161 lines
6.9 KiB
Plaintext
161 lines
6.9 KiB
Plaintext
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# relocatable.m4 serial 24
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dnl Copyright (C) 2003, 2005-2007, 2009-2022 Free Software Foundation, Inc.
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dnl This file is free software; the Free Software Foundation
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dnl gives unlimited permission to copy and/or distribute it,
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dnl with or without modifications, as long as this notice is preserved.
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dnl From Bruno Haible.
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dnl gl_RELOCATABLE([RELOCWRAPPER-DIR])
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dnl ----------------------------------------------------------
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dnl Support for relocatable programs.
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dnl Supply RELOCWRAPPER-DIR as the directory where relocwrapper.c may be found.
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AC_DEFUN([gl_RELOCATABLE],
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[
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AC_REQUIRE([gl_RELOCATABLE_BODY])
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gl_RELOCATABLE_LIBRARY
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: ${RELOCATABLE_CONFIG_H_DIR='$(top_builddir)'}
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RELOCATABLE_SRC_DIR="\$(top_srcdir)/$gl_source_base"
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RELOCATABLE_BUILD_DIR="\$(top_builddir)/$gl_source_base"
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])
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dnl The guts of gl_RELOCATABLE. Needs to be expanded only once.
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AC_DEFUN([gl_RELOCATABLE_BODY],
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[
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AC_REQUIRE([AC_PROG_INSTALL])
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dnl This AC_BEFORE invocation leads to unjustified autoconf warnings
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dnl when gl_RELOCATABLE_BODY is invoked more than once.
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dnl
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dnl We need this AC_BEFORE because AC_PROG_INSTALL is documented to
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dnl overwrite earlier settings of INSTALL and INSTALL_PROGRAM (even
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dnl though in autoconf-2.52..2.60 it doesn't do so), but we want this
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dnl macro's setting of INSTALL_PROGRAM to persist.
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dnl Arghh: AC_BEFORE does not work in this setting :-(
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dnl AC_BEFORE([AC_PROG_INSTALL],[gl_RELOCATABLE_BODY])
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dnl
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dnl LT_INIT sets LIBTOOL, but we want this macro's setting of LIBTOOL to
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dnl persist.
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dnl Arghh: AC_BEFORE does not work in this setting :-(
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dnl AC_BEFORE([LT_INIT],[gl_RELOCATABLE_BODY])
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AC_REQUIRE([AC_LIB_LIBPATH])
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AC_REQUIRE([gl_RELOCATABLE_LIBRARY_BODY])
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AC_REQUIRE([AC_CANONICAL_HOST])
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is_noop=no
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use_elf_origin_trick=no
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use_macos_tools=no
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use_wrapper=no
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if test $RELOCATABLE = yes; then
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# --enable-relocatable implies --disable-rpath
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enable_rpath=no
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AC_CHECK_HEADERS([mach-o/dyld.h])
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AC_CHECK_FUNCS([_NSGetExecutablePath])
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case "$host_os" in
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mingw*) is_noop=yes ;;
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# For the platforms that support $ORIGIN, see
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# <https://lekensteyn.nl/rpath.html>.
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# glibc systems, Linux with musl libc: yes. Android: no.
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linux*-android*) ;;
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linux* | kfreebsd*) use_elf_origin_trick=yes ;;
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# Hurd: <https://lists.gnu.org/r/bug-hurd/2019-02/msg00049.html>
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# only after the glibc commit from 2018-01-08
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# <https://sourceware.org/git/?p=glibc.git;a=commitdiff;h=311ba8dc4416467947eff2ab327854f124226309>
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gnu*)
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# Test for a glibc version >= 2.27.
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AC_CHECK_FUNCS([copy_file_range])
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if test $ac_cv_func_copy_file_range = yes; then
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use_elf_origin_trick=yes
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fi
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;;
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changequote(,)dnl
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# FreeBSD >= 7.3, DragonFly >= 3.0, MidnightBSD >= 1.1: yes.
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freebsd | freebsd[1-7] | freebsd[1-6].* | freebsd7.[0-2]) ;;
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dragonfly | dragonfly[1-2] | dragonfly[1-2].*) ;;
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midnightbsd | midnightbsd0* | midnightbsd1.0*) ;;
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freebsd* | dragonfly* | midnightbsd*) use_elf_origin_trick=yes ;;
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# NetBSD >= 8.0: yes.
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netbsd | netbsd[1-7] | netbsd[1-7].*) ;;
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netbsdelf | netbsdelf[1-7] | netbsdelf[1-7].*) ;;
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netbsd*) use_elf_origin_trick=yes ;;
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# OpenBSD >= 5.4: yes.
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openbsd | openbsd[1-5] | openbsd[1-4].* | openbsd5.[0-3]) ;;
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openbsd*) use_elf_origin_trick=yes ;;
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# Solaris >= 10: yes.
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solaris | solaris2.[1-9] | solaris2.[1-9].*) ;;
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solaris*) use_elf_origin_trick=yes ;;
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# Haiku: yes.
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haiku*) use_elf_origin_trick=yes ;;
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# On Mac OS X 10.4 or newer, use Mac OS X tools. See
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# <https://wincent.com/wiki/@executable_path,_@load_path_and_@rpath>.
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darwin | darwin[1-7].*) ;;
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darwin*) use_macos_tools=yes ;;
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changequote([,])dnl
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esac
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if test $is_noop = yes; then
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RELOCATABLE_LDFLAGS=:
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AC_SUBST([RELOCATABLE_LDFLAGS])
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else
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if test $use_elf_origin_trick = yes || test $use_macos_tools = yes; then
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dnl Use the dynamic linker's support for relocatable programs.
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case "$ac_aux_dir" in
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/*) reloc_ldflags="$ac_aux_dir/reloc-ldflags" ;;
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*) reloc_ldflags="\$(top_builddir)/$ac_aux_dir/reloc-ldflags" ;;
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esac
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RELOCATABLE_LDFLAGS="\"$reloc_ldflags\" \"\$(host)\" \"\$(RELOCATABLE_LIBRARY_PATH)\""
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AC_SUBST([RELOCATABLE_LDFLAGS])
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if test $use_macos_tools = yes; then
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dnl Use a libtool wrapper that uses Mac OS X tools.
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case "$ac_aux_dir" in
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/*) LIBTOOL="${CONFIG_SHELL-$SHELL} $ac_aux_dir/libtool-reloc $LIBTOOL" ;;
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*) LIBTOOL="${CONFIG_SHELL-$SHELL} \$(top_builddir)/$ac_aux_dir/libtool-reloc $LIBTOOL" ;;
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esac
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fi
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else
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use_wrapper=yes
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dnl Unfortunately we cannot define INSTALL_PROGRAM to a command
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dnl consisting of more than one word - libtool doesn't support this.
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dnl So we abuse the INSTALL_PROGRAM_ENV hook, originally meant for the
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dnl 'install-strip' target.
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INSTALL_PROGRAM_ENV="RELOC_LIBRARY_PATH_VAR=\"$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=\"$INSTALL_PROGRAM\""
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AC_SUBST([INSTALL_PROGRAM_ENV])
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case "$ac_aux_dir" in
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/*) INSTALL_PROGRAM="$ac_aux_dir/install-reloc" ;;
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*) INSTALL_PROGRAM="\$(top_builddir)/$ac_aux_dir/install-reloc" ;;
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esac
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fi
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fi
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fi
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AM_CONDITIONAL([RELOCATABLE_VIA_LD],
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[test $is_noop = yes || test $use_elf_origin_trick = yes || test $use_macos_tools = yes])
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AM_CONDITIONAL([RELOCATABLE_VIA_WRAPPER], [test $use_wrapper = yes])
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dnl RELOCATABLE_LIBRARY_PATH can be set in configure.ac. Default is empty.
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AC_SUBST([RELOCATABLE_LIBRARY_PATH])
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AC_SUBST([RELOCATABLE_CONFIG_H_DIR])
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AC_SUBST([RELOCATABLE_SRC_DIR])
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AC_SUBST([RELOCATABLE_BUILD_DIR])
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dnl Ensure RELOCATABLE_STRIP is defined in Makefiles (at least those
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dnl generated by automake), with value ':'.
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RELOCATABLE_STRIP=':'
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AC_SUBST([RELOCATABLE_STRIP])
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])
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dnl Determine the platform dependent parameters needed to use relocatability:
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dnl shlibpath_var.
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AC_DEFUN([AC_LIB_LIBPATH],
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[
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AC_REQUIRE([AC_LIB_PROG_LD]) dnl we use $LD
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AC_REQUIRE([AC_CANONICAL_HOST]) dnl we use $host
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AC_REQUIRE([AC_CONFIG_AUX_DIR_DEFAULT]) dnl we use $ac_aux_dir
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AC_CACHE_CHECK([for shared library path variable], [acl_cv_libpath], [
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LD="$LD" \
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${CONFIG_SHELL-/bin/sh} "$ac_aux_dir/config.libpath" "$host" > conftest.sh
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. ./conftest.sh
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rm -f ./conftest.sh
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acl_cv_libpath=${acl_cv_shlibpath_var:-none}
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])
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shlibpath_var="$acl_cv_shlibpath_var"
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])
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