TMP: add a ctdb snapshot of current ctdb master (git://git.samba.org/ctdb.git) to...

[obnox/samba/samba-obnox.git] / ctdb / lib / replace / dlfcn.m4

diff --git a/ctdb/lib/replace/dlfcn.m4 b/ctdb/lib/replace/dlfcn.m4
new file mode 100644 (file)
index 0000000..42f56f2
--- /dev/null
+++ b/ctdb/lib/replace/dlfcn.m4
@@ -0,0 +1,31 @@
+dnl dummies provided by dlfcn.c if not available
+save_LIBS="$LIBS"
+LIBS=""
+
+libreplace_cv_dlfcn=no
+AC_SEARCH_LIBS(dlopen, dl)
+
+AC_CHECK_HEADERS(dlfcn.h)
+AC_CHECK_FUNCS([dlopen dlsym dlerror dlclose],[],[libreplace_cv_dlfcn=yes])
+
+libreplace_cv_shl=no
+AC_SEARCH_LIBS(shl_load, sl)
+AC_CHECK_HEADERS(dl.h)
+AC_CHECK_FUNCS([shl_load shl_unload shl_findsym],[],[libreplace_cv_shl=yes])
+
+AC_VERIFY_C_PROTOTYPE([void *dlopen(const char* filename, unsigned int flags)],
+       [
+       return 0;
+       ],[
+       AC_DEFINE(DLOPEN_TAKES_UNSIGNED_FLAGS, 1, [Whether dlopen takes unsigned int flags])
+       ],[],[
+       #include <dlfcn.h>
+       ])
+
+if test x"${libreplace_cv_dlfcn}" = x"yes";then
+       LIBREPLACEOBJ="${LIBREPLACEOBJ} dlfcn.o"
+fi
+
+LIBDL="$LIBS"
+AC_SUBST(LIBDL)
+LIBS="$save_LIBS"