Some headers use QEMU_BUILD_BUG_ON. This causes a problem
if the C file including that header happens to have
QEMU_BUILD_BUG_ON at the same line number.
Fix using a widely available extension: __COUNTER__.
If unavailable, provide a stub.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
#define typeof_field(type, field) typeof(((type *)0)->field)
#define type_check(t1,t2) ((t1*)0 - (t2*)0)
+#ifdef __COUNTER__
#define QEMU_BUILD_BUG_ON(x) \
- typedef char glue(qemu_build_bug_on__, __LINE__)[(x) ? -1 : 1] \
+ typedef char glue(qemu_build_bug_on__, __COUNTER__)[(x) ? -1 : 1] \
__attribute__((unused))
+#else
+#define QEMU_BUILD_BUG_ON(x)
+#endif
#if defined __GNUC__
# if !QEMU_GNUC_PREREQ(4, 4)