build: Require GCC 4.1 or later.

Centralise the version check in Config.mk. Any more strict version
requirements can be added to specific subdirs/arches.

Signed-off-by: Keir Fraser <keir@xen.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/Config.mk b/Config.mk
index b9c7a9df75..d99b9a1141 100644
--- a/Config.mk
+++ b/Config.mk
@@ -119,6 +119,10 @@ define cc-ver-check-closure
     endif
 endef
 
+# Require GCC v4.1+
+check-$(gcc) = $(call cc-ver-check,CC,0x040100,"Xen requires at least gcc-4.1")
+$(eval $(check-y))
+
 define buildmakevars2shellvars
     export PREFIX="$(PREFIX)";                                            \
     export XEN_SCRIPT_DIR="$(XEN_SCRIPT_DIR)";                            \