILIBS=$LD

	GCC_NO_EXECUTABLES

	AC_USE_SYSTEM_EXTENSIONS

	# Find other programs we need.
	AC_CHECK_TOOL(AR, ar)
	AC_CHECK_TOOL(NM, nm)
	AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error)
	AC_PROG_MAKE_SET
	AC_PROG_INSTALL

	AM_PROG_LIBTOOL
	LT_INIT

	AC_LIBTOOL_DLOPEN
	LT_LIB_M

	AM_CONDITIONAL([ENABLE_DARWIN_AT_RPATH], [test x$enable_darwin_at_rpath = xyes])

	AC_SUBST(enable_shared)
	AC_SUBST(enable_static)

	# This library is written in C++ and needs to link with the C++ runtime.
	AC_LANG([C++])

	# We must force CC/CXX to /not/ be precious variables; otherwise
	# the wrong, non-multilib-adjusted value will be used in multilibs.
	# As a side effect, we have to subst CFLAGS ourselves.

	m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
	m4_define([_AC_ARG_VAR_PRECIOUS],[])
	AC_PROG_CXX
	m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])

	AC_SUBST(CXXFLAGS)

	GCC_WITH_TOOLEXECLIBDIR

	# Calculate toolexeclibdir
	# Also toolexecdir, though it's only used in toolexeclibdir
	case ${version_specific_libs} in
	yes)
	# Need the gcc compiler version to know where to install libraries
	# and header files if --enable-version-specific-runtime-libs option
	# is selected.
	toolexecdir='$(libdir)/gcc/$(target_noncanonical)'
	toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)'
	;;
	no)
	if test -n "$with_cross_host" &&
	test x"$with_cross_host" != x"no"; then
	# Install a library built with a cross compiler in tooldir, not libdir.
	toolexecdir='$(exec_prefix)/$(target_noncanonical)'
	toolexeclibdir='$(toolexecdir)/lib'
	else
	toolexecdir='$(libdir)/gcc-lib/$(target_noncanonical)'
	toolexeclibdir='$(libdir)'
	fi
	multi_os_directory=`$CC -print-multi-os-directory`
	case $multi_os_directory in
	.) ;; # Avoid trailing /.
	*) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
	esac
	;;
	esac
	AC_SUBST(toolexecdir)
	AC_SUBST(toolexeclibdir)

	# For iconv support.
	AM_ICONV

	# Checks for header files.
	AC_CHECK_HEADERS(malloc.h)

	AC_CHECK_SIZEOF([void *])

	# Get target configury.
	unset LIBGCOBOL_SUPPORTED
	. ${srcdir}/configure.tgt

	# Decide if it's usable.
	case $LIBGCOBOL_SUPPORTED:$enable_libgcobol in
	*:no) use_libgcobol=no ;;
	*:yes) use_libgcobol=yes ;;
	yes:*) use_libgcobol=yes ;;
	:) use_libgcobol=no ;;
	esac

	# -----------------
	# __int128 support
	# -----------------

	AC_CACHE_CHECK([whether __int128 is supported], [libgcobol_cv_have_int128],
	[GCC_TRY_COMPILE_OR_LINK([
	__int128 foo (__int128 )
	{
	__int128 aaa;
	return (__int128) aaa;
	}

	__int128 bar (__int128 )
	{
	__int128 aaa;
	return (__int128) aaa;
	}
	],[
	foo (1);
	bar (1);
	],[
	libgcobol_cv_have_int128=yes
	],[
	libgcobol_cv_have_int128=no
	])])

	AM_CONDITIONAL(BUILD_LIBGCOBOL, [test "x$use_libgcobol" = xyes && test "x$libgcobol_cv_have_int128" = xyes])

	# Check if functions are available in libc before adding extra libs.
	AC_SEARCH_LIBS([malloc], [c])
	AC_SEARCH_LIBS([clock_gettime], [c rt])

	# libgcobol soname version
	LIBGCOBOL_VERSION=1:0:0
	AC_SUBST(LIBGCOBOL_VERSION)

	## added, currently unused.
	# VERSION_SUFFIX=$(echo $LIBGCOBOL_VERSION \| tr ':' '.' )
	# AC_SUBST(VERSION_SUFFIX)
	## end added

	extra_ldflags_libgcobol=
	case $host in
	--darwin*)
	extra_ldflags_libgcobol=-Wl,-U,___cobol_main ;;
	*) ;;
	esac
	AC_SUBST(extra_ldflags_libgcobol)

	AC_CHECK_HEADERS_ONCE(floatingpoint.h ieeefp.h fenv.h fptrap.h \
	complex.h stdlib.h errno.h)

	# Look for a way to represent the program name
	# First, check the GLIBC case
	AC_CHECK_DECLS([program_invocation_short_name], , ,[
	#if HAVE_ERRNO_H
	# define _GNU_SOURCE
	# include <errno.h>
	#endif
	])

	# Check an alternate
	AC_CHECK_FUNCS_ONCE(getprogname)

	# These are GLIBC
	AC_CHECK_FUNCS_ONCE(random_r srandom_r initstate_r setstate_r)

	# Some functions we check to figure out if the libc Float128 support
	# is adequate.

	# These are C23.
	AC_CHECK_FUNCS_ONCE(strfromf32 strfromf64)

	# These are GLIBC.
	AC_CHECK_FUNCS_ONCE(strtof128 strfromf128)
	# We need to make sure to check libc before adding libm.
	libgcobol_have_sinf128=no
	AC_SEARCH_LIBS([sinf128], [c m], libgcobol_have_sinf128=yes)
	libgcobol_have_cacosf128=no
	AC_SEARCH_LIBS([cacosf128], [c m], libgcobol_have_cacosf128=yes)

	# Copied from gcc/configure.ac. 2025-06-05 R.J.Dubner
	# At least for glibc, clock_gettime is in librt. But don't pull that
	# in if it still doesn't give us the function we want.
	ac_cv_func_clock_gettime=no
	if test $ac_cv_func_clock_gettime = no; then
	AC_CHECK_LIB(rt, clock_gettime,
	[LIBS="-lrt $LIBS"
	AC_DEFINE(HAVE_CLOCK_GETTIME, 1,
	[Define to 1 if you have the `clock_gettime' function.])])
	fi

	have_iec_60559_libc_support=no
	if test "x$ac_cv_func_strtof128$ac_cv_func_strfromf128" = xyesyes \
	&& test "x$libgcobol_have_sinf128$libgcobol_have_cacosf128" = xyesyes; then
	have_iec_60559_libc_support=yes
	fi

	# Check whether libquadmath should be used
	AC_ARG_ENABLE(libquadmath,
	AS_HELP_STRING([--disable-libquadmath],
	[disable libquadmath support for libgcobol]),
	ENABLE_LIBQUADMATH_SUPPORT=$enableval,
	if test "x$have_iec_60559_libc_support" = xyes; then
	ENABLE_LIBQUADMATH_SUPPORT=default
	else
	ENABLE_LIBQUADMATH_SUPPORT=yes
	fi)
	enable_libquadmath_support=
	if test "${ENABLE_LIBQUADMATH_SUPPORT}" = "no" ; then
	enable_libquadmath_support=no
	elif test "${ENABLE_LIBQUADMATH_SUPPORT}" = "default" ; then
	enable_libquadmath_support=default
	fi
	LIBGCOBOL_CHECK_FLOAT128

	# struct tm tm_zone is a POSIX.1-2024 addition.
	AC_CHECK_MEMBERS([struct tm.tm_zone],,,[#include <time.h>])

	if test "${multilib}" = "yes"; then
	multilib_arg="--enable-multilib"
	else
	multilib_arg=
	fi

	# Determine what GCC version number to use in filesystem paths.
	GCC_BASE_VER

	# Add dependencies for libgcobol.spec file, this might be excessive - since
	# the spec file might not use all of them.
	SPEC_LIBGCOBOL_DEPS="$LIBS"
	AC_SUBST(SPEC_LIBGCOBOL_DEPS)

	AC_CONFIG_FILES([
	Makefile
	libgcobol.spec
	])

	AC_MSG_NOTICE([libgcobol has been configured.])

	AC_OUTPUT