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Diffstat (limited to 'm4/ltdl.m4')
| -rw-r--r-- | m4/ltdl.m4 | 516 |
1 files changed, 516 insertions, 0 deletions
diff --git a/m4/ltdl.m4 b/m4/ltdl.m4 new file mode 100644 index 00000000..e2d277ff --- /dev/null +++ b/m4/ltdl.m4 @@ -0,0 +1,516 @@ +## ltdl.m4 - Configure ltdl for the target system. -*-Autoconf-*- +## Copyright (C) 1999-2004 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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 6 AC_LIB_LTDL + +# AC_WITH_LTDL([DIRECTORY]) +# ------------------------- +# Clients of libltdl can use this macro to allow the installer to +# choose between a shipped copy of the ltdl sources or a preinstalled +# version of the library. +AC_DEFUN([AC_WITH_LTDL], +[AC_ARG_WITH([included_ltdl], + [AC_HELP_STRING([--with-included-ltdl], + [use the GNU ltdl sources included here])]) + +if test "x$with_included_ltdl" != xyes; then + # We are not being forced to use the included libltdl sources, so + # decide whether there is a useful installed version we can use. + AC_CHECK_HEADER([ltdl.h], + [AC_CHECK_LIB([ltdl], [lt_dlcaller_register], + [with_included_ltdl=no], + [with_included_ltdl=yes])], + + [], + [AC_INCLUDES_DEFAULT] + ) +fi + +if test "x$enable_ltdl_install" != xyes; then + # If the user did not specify an installable libltdl, then default + # to a convenience lib. + AC_LIBLTDL_CONVENIENCE +fi + +if test "x$with_included_ltdl" = xno; then + # If the included ltdl is not to be used. then Use the + # preinstalled libltdl we found. + AC_DEFINE([HAVE_LTDL], 1, + [Define this if a modern libltdl is already installed]) + LIBLTDL=-lltdl +fi + +# Report our decision... +AC_MSG_CHECKING([whether to use included libltdl]) +AC_MSG_RESULT([$with_included_ltdl]) + +AC_CONFIG_SUBDIRS(m4_if($#, 1, [$1], [libltdl])) +])# AC_WITH_LTDL + + +# AC_LIBLTDL_CONVENIENCE([DIRECTORY]) +# ----------------------------------- +# sets LIBLTDL to the link flags for the libltdl convenience library and +# LTDLINCL to the include flags for the libltdl header and adds +# --enable-ltdl-convenience to the configure arguments. Note that LIBLTDL +# and LTDLINCL are not AC_SUBSTed, nor is AC_CONFIG_SUBDIRS called. If +# DIRECTORY is not provided, it is assumed to be `libltdl'. LIBLTDL will +# be prefixed with '${top_builddir}/' and LTDLINCL will be prefixed with +# '${top_srcdir}/' (note the single quotes!). If your package is not +# flat and you're not using automake, define top_builddir and +# top_srcdir appropriately in the Makefiles. +AC_DEFUN([AC_LIBLTDL_CONVENIENCE], +[case $enable_ltdl_convenience in + no) AC_MSG_ERROR([this package needs a convenience libltdl]) ;; + "") enable_ltdl_convenience=yes + ac_configure_args="$ac_configure_args --enable-ltdl-convenience" ;; + esac +LIBLTDL='${top_builddir}/'m4_if($#, 1, [$1], ['libltdl'])/libltdlc.la +LTDLINCL='-I${top_srcdir}/'m4_if($#, 1, [$1], ['libltdl']) + +AC_SUBST([LIBLTDL]) +AC_SUBST([LTDLINCL]) + +# For backwards non-gettext consistent compatibility... +INCLTDL="$LTDLINCL" +AC_SUBST([INCLTDL]) +])# AC_LIBLTDL_CONVENIENCE + + +# AC_LIBLTDL_INSTALLABLE([DIRECTORY]) +# ----------------------------------- +# sets LIBLTDL to the link flags for the libltdl installable library and +# LTDLINCL to the include flags for the libltdl header and adds +# --enable-ltdl-install to the configure arguments. Note that LIBLTDL +# and LTDLINCL are not AC_SUBSTed, nor is AC_CONFIG_SUBDIRS called. If +# DIRECTORY is not provided and an installed libltdl is not found, it is +# assumed to be `libltdl'. LIBLTDL will be prefixed with '${top_builddir}/' +# and LTDLINCL will be prefixed with '${top_srcdir}/' (note the single +# quotes!). If your package is not flat and you're not using automake, +# define top_builddir and top_srcdir appropriately in the Makefiles. +# In the future, this macro may have to be called after LT_INIT. +AC_DEFUN([AC_LIBLTDL_INSTALLABLE], +[AC_CHECK_LIB(ltdl, lt_dlinit, + [test x"$enable_ltdl_install" != xyes && enable_ltdl_install=no], + [if test x"$enable_ltdl_install" = xno; then + AC_MSG_WARN([libltdl not installed, but installation disabled]) + else + enable_ltdl_install=yes + fi + ]) +if test x"$enable_ltdl_install" = x"yes"; then + ac_configure_args="$ac_configure_args --enable-ltdl-install" + LIBLTDL='${top_builddir}/'m4_if($#, 1, [$1], ['libltdl'])/libltdl.la + LTDLINCL='-I${top_srcdir}/'m4_if($#, 1, [$1], ['libltdl']) +else + ac_configure_args="$ac_configure_args --enable-ltdl-install=no" + LIBLTDL="-lltdl" + LTDLINCL= +fi + +AC_SUBST([LIBLTDL]) +AC_SUBST([LTDLINCL]) + +# For backwards non-gettext consistent compatibility... +INCLTDL="$LTDLINCL" +AC_SUBST([INCLTDL]) +])# AC_LIBLTDL_INSTALLABLE + + +# AC_LIB_LTDL +# ----------- +# Perform all the checks necessary for compilation of the ltdl objects +# -- including compiler checks and header checks. +AC_DEFUN([AC_LIB_LTDL], +[AC_REQUIRE([AC_PROG_CC]) +AC_REQUIRE([AC_C_CONST]) +AC_REQUIRE([AC_HEADER_STDC]) +AC_REQUIRE([AC_HEADER_DIRENT]) +AC_REQUIRE([_LT_AC_CHECK_DLFCN]) +AC_REQUIRE([AC_LTDL_ENABLE_INSTALL]) +AC_REQUIRE([AC_LTDL_SHLIBEXT]) +AC_REQUIRE([AC_LTDL_SHLIBPATH]) +AC_REQUIRE([AC_LTDL_SYSSEARCHPATH]) +AC_REQUIRE([AC_LTDL_OBJDIR]) +AC_REQUIRE([AC_LTDL_DLPREOPEN]) +AC_REQUIRE([AC_LTDL_DLLIB]) +AC_REQUIRE([AC_LTDL_SYMBOL_USCORE]) +AC_REQUIRE([AC_LTDL_DLSYM_USCORE]) +AC_REQUIRE([AC_LTDL_SYS_DLOPEN_DEPLIBS]) +AC_REQUIRE([gl_FUNC_ARGZ]) + +# In order that ltdl.c can compile, run AC_CONFIG_HEADERS for the user +# if they did not call it themself. This is so that ltdl.h can pick up +# the parent projects config.h file, The first file in AC_CONFIG_HEADERS +# must contain the definitions required by ltdl.c. +m4_ifset([AC_LIST_HEADERS], + [CONFIG_H=`echo "AC_LIST_HEADERS" | $SED 's,^[[ ]]*,,;s,[[ :]].*$,,'`], + [CONFIG_H=config.h;AC_CONFIG_HEADERS([config.h])]) +AC_SUBST([CONFIG_H]) + +AC_CHECK_HEADERS([memory.h unistd.h dl.h sys/dl.h dld.h mach-o/dyld.h], + [], [], [AC_INCLUDES_DEFAULT]) +AC_CHECK_HEADERS([string.h strings.h], [break], [], [AC_INCLUDES_DEFAULT]) + +AC_CHECK_FUNCS([closedir opendir readdir], [], [AC_LIBOBJ([lt__dirent])]) +])# AC_LIB_LTDL + + +# AC_LTDL_ENABLE_INSTALL +# ---------------------- +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_LTDL_ENABLE_INSTALL + + +# 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], + [# PORTME does your system automatically load deplibs for dlopen? + # or its logical equivalent (e.g. shl_load for HP-UX < 11) + # For now, we just catch OSes we know something about -- in the + # future, we'll try test this programmatically. + libltdl_cv_sys_dlopen_deplibs=unknown + case "$host_os" in + aix3*|aix4.1.*|aix4.2.*) + # Unknown whether this is true for these versions of AIX, but + # we want this `case' here to explicitly catch those versions. + libltdl_cv_sys_dlopen_deplibs=unknown + ;; + aix[[45]]*) + libltdl_cv_sys_dlopen_deplibs=yes + ;; + darwin*) + # Assuming the user has installed a libdl from somewhere, this is true + # If you are looking for one http://www.opendarwin.org/projects/dlcompat + libltdl_cv_sys_dlopen_deplibs=yes + ;; + gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu) + # GNU and its variants, using gnu ld.so (Glibc) + libltdl_cv_sys_dlopen_deplibs=yes + ;; + hpux10*|hpux11*) + libltdl_cv_sys_dlopen_deplibs=yes + ;; + irix[[12345]]*|irix6.[[01]]*) + # Catch all versions of IRIX before 6.2, and indicate that we don't + # know how it worked for any of those versions. + libltdl_cv_sys_dlopen_deplibs=unknown + ;; + irix*) + # The case above catches anything before 6.2, and it's known that + # at 6.2 and later dlopen does load deplibs. + libltdl_cv_sys_dlopen_deplibs=yes + ;; + netbsd*) + libltdl_cv_sys_dlopen_deplibs=yes + ;; + openbsd*) + libltdl_cv_sys_dlopen_deplibs=yes + ;; + osf[[1234]]*) + # dlopen did load deplibs (at least at 4.x), but until the 5.x series, + # it did *not* use an RPATH in a shared library to find objects the + # library depends on, so we explictly say `no'. + libltdl_cv_sys_dlopen_deplibs=no + ;; + osf5.0|osf5.0a|osf5.1) + # dlopen *does* load deplibs and with the right loader patch applied + # it even uses RPATH in a shared library to search for shared objects + # that the library depends on, but there's no easy way to know if that + # patch is installed. Since this is the case, all we can really + # say is unknown -- it depends on the patch being installed. If + # it is, this changes to `yes'. Without it, it would be `no'. + libltdl_cv_sys_dlopen_deplibs=unknown + ;; + osf*) + # the two cases above should catch all versions of osf <= 5.1. Read + # the comments above for what we know about them. + # At > 5.1, deplibs are loaded *and* any RPATH in a shared library + # is used to find them so we can finally say `yes'. + libltdl_cv_sys_dlopen_deplibs=yes + ;; + qnx*) + libltdl_cv_sys_dlopen_deplibs=yes + ;; + solaris*) + 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_LTDL_SHLIBEXT +# ---------------- +AC_DEFUN([AC_LTDL_SHLIBEXT], +[AC_REQUIRE([AC_LIBTOOL_SYS_DYNAMIC_LINKER]) +AC_CACHE_CHECK([which extension is used for loadable modules], + [libltdl_cv_shlibext], +[ +module=yes +eval libltdl_cv_shlibext=$shrext_cmds + ]) +if test -n "$libltdl_cv_shlibext"; then + AC_DEFINE_UNQUOTED(LTDL_SHLIB_EXT, "$libltdl_cv_shlibext", + [Define to the extension used for shared libraries, say, ".so".]) +fi +])# AC_LTDL_SHLIBEXT + + +# AC_LTDL_SHLIBPATH +# ----------------- +AC_DEFUN([AC_LTDL_SHLIBPATH], +[AC_REQUIRE([AC_LIBTOOL_SYS_DYNAMIC_LINKER]) +AC_CACHE_CHECK([which variable specifies run-time library path], + [libltdl_cv_shlibpath_var], [libltdl_cv_shlibpath_var="$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_LTDL_SHLIBPATH + + +# AC_LTDL_SYSSEARCHPATH +# --------------------- +AC_DEFUN([AC_LTDL_SYSSEARCHPATH], +[AC_REQUIRE([AC_LIBTOOL_SYS_DYNAMIC_LINKER]) +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 + 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$PATH_SEPARATOR$dir" + fi + done + AC_DEFINE_UNQUOTED(LTDL_SYSSEARCHPATH, "$sys_search_path", + [Define to the system default library search path.]) +fi +])# AC_LTDL_SYSSEARCHPATH + + +# AC_LTDL_OBJDIR +# -------------- +AC_DEFUN([AC_LTDL_OBJDIR], +[AC_CACHE_CHECK([for objdir], + [libltdl_cv_objdir], + [libltdl_cv_objdir="$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_LTDL_OBJDIR + + +# AC_LTDL_DLPREOPEN +# ----------------- +AC_DEFUN([AC_LTDL_DLPREOPEN], +[AC_REQUIRE([AC_LIBTOOL_SYS_GLOBAL_SYMBOL_PIPE]) +AC_CACHE_CHECK([whether libtool supports -dlopen/-dlpreopen], + [libltdl_cv_preloaded_symbols], + [if test -n "$lt_cv_sys_global_symbol_pipe"; then + libltdl_cv_preloaded_symbols=yes + else + libltdl_cv_preloaded_symbols=no + fi + ]) +if test x"$libltdl_cv_preloaded_symbols" = xyes; then + AC_DEFINE(HAVE_PRELOADED_SYMBOLS, 1, + [Define if libtool can extract symbol lists from object files.]) +fi +])# AC_LTDL_DLPREOPEN + + +# AC_LTDL_DLLIB +# ------------- +AC_DEFUN([AC_LTDL_DLLIB], +[m4_pattern_allow([^LT_DLLOADERS$]) +LT_DLLOADERS= +AC_SUBST([LT_DLLOADERS]) + +AC_LANG_PUSH([C]) + +LIBADD_DLOPEN= +AC_CHECK_LIB([dl], [dlopen], + [AC_DEFINE([HAVE_LIBDL], [1], + [Define if you have the libdl library or equivalent.]) + LIBADD_DLOPEN="-ldl" libltdl_cv_lib_dl_dlopen="yes" + LT_DLLOADERS="$LT_DLLOADERS dlopen.la"], + [AC_TRY_LINK([#if HAVE_DLFCN_H +# include <dlfcn.h> +#endif + ], [dlopen(0, 0);], + [AC_DEFINE([HAVE_LIBDL], [1], + [Define if you have the libdl library or equivalent.]) + libltdl_cv_func_dlopen="yes" + LT_DLLOADERS="$LT_DLLOADERS dlopen.la"], + [AC_CHECK_LIB([svld], [dlopen], + [AC_DEFINE([HAVE_LIBDL], [1], + [Define if you have the libdl library or equivalent.]) + LIBADD_DLOPEN="-lsvld" libltdl_cv_func_dlopen="yes" + LT_DLLOADERS="$LT_DLLOADERS dlopen.la"])])]) +if test x"$libltdl_cv_func_dlopen" = xyes || test x"$libltdl_cv_lib_dl_dlopen" = xyes +then + lt_save_LIBS="$LIBS" + LIBS="$LIBS $LIBADD_DLOPEN" + AC_CHECK_FUNCS([dlerror]) + LIBS="$lt_save_LIBS" +fi +AC_SUBST([LIBADD_DLOPEN]) + +LIBADD_SHL_LOAD= +AC_CHECK_FUNC([shl_load], + [AC_DEFINE([HAVE_SHL_LOAD], [1], + [Define if you have the shl_load function.]) + LT_DLLOADERS="$LT_DLLOADERS shl_load.la"], + [AC_CHECK_LIB([dld], [shl_load], + [AC_DEFINE([HAVE_SHL_LOAD], [1], + [Define if you have the shl_load function.]) + LT_DLLOADERS="$LT_DLLOADERS shl_load.la" + LIBADD_SHL_LOAD="-ldld"])]) +AC_SUBST([LIBADD_SHL_LOAD]) + +AC_CHECK_FUNC([_dyld_func_lookup], + [AC_DEFINE([HAVE_DYLD], [1], + [Define if you have the _dyld_func_lookup function.]) + LT_DLLOADERS="$LT_DLLOADERS dyld.la"]) + +case $host_os in +beos*) + LT_DLLOADERS="$LT_DLLOADERS load_add_on.la" + ;; +cygwin* | mingw* | os2* | pw32*) + LT_DLLOADERS="$LT_DLLOADERS loadlibrary.la" + ;; +esac + +AC_CHECK_LIB([dld], [dld_link], + [AC_DEFINE([HAVE_DLD], [1], + [Define if you have the GNU dld library.]) + LT_DLLOADERS="$LT_DLLOADERS dld_link.la"]) +AC_SUBST([LIBADD_DLD_LINK]) + +m4_pattern_allow([^LT_DLPREOPEN$]) +LT_DLPREOPEN= +for lt_loader in $LT_DLLOADERS; do + LT_DLPREOPEN="$LT_DLPREOPEN-dlpreopen loaders/$lt_loader " +done +AC_SUBST([LT_DLPREOPEN]) + +dnl This isn't used anymore, but set it for backwards compatibility +LIBADD_DL="$LIBADD_DLOPEN $LIBADD_SHL_LOAD" +AC_SUBST([LIBADD_DL]) + +AC_LANG_POP +])# AC_LTDL_DLLIB + + +# AC_LTDL_SYMBOL_USCORE +# --------------------- +# does the compiler prefix global symbols with an underscore? +AC_DEFUN([AC_LTDL_SYMBOL_USCORE], +[AC_REQUIRE([AC_LIBTOOL_SYS_GLOBAL_SYMBOL_PIPE]) +AC_CACHE_CHECK([for _ prefix in compiled symbols], + [ac_cv_sys_symbol_underscore], + [ac_cv_sys_symbol_underscore=no + cat > conftest.$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 \| $lt_cv_sys_global_symbol_pipe \> $ac_nlist) && test -s "$ac_nlist"; then + # See whether the symbols have a leading underscore. + if grep '^. _nm_test_func' "$ac_nlist" >/dev/null; then + ac_cv_sys_symbol_underscore=yes + else + if grep '^. nm_test_func ' "$ac_nlist" >/dev/null; then + : + else + echo "configure: cannot find nm_test_func in $ac_nlist" >&AS_MESSAGE_LOG_FD + fi + fi + else + echo "configure: cannot run $lt_cv_sys_global_symbol_pipe" >&AS_MESSAGE_LOG_FD + fi + else + echo "configure: failed program was:" >&AS_MESSAGE_LOG_FD + cat conftest.c >&AS_MESSAGE_LOG_FD + fi + rm -rf conftest* + ]) +])# AC_LTDL_SYMBOL_USCORE + + +# AC_LTDL_DLSYM_USCORE +# -------------------- +AC_DEFUN([AC_LTDL_DLSYM_USCORE], +[AC_REQUIRE([AC_LTDL_SYMBOL_USCORE]) +if test x"$ac_cv_sys_symbol_underscore" = xyes; then + if test x"$libltdl_cv_func_dlopen" = xyes || + test x"$libltdl_cv_lib_dl_dlopen" = xyes ; then + AC_CACHE_CHECK([whether we have to add an underscore for dlsym], + [libltdl_cv_need_uscore], + [libltdl_cv_need_uscore=unknown + save_LIBS="$LIBS" + LIBS="$LIBS $LIBADD_DLOPEN" + _LT_AC_TRY_DLOPEN_SELF( + [libltdl_cv_need_uscore=no], [libltdl_cv_need_uscore=yes], + [], [libltdl_cv_need_uscore=cross]) + LIBS="$save_LIBS" + ]) + fi +fi + +if test x"$libltdl_cv_need_uscore" = xyes; then + AC_DEFINE(NEED_USCORE, 1, + [Define if dlsym() requires a leading underscore in symbol names.]) +fi +])# AC_LTDL_DLSYM_USCORE |