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328 lines
10 KiB
328 lines
10 KiB
## ltdl.m4 - Configure ltdl for the target system. -*-Shell-script-*- |
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## Copyright (C) 1999-2000 Free Software Foundation, Inc. |
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## |
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## This program is free software; you can redistribute it and/or modify |
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## it under the terms of the GNU General Public License as published by |
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## the Free Software Foundation; either version 2 of the License, or |
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## (at your option) any later version. |
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## |
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## This program is distributed in the hope that it will be useful, but |
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## WITHOUT ANY WARRANTY; without even the implied warranty of |
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## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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## General Public License for more details. |
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## |
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## You should have received a copy of the GNU General Public License |
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## along with this program; if not, write to the Free Software |
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## Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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## |
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## As a special exception to the GNU General Public License, if you |
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## distribute this file as part of a program that contains a |
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## configuration script generated by Autoconf, you may include it under |
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## the same distribution terms that you use for the rest of that program. |
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# serial 2 AC_LIB_LTDL |
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# AC_LIB_LTDL |
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# ----------- |
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# Perform all the checks necessary for compilation of the ltdl objects |
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# -- including compiler checks and header checks. |
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AC_DEFUN(AC_LIB_LTDL, |
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[AC_PREREQ(2.13) |
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AC_REQUIRE([AC_PROG_CC]) |
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AC_REQUIRE([AC_C_CONST]) |
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AC_REQUIRE([AC_HEADER_STDC]) |
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AC_REQUIRE([AC_HEADER_DIRENT]) |
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AC_REQUIRE([AC_LIBTOOL_HEADER_ASSERT]) |
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AC_REQUIRE([_LT_AC_CHECK_DLFCN]) |
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AC_REQUIRE([AC_LTDL_ENABLE_INSTALL]) |
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AC_REQUIRE([AC_LTDL_SHLIBEXT]) |
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AC_REQUIRE([AC_LTDL_SHLIBPATH]) |
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AC_REQUIRE([AC_LTDL_SYSSEARCHPATH]) |
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AC_REQUIRE([AC_LTDL_OBJDIR]) |
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AC_REQUIRE([AC_LTDL_DLPREOPEN]) |
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AC_REQUIRE([AC_LTDL_DLLIB]) |
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AC_REQUIRE([AC_LTDL_SYMBOL_USCORE]) |
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AC_REQUIRE([AC_LTDL_DLSYM_USCORE]) |
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AC_REQUIRE([AC_LTDL_SYS_DLOPEN_DEPLIBS]) |
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AC_REQUIRE([AC_LTDL_FUNC_ARGZ]) |
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AC_CHECK_HEADERS([errno.h malloc.h memory.h stdlib.h stdio.h ctype.h unistd.h]) |
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AC_CHECK_HEADERS([dl.h sys/dl.h dld.h]) |
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AC_CHECK_HEADERS([string.h strings.h], break) |
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AC_CHECK_FUNCS([strchr index], break) |
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AC_CHECK_FUNCS([strrchr rindex], break) |
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AC_CHECK_FUNCS([memcpy bcopy], break) |
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AC_CHECK_FUNCS([memmove strcmp]) |
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])# AC_LIB_LTDL |
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# AC_LTDL_ENABLE_INSTALL |
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# ---------------------- |
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AC_DEFUN(AC_LTDL_ENABLE_INSTALL, |
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[AC_ARG_ENABLE(ltdl-install, |
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[ --enable-ltdl-install install libltdl]) |
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AM_CONDITIONAL(INSTALL_LTDL, test x"${enable_ltdl_install-no}" != xno) |
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AM_CONDITIONAL(CONVENIENCE_LTDL, test x"${enable_ltdl_convenience-no}" != xno) |
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])])# AC_LTDL_ENABLE_INSTALL |
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# AC_LTDL_SYS_DLOPEN_DEPLIBS |
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# -------------------------- |
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AC_DEFUN(AC_LTDL_SYS_DLOPEN_DEPLIBS, |
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[AC_REQUIRE([AC_CANONICAL_HOST]) |
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AC_CACHE_CHECK([whether deplibs are loaded by dlopen], |
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libltdl_cv_sys_dlopen_deplibs, [dnl |
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# PORTME does your system automatically load deplibs for dlopen()? |
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libltdl_cv_sys_dlopen_deplibs=unknown |
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case "$host_os" in |
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linux*) |
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libltdl_cv_sys_dlopen_deplibs=yes |
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;; |
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netbsd*) |
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libltdl_cv_sys_dlopen_deplibs=yes |
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;; |
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openbsd*) |
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libltdl_cv_sys_dlopen_deplibs=yes |
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;; |
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solaris*) |
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libltdl_cv_sys_dlopen_deplibs=yes |
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;; |
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esac |
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]) |
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if test "$libltdl_cv_sys_dlopen_deplibs" != yes; then |
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AC_DEFINE(LTDL_DLOPEN_DEPLIBS, 1, |
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[Define if the OS needs help to load dependent libraries for dlopen(). ]) |
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fi |
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])# AC_LTDL_SYS_DLOPEN_DEPLIBS |
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# AC_LTDL_SHLIBEXT |
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# ---------------- |
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AC_DEFUN(AC_LTDL_SHLIBEXT, |
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[AC_REQUIRE([_LT_AC_LTCONFIG_HACK]) |
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AC_CACHE_CHECK([which extension is used for shared libraries], |
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libltdl_cv_shlibext, |
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[ac_last= |
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for ac_spec in $library_names_spec; do |
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ac_last="$ac_spec" |
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done |
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echo "$ac_last" | [sed 's/\[.*\]//;s/^[^.]*//;s/\$.*$//;s/\.$//'] > conftest |
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libltdl_cv_shlibext=`cat conftest` |
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rm -f conftest |
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]) |
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if test -n "$libltdl_cv_shlibext"; then |
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AC_DEFINE_UNQUOTED(LTDL_SHLIB_EXT, "$libltdl_cv_shlibext", |
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[Define to the extension used for shared libraries, say, ".so". ]) |
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fi |
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])# AC_LTDL_SHLIBEXT |
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# AC_LTDL_SHLIBPATH |
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# ----------------- |
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AC_DEFUN(AC_LTDL_SHLIBPATH, |
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[AC_REQUIRE([_LT_AC_LTCONFIG_HACK]) |
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AC_CACHE_CHECK([which variable specifies run-time library path], |
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libltdl_cv_shlibpath_var, [libltdl_cv_shlibpath_var="$shlibpath_var"]) |
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if test -n "$libltdl_cv_shlibpath_var"; then |
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AC_DEFINE_UNQUOTED(LTDL_SHLIBPATH_VAR, "$libltdl_cv_shlibpath_var", |
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[Define to the name of the environment variable that determines the dynamic library search path. ]) |
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fi |
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])# AC_LTDL_SHLIBPATH |
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# AC_LTDL_SYSSEARCHPATH |
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# --------------------- |
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AC_DEFUN(AC_LTDL_SYSSEARCHPATH, |
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[AC_REQUIRE([_LT_AC_LTCONFIG_HACK]) |
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AC_CACHE_CHECK([for the default library search path], |
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libltdl_cv_sys_search_path, [libltdl_cv_sys_search_path="$sys_lib_dlsearch_path_spec"]) |
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if test -n "$libltdl_cv_sys_search_path"; then |
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case "$host" in |
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*-*-mingw*) pathsep=";" ;; |
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*) pathsep=":" ;; |
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esac |
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sys_search_path= |
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for dir in $libltdl_cv_sys_search_path; do |
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if test -z "$sys_search_path"; then |
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sys_search_path="$dir" |
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else |
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sys_search_path="$sys_search_path$pathsep$dir" |
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fi |
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done |
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AC_DEFINE_UNQUOTED(LTDL_SYSSEARCHPATH, "$sys_search_path", |
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[Define to the system default library search path. ]) |
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fi |
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])# AC_LTDL_SYSSEARCHPATH |
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# AC_LTDL_OBJDIR |
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# -------------- |
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AC_DEFUN(AC_LTDL_OBJDIR, |
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[AC_CACHE_CHECK([for objdir], |
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libltdl_cv_objdir, [libltdl_cv_objdir="$objdir" |
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if test -n "$objdir"; then |
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: |
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else |
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rm -f .libs 2>/dev/null |
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mkdir .libs 2>/dev/null |
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if test -d .libs; then |
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libltdl_cv_objdir=.libs |
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else |
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# MS-DOS does not allow filenames that begin with a dot. |
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libltdl_cv_objdir=_libs |
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fi |
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rmdir .libs 2>/dev/null |
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fi]) |
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AC_DEFINE_UNQUOTED(LTDL_OBJDIR, "$libltdl_cv_objdir/", |
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[Define to the sub-directory in which libtool stores uninstalled libraries. ]) |
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])# AC_LTDL_OBJDIR |
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# AC_LTDL_DLPREOPEN |
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# ----------------- |
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AC_DEFUN(AC_LTDL_DLPREOPEN, |
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[AC_REQUIRE([AC_LIBTOOL_SYS_GLOBAL_SYMBOL_PIPE])dnl |
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AC_CACHE_CHECK([whether libtool supports -dlopen/-dlpreopen], |
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libltdl_cv_preloaded_symbols, [dnl |
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if test -n "$global_symbol_pipe"; then |
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libltdl_cv_preloaded_symbols=yes |
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else |
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libltdl_cv_preloaded_symbols=no |
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fi |
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]) |
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if test x"$libltdl_cv_preloaded_symbols" = x"yes"; then |
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AC_DEFINE(HAVE_PRELOADED_SYMBOLS, 1, |
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[Define if libtool can extract symbol lists from object files. ]) |
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fi |
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])# AC_LTDL_DLPREOPEN |
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# AC_LTDL_DLLIB |
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# ------------- |
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AC_DEFUN(AC_LTDL_DLLIB, |
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[LIBADD_DL= |
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AC_CHECK_LIB(dl, dlopen, [AC_DEFINE(HAVE_LIBDL, 1, |
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[Define if you have the libdl library or equivalent. ]) LIBADD_DL="-ldl"], |
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[AC_CHECK_FUNC(dlopen, [AC_DEFINE(HAVE_LIBDL, 1, |
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[Define if you have the libdl library or equivalent.])], |
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[AC_CHECK_LIB(svld, dlopen, [AC_DEFINE(HAVE_LIBDL, 1, |
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[Define if you have the libdl library or equivalent.]) LIBADD_DL="-lsvld"] |
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)])]) |
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AC_CHECK_FUNC(shl_load, [AC_DEFINE(HAVE_SHL_LOAD, 1, |
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[Define if you have the shl_load function.])], |
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[AC_CHECK_LIB(dld, shl_load, |
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[AC_DEFINE(HAVE_SHL_LOAD, 1, |
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[Define if you have the shl_load function.]) |
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LIBADD_DL="$LIBADD_DL -ldld"]) |
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]) |
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AC_CHECK_LIB(dld, dld_link, [AC_DEFINE(HAVE_DLD, 1, |
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[Define if you have the GNU dld library.])dnl |
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test "x$ac_cv_lib_dld_shl_load" = yes || LIBADD_DL="$LIBADD_DL -ldld"]) |
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AC_SUBST(LIBADD_DL) |
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if test "x$ac_cv_func_dlopen" = xyes || test "x$ac_cv_lib_dl_dlopen" = xyes; then |
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LIBS_SAVE="$LIBS" |
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LIBS="$LIBS $LIBADD_DL" |
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AC_CHECK_FUNCS(dlerror) |
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LIBS="$LIBS_SAVE" |
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fi |
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])# AC_LTDL_DLLIB |
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# AC_LTDL_SYMBOL_USCORE |
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# --------------------- |
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AC_DEFUN(AC_LTDL_SYMBOL_USCORE, |
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[dnl does the compiler prefix global symbols with an underscore? |
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AC_REQUIRE([AC_LIBTOOL_SYS_GLOBAL_SYMBOL_PIPE])dnl |
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AC_MSG_CHECKING([for _ prefix in compiled symbols]) |
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AC_CACHE_VAL(ac_cv_sys_symbol_underscore, |
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[ac_cv_sys_symbol_underscore=no |
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cat > conftest.$ac_ext <<EOF |
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void nm_test_func(){} |
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int main(){nm_test_func;return 0;} |
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EOF |
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if AC_TRY_EVAL(ac_compile); then |
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# Now try to grab the symbols. |
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ac_nlist=conftest.nm |
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if AC_TRY_EVAL(NM conftest.$ac_objext \| $global_symbol_pipe \> $ac_nlist) && test -s "$ac_nlist"; then |
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# See whether the symbols have a leading underscore. |
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if egrep '^. _nm_test_func' "$ac_nlist" >/dev/null; then |
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ac_cv_sys_symbol_underscore=yes |
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else |
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if egrep '^. nm_test_func ' "$ac_nlist" >/dev/null; then |
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: |
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else |
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echo "configure: cannot find nm_test_func in $ac_nlist" >&AC_FD_CC |
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fi |
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fi |
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else |
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echo "configure: cannot run $global_symbol_pipe" >&AC_FD_CC |
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fi |
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else |
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echo "configure: failed program was:" >&AC_FD_CC |
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cat conftest.c >&AC_FD_CC |
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fi |
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rm -rf conftest* |
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]) |
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AC_MSG_RESULT($ac_cv_sys_symbol_underscore) |
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])# AC_LTDL_SYMBOL_USCORE |
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# AC_LTDL_DLSYM_USCORE |
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# -------------------- |
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AC_DEFUN(AC_LTDL_DLSYM_USCORE, |
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[AC_REQUIRE([AC_LTDL_SYMBOL_USCORE])dnl |
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if test x"$ac_cv_sys_symbol_underscore" = xyes; then |
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if test x"$ac_cv_func_dlopen" = xyes || |
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test x"$ac_cv_lib_dl_dlopen" = xyes ; then |
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AC_CACHE_CHECK([whether we have to add an underscore for dlsym], |
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libltdl_cv_need_uscore, [dnl |
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libltdl_cv_need_uscore=unknown |
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save_LIBS="$LIBS" |
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LIBS="$LIBS $LIBADD_DL" |
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_LT_AC_TRY_DLOPEN_SELF( |
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libltdl_cv_need_uscore=no, libltdl_cv_need_uscore=yes, |
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[], libltdl_cv_need_uscore=cross) |
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LIBS="$save_LIBS" |
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]) |
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fi |
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fi |
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if test x"$libltdl_cv_need_uscore" = xyes; then |
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AC_DEFINE(NEED_USCORE, 1, |
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[Define if dlsym() requires a leading underscode in symbol names. ]) |
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fi |
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])# AC_LTDL_DLSYM_USCORE |
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# AC_CHECK_TYPES(TYPES, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND], |
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# [INCLUDES]) |
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# --------------------------------------------------------------- |
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# This macro did not exist in Autoconf 2.13, which we do still support |
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ifdef([AC_CHECK_TYPES], [], |
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[define([AC_CHECK_TYPES], |
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[AC_CACHE_CHECK([for $1], ac_Type, |
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[AC_TRY_LINK([$4], |
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[if (($1 *) 0) |
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return 0; |
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if (sizeof ($1)) |
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return 0;], |
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[ac_Type=yes], |
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[ac_Type=no])]) |
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if test "x$ac_Type" = xyes; then |
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ifelse([$2], [], [:], [$2]) |
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else |
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ifelse([$3], [], [:], [$3]) |
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fi]) |
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])# AC_CHECK_TYPES |
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# AC_LTDL_FUNC_ARGZ |
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# ----------------- |
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AC_DEFUN([AC_LTDL_FUNC_ARGZ], |
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[AC_CHECK_HEADERS([argz.h]) |
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AC_CHECK_TYPES([error_t], |
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[], |
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[AC_DEFINE([error_t], [int], |
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[Define to a type to use for \`error_t' if it is not otherwise available.])], |
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[#if HAVE_ARGZ_H |
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# include <argz.h> |
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#endif]) |
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AC_CHECK_FUNCS([argz_append argz_create_sep argz_insert argz_next argz_stringify]) |
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])# AC_LTDL_FUNC_ARGZ
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