1# relocatable.m4 serial 5 (gettext-0.15)
2dnl Copyright (C) 2003, 2005-2006 Free Software Foundation, Inc.
3dnl This file is free software; the Free Software Foundation
4dnl gives unlimited permission to copy and/or distribute it,
5dnl with or without modifications, as long as this notice is preserved.
6
7dnl From Bruno Haible.
8
9dnl Support for relocateble programs.
10AC_DEFUN([AC_RELOCATABLE],
11[
12  AC_REQUIRE([AC_PROG_INSTALL])
13  AC_BEFORE([AC_PROG_INSTALL],[AC_RELOCATABLE])
14  AC_REQUIRE([AC_LIB_LIBPATH])
15  AC_REQUIRE([AC_RELOCATABLE_LIBRARY])
16  AC_REQUIRE([AC_EXEEXT])
17  is_noop=no
18  use_elf_origin_trick=no
19  if test $RELOCATABLE = yes; then
20    # --enable-relocatable implies --disable-rpath
21    enable_rpath=no
22    AC_LIBOBJ([relocatable])
23    AC_DEFINE([ENABLE_RELOCATABLE], 1,
24      [Define to 1 if the package shall run at any location in the filesystem.])
25    AC_CHECK_HEADERS([unistd.h mach-o/dyld.h])
26    AC_CHECK_FUNCS([_NSGetExecutablePath])
27    case "$host_os" in
28      mingw*) is_noop=yes ;;
29      linux*) use_elf_origin_trick=yes ;;
30    esac
31    if test $is_noop = yes; then
32      SET_RELOCATABLE="RELOCATABLE_LDFLAGS = :"
33    else
34      if test $use_elf_origin_trick = yes; then
35        dnl Use the dynamic linker's support for relocatable programs.
36        case "$ac_aux_dir" in
37          /*) reloc_ldflags="$ac_aux_dir/reloc-ldflags" ;;
38          *) reloc_ldflags="\$(top_builddir)/$ac_aux_dir/reloc-ldflags" ;;
39        esac
40        SET_RELOCATABLE="RELOCATABLE_LDFLAGS = \"$reloc_ldflags\" \"\$(host)\" \"\$(RELOCATABLE_LIBRARY_PATH)\""
41      else
42        dnl Unfortunately we cannot define INSTALL_PROGRAM to a command
43        dnl consisting of more than one word - libtool doesn't support this.
44        dnl So we abuse the INSTALL_PROGRAM_ENV hook, originally meant for the
45        dnl 'install-strip' target.
46        SET_RELOCATABLE="INSTALL_PROGRAM_ENV = RELOC_LIBRARY_PATH_VAR=\"$shlibpath_var\" RELOC_LIBRARY_PATH_VALUE=\"\$(RELOCATABLE_LIBRARY_PATH)\" RELOC_PREFIX=\"\$(prefix)\" 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_INSTALL_PROG=\"$INSTALL_PROGRAM\""
47        case "$ac_aux_dir" in
48          /*) INSTALL_PROGRAM="$ac_aux_dir/install-reloc" ;;
49          *) INSTALL_PROGRAM="\$(top_builddir)/$ac_aux_dir/install-reloc" ;;
50        esac
51      fi
52    fi
53  else
54    SET_RELOCATABLE=
55  fi
56  AC_SUBST([SET_RELOCATABLE])
57  AM_CONDITIONAL([RELOCATABLE_VIA_LD],
58    [test $is_noop = yes || test $use_elf_origin_trick = yes])
59])
60
61dnl Support for relocatable libraries.
62AC_DEFUN([AC_RELOCATABLE_LIBRARY],
63[
64  AC_REQUIRE([AC_RELOCATABLE_NOP])
65  dnl Easier to put this here once, instead of into the DEFS of each Makefile.
66  if test "X$prefix" = "XNONE"; then
67    reloc_final_prefix="$ac_default_prefix"
68  else
69    reloc_final_prefix="$prefix"
70  fi
71  AC_DEFINE_UNQUOTED([INSTALLPREFIX], ["${reloc_final_prefix}"],
72    [Define to the value of ${prefix}, as a string.])
73])
74
75dnl Support for relocatable packages for which it is a nop.
76AC_DEFUN([AC_RELOCATABLE_NOP],
77[
78  AC_MSG_CHECKING([whether to activate relocatable installation])
79  AC_ARG_ENABLE(relocatable,
80    [  --enable-relocatable    install a package that can be moved in the filesystem],
81    [if test "$enableval" != no; then
82       RELOCATABLE=yes
83     else
84       RELOCATABLE=no
85     fi
86    ], RELOCATABLE=no)
87  AC_SUBST(RELOCATABLE)
88  AC_MSG_RESULT([$RELOCATABLE])
89])
90
91dnl Determine the platform dependent parameters needed to use relocatability:
92dnl shlibpath_var.
93AC_DEFUN([AC_LIB_LIBPATH],
94[
95  AC_REQUIRE([AC_LIB_PROG_LD])            dnl we use $LD
96  AC_REQUIRE([AC_CANONICAL_HOST])         dnl we use $host
97  AC_REQUIRE([AC_CONFIG_AUX_DIR_DEFAULT]) dnl we use $ac_aux_dir
98  AC_CACHE_CHECK([for shared library path variable], acl_cv_libpath, [
99    LD="$LD" \
100    ${CONFIG_SHELL-/bin/sh} "$ac_aux_dir/config.libpath" "$host" > conftest.sh
101    . ./conftest.sh
102    rm -f ./conftest.sh
103    acl_cv_libpath=${acl_cv_shlibpath_var:-none}
104  ])
105  shlibpath_var="$acl_cv_shlibpath_var"
106])
107