diff -urN libmpeg2.orig/configure.ac libmpeg2/configure.ac
--- libmpeg2.orig/configure.ac	2015-07-12 12:53:19.295988900 +0100
+++ libmpeg2/configure.ac	2015-07-12 12:53:27.344449300 +0100
@@ -142,7 +142,6 @@
 
 dnl Checks for typedefs, structures, and compiler characteristics.
 AC_C_CONST
-AC_C_ALWAYS_INLINE
 AC_C_RESTRICT
 AC_C_BUILTIN_EXPECT
 AC_C_BIGENDIAN