Unified DLL/shared library export import symbol visibility specification.

This is more or less how Wikipedia example suggests the macros
names and use.

To change default symbols visibility next options should be
specified in config.omk file.

CFLAGS += -fvisibility=hidden
LDLAGS += -fvisibility=hidden

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>

diff --git a/ulut/ul_utexport.h b/ulut/ul_utexport.h
index 4abe37623b30b5ee37fdb69235ac9e4a4d746253..1bed464a11f711901cc4761e9cac613b9c09f87e 100644 (file)
--- a/ulut/ul_utexport.h
+++ b/ulut/ul_utexport.h
@@ -1,20 +1,23 @@
 /* Shared library support */
 #ifndef UL_EXPORT
   #if defined(_WIN32)&&defined(_MSC_VER)
-    #define UL_IMPORT __declspec(dllimport)
-    #define UL_EXPORT __declspec(dllexport)
-    #define UL_DLLLOCAL
-    #define UL_DLLPUBLIC
+    #define UL_DLL_IMPORT __declspec(dllimport)
+    #define UL_DLL_EXPORT __declspec(dllexport)
+    #define UL_DLL_LOCAL
+    #define UL_DLL_PUBLIC
   #else
-    #define UL_IMPORT
+    #if (__GNUC__ >= 4) && !defined(GCC_HASCLASSVISIBILITY)
+       #define GCC_HASCLASSVISIBILITY
+    #endif
+    #define UL_DLL_IMPORT
     #ifdef GCC_HASCLASSVISIBILITY
-      #define UL_EXPORT __attribute__ ((visibility("default")))
-      #define UL_DLLLOCAL __attribute__ ((visibility("hidden")))
-      #define UL_DLLPUBLIC __attribute__ ((visibility("default")))
+      #define UL_DLL_EXPORT __attribute__ ((visibility("default")))
+      #define UL_DLL_LOCAL __attribute__ ((visibility("hidden")))
+      #define UL_DLL_PUBLIC __attribute__ ((visibility("default")))
     #else
-      #define UL_EXPORT
-      #define UL_DLLLOCAL
-      #define UL_DLLPUBLIC
+      #define UL_DLL_EXPORT
+      #define UL_DLL_LOCAL
+      #define UL_DLL_PUBLIC
     #endif
   #endif
 #endif /* UL_EXPORT */