diff options
Diffstat (limited to 'ltdl.m4')
| -rw-r--r-- | ltdl.m4 | 519 |
1 files changed, 519 insertions, 0 deletions
@@ -0,0 +1,519 @@ +## ltdl.m4 - Configure ltdl for the target system. -*-Shell-script-*- +## Copyright (C) 1999, 2000, 2001 Free Software Foundation, Inc. +## +## This program is free software; you can redistribute it and/or modify +## it under the terms of the GNU General Public License as published by +## the Free Software Foundation; either version 2 of the License, or +## (at your option) any later version. +## +## This program is distributed in the hope that it will be useful, but +## WITHOUT ANY WARRANTY; without even the implied warranty of +## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +## General Public License for more details. +## +## You should have received a copy of the GNU General Public License +## along with this program; if not, write to the Free Software +## Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. +## +## As a special exception to the GNU General Public License, if you +## distribute this file as part of a program that contains a +## configuration script generated by Autoconf, you may include it under +## the same distribution terms that you use for the rest of that program. + +# serial 1 AC_LIB_LTDL + +AC_DEFUN([AC_LIB_LTDL], +[AC_PREREQ(2.13)dnl +AC_REQUIRE([AC_PROG_CC])dnl +AC_REQUIRE([AC_C_CONST])dnl +AC_REQUIRE([AC_C_INLINE])dnl +AC_REQUIRE([AC_LIB_LTDL_COMMON])dnl +]) + +AC_DEFUN([KDE_LIB_LTDL], +[AC_PREREQ(2.13)dnl +AC_REQUIRE([AC_PROG_CC])dnl +AC_REQUIRE([AC_LIB_LTDL_COMMON])dnl +]) + +AC_DEFUN([AC_LIB_LTDL_COMMON], +[dnl +dnl AC_LIB_LTDL must perform all the checks necessary for compilation +dnl of the ltdl objects -- including compiler checks (above) and header +dnl checks (below). +AC_REQUIRE([AC_HEADER_STDC])dnl + +AC_CHECK_HEADERS(malloc.h memory.h stdlib.h stdio.h ctype.h dlfcn.h dl.h dld.h) +AC_CHECK_HEADERS(string.h strings.h, break) +AC_CHECK_FUNCS(strchr index, break) +AC_CHECK_FUNCS(strrchr rindex, break) +AC_CHECK_FUNCS(memcpy bcopy, break) +AC_CHECK_FUNCS(strcmp) + +AC_REQUIRE([AC_LTDL_ENABLE_INSTALL])dnl +AC_REQUIRE([AC_LTDL_SHLIBEXT])dnl +AC_REQUIRE([AC_LTDL_SHLIBPATH])dnl +AC_REQUIRE([AC_LTDL_SYSSEARCHPATH])dnl +AC_REQUIRE([AC_LTDL_OBJDIR])dnl +AC_REQUIRE([AC_LTDL_DLPREOPEN])dnl +AC_REQUIRE([AC_LTDL_DLLIB])dnl +AC_REQUIRE([AC_LTDL_SYMBOL_USCORE])dnl +AC_REQUIRE([AC_LTDL_DLSYM_USCORE])dnl +AC_REQUIRE([AC_LTDL_SYS_DLOPEN_DEPLIBS])dnl +]) + +AC_DEFUN([AC_LTDL_ENABLE_INSTALL], +[AC_ARG_ENABLE(ltdl-install, +AC_HELP_STRING([--enable-ltdl-install],[install libltdl])) + +AM_CONDITIONAL(INSTALL_LTDL, test x"${enable_ltdl_install-no}" != xno) +AM_CONDITIONAL(CONVENIENCE_LTDL, test x"${enable_ltdl_convenience-no}" != xno) +])]) + + +AC_DEFUN([AC_LTDL_SNARF_CONFIG], +[# Read the libtool configuration +rm -f conftest +./libtool --config > conftest +. ./conftest +rm -f conftest +]) + +# AC_LTDL_SYS_DLOPEN_DEPLIBS +# -------------------------- +AC_DEFUN([AC_LTDL_SYS_DLOPEN_DEPLIBS], +[AC_REQUIRE([AC_CANONICAL_HOST]) +AC_CACHE_CHECK([whether deplibs are loaded by dlopen], + libltdl_cv_sys_dlopen_deplibs, [dnl + # PORTME does your system automatically load deplibs for dlopen()? + libltdl_cv_sys_dlopen_deplibs=unknown + case "$host_os" in + cygwin*) + libltdl_cv_sys_dlopen_deplibs=yes + ;; + darwin*) + libltdl_cv_sys_dlopen_deplibs=yes + ;; + linux*) + libltdl_cv_sys_dlopen_deplibs=yes + ;; + netbsd*|openbsd*|freebsd*|dragonfly*) + libltdl_cv_sys_dlopen_deplibs=yes + ;; + solaris*) + libltdl_cv_sys_dlopen_deplibs=yes + ;; + hpux*|irix*) + libltdl_cv_sys_dlopen_deplibs=yes + ;; + osf*) + libltdl_cv_sys_dlopen_deplibs=yes + ;; + esac +]) +if test "$libltdl_cv_sys_dlopen_deplibs" != yes; then + AC_DEFINE(LTDL_DLOPEN_DEPLIBS, 1, + [Define if the OS needs help to load dependent libraries for dlopen(). ]) +fi +])# AC_LTDL_SYS_DLOPEN_DEPLIBS + +AC_DEFUN([AC_LTDL_SHLIBEXT], +[AC_REQUIRE([AC_LTDL_SNARF_CONFIG])dnl +AC_CACHE_CHECK([which extension is used for shared libraries], + libltdl_cv_shlibext, [dnl +( + last= + case "$host_os" in + cygwin* | mingw*) + last=".dll" + ;; + *) + for spec in $library_names_spec; do + last="$spec" + done + ;; + esac +changequote(, ) + echo "$last" | sed 's/\[.*\]//;s/^[^.]*//;s/\$.*$//;s/\.$//' > conftest +changequote([, ]) +) +libltdl_cv_shlibext=`cat conftest` +rm -f conftest +]) +if test -n "$libltdl_cv_shlibext"; then + AC_DEFINE_UNQUOTED(LTDL_SHLIB_EXT, "$libltdl_cv_shlibext", + [Define to the extension used for shared libraries, say, ".so". ]) +fi +]) + +AC_DEFUN([AC_LTDL_SHLIBPATH], +[AC_REQUIRE([AC_LTDL_SNARF_CONFIG])dnl +AC_CACHE_CHECK([which variable specifies run-time library path], + libltdl_cv_shlibpath_var, [libltdl_cv_shlibpath_var="$shlibpath_var"]) +if test -n "$libltdl_cv_shlibpath_var"; then + AC_DEFINE_UNQUOTED(LTDL_SHLIBPATH_VAR, "$libltdl_cv_shlibpath_var", + [Define to the name of the environment variable that determines the dynamic library search path. ]) +fi +]) + +AC_DEFUN([AC_LTDL_SYSSEARCHPATH], +[AC_REQUIRE([AC_LTDL_SNARF_CONFIG])dnl +AC_CACHE_CHECK([for the default library search path], + libltdl_cv_sys_search_path, [libltdl_cv_sys_search_path="$sys_lib_dlsearch_path_spec"]) +if test -n "$libltdl_cv_sys_search_path"; then + case "$host" in + *-*-mingw*) pathsep=";" ;; + *) pathsep=":" ;; + esac + sys_search_path= + for dir in $libltdl_cv_sys_search_path; do + if test -z "$sys_search_path"; then + sys_search_path="$dir" + else + sys_search_path="$sys_search_path$pathsep$dir" + fi + done + AC_DEFINE_UNQUOTED(LTDL_SYSSEARCHPATH, "$sys_search_path", + [Define to the system default library search path. ]) +fi +]) + +AC_DEFUN([AC_LTDL_OBJDIR], +[AC_CACHE_CHECK([for objdir], + libltdl_cv_objdir, [libltdl_cv_objdir="$objdir" +if test -n "$objdir"; then + : +else + rm -f .libs 2>/dev/null + mkdir .libs 2>/dev/null + if test -d .libs; then + libltdl_cv_objdir=.libs + else + # MS-DOS does not allow filenames that begin with a dot. + libltdl_cv_objdir=_libs + fi +rmdir .libs 2>/dev/null +fi]) +AC_DEFINE_UNQUOTED(LTDL_OBJDIR, "$libltdl_cv_objdir/", + [Define to the sub-directory in which libtool stores uninstalled libraries. ]) +]) + +AC_DEFUN([AC_LTDL_DLPREOPEN], +[AC_REQUIRE([AC_LTDL_GLOBAL_SYMBOL_PIPE])dnl +AC_CACHE_CHECK([whether libtool supports -dlopen/-dlpreopen], + libltdl_cv_preloaded_symbols, [dnl + if test -n "$global_symbol_pipe"; then + libltdl_cv_preloaded_symbols=yes + else + libltdl_cv_preloaded_symbols=no + fi +]) +if test x"$libltdl_cv_preloaded_symbols" = x"yes"; then + AC_DEFINE(HAVE_PRELOADED_SYMBOLS, 1, + [Define if libtool can extract symbol lists from object files. ]) +fi +]) + +AC_DEFUN([AC_LTDL_DLLIB], +[LIBADD_DL= +AC_CHECK_LIB(dl, dlopen, [AC_DEFINE(HAVE_LIBDL, 1, + [Define if you have the libdl library or equivalent. ]) LIBADD_DL="-ldl"], +[AC_CHECK_FUNC(dlopen, [AC_DEFINE(HAVE_LIBDL, 1, + [Define if you have the libdl library or equivalent.])], +[AC_CHECK_LIB(svld, dlopen, [AC_DEFINE(HAVE_LIBDL, 1, + [Define if you have the libdl library or equivalent.]) LIBADD_DL="-lsvld"] +)])]) +AC_CHECK_FUNC(shl_load, [AC_DEFINE(HAVE_SHL_LOAD, 1, + [Define if you have the shl_load function.])], +[AC_CHECK_LIB(dld, shl_load, + [AC_DEFINE(HAVE_SHL_LOAD, 1, + [Define if you have the shl_load function.]) + LIBADD_DL="$LIBADD_DL -ldld"]) +]) +AC_CHECK_LIB(dld, dld_link, [AC_DEFINE(HAVE_DLD, 1, + [Define if you have the GNU dld library.])dnl +test "x$ac_cv_lib_dld_shl_load" = yes || LIBADD_DL="$LIBADD_DL -ldld"]) +AC_SUBST(LIBADD_DL) + +if test "x$ac_cv_func_dlopen" = xyes || test "x$ac_cv_lib_dl_dlopen" = xyes; then + LIBS_SAVE="$LIBS" + LIBS="$LIBS $LIBADD_DL" + AC_CHECK_FUNCS(dlerror) + LIBS="$LIBS_SAVE" +fi +]) + +AC_DEFUN([AC_LTDL_GLOBAL_SYMBOL_PIPE], +[dnl Check for command to grab the raw symbol name followed +dnl by C symbol name from nm. +AC_REQUIRE([AC_CANONICAL_HOST])dnl +AC_REQUIRE([AC_PROG_NM])dnl +# Check for command to grab the raw symbol name followed by C symbol from nm. +AC_MSG_CHECKING([command to parse $NM output]) +AC_CACHE_VAL(ac_cv_sys_global_symbol_pipe, +[# These are sane defaults that work on at least a few old systems. +# {They come from Ultrix. What could be older than Ultrix?!! ;)} + +changequote(,)dnl +# Character class describing NM global symbol codes. +ac_symcode='[BCDEGRST]' + +# Regexp to match symbols that can be accessed directly from C. +ac_sympat='\([_A-Za-z][_A-Za-z0-9]*\)' + +# Transform the above into a raw symbol and a C symbol. +ac_symxfrm='\1 \2\3 \3' + +# Transform an extracted symbol line into a proper C declaration +ac_global_symbol_to_cdecl="sed -n -e 's/^. .* \(.*\)$/extern char \1;/p'" + +# Define system-specific variables. +case "$host_os" in +aix*) + ac_symcode='[BCDT]' + ;; +cygwin* | mingw*) + ac_symcode='[ABCDGISTW]' + ;; +hpux*) + ac_global_symbol_to_cdecl="sed -n -e 's/^T .* \(.*\)$/extern char \1();/p' -e 's/^. .* \(.*\)$/extern char \1;/p'" + ;; +irix*) + ac_symcode='[BCDEGRST]' + ;; +solaris*) + ac_symcode='[BDT]' + ;; +esac + +# If we're using GNU nm, then use its standard symbol codes. +if $NM -V 2>&1 | egrep '(GNU|with BFD)' > /dev/null; then + ac_symcode='[ABCDGISTW]' +fi +changequote([,])dnl + +# Try without a prefix undercore, then with it. +for ac_symprfx in "" "_"; do + + ac_cv_sys_global_symbol_pipe="sed -n -e 's/^.*[ ]\($ac_symcode\)[ ][ ]*\($ac_symprfx\)$ac_sympat$/$ac_symxfrm/p'" + + # Check to see that the pipe works correctly. + ac_pipe_works=no + rm -f conftest.$ac_ext + cat > conftest.$ac_ext <<EOF +#ifdef __cplusplus +extern "C" { +#endif +char nm_test_var; +void nm_test_func(){} +#ifdef __cplusplus +} +#endif +int main(){nm_test_var='a';nm_test_func;return 0;} +EOF + + if AC_TRY_EVAL(ac_compile); then + # Now try to grab the symbols. + ac_nlist=conftest.nm + + if AC_TRY_EVAL(NM conftest.$ac_objext \| $ac_cv_sys_global_symbol_pipe \> $ac_nlist) && test -s "$ac_nlist"; then + + # Try sorting and uniquifying the output. + if sort "$ac_nlist" | uniq > "$ac_nlist"T; then + mv -f "$ac_nlist"T "$ac_nlist" + else + rm -f "$ac_nlist"T + fi + + # Make sure that we snagged all the symbols we need. + if egrep ' nm_test_var$' "$ac_nlist" >/dev/null; then + if egrep ' nm_test_func$' "$ac_nlist" >/dev/null; then + cat <<EOF > conftest.$ac_ext +#ifdef __cplusplus +extern "C" { +#endif + +EOF + # Now generate the symbol file. + eval "$ac_global_symbol_to_cdecl"' < "$ac_nlist" >> conftest.$ac_ext' + + cat <<EOF >> conftest.$ac_ext +#if defined (__STDC__) && __STDC__ +# define lt_ptr_t void * +#else +# define lt_ptr_t char * +# define const +#endif + +/* The mapping between symbol names and symbols. */ +const struct { + const char *name; + lt_ptr_t address; +} +changequote(,)dnl +lt_preloaded_symbols[] = +changequote([,])dnl +{ +EOF + sed 's/^. \(.*\) \(.*\)$/ {"\2", (lt_ptr_t) \&\2},/' < "$ac_nlist" >> conftest.$ac_ext + cat <<\EOF >> conftest.$ac_ext + {0, (lt_ptr_t) 0} +}; + +#ifdef __cplusplus +} +#endif +EOF + # Now try linking the two files. + mv conftest.$ac_objext conftstm.$ac_objext + ac_save_LIBS="$LIBS" + ac_save_CFLAGS="$CFLAGS" + LIBS="conftstm.$ac_objext" + CFLAGS="$CFLAGS$no_builtin_flag" + if AC_TRY_EVAL(ac_link) && test -s conftest; then + ac_pipe_works=yes + else + echo "configure: failed program was:" >&AC_FD_CC + cat conftest.$ac_ext >&AC_FD_CC + fi + LIBS="$ac_save_LIBS" + CFLAGS="$ac_save_CFLAGS" + else + echo "cannot find nm_test_func in $ac_nlist" >&AC_FD_CC + fi + else + echo "cannot find nm_test_var in $ac_nlist" >&AC_FD_CC + fi + else + echo "cannot run $ac_cv_sys_global_symbol_pipe" >&AC_FD_CC + fi + else + echo "$progname: failed program was:" >&AC_FD_CC + cat conftest.$ac_ext >&AC_FD_CC + fi + rm -rf conftest* conftst* + + # Do not use the global_symbol_pipe unless it works. + if test "$ac_pipe_works" = yes; then + if test x"$ac_symprfx" = x"_"; then + ac_cv_sys_symbol_underscore=yes + else + ac_cv_sys_symbol_underscore=no + fi + break + else + ac_cv_sys_global_symbol_pipe= + fi +done +]) + +ac_result=yes +if test -z "$ac_cv_sys_global_symbol_pipe"; then + ac_result=no +fi +AC_MSG_RESULT($ac_result) +]) + +AC_DEFUN([AC_LTDL_SYMBOL_USCORE], +[dnl does the compiler prefix global symbols with an underscore? +AC_REQUIRE([AC_LTDL_GLOBAL_SYMBOL_PIPE])dnl +AC_MSG_CHECKING([for _ prefix in compiled symbols]) +AC_CACHE_VAL(ac_cv_sys_symbol_underscore, +[ac_cv_sys_symbol_underscore=no +cat > conftest.$ac_ext <<EOF +void nm_test_func(){} +int main(){nm_test_func;return 0;} +EOF +if AC_TRY_EVAL(ac_compile); then + # Now try to grab the symbols. + ac_nlist=conftest.nm + if AC_TRY_EVAL(NM conftest.$ac_objext \| $ac_cv_sys_global_symbol_pipe \> $ac_nlist) && test -s "$ac_nlist"; then + # See whether the symbols have a leading underscore. + if egrep '^. _nm_test_func' "$ac_nlist" >/dev/null; then + ac_cv_sys_symbol_underscore=yes + else + if egrep '^. nm_test_func ' "$ac_nlist" >/dev/null; then + : + else + echo "configure: cannot find nm_test_func in $ac_nlist" >&AC_FD_CC + fi + fi + else + echo "configure: cannot run $ac_cv_sys_global_symbol_pipe" >&AC_FD_CC + fi +else + echo "configure: failed program was:" >&AC_FD_CC + cat conftest.$ac_ext >&AC_FD_CC +fi +rm -rf conftest* +]) +AC_MSG_RESULT($ac_cv_sys_symbol_underscore) +]) + +AC_DEFUN([AC_LTDL_DLSYM_USCORE], +[AC_REQUIRE([AC_LTDL_SYMBOL_USCORE])dnl +if test x"$ac_cv_sys_symbol_underscore" = xyes; then + if test x"$ac_cv_func_dlopen" = xyes || + test x"$ac_cv_lib_dl_dlopen" = xyes ; then + AC_CACHE_CHECK([whether we have to add an underscore for dlsym], + libltdl_cv_need_uscore, [dnl + AC_TRY_RUN([ +#if HAVE_DLFCN_H +#include <dlfcn.h> +#endif + +#include <stdio.h> + +#ifdef RTLD_GLOBAL +# define LTDL_GLOBAL RTLD_GLOBAL +#else +# ifdef DL_GLOBAL +# define LTDL_GLOBAL DL_GLOBAL +# else +# define LTDL_GLOBAL 0 +# endif +#endif + +/* We may have to define LTDL_LAZY_OR_NOW in the command line if we + find out it does not work in some platform. */ +#ifndef LTDL_LAZY_OR_NOW +# ifdef RTLD_LAZY +# define LTDL_LAZY_OR_NOW RTLD_LAZY +# else +# ifdef DL_LAZY +# define LTDL_LAZY_OR_NOW DL_LAZY +# else +# ifdef RTLD_NOW +# define LTDL_LAZY_OR_NOW RTLD_NOW +# else +# ifdef DL_NOW +# define LTDL_LAZY_OR_NOW DL_NOW +# else +# define LTDL_LAZY_OR_NOW 0 +# endif +# endif +# endif +# endif +#endif + +void fnord() { int i=42;} +int main() { + void *self, *ptr1, *ptr2; self=dlopen(0,LTDL_GLOBAL|LTDL_LAZY_OR_NOW); + if(self) { ptr1=dlsym(self,"fnord"); ptr2=dlsym(self,"_fnord"); + if(ptr1 && !ptr2) { dlclose(self); exit(0); } } exit(1); } +], libltdl_cv_need_uscore=no, libltdl_cv_need_uscore=yes, + libltdl_cv_need_uscore=cross +)]) + fi +fi + +case "$host_os" in + cygwin* | mingw*) + libltdl_cv_need_uscore=no + ;; +esac +if test x"$libltdl_cv_need_uscore" = xyes; then + AC_DEFINE(NEED_USCORE, 1, + [Define if dlsym() requires a leading underscode in symbol names. ]) +fi +]) |