merge: add infra for evil

SVN revision: 76463

1 files changed, 56 insertions, 0 deletions

diff --git a/m4/efl_attribute.m4 b/m4/efl_attribute.m4
new file mode 100644
index 0000000000..78bff15679
--- /dev/null
+++ b/m4/efl_attribute.m4
@@ -0,0 +1,56 @@
+dnl Copyright (C) 2011 Vincent Torri <vtorri at univ-evry dot fr>
+dnl That code is public domain and can be freely used or copied.
+
+dnl Macros for checking if the compiler supports some __attribute__ uses
+
+dnl Usage: EFL_ATTRIBUTE_UNUSED
+dnl call AC_DEFINE for __UNUSED__ if __attribute__((unused)) is available
+
+AC_DEFUN([EFL_ATTRIBUTE_UNUSED],
+[
+AC_MSG_CHECKING([for __attribute__ ((unused))])
+AC_COMPILE_IFELSE(
+   [AC_LANG_PROGRAM(
+       [[
+void foo(int x __attribute__ ((unused))) {}
+       ]],
+       [[
+       ]])],
+   [have_attribute_unused="yes"],
+   [have_attribute_unused="no"])
+AC_MSG_RESULT([${have_attribute_unused}])
+
+if test "x${have_attribute_unused}" = "xyes" ; then
+   AC_DEFINE([__UNUSED__], [__attribute__ ((unused))], [Macro declaring a function argument to be unused.])
+else
+   AC_DEFINE([__UNUSED__], [], [__attribute__ ((unused)) is not supported.])
+fi
+])
+
+dnl Usage: EFL_ATTRIBUTE_VECTOR
+dnl call AC_DEFINE for HAVE_GCC_ATTRIBUTE_VECTOR if __attribute__((vector)) is available
+
+AC_DEFUN([EFL_ATTRIBUTE_VECTOR],
+[
+AC_MSG_CHECKING([for __attribute__ ((vector))])
+AC_COMPILE_IFELSE(
+   [AC_LANG_PROGRAM(
+       [[
+typedef int v4si __attribute__ ((vector_size (16)));
+       ]],
+       [[
+if (sizeof(v4si) == 16)
+  return 0;
+else
+  return -1;
+       ]])],
+   [have_attribute_vector="yes"],
+   [have_attribute_vector="no"])
+AC_MSG_RESULT([${have_attribute_vector}])
+
+if test "x${have_attribute_vector}" = "xyes" ; then
+   AC_DEFINE([HAVE_GCC_ATTRIBUTE_VECTOR], [1], [Define to 1 if your compiler supports __attribute__ ((vector)).])
+fi
+])
+
+dnl End of efl_attribute.m4