Allow only shared O+ build

Author: dstogov

ZendAccelerator.h

@@ -67,6 +67,8 @@
 #ifndef ZEND_EXT_API
 # if WIN32|WINNT
 #  define ZEND_EXT_API __declspec(dllexport)
+# elif defined(__GNUC__) && __GNUC__ >= 4
+#  define ZEND_EXT_API __attribute__ ((visibility("default")))
 # else
 #  define ZEND_EXT_API
 # endif

config.m4

@@ -341,7 +341,7 @@ int main() {
 	shared_alloc_mmap.c \
 	shared_alloc_posix.c \
 	Optimizer/zend_optimizer.c,
-	$ext_shared,,,,yes)
+	shared,,,,yes)
 
   PHP_ADD_BUILD_DIR([$ext_builddir/Optimizer], 1)
 fi