1# relocatable.m4 serial 7 (gettext-0.16)
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_RELOCATABLE_BODY])
13  if test $RELOCATABLE = yes; then
14    AC_LIBOBJ([relocatable])
15  fi
16])
17dnl The guts of AC_RELOCATABLE. Needs to be expanded only once.
18AC_DEFUN([AC_RELOCATABLE_BODY],
19[
20  AC_REQUIRE([AC_PROG_INSTALL])
21  dnl This AC_BEFORE invocation leads to unjustified autoconf warnings
22  dnl when AC_RELOCATABLE_BODY is invoked more than once.
23  dnl We need this AC_BEFORE because AC_PROG_INSTALL is documented to
24  dnl overwrite earlier settings of INSTALL and INSTALL_PROGRAM (even
25  dnl though in autoconf-2.52..2.60 it doesn't do so), but we want this
26  dnl macro's setting of INSTALL_PROGRAM to persist.
27  AC_BEFORE([AC_PROG_INSTALL],[AC_RELOCATABLE_BODY])
28  AC_REQUIRE([AC_LIB_LIBPATH])
29  AC_REQUIRE([AC_RELOCATABLE_LIBRARY])
30  AC_REQUIRE([AC_EXEEXT])
31  is_noop=no
32  use_elf_origin_trick=no
33  if test $RELOCATABLE = yes; then
34    # --enable-relocatable implies --disable-rpath
35    enable_rpath=no
36    AC_DEFINE([ENABLE_RELOCATABLE], 1,
37      [Define to 1 if the package shall run at any location in the filesystem.])
38    AC_CHECK_HEADERS([unistd.h mach-o/dyld.h])
39    AC_CHECK_FUNCS([_NSGetExecutablePath])
40    case "$host_os" in
41      mingw*) is_noop=yes ;;
42      linux*) use_elf_origin_trick=yes ;;
43    esac
44    if test $is_noop = yes; then
45      SET_RELOCATABLE="RELOCATABLE_LDFLAGS = :"
46    else
47      if test $use_elf_origin_trick = yes; then
48        dnl Use the dynamic linker's support for relocatable programs.
49        case "$ac_aux_dir" in
50          /*) reloc_ldflags="$ac_aux_dir/reloc-ldflags" ;;
51          *) reloc_ldflags="\$(top_builddir)/$ac_aux_dir/reloc-ldflags" ;;
52        esac
53        SET_RELOCATABLE="RELOCATABLE_LDFLAGS = \"$reloc_ldflags\" \"\$(host)\" \"\$(RELOCATABLE_LIBRARY_PATH)\""
54      else
55        dnl Unfortunately we cannot define INSTALL_PROGRAM to a command
56        dnl consisting of more than one word - libtool doesn't support this.
57        dnl So we abuse the INSTALL_PROGRAM_ENV hook, originally meant for the
58        dnl 'install-strip' target.
59        SET_RELOCATABLE="INSTALL_PROGRAM_ENV = RELOC_LIBRARY_PATH_VAR=\"$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=\"$INSTALL_PROGRAM\""
60        case "$ac_aux_dir" in
61          /*) INSTALL_PROGRAM="$ac_aux_dir/install-reloc" ;;
62          *) INSTALL_PROGRAM="\$(top_builddir)/$ac_aux_dir/install-reloc" ;;
63        esac
64      fi
65    fi
66  else
67    SET_RELOCATABLE=
68  fi
69  AC_SUBST([SET_RELOCATABLE])
70  AM_CONDITIONAL([RELOCATABLE_VIA_LD],
71    [test $is_noop = yes || test $use_elf_origin_trick = yes])
72])
73
74dnl Support for relocatable libraries.
75AC_DEFUN([AC_RELOCATABLE_LIBRARY],
76[
77  AC_REQUIRE([AC_RELOCATABLE_NOP])
78  dnl Easier to put this here once, instead of into the DEFS of each Makefile.
79  if test "X$prefix" = "XNONE"; then
80    reloc_final_prefix="$ac_default_prefix"
81  else
82    reloc_final_prefix="$prefix"
83  fi
84  AC_DEFINE_UNQUOTED([INSTALLPREFIX], ["${reloc_final_prefix}"],
85    [Define to the value of ${prefix}, as a string.])
86])
87
88dnl Support for relocatable packages for which it is a nop.
89AC_DEFUN([AC_RELOCATABLE_NOP],
90[
91  AC_MSG_CHECKING([whether to activate relocatable installation])
92  AC_ARG_ENABLE(relocatable,
93    [  --enable-relocatable    install a package that can be moved in the filesystem],
94    [if test "$enableval" != no; then
95       RELOCATABLE=yes
96     else
97       RELOCATABLE=no
98     fi
99    ], RELOCATABLE=no)
100  AC_SUBST(RELOCATABLE)
101  AC_MSG_RESULT([$RELOCATABLE])
102])
103
104dnl Determine the platform dependent parameters needed to use relocatability:
105dnl shlibpath_var.
106AC_DEFUN([AC_LIB_LIBPATH],
107[
108  AC_REQUIRE([AC_LIB_PROG_LD])            dnl we use $LD
109  AC_REQUIRE([AC_CANONICAL_HOST])         dnl we use $host
110  AC_REQUIRE([AC_CONFIG_AUX_DIR_DEFAULT]) dnl we use $ac_aux_dir
111  AC_CACHE_CHECK([for shared library path variable], acl_cv_libpath, [
112    LD="$LD" \
113    ${CONFIG_SHELL-/bin/sh} "$ac_aux_dir/config.libpath" "$host" > conftest.sh
114    . ./conftest.sh
115    rm -f ./conftest.sh
116    acl_cv_libpath=${acl_cv_shlibpath_var:-none}
117  ])
118  shlibpath_var="$acl_cv_shlibpath_var"
119])
120