[Qemu-devel] [PATCH for-1.1] arch_init: Fix AltiVec build on Darwin/ppc

["Andreas Färber" <andreas.faerber@web.de>]

Commit f29a56147b66845914d0a645bf9b4c5bb9a6af57 (implement
-no-user-config command-line option (v3)) introduced uses of bool
in arch_init.c. Shortly before that usage is support code for
AltiVec (conditional to __ALTIVEC__).

GCC's altivec.h may in a !__APPLE_ALTIVEC__ code path redefine bool,
leading to type mismatches. altivec.h recommends to #undef for C++
compatibility, but doing so on C leads to bool remaining undefined.

Fix by redefining bool to _Bool as mandated for stdbool.h by POSIX.

Signed-off-by: Andreas Färber <andreas.faerber@web.de>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Alexander Graf <agraf@suse.de>
Cc: qemu-ppc <qemu-ppc@nongnu.org>
---
 arch_init.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/arch_init.c b/arch_init.c
index 988adca..a9e8b74 100644
--- a/arch_init.c
+++ b/arch_init.c
@@ -100,6 +100,10 @@ const uint32_t arch_type = QEMU_ARCH;
 #define VECTYPE        vector unsigned char
 #define SPLAT(p)       vec_splat(vec_ld(0, p), 0)
 #define ALL_EQ(v1, v2) vec_all_eq(v1, v2)
+/* altivec.h may redefine the bool macro as vector type.
+ * Reset it to POSIX semantics. */
+#undef bool
+#define bool _Bool
 #elif defined __SSE2__
 #include <emmintrin.h>
 #define VECTYPE        __m128i
-- 
1.7.5.3