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106 lines
4.5 KiB
106 lines
4.5 KiB
4 years ago
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# relocatable.m4 serial 18
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dnl Copyright (C) 2003, 2005-2007, 2009-2017 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 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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AC_BEFORE([AC_PROG_INSTALL],[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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is_noop=no
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use_elf_origin_trick=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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linux* | kfreebsd*) use_elf_origin_trick=yes ;;
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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 $use_elf_origin_trick = yes; then
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dnl Use the dynamic linker's support for relocatable programs.
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case "$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="\"$reloc_ldflags\" \"\$(host)\" \"\$(RELOCATABLE_LIBRARY_PATH)\""
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AC_SUBST([RELOCATABLE_LDFLAGS])
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else
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use_wrapper=yes
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dnl Unfortunately we cannot define INSTALL_PROGRAM to a command
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dnl consisting of more than one word - libtool doesn't support this.
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dnl So we abuse the INSTALL_PROGRAM_ENV hook, originally meant for the
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dnl 'install-strip' target.
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INSTALL_PROGRAM_ENV="RELOC_LIBRARY_PATH_VAR=\"$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])
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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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