[FFmpeg-cvslog] compat: wrap math.h to avoid AIX-specific clashes

[Luca Barbato]

ffmpeg | branch: master | Luca Barbato <lu_zero at gentoo.org> | Thu Jul  4 21:53:08 2013 +0200| [d3635f3ab0a234c830dfb4ddb9c6a4ea2677dace] | committer: Luca Barbato

compat: wrap math.h to avoid AIX-specific clashes

AIX defines a class() function in its math.h header without any
guard.

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=d3635f3ab0a234c830dfb4ddb9c6a4ea2677dace
---

 compat/aix/math.h |   14 ++++++++++++++
 configure         |    3 +++
 2 files changed, 17 insertions(+)

diff --git a/compat/aix/math.h b/compat/aix/math.h
new file mode 100644
index 0000000..7c8134c
--- /dev/null
+++ b/compat/aix/math.h
@@ -0,0 +1,14 @@
+/*
+ * Workaround aix-specific class() function clashing with libav class usage
+ */
+
+#ifndef COMPAT_AIX_MATH_H
+#define COMPAT_AIX_MATH_H
+
+#define class class_in_math_h_causes_problems
+
+#include_next <math.h>
+
+#undef class
+
+#endif /* COMPAT_AIX_MATH_H */
diff --git a/configure b/configure
index db591e8..e1edbe6 100755
--- a/configure
+++ b/configure
@@ -3049,6 +3049,9 @@ enabled spic && enable_weak pic
 
 # OS specific
 case $target_os in
+    aix)
+        add_cppflags '-I\$(SRC_PATH)/compat/aix'
+        ;;
     haiku)
         prefix_default="/boot/common"
         network_extralibs="-lnetwork"