m4/relocatable.m4 - platform/external/bison - Git at Google

 # relocatable.m4 serial 23
 dnl Copyright (C) 2003, 2005-2007, 2009-2019 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.

 dnl From Bruno Haible.

 dnl gl_RELOCATABLE([RELOCWRAPPER-DIR])
 dnl ----------------------------------------------------------
 dnl Support for relocatable programs.
 dnl Supply RELOCWRAPPER-DIR as the directory where relocwrapper.c may be found.
 AC_DEFUN([gl_RELOCATABLE],
 [
   AC_REQUIRE([gl_RELOCATABLE_BODY])
   gl_RELOCATABLE_LIBRARY
   : ${RELOCATABLE_CONFIG_H_DIR='$(top_builddir)'}
   RELOCATABLE_SRC_DIR="\$(top_srcdir)/$gl_source_base"
   RELOCATABLE_BUILD_DIR="\$(top_builddir)/$gl_source_base"
 ])
 dnl The guts of gl_RELOCATABLE. Needs to be expanded only once.
 AC_DEFUN([gl_RELOCATABLE_BODY],
 [
   AC_REQUIRE([AC_PROG_INSTALL])

   dnl This AC_BEFORE invocation leads to unjustified autoconf warnings
   dnl when gl_RELOCATABLE_BODY is invoked more than once.
   dnl
   dnl We need this AC_BEFORE because AC_PROG_INSTALL is documented to
   dnl overwrite earlier settings of INSTALL and INSTALL_PROGRAM (even
   dnl though in autoconf-2.52..2.60 it doesn't do so), but we want this
   dnl macro's setting of INSTALL_PROGRAM to persist.
   dnl Arghh: AC_BEFORE does not work in this setting :-(
   dnl AC_BEFORE([AC_PROG_INSTALL],[gl_RELOCATABLE_BODY])
   dnl
   dnl LT_INIT sets LIBTOOL, but we want this macro's setting of LIBTOOL to
   dnl persist.
   dnl Arghh: AC_BEFORE does not work in this setting :-(
   dnl AC_BEFORE([LT_INIT],[gl_RELOCATABLE_BODY])

   AC_REQUIRE([AC_LIB_LIBPATH])
   AC_REQUIRE([gl_RELOCATABLE_LIBRARY_BODY])
   AC_REQUIRE([AC_CANONICAL_HOST])
   is_noop=no
   use_elf_origin_trick=no
   use_macos_tools=no
   use_wrapper=no
   if test $RELOCATABLE = yes; then
     # --enable-relocatable implies --disable-rpath
     enable_rpath=no
     AC_CHECK_HEADERS([mach-o/dyld.h])
     AC_CHECK_FUNCS([_NSGetExecutablePath])
     case "$host_os" in
       mingw*) is_noop=yes ;;
       # For the platforms that support $ORIGIN, see
       # <https://lekensteyn.nl/rpath.html>.
       # glibc systems, Linux with musl libc: yes. Android: no.
       linux*-android*) ;;
       linux* | kfreebsd*) use_elf_origin_trick=yes ;;
       # Hurd: <https://lists.gnu.org/r/bug-hurd/2019-02/msg00049.html>
       # only after the glibc commit from 2018-01-08
       # <https://sourceware.org/git/?p=glibc.git;a=commitdiff;h=311ba8dc4416467947eff2ab327854f124226309>
       gnu*)
         # Test for a glibc version >= 2.27.
         AC_CHECK_FUNCS([copy_file_range])
         if test $ac_cv_func_copy_file_range = yes; then
           use_elf_origin_trick=yes
         fi
         ;;
 changequote(,)dnl
       # FreeBSD >= 7.3, DragonFly >= 3.0: yes.
       freebsd | freebsd[1-7] | freebsd[1-6].* | freebsd7.[0-2]) ;;
       dragonfly | dragonfly[1-2] | dragonfly[1-2].*) ;;
       freebsd* | dragonfly*) use_elf_origin_trick=yes ;;
       # NetBSD >= 8.0: yes.
       netbsd | netbsd[1-7] | netbsd[1-7].*) ;;
       netbsdelf | netbsdelf[1-7] | netbsdelf[1-7].*) ;;
       netbsd*) use_elf_origin_trick=yes ;;
       # OpenBSD >= 5.4: yes.
       openbsd | openbsd[1-5] | openbsd[1-4].* | openbsd5.[0-3]) ;;
       openbsd*) use_elf_origin_trick=yes ;;
       # Solaris >= 10: yes.
       solaris | solaris2.[1-9] | solaris2.[1-9].*) ;;
       solaris*) use_elf_origin_trick=yes ;;
       # Haiku: yes.
       haiku*) use_elf_origin_trick=yes ;;
       # On Mac OS X 10.4 or newer, use Mac OS X tools. See
       # <https://wincent.com/wiki/@executable_path,_@load_path_and_@rpath>.
       darwin | darwin[1-7].*) ;;
       darwin*) use_macos_tools=yes ;;
 changequote([,])dnl
     esac
     if test $is_noop = yes; then
       RELOCATABLE_LDFLAGS=:
       AC_SUBST([RELOCATABLE_LDFLAGS])
     else
       if test $use_elf_origin_trick = yes || test $use_macos_tools = yes; then
         dnl Use the dynamic linker's support for relocatable programs.
         case "$ac_aux_dir" in
           /*) reloc_ldflags="$ac_aux_dir/reloc-ldflags" ;;
           *) reloc_ldflags="\$(top_builddir)/$ac_aux_dir/reloc-ldflags" ;;
         esac
         RELOCATABLE_LDFLAGS="\"$reloc_ldflags\" \"\$(host)\" \"\$(RELOCATABLE_LIBRARY_PATH)\""
         AC_SUBST([RELOCATABLE_LDFLAGS])
         if test $use_macos_tools = yes; then
           dnl Use a libtool wrapper that uses Mac OS X tools.
           case "$ac_aux_dir" in
             /*) LIBTOOL="${CONFIG_SHELL-$SHELL} $ac_aux_dir/libtool-reloc $LIBTOOL" ;;
             *) LIBTOOL="${CONFIG_SHELL-$SHELL} \$(top_builddir)/$ac_aux_dir/libtool-reloc $LIBTOOL" ;;
           esac
         fi
       else
         use_wrapper=yes
         dnl Unfortunately we cannot define INSTALL_PROGRAM to a command
         dnl consisting of more than one word - libtool doesn't support this.
         dnl So we abuse the INSTALL_PROGRAM_ENV hook, originally meant for the
         dnl 'install-strip' target.
         INSTALL_PROGRAM_ENV="RELOC_LIBRARY_PATH_VAR=\"$shlibpath_var\" RELOC_LIBRARY_PATH_VALUE=\"\$(RELOCATABLE_LIBRARY_PATH)\" RELOC_PREFIX=\"\$(prefix)\" RELOC_DESTDIR=\"\$(DESTDIR)\" RELOC_COMPILE_COMMAND=\"\$(CC) \$(CPPFLAGS) \$(CFLAGS) \$(LDFLAGS)\" RELOC_SRCDIR=\"\$(RELOCATABLE_SRC_DIR)\" RELOC_BUILDDIR=\"\$(RELOCATABLE_BUILD_DIR)\" RELOC_CONFIG_H_DIR=\"\$(RELOCATABLE_CONFIG_H_DIR)\" RELOC_EXEEXT=\"\$(EXEEXT)\" RELOC_STRIP_PROG=\"\$(RELOCATABLE_STRIP)\" RELOC_INSTALL_PROG=\"$INSTALL_PROGRAM\""
         AC_SUBST([INSTALL_PROGRAM_ENV])
         case "$ac_aux_dir" in
           /*) INSTALL_PROGRAM="$ac_aux_dir/install-reloc" ;;
           *) INSTALL_PROGRAM="\$(top_builddir)/$ac_aux_dir/install-reloc" ;;
         esac
       fi
     fi
   fi
   AM_CONDITIONAL([RELOCATABLE_VIA_LD],
     [test $is_noop = yes || test $use_elf_origin_trick = yes || test $use_macos_tools = yes])
   AM_CONDITIONAL([RELOCATABLE_VIA_WRAPPER], [test $use_wrapper = yes])

   dnl RELOCATABLE_LIBRARY_PATH can be set in configure.ac. Default is empty.
   AC_SUBST([RELOCATABLE_LIBRARY_PATH])

   AC_SUBST([RELOCATABLE_CONFIG_H_DIR])
   AC_SUBST([RELOCATABLE_SRC_DIR])
   AC_SUBST([RELOCATABLE_BUILD_DIR])

   dnl Ensure RELOCATABLE_STRIP is defined in Makefiles (at least those
   dnl generated by automake), with value ':'.
   RELOCATABLE_STRIP=':'
   AC_SUBST([RELOCATABLE_STRIP])
 ])

 dnl Determine the platform dependent parameters needed to use relocatability:
 dnl shlibpath_var.
 AC_DEFUN([AC_LIB_LIBPATH],
 [
   AC_REQUIRE([AC_LIB_PROG_LD])            dnl we use $LD
   AC_REQUIRE([AC_CANONICAL_HOST])         dnl we use $host
   AC_REQUIRE([AC_CONFIG_AUX_DIR_DEFAULT]) dnl we use $ac_aux_dir
   AC_CACHE_CHECK([for shared library path variable], [acl_cv_libpath], [
     LD="$LD" \
     ${CONFIG_SHELL-/bin/sh} "$ac_aux_dir/config.libpath" "$host" > conftest.sh
     . ./conftest.sh
     rm -f ./conftest.sh
     acl_cv_libpath=${acl_cv_shlibpath_var:-none}
   ])
   shlibpath_var="$acl_cv_shlibpath_var"
 ])
	# relocatable.m4 serial 23
	dnl Copyright (C) 2003, 2005-2007, 2009-2019 Free Software Foundation, Inc.
	dnl This file is free software; the Free Software Foundation
	dnl gives unlimited permission to copy and/or distribute it,
	dnl with or without modifications, as long as this notice is preserved.

	dnl From Bruno Haible.

	dnl gl_RELOCATABLE([RELOCWRAPPER-DIR])
	dnl ----------------------------------------------------------
	dnl Support for relocatable programs.
	dnl Supply RELOCWRAPPER-DIR as the directory where relocwrapper.c may be found.
	AC_DEFUN([gl_RELOCATABLE],
	[
	AC_REQUIRE([gl_RELOCATABLE_BODY])
	gl_RELOCATABLE_LIBRARY
	: ${RELOCATABLE_CONFIG_H_DIR='$(top_builddir)'}
	RELOCATABLE_SRC_DIR="\$(top_srcdir)/$gl_source_base"
	RELOCATABLE_BUILD_DIR="\$(top_builddir)/$gl_source_base"
	])
	dnl The guts of gl_RELOCATABLE. Needs to be expanded only once.
	AC_DEFUN([gl_RELOCATABLE_BODY],
	[
	AC_REQUIRE([AC_PROG_INSTALL])

	dnl This AC_BEFORE invocation leads to unjustified autoconf warnings
	dnl when gl_RELOCATABLE_BODY is invoked more than once.
	dnl
	dnl We need this AC_BEFORE because AC_PROG_INSTALL is documented to
	dnl overwrite earlier settings of INSTALL and INSTALL_PROGRAM (even
	dnl though in autoconf-2.52..2.60 it doesn't do so), but we want this
	dnl macro's setting of INSTALL_PROGRAM to persist.
	dnl Arghh: AC_BEFORE does not work in this setting :-(
	dnl AC_BEFORE([AC_PROG_INSTALL],[gl_RELOCATABLE_BODY])
	dnl
	dnl LT_INIT sets LIBTOOL, but we want this macro's setting of LIBTOOL to
	dnl persist.
	dnl Arghh: AC_BEFORE does not work in this setting :-(
	dnl AC_BEFORE([LT_INIT],[gl_RELOCATABLE_BODY])

	AC_REQUIRE([AC_LIB_LIBPATH])
	AC_REQUIRE([gl_RELOCATABLE_LIBRARY_BODY])
	AC_REQUIRE([AC_CANONICAL_HOST])
	is_noop=no
	use_elf_origin_trick=no
	use_macos_tools=no
	use_wrapper=no
	if test $RELOCATABLE = yes; then
	# --enable-relocatable implies --disable-rpath
	enable_rpath=no
	AC_CHECK_HEADERS([mach-o/dyld.h])
	AC_CHECK_FUNCS([_NSGetExecutablePath])
	case "$host_os" in
	mingw*) is_noop=yes ;;
	# For the platforms that support $ORIGIN, see
	# <https://lekensteyn.nl/rpath.html>.
	# glibc systems, Linux with musl libc: yes. Android: no.
	linux-android) ;;
	linux* \| kfreebsd*) use_elf_origin_trick=yes ;;
	# Hurd: <https://lists.gnu.org/r/bug-hurd/2019-02/msg00049.html>
	# only after the glibc commit from 2018-01-08
	# <https://sourceware.org/git/?p=glibc.git;a=commitdiff;h=311ba8dc4416467947eff2ab327854f124226309>
	gnu*)
	# Test for a glibc version >= 2.27.
	AC_CHECK_FUNCS([copy_file_range])
	if test $ac_cv_func_copy_file_range = yes; then
	use_elf_origin_trick=yes
	fi
	;;
	changequote(,)dnl
	# FreeBSD >= 7.3, DragonFly >= 3.0: yes.
	freebsd \| freebsd[1-7] \| freebsd[1-6].* \| freebsd7.[0-2]) ;;
	dragonfly \| dragonfly[1-2] \| dragonfly[1-2].*) ;;
	freebsd* \| dragonfly*) use_elf_origin_trick=yes ;;
	# NetBSD >= 8.0: yes.
	netbsd \| netbsd[1-7] \| netbsd[1-7].*) ;;
	netbsdelf \| netbsdelf[1-7] \| netbsdelf[1-7].*) ;;
	netbsd*) use_elf_origin_trick=yes ;;
	# OpenBSD >= 5.4: yes.
	openbsd \| openbsd[1-5] \| openbsd[1-4].* \| openbsd5.[0-3]) ;;
	openbsd*) use_elf_origin_trick=yes ;;
	# Solaris >= 10: yes.
	solaris \| solaris2.[1-9] \| solaris2.[1-9].*) ;;
	solaris*) use_elf_origin_trick=yes ;;
	# Haiku: yes.
	haiku*) use_elf_origin_trick=yes ;;
	# On Mac OS X 10.4 or newer, use Mac OS X tools. See
	# <https://wincent.com/wiki/@executable_path,_@load_path_and_@rpath>.
	darwin \| darwin[1-7].*) ;;
	darwin*) use_macos_tools=yes ;;
	changequote([,])dnl
	esac
	if test $is_noop = yes; then
	RELOCATABLE_LDFLAGS=:
	AC_SUBST([RELOCATABLE_LDFLAGS])
	else
	if test $use_elf_origin_trick = yes \|\| test $use_macos_tools = yes; then
	dnl Use the dynamic linker's support for relocatable programs.
	case "$ac_aux_dir" in
	/*) reloc_ldflags="$ac_aux_dir/reloc-ldflags" ;;
	*) reloc_ldflags="\$(top_builddir)/$ac_aux_dir/reloc-ldflags" ;;
	esac
	RELOCATABLE_LDFLAGS="\"$reloc_ldflags\" \"\$(host)\" \"\$(RELOCATABLE_LIBRARY_PATH)\""
	AC_SUBST([RELOCATABLE_LDFLAGS])
	if test $use_macos_tools = yes; then
	dnl Use a libtool wrapper that uses Mac OS X tools.
	case "$ac_aux_dir" in
	/*) LIBTOOL="${CONFIG_SHELL-$SHELL} $ac_aux_dir/libtool-reloc $LIBTOOL" ;;
	*) LIBTOOL="${CONFIG_SHELL-$SHELL} \$(top_builddir)/$ac_aux_dir/libtool-reloc $LIBTOOL" ;;
	esac
	fi
	else
	use_wrapper=yes
	dnl Unfortunately we cannot define INSTALL_PROGRAM to a command
	dnl consisting of more than one word - libtool doesn't support this.
	dnl So we abuse the INSTALL_PROGRAM_ENV hook, originally meant for the
	dnl 'install-strip' target.
	INSTALL_PROGRAM_ENV="RELOC_LIBRARY_PATH_VAR=\"$shlibpath_var\" RELOC_LIBRARY_PATH_VALUE=\"\$(RELOCATABLE_LIBRARY_PATH)\" RELOC_PREFIX=\"\$(prefix)\" RELOC_DESTDIR=\"\$(DESTDIR)\" RELOC_COMPILE_COMMAND=\"\$(CC) \$(CPPFLAGS) \$(CFLAGS) \$(LDFLAGS)\" RELOC_SRCDIR=\"\$(RELOCATABLE_SRC_DIR)\" RELOC_BUILDDIR=\"\$(RELOCATABLE_BUILD_DIR)\" RELOC_CONFIG_H_DIR=\"\$(RELOCATABLE_CONFIG_H_DIR)\" RELOC_EXEEXT=\"\$(EXEEXT)\" RELOC_STRIP_PROG=\"\$(RELOCATABLE_STRIP)\" RELOC_INSTALL_PROG=\"$INSTALL_PROGRAM\""
	AC_SUBST([INSTALL_PROGRAM_ENV])
	case "$ac_aux_dir" in
	/*) INSTALL_PROGRAM="$ac_aux_dir/install-reloc" ;;
	*) INSTALL_PROGRAM="\$(top_builddir)/$ac_aux_dir/install-reloc" ;;
	esac
	fi
	fi
	fi
	AM_CONDITIONAL([RELOCATABLE_VIA_LD],
	[test $is_noop = yes \|\| test $use_elf_origin_trick = yes \|\| test $use_macos_tools = yes])
	AM_CONDITIONAL([RELOCATABLE_VIA_WRAPPER], [test $use_wrapper = yes])

	dnl RELOCATABLE_LIBRARY_PATH can be set in configure.ac. Default is empty.
	AC_SUBST([RELOCATABLE_LIBRARY_PATH])

	AC_SUBST([RELOCATABLE_CONFIG_H_DIR])
	AC_SUBST([RELOCATABLE_SRC_DIR])
	AC_SUBST([RELOCATABLE_BUILD_DIR])

	dnl Ensure RELOCATABLE_STRIP is defined in Makefiles (at least those
	dnl generated by automake), with value ':'.
	RELOCATABLE_STRIP=':'
	AC_SUBST([RELOCATABLE_STRIP])
	])

	dnl Determine the platform dependent parameters needed to use relocatability:
	dnl shlibpath_var.
	AC_DEFUN([AC_LIB_LIBPATH],
	[
	AC_REQUIRE([AC_LIB_PROG_LD]) dnl we use $LD
	AC_REQUIRE([AC_CANONICAL_HOST]) dnl we use $host
	AC_REQUIRE([AC_CONFIG_AUX_DIR_DEFAULT]) dnl we use $ac_aux_dir
	AC_CACHE_CHECK([for shared library path variable], [acl_cv_libpath], [
	LD="$LD" \
	${CONFIG_SHELL-/bin/sh} "$ac_aux_dir/config.libpath" "$host" > conftest.sh
	. ./conftest.sh
	rm -f ./conftest.sh
	acl_cv_libpath=${acl_cv_shlibpath_var:-none}
	])
	shlibpath_var="$acl_cv_shlibpath_var"
	])