mono: add mono_cv_uscore to arm-linux site file

 add section to contrib/site-conf/m4/mono.m4, but this still needs some work.

1 files changed, 39 insertions, 0 deletions

diff --git a/contrib/site-conf/m4/mono.m4 b/contrib/site-conf/m4/mono.m4
index 4dcd34fbf8..4e0bb6296b 100644
--- a/contrib/site-conf/m4/mono.m4
+++ b/contrib/site-conf/m4/mono.m4
@@ -1 +1,40 @@
 # Tests for mono
+# this likely does not work, needs to be packaged.
+# the MONO_DL_NEED_USCORE is the macro that needs to be defined in site.conf
+
+dnl dynamic loader support
+AC_CHECK_FUNC(dlopen, DL_LIB="",
+	AC_CHECK_LIB(dl, dlopen, DL_LIB="-ldl", dl_support=no)
+)
+if test x$dl_support = xno; then
+	AC_MSG_WARN([No dynamic loading support available])
+else
+	LIBS="$LIBS $DL_LIB"
+	AC_DEFINE(HAVE_DL_LOADER,1,[dlopen-based dynamic loader available])
+	dnl from glib's configure.in
+	AC_CACHE_CHECK([for preceeding underscore in symbols],
+		mono_cv_uscore,[
+		AC_TRY_RUN([#include <dlfcn.h>
+		int mono_underscore_test (void) { return 42; }
+		int main() {
+		  void *f1 = (void*)0, *f2 = (void*)0, *handle;
+		  handle = dlopen ((void*)0, 0);
+		  if (handle) {
+		    f1 = dlsym (handle, "mono_underscore_test");
+		    f2 = dlsym (handle, "_mono_underscore_test");
+		  } return (!f2 || f1);
+		}],
+			[mono_cv_uscore=yes],
+			[mono_cv_uscore=no],
+		[])
+	])
+	if test "x$mono_cv_uscore" = "xyes"; then
+		MONO_DL_NEED_USCORE=1
+	else
+		MONO_DL_NEED_USCORE=0
+	fi
+	AC_SUBST(MONO_DL_NEED_USCORE)
+	AC_CHECK_FUNC(dlerror)
+fi
+
+