1 files changed, 51 insertions, 0 deletions
diff --git a/m4/efl_attribute.m4 b/m4/efl_attribute.m4
index cd42e9cda6..4f31d93175 100644
--- a/m4/efl_attribute.m4
+++ b/m4/efl_attribute.m4
@@ -29,4 +29,55 @@ if test "x${have_attribute_vector}" = "xyes" ; then
 fi
 ])
 
+dnl Usage: EFL_ATTRIBUTE_ALWAYS_INLINE
+dnl call AC_DEFINE for alway_inline if __attribute__((always_inline)) is available
+
+AC_DEFUN([EFL_ATTRIBUTE_ALWAYS_INLINE],
+[
+
+have_attribute_forceinline="no"
+
+AC_MSG_CHECKING([for __forceinline])
+
+AC_COMPILE_IFELSE(
+   [AC_LANG_PROGRAM(
+       [[
+#include <windows.h>
+static __forceinline void foo(void) {}
+       ]],
+       [[
+       ]])],
+   [
+    have_attribute_always_inline="yes"
+    have_attribute_forceinline="yes"
+   ],
+   [have_attribute_always_inline="no"])
+
+AC_MSG_RESULT([${have_attribute_always_inline}])
+
+if test "x${have_attribute_always_inline}" = "xno" ; then
+   AC_MSG_CHECKING([for __attribute__ ((__always_inline__))])
+   AC_COMPILE_IFELSE(
+      [AC_LANG_PROGRAM(
+          [[
+static __attribute__((__always_inline__)) inline void foo(void) {}
+          ]],
+          [[
+          ]])],
+      [have_attribute_always_inline="yes"],
+      [have_attribute_always_inline="no"])
+   AC_MSG_RESULT([${have_attribute_always_inline}])
+fi
+
+if test "x${have_attribute_always_inline}" = "xyes" ; then
+   if test "x${have_attribute_forceinline}" = "xyes" ; then
+      AC_DEFINE([EFL_ALWAYS_INLINE], [__forceinline], [Macro declaring a function to always be inlined.])
+   else
+      AC_DEFINE([EFL_ALWAYS_INLINE], [__attribute__ ((__always_inline__)) inline], [Macro declaring a function to always be inlined.])
+   fi
+else
+   AC_DEFINE([EFL_ALWAYS_INLINE], [static inline], [Macro declaring a function to always be inlined.])
+fi
+])
+
 dnl End of efl_attribute.m4