[runtime] Use -fvisibility=hidden so only symbols marked with MONO_API are exported...

diff --git a/configure.ac b/configure.ac
index abed4c36cdec1f12dcb0d453193bf2ac365b0863..52b2e0b6f2817c2f3cd7658eadca0fd0bb3398a3 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -540,6 +540,10 @@ if test x"$GCC" = xyes; then
                CFLAGS="$CFLAGS -fwrapv"
 
                CFLAGS="$CFLAGS -DMONO_DLL_EXPORT"
+               # Don't export any symbols by default
+               SHARED_CFLAGS="-fvisibility=hidden"
+               CFLAGS_FOR_EGLIB="$CFLAGS_FOR_EGLIB -fvisibility=hidden"
+               CXXFLAGS="$CXXFLAGS -fvisibility=hidden"
 
                ORIG_CFLAGS=$CFLAGS
                CFLAGS="$CFLAGS -Wdeclaration-after-statement"
@@ -683,6 +687,7 @@ if test x$werror_flag = xyes; then
        WERROR_CFLAGS="-Werror"
 fi
 AC_SUBST([WERROR_CFLAGS])
+AC_SUBST([SHARED_CFLAGS])
 
 ac_configure_args="$ac_configure_args \"CPPFLAGS_FOR_EGLIB=$EGLIB_CPPFLAGS\" \"CFLAGS_FOR_EGLIB=$CFLAGS_FOR_EGLIB\""
 AC_CONFIG_SUBDIRS(eglib)