[PATCH v2 1/8] osdep: Avoid using Clang-specific __builtin_available()

[Philippe Mathieu-Daudé via]

Remove the Clang specific __builtin_available() to allow building
with GCC, otherwise we get:

  include/qemu/osdep.h: In function 'qemu_thread_jit_write':
  include/qemu/osdep.h:787:9: warning: implicit declaration of function 
'__builtin_available'; did you mean '__builtin_scalbl'? 
[-Wimplicit-function-declaration]
    787 |     if (__builtin_available(macOS 11.0, *)) {
        |         ^~~~~~~~~~~~~~~~~~~
        |         __builtin_scalbl
  include/qemu/osdep.h:787:9: warning: nested extern declaration of 
'__builtin_available' [-Wnested-externs]
  include/qemu/osdep.h:787:29: error: 'macOS' undeclared (first use in this 
function)
    787 |     if (__builtin_available(macOS 11.0, *)) {
        |                             ^~~~~
  include/qemu/osdep.h:787:29: note: each undeclared identifier is reported 
only once for each function it appears in
  include/qemu/osdep.h:787:34: error: expected ')' before numeric constant
    787 |     if (__builtin_available(macOS 11.0, *)) {
        |                            ~     ^~~~~
        |                                  )

Signed-off-by: Philippe Mathieu-Daudé <f4...@amsat.org>
---
 include/qemu/osdep.h | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/include/qemu/osdep.h b/include/qemu/osdep.h
index d1660d67fa..aecd2f66ec 100644
--- a/include/qemu/osdep.h
+++ b/include/qemu/osdep.h
@@ -777,16 +777,12 @@ size_t qemu_get_host_physmem(void);
     MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_VERSION_11_0
 static inline void qemu_thread_jit_execute(void)
 {
-    if (__builtin_available(macOS 11.0, *)) {
-        pthread_jit_write_protect_np(true);
-    }
+    pthread_jit_write_protect_np(true);
 }
 
 static inline void qemu_thread_jit_write(void)
 {
-    if (__builtin_available(macOS 11.0, *)) {
-        pthread_jit_write_protect_np(false);
-    }
+    pthread_jit_write_protect_np(false);
 }
 #else
 static inline void qemu_thread_jit_write(void) {}
-- 
2.34.1