configure.ac - libtool - Git at Google

 # Process this file with autoconf to create configure. -*- autoconf -*-

 #   Copyright (C) 2001, 2004-2005, 2008, 2010-2019, 2021-2025 Free
 #   Software Foundation, Inc.
 #   Written by Gary V. Vaughan, 2001
 #
 #   This file is part of GNU Libtool.
 #
 # GNU Libtool 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 of
 # the License, or (at your option) any later version.
 #
 # GNU Libtool 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 GNU Libtool.  If not, see <https://www.gnu.org/licenses/>.
 ####


 AC_PREREQ(2.64)
 dnl Oldest automake required for bootstrap is below in AM_INIT_AUTOMAKE.


 ## ------------------------ ##
 ## Autoconf initialisation. ##
 ## ------------------------ ##
 AC_INIT([GNU Libtool],
 	m4_esyscmd([build-aux/git-version-gen .tarball-version]),
 	[bug-libtool@gnu.org])
 m4_ifndef([AC_PACKAGE_URL],
 	  [AC_SUBST([PACKAGE_URL], [https://www.gnu.org/s/libtool/])])

 # Remove this when a released Autoconf is capable of bootstrapping
 # Libtool without it (probably after autoconf-2.70).
 m4_ifndef([AC_CONFIG_MACRO_DIRS],
 	  [m4_define([AC_CONFIG_MACRO_DIRS], m4_defn([AC_CONFIG_MACRO_DIR]))])

 # Since we already declare these directories in this file, save those
 # choices, and push the results into Makefile.am to avoid declaring
 # them in two places making renames error prone, and where copies
 # might get out of sync.
 m4_define([AC_CONFIG_AUX_DIR],
      m4_defn([AC_CONFIG_AUX_DIR])[AC_SUBST([aux_dir], [$1])])
 m4_define([LT_CONFIG_LTDL_DIR],
      m4_defn([LT_CONFIG_LTDL_DIR])[AC_SUBST([ltdl_dir], [$1])])
 m4_define([AC_CONFIG_MACRO_DIRS],
      m4_defn([AC_CONFIG_MACRO_DIRS])[AC_SUBST([macro_dir], [$1])])

 AC_CONFIG_HEADERS([config.h:config-h.in])
 AC_CONFIG_SRCDIR([libtoolize.in])
 LT_CONFIG_LTDL_DIR([libltdl], [nonrecursive])
 AC_CONFIG_AUX_DIR([build-aux])
 AC_CONFIG_MACRO_DIRS([m4])
 AC_CONFIG_LIBOBJ_DIR([libltdl])

 package_revision=`$SHELL $ac_aux_dir/git-version-gen .tarball-version`
 AC_SUBST([package_revision])

 ## ------------------------ ##
 ## Autotest initialisation. ##
 ## ------------------------ ##

 AC_CONFIG_TESTDIR([tests])
 AC_SUBST([AUTOM4TE], [${AUTOM4TE=autom4te}])
 AC_SUBST([AUTOTEST], ['$(AUTOM4TE) --language=autotest'])


 ## ---------------------------------------- ##
 ## Display a configure time version banner. ##
 ## ---------------------------------------- ##

 # This is a sanity check so we can see what version is used in bug reports.
 AS_BOX([Configuring AC_PACKAGE_TARNAME AC_PACKAGE_VERSION])
 echo


 ## ------------ ##
 ## Shell tools. ##
 ## ------------ ##

 AC_PROG_GNU_M4


 ## ------------------------ ##
 ## Automake Initialisation. ##
 ## ------------------------ ##

 dnl These are bootstrap requirements! Once built, libtool may work with
 dnl much older releases of autoconf and automake.  See release notes.
 dnl 1.11 is needed for color-tests, 1.11.1 fixes a security issue.
 AM_INIT_AUTOMAKE([1.11.1 gnu subdir-objects dist-xz])
 AM_SILENT_RULES([yes])


 ## ------------------------- ##
 ## Autobuild initialisation. ##
 ## ------------------------- ##

 # You can set autobuild_mode at configure time to specify a "unique"
 # string for this build.
 : ${autobuild_mode=default}
 AB_VERSION='AC_PACKAGE_VERSION'
 AB_INIT([$autobuild_mode])


 dnl Make sure config.status is regenerated when the version timestamp changes
 AC_SUBST([CONFIG_STATUS_DEPENDENCIES], ['$(dotversion)'])


 ## ------------------------------- ##
 ## Libtool specific configuration. ##
 ## ------------------------------- ##

 AC_SUBST([aclocaldir], ["\$(datadir)/aclocal"])
 AC_SUBST([pkgdatadir], ["\$(datadir)/$PACKAGE"])

 AC_ARG_ENABLE(ltdl-install,
     [AS_HELP_STRING([--disable-ltdl-install], [do not install libltdl])])
 if test set != "${enable_ltdl_install+set}"; then
   enable_ltdl_install=yes
 fi

 # The list of scripts required to build libltdl, and which need to be
 # installed by libtoolize --ltdl, and consequently need to be placed in
 # $pkgdatadir by our make install rule.
 pkgaux_scripts="compile config.guess config.sub depcomp install-sh missing"
 AC_SUBST([pkgaux_scripts])


 ## ---------------- ##
 ## compiler checks. ##
 ## ---------------- ##

 # Need to be sure that we have a working C compiler, otherwise even with
 # a good C compiler: if the following C++ tests fail, the whole libtool
 # build fails!
 AC_PROG_CC
 GL_EARLY
 AM_PROG_CC_C_O
 AC_PROG_CPP

 ## ----------------------- ##
 ## Libtool initialisation. ##
 ## ----------------------- ##
 LT_INIT([dlopen win32-dll])
 _LT_SET_OPTION([LTDL_INIT], [nonrecursive])
 _LTDL_SETUP

 # Enable all the language support we can
 LT_LANG(C++)
 LT_LANG(Objective-C)
 LT_LANG(Objective-C++)
 LT_LANG(Fortran 77)
 LT_LANG(Fortran)
 LT_LANG(Go)
 LT_LANG(Java)
 LT_LANG(Windows Resource)

 # Ensure the correct file name (and path) conversion function
 # is available to the test suite.
 AC_SUBST([to_host_file_cmd])dnl
 AC_SUBST([to_tool_file_cmd])dnl

 # Propagate --enable-aix-soname option to the testsuite.
 AC_SUBST([with_aix_soname])dnl

 ## ---------------------- ##
 ## Gnulib initialisation. ##
 ## ---------------------- ##
 GL_INIT

 ## ------------- ##
 ## Documentation ##
 ## ------------- ##
 AM_MISSING_PROG([HELP2MAN], [help2man])

 ## -------- ##
 ## Outputs. ##
 ## -------- ##
 AC_CONFIG_FILES([Makefile gnulib-tests/Makefile])
 AC_OUTPUT
	# Process this file with autoconf to create configure. -- autoconf --

	# Copyright (C) 2001, 2004-2005, 2008, 2010-2019, 2021-2025 Free
	# Software Foundation, Inc.
	# Written by Gary V. Vaughan, 2001
	#
	# This file is part of GNU Libtool.
	#
	# GNU Libtool 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 of
	# the License, or (at your option) any later version.
	#
	# GNU Libtool 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 GNU Libtool. If not, see <https://www.gnu.org/licenses/>.
	####


	AC_PREREQ(2.64)
	dnl Oldest automake required for bootstrap is below in AM_INIT_AUTOMAKE.


	## ------------------------ ##
	## Autoconf initialisation. ##
	## ------------------------ ##
	AC_INIT([GNU Libtool],
	m4_esyscmd([build-aux/git-version-gen .tarball-version]),
	[bug-libtool@gnu.org])
	m4_ifndef([AC_PACKAGE_URL],
	[AC_SUBST([PACKAGE_URL], [https://www.gnu.org/s/libtool/])])

	# Remove this when a released Autoconf is capable of bootstrapping
	# Libtool without it (probably after autoconf-2.70).
	m4_ifndef([AC_CONFIG_MACRO_DIRS],
	[m4_define([AC_CONFIG_MACRO_DIRS], m4_defn([AC_CONFIG_MACRO_DIR]))])

	# Since we already declare these directories in this file, save those
	# choices, and push the results into Makefile.am to avoid declaring
	# them in two places making renames error prone, and where copies
	# might get out of sync.
	m4_define([AC_CONFIG_AUX_DIR],
	m4_defn([AC_CONFIG_AUX_DIR])[AC_SUBST([aux_dir], [$1])])
	m4_define([LT_CONFIG_LTDL_DIR],
	m4_defn([LT_CONFIG_LTDL_DIR])[AC_SUBST([ltdl_dir], [$1])])
	m4_define([AC_CONFIG_MACRO_DIRS],
	m4_defn([AC_CONFIG_MACRO_DIRS])[AC_SUBST([macro_dir], [$1])])

	AC_CONFIG_HEADERS([config.h:config-h.in])
	AC_CONFIG_SRCDIR([libtoolize.in])
	LT_CONFIG_LTDL_DIR([libltdl], [nonrecursive])
	AC_CONFIG_AUX_DIR([build-aux])
	AC_CONFIG_MACRO_DIRS([m4])
	AC_CONFIG_LIBOBJ_DIR([libltdl])

	package_revision=`$SHELL $ac_aux_dir/git-version-gen .tarball-version`
	AC_SUBST([package_revision])

	## ------------------------ ##
	## Autotest initialisation. ##
	## ------------------------ ##

	AC_CONFIG_TESTDIR([tests])
	AC_SUBST([AUTOM4TE], [${AUTOM4TE=autom4te}])
	AC_SUBST([AUTOTEST], ['$(AUTOM4TE) --language=autotest'])


	## ---------------------------------------- ##
	## Display a configure time version banner. ##
	## ---------------------------------------- ##

	# This is a sanity check so we can see what version is used in bug reports.
	AS_BOX([Configuring AC_PACKAGE_TARNAME AC_PACKAGE_VERSION])
	echo


	## ------------ ##
	## Shell tools. ##
	## ------------ ##

	AC_PROG_GNU_M4


	## ------------------------ ##
	## Automake Initialisation. ##
	## ------------------------ ##

	dnl These are bootstrap requirements! Once built, libtool may work with
	dnl much older releases of autoconf and automake. See release notes.
	dnl 1.11 is needed for color-tests, 1.11.1 fixes a security issue.
	AM_INIT_AUTOMAKE([1.11.1 gnu subdir-objects dist-xz])
	AM_SILENT_RULES([yes])


	## ------------------------- ##
	## Autobuild initialisation. ##
	## ------------------------- ##

	# You can set autobuild_mode at configure time to specify a "unique"
	# string for this build.
	: ${autobuild_mode=default}
	AB_VERSION='AC_PACKAGE_VERSION'
	AB_INIT([$autobuild_mode])


	dnl Make sure config.status is regenerated when the version timestamp changes
	AC_SUBST([CONFIG_STATUS_DEPENDENCIES], ['$(dotversion)'])


	## ------------------------------- ##
	## Libtool specific configuration. ##
	## ------------------------------- ##

	AC_SUBST([aclocaldir], ["\$(datadir)/aclocal"])
	AC_SUBST([pkgdatadir], ["\$(datadir)/$PACKAGE"])

	AC_ARG_ENABLE(ltdl-install,
	[AS_HELP_STRING([--disable-ltdl-install], [do not install libltdl])])
	if test set != "${enable_ltdl_install+set}"; then
	enable_ltdl_install=yes
	fi

	# The list of scripts required to build libltdl, and which need to be
	# installed by libtoolize --ltdl, and consequently need to be placed in
	# $pkgdatadir by our make install rule.
	pkgaux_scripts="compile config.guess config.sub depcomp install-sh missing"
	AC_SUBST([pkgaux_scripts])


	## ---------------- ##
	## compiler checks. ##
	## ---------------- ##

	# Need to be sure that we have a working C compiler, otherwise even with
	# a good C compiler: if the following C++ tests fail, the whole libtool
	# build fails!
	AC_PROG_CC
	GL_EARLY
	AM_PROG_CC_C_O
	AC_PROG_CPP

	## ----------------------- ##
	## Libtool initialisation. ##
	## ----------------------- ##
	LT_INIT([dlopen win32-dll])
	_LT_SET_OPTION([LTDL_INIT], [nonrecursive])
	_LTDL_SETUP

	# Enable all the language support we can
	LT_LANG(C++)
	LT_LANG(Objective-C)
	LT_LANG(Objective-C++)
	LT_LANG(Fortran 77)
	LT_LANG(Fortran)
	LT_LANG(Go)
	LT_LANG(Java)
	LT_LANG(Windows Resource)

	# Ensure the correct file name (and path) conversion function
	# is available to the test suite.
	AC_SUBST([to_host_file_cmd])dnl
	AC_SUBST([to_tool_file_cmd])dnl

	# Propagate --enable-aix-soname option to the testsuite.
	AC_SUBST([with_aix_soname])dnl

	## ---------------------- ##
	## Gnulib initialisation. ##
	## ---------------------- ##
	GL_INIT

	## ------------- ##
	## Documentation ##
	## ------------- ##
	AM_MISSING_PROG([HELP2MAN], [help2man])

	## -------- ##
	## Outputs. ##
	## -------- ##
	AC_CONFIG_FILES([Makefile gnulib-tests/Makefile])
	AC_OUTPUT