# relocatable.m4 serial 24 dnl Copyright (C) 2003, 2005-2007, 2009-2023 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 # . # glibc systems, Linux with musl libc: yes. Android: no. linux*-android*) ;; linux* | kfreebsd*) use_elf_origin_trick=yes ;; # Hurd: # only after the glibc commit from 2018-01-08 # 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, MidnightBSD >= 1.1: yes. freebsd | freebsd[1-7] | freebsd[1-6].* | freebsd7.[0-2]) ;; dragonfly | dragonfly[1-2] | dragonfly[1-2].*) ;; midnightbsd | midnightbsd0* | midnightbsd1.0*) ;; freebsd* | dragonfly* | midnightbsd*) 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 # . 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" ])