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# 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: <http://lists.gnu.org/archive/html/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"
])
|
