# HG changeset patch
# User Luke Mewburn <luke@mewburn.net>
# Date 1585542708 -39600
# Node ID a89913941dcfc599ce9f7b23361a127b23dd8396
# Parent  fadf8947c0fbf3b2ebaa9b2bd36f2283c99b0f18
extensions: hide symbols by default

Hide extension.fdx symbols by default, by setting the
target property <LANG>C_VISIBILITY_PRESET hidden.
This requires cmake 2.8+

Explicitly export fd_ext_init() and fd_ext_fini(),
using gcc or clang's __attribute__((visibility()))

diff -r fadf8947c0fb -r a89913941dcf extensions/CMakeLists.txt
--- a/extensions/CMakeLists.txt	Mon Mar 30 12:38:31 2020 +1100
+++ b/extensions/CMakeLists.txt	Mon Mar 30 15:31:48 2020 +1100
@@ -10,6 +10,8 @@
   ADD_LIBRARY(${EXTNAME} MODULE ${ARGN})
   SET_TARGET_PROPERTIES(${EXTNAME} PROPERTIES PREFIX "" )
   SET_TARGET_PROPERTIES(${EXTNAME} PROPERTIES SUFFIX ".fdx" )
+  SET_TARGET_PROPERTIES(${EXTNAME} PROPERTIES C_VISIBILITY_PRESET hidden )
+  SET_TARGET_PROPERTIES(${EXTNAME} PROPERTIES CXX_VISIBILITY_PRESET hidden )
 ENDMACRO(FD_ADD_EXTENSION)
 
 # Use the macro FD_EXTENSION_SUBDIR(extmacroname subdir descr default) to
diff -r fadf8947c0fb -r a89913941dcf include/freeDiameter/extension.h
--- a/include/freeDiameter/extension.h	Mon Mar 30 12:38:31 2020 +1100
+++ b/include/freeDiameter/extension.h	Mon Mar 30 15:31:48 2020 +1100
@@ -48,6 +48,8 @@
 #define EXTENSION_ENTRY(_name, _function, _depends...)					\
 const char *fd_ext_depends[] = { _name , ## _depends , NULL };				\
 static int extension_loaded = 0;							\
+											\
+__attribute__((visibility("default")))							\
 int fd_ext_init(int major, int minor, char * conffile) {				\
 	if ((major != FD_PROJECT_VERSION_MAJOR)						\
 		|| (minor != FD_PROJECT_VERSION_MINOR)) {				\
@@ -63,7 +65,11 @@
 	}										\
 	extension_loaded++;								\
 	return (_function)(conffile);							\
-}														
+}
+
+/* Optional exit point (finish function) of the extension */
+__attribute__((visibility("default")))
+void fd_ext_fini(void);
 
 #ifdef __cplusplus
 }