[XEN] Can be built -std=gnu99 (except for .S files).

Need to be careful with static initialisers:
 1. *_LOCK_UNLOCKED, CPU_MASK_* no longer include a cast
 2. Dynamic uses of the above are replaced by
    appropriate function invocations.

Signed-off-by: Keir Fraser <keir@xensource.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/Config.mk b/Config.mk
index 4f1b1f7c1a..e626a26283 100644
--- a/Config.mk
+++ b/Config.mk
@@ -34,6 +34,8 @@ else
 CFLAGS += -g
 endif
 
+CFLAGS += -std=gnu99
+
 CFLAGS += -Wall -Wstrict-prototypes
 
 # -Wunused-value makes GCC 4.x too aggressive for my taste: ignoring the