1 |
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AC_PREREQ(2.50) |
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dnl Process this file with autoconf to create configure. |
dnl Process this file with autoconf to create configure. |
3 |
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4 |
AC_INIT(ltdl.c) |
AC_INIT(ltdl.c) |
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6 |
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dnl We shouldn't be using these internal macros of autoconf, |
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dnl but CONFIG_AUX_DIR($with_auxdir) breaks automake. |
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AC_ARG_WITH(auxdir, |
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[ --with-auxdir=DIR path to autoconf auxiliary files], |
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[AC_CONFIG_AUX_DIRS($with_auxdir)], |
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[AC_CONFIG_AUX_DIR_DEFAULT]) |
12 |
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13 |
if test -z "$enable_ltdl_install$enable_ltdl_convenience"; then |
if test -z "$enable_ltdl_install$enable_ltdl_convenience"; then |
14 |
if test -f ${srcdir}/ltconfig && test -f ${srcdir}/ltmain.sh; then |
if test -f ${srcdir}/ltmain.sh; then |
15 |
# if libltdl is libtoolized, it is assumed to be stand-alone and |
# if libltdl is libtoolized, it is assumed to be stand-alone and |
16 |
# installed unless the command line overrides it (tested above) |
# installed unless the command line overrides it (tested above) |
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enable_ltdl_install=yes |
enable_ltdl_install=yes |
22 |
fi |
fi |
23 |
fi |
fi |
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25 |
AM_INIT_AUTOMAKE(libltdl,1.0,-) |
AM_INIT_AUTOMAKE(libltdl,1.2,-) |
26 |
AM_CONFIG_HEADER(config.h) |
AM_CONFIG_HEADER(config.h:config-h.in) |
27 |
AM_MAINTAINER_MODE |
AM_MAINTAINER_MODE |
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29 |
AC_PROG_CC |
AC_PROG_CC |
30 |
AC_C_CONST |
AC_C_CONST |
31 |
AC_C_INLINE |
AC_C_INLINE |
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AC_LIBTOOL_WIN32_DLL |
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AM_PROG_LIBTOOL |
AM_PROG_LIBTOOL |
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AC_SUBST(LIBTOOL_DEPS) |
AC_SUBST(LIBTOOL_DEPS) |
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AC_ARG_ENABLE(ltdl-install, |
AC_LIB_LTDL |
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[ --enable-ltdl-install install libltdl]) |
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AM_CONDITIONAL(INSTALL_LTDL, test x"${enable_ltdl_install-no}" != xno) |
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AM_CONDITIONAL(CONVENIENCE_LTDL, test x"${enable_ltdl_convenience-no}" != xno) |
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dnl Read the libtool configuration |
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rm -f conftest |
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./libtool --config > conftest |
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. ./conftest |
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rm -f conftest |
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AC_CACHE_CHECK([which extension is used for shared libraries], |
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libltdl_cv_shlibext, [dnl |
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( |
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last= |
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for spec in $library_names_spec; do |
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last="$spec" |
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done |
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changequote(, ) |
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echo "$last" | sed 's/\[.*\]//;s/^[^.]*//;s/\$.*$//;s/\.$//' > conftest |
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changequote([, ]) |
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) |
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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_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, "$libltdl_cv_shlibpath_var", |
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[Define to the name of the environment variable that determines the dynamic library search path. ]) |
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fi |
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AC_CACHE_CHECK([for objdir], |
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libltdl_cv_objdir, [libltdl_cv_objdir="$objdir"]) |
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test -z "$libltdl_cv_objdir" && libltdl_cv_objdir=".libs" |
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AC_DEFINE_UNQUOTED(LTDL_OBJDIR, "$libltdl_cv_objdir/", |
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[Define to the sub-directory in which libtool stores uninstalled libraries. ]) |
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AC_HEADER_STDC |
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AC_CHECK_HEADERS(malloc.h memory.h stdlib.h stdio.h ctype.h dlfcn.h 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_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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LIBADD_DL= |
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AC_CHECK_LIB(dl, dlopen, [AC_DEFINE(HAVE_LIBDL, 1) LIBADD_DL="-ldl"], |
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[AC_CHECK_FUNC(dlopen, [AC_DEFINE(HAVE_LIBDL, 1)])]) |
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AC_CHECK_FUNC(shl_load, [AC_DEFINE(HAVE_SHL_LOAD, 1)], |
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[AC_CHECK_LIB(dld, shl_load, [AC_DEFINE(HAVE_SHL_LOAD, 1) LIBADD_DL="$LIBADD_DL -ldld"])]) |
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AC_CHECK_LIB(dld, dld_link, [AC_DEFINE(HAVE_DLD, 1)dnl |
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test "x$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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dnl Check for command to grab the raw symbol name followed |
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dnl by C symbol name from nm. |
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AC_REQUIRE([AC_CANONICAL_HOST])dnl |
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AC_REQUIRE([AC_PROG_NM])dnl |
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# Check for command to grab the raw symbol name followed by C symbol from nm. |
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AC_MSG_CHECKING([command to parse $NM output]) |
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AC_CACHE_VAL(ac_cv_sys_global_symbol_pipe, |
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[# These are sane defaults that work on at least a few old systems. |
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# {They come from Ultrix. What could be older than Ultrix?!! ;)} |
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changequote(,)dnl |
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# Character class describing NM global symbol codes. |
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ac_symcode='[BCDEGRST]' |
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# Regexp to match symbols that can be accessed directly from C. |
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ac_sympat='\([_A-Za-z][_A-Za-z0-9]*\)' |
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# Transform the above into a raw symbol and a C symbol. |
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ac_symxfrm='\1 \2\3 \3' |
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# Transform an extracted symbol line into a proper C declaration |
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ac_global_symbol_to_cdecl="sed -n -e 's/^. .* \(.*\)$/extern char \1;/p'" |
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# Define system-specific variables. |
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case "$host_os" in |
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aix*) |
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ac_symcode='[BCDT]' |
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;; |
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cygwin* | mingw*) |
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ac_symcode='[ABCDGISTW]' |
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;; |
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hpux*) |
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ac_global_symbol_to_cdecl="sed -n -e 's/^T .* \(.*\)$/extern char \1();/p' -e 's/^. .* \(.*\)$/extern char \1;/p'" |
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;; |
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irix*) |
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ac_symcode='[BCDEGRST]' |
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;; |
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solaris*) |
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ac_symcode='[BDT]' |
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;; |
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esac |
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# If we're using GNU nm, then use its standard symbol codes. |
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if $NM -V 2>&1 | egrep '(GNU|with BFD)' > /dev/null; then |
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ac_symcode='[ABCDGISTW]' |
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fi |
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changequote([,])dnl |
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# Try without a prefix undercore, then with it. |
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for ac_symprfx in "" "_"; do |
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ac_cv_sys_global_symbol_pipe="sed -n -e 's/^.*[ ]\($ac_symcode\)[ ][ ]*\($ac_symprfx\)$ac_sympat$/$ac_symxfrm/p'" |
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# Check to see that the pipe works correctly. |
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ac_pipe_works=no |
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rm -f conftest.$ac_ext |
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cat > conftest.$ac_ext <<EOF |
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#ifdef __cplusplus |
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extern "C" { |
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#endif |
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char nm_test_var; |
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void nm_test_func(){} |
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#ifdef __cplusplus |
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} |
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#endif |
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int main(){nm_test_var='a';nm_test_func;return 0;} |
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EOF |
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if AC_TRY_EVAL(ac_compile); then |
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# Now try to grab the symbols. |
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ac_nlist=conftest.nm |
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if AC_TRY_EVAL(NM conftest.$ac_objext \| $ac_cv_sys_global_symbol_pipe \> $ac_nlist) && test -s "$ac_nlist"; then |
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# Try sorting and uniquifying the output. |
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if sort "$ac_nlist" | uniq > "$ac_nlist"T; then |
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mv -f "$ac_nlist"T "$ac_nlist" |
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else |
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rm -f "$ac_nlist"T |
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fi |
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# Make sure that we snagged all the symbols we need. |
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if egrep ' nm_test_var$' "$ac_nlist" >/dev/null; then |
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if egrep ' nm_test_func$' "$ac_nlist" >/dev/null; then |
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cat <<EOF > conftest.c |
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#ifdef __cplusplus |
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extern "C" { |
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#endif |
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EOF |
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# Now generate the symbol file. |
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eval "$ac_global_symbol_to_cdecl"' < "$ac_nlist" >> conftest.c' |
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cat <<EOF >> conftest.c |
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#if defined (__STDC__) && __STDC__ |
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# define lt_ptr_t void * |
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#else |
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# define lt_ptr_t char * |
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# define const |
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#endif |
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/* The mapping between symbol names and symbols. */ |
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const struct { |
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const char *name; |
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lt_ptr_t address; |
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} |
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changequote(,)dnl |
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lt_preloaded_symbols[] = |
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changequote([,])dnl |
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{ |
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EOF |
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sed 's/^. \(.*\) \(.*\)$/ {"\2", (lt_ptr_t) \&\2},/' < "$ac_nlist" >> conftest.c |
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cat <<\EOF >> conftest.c |
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{0, (lt_ptr_t) 0} |
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}; |
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#ifdef __cplusplus |
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} |
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#endif |
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EOF |
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# Now try linking the two files. |
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mv conftest.$ac_objext conftstm.$ac_objext |
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ac_save_LIBS="$LIBS" |
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ac_save_CFLAGS="$CFLAGS" |
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LIBS="conftstm.$ac_objext" |
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CFLAGS="$CFLAGS$no_builtin_flag" |
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if AC_TRY_EVAL(ac_link) && test -s conftest; then |
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ac_pipe_works=yes |
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else |
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echo "configure: failed program was:" >&AC_FD_CC |
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cat conftest.c >&AC_FD_CC |
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fi |
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LIBS="$ac_save_LIBS" |
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CFLAGS="$ac_save_CFLAGS" |
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else |
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echo "cannot find nm_test_func in $ac_nlist" >&AC_FD_CC |
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fi |
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else |
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echo "cannot find nm_test_var in $ac_nlist" >&AC_FD_CC |
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fi |
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else |
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echo "cannot run $ac_cv_sys_global_symbol_pipe" >&AC_FD_CC |
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fi |
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else |
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echo "$progname: 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* conftst* |
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# Do not use the global_symbol_pipe unless it works. |
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if test "$ac_pipe_works" = yes; then |
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if test x"$ac_symprfx" = x"_"; then |
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ac_cv_sys_symbol_underscore=yes |
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else |
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ac_cv_sys_symbol_underscore=no |
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fi |
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break |
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else |
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ac_cv_sys_global_symbol_pipe= |
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fi |
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done |
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]) |
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ac_result=yes |
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if test -z "$ac_cv_sys_global_symbol_pipe"; then |
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ac_result=no |
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fi |
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AC_MSG_RESULT($ac_result) |
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dnl does the compiler prefix global symbols with an underscore? |
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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 \| $ac_cv_sys_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 $ac_cv_sys_global_symbol_pipe" >&AC_FD_CC |
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fi |
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else |
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echo "configure: failed program was:" >&AC_FD_CC |
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cat conftest.c >&AC_FD_CC |
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fi |
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rm -rf conftest* |
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]) |
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AC_MSG_RESULT($ac_cv_sys_symbol_underscore) |
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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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AC_TRY_RUN([ |
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#if HAVE_DLFCN_H |
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#include <dlfcn.h> |
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#endif |
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#include <stdio.h> |
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#ifdef RTLD_GLOBAL |
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# define LTDL_GLOBAL RTLD_GLOBAL |
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#else |
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# ifdef DL_GLOBAL |
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# define LTDL_GLOBAL DL_GLOBAL |
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# else |
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# define LTDL_GLOBAL 0 |
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# endif |
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#endif |
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/* We may have to define LTDL_LAZY_OR_NOW in the command line if we |
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find out it does not work in some platform. */ |
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#ifndef LTDL_LAZY_OR_NOW |
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# ifdef RTLD_LAZY |
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# define LTDL_LAZY_OR_NOW RTLD_LAZY |
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# else |
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# ifdef DL_LAZY |
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# define LTDL_LAZY_OR_NOW DL_LAZY |
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# else |
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# ifdef RTLD_NOW |
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# define LTDL_LAZY_OR_NOW RTLD_NOW |
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# else |
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# ifdef DL_NOW |
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# define LTDL_LAZY_OR_NOW DL_NOW |
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# else |
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# define LTDL_LAZY_OR_NOW 0 |
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# endif |
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# endif |
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# endif |
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# endif |
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#endif |
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fnord() { int i=42;} |
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main() { void *self, *ptr1, *ptr2; self=dlopen(0,LTDL_GLOBAL|LTDL_LAZY_OR_NOW); |
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if(self) { ptr1=dlsym(self,"fnord"); ptr2=dlsym(self,"_fnord"); |
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if(ptr1 && !ptr2) { dlclose(self); exit(0); } } exit(1); } |
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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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)]) |
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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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38 |
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39 |
dnl Output the makefile |
dnl Output the makefile |
40 |
AC_OUTPUT(Makefile) |
AC_OUTPUT(Makefile) |