diff options
Diffstat (limited to 'include/qemu/compiler.h')
| -rw-r--r-- | include/qemu/compiler.h | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/include/qemu/compiler.h b/include/qemu/compiler.h index 157698bfa9..e0ce9ffb28 100644 --- a/include/qemu/compiler.h +++ b/include/qemu/compiler.h @@ -85,8 +85,20 @@ #define typeof_field(type, field) typeof(((type *)0)->field) #define type_check(t1,t2) ((t1*)0 - (t2*)0) -#define QEMU_BUILD_BUG_ON(x) \ - typedef char glue(qemu_build_bug_on__,__LINE__)[(x)?-1:1] __attribute__((unused)); +#define QEMU_BUILD_BUG_ON_STRUCT(x) \ + struct { \ + int:(x) ? -1 : 1; \ + } + +#ifdef __COUNTER__ +#define QEMU_BUILD_BUG_ON(x) typedef QEMU_BUILD_BUG_ON_STRUCT(x) \ + glue(qemu_build_bug_on__, __COUNTER__) __attribute__((unused)) +#else +#define QEMU_BUILD_BUG_ON(x) +#endif + +#define QEMU_BUILD_BUG_ON_ZERO(x) (sizeof(QEMU_BUILD_BUG_ON_STRUCT(x)) - \ + sizeof(QEMU_BUILD_BUG_ON_STRUCT(x))) #if defined __GNUC__ # if !QEMU_GNUC_PREREQ(4, 4) |