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-rw-r--r--configure.in7
1 files changed, 6 insertions, 1 deletions
diff --git a/configure.in b/configure.in
index a930bfa..8c99b48 100644
--- a/configure.in
+++ b/configure.in
@@ -99,12 +99,17 @@ AC_CHECK_HEADER([GL/gl.h], \
[AC_DEFINE(HAVE_OPENGL, 1, [openGL support]) have_gl=yes], \
[AC_DEFINE(NO_OPENGL, 1, [No openGL support])])
-
+AC_LANG_SAVE
+AC_LANG_CPLUSPLUS
+cxx_flags_safe="$CXXFLAGS"
+CXXFLAGS="$CXXFLAGS -D__STDC_CONSTANT_MACROS"
AC_CHECK_HEADER([ffmpeg/avcodec.h], \
[AC_DEFINE(OLD_FFMPEG,1, [old ffmpeg])], \
[AC_CHECK_HEADER([libavcodec/avcodec.h], \
[AC_DEFINE(NEW_FFMPEG,1, [new ffmpeg])], \
[AC_MSG_ERROR([libavcodec may be missing]) ])])
+CXXFLAGS="$cxx_flags_safe"
+AC_LANG_RESTORE
AC_LANG_SAVE
AC_LANG_CPLUSPLUS