From: Akihiko Odaki <akihiko.od...@daynix.com>

macOS SDK may have the symbol of strchrnul(), but it is actually
available only on macOS 15.4 or later and that fact is codified in
string.h. Include the header file using osdep_prefix to check if the
function is available on the deployment target.

Cc: qemu-sta...@nongnu.org
Signed-off-by: Akihiko Odaki <akihiko.od...@daynix.com>
Reviewed-by: Philippe Mathieu-Daudé <phi...@linaro.org>
Tested-by: Philippe Mathieu-Daudé <phi...@linaro.org>
Message-ID: <20250424-buildsys-v1-4-97655e3b2...@daynix.com>
Signed-off-by: Philippe Mathieu-Daudé <phi...@linaro.org>
(cherry picked from commit a5b30be534538dc6e44a68ce9734e45dd08f52ec)
Signed-off-by: Michael Tokarev <m...@tls.msk.ru>

diff --git a/meson.build b/meson.build
index 0a35fc3fa9..8ec796d835 100644
--- a/meson.build
+++ b/meson.build
@@ -2193,6 +2193,7 @@ osdep_prefix = '''
   #include <stddef.h>
   #include <sys/types.h>
 
+  #include <string.h>
   #include <limits.h>
   /* Put unistd.h before time.h as that triggers localtime_r/gmtime_r
    * function availability on recentish Mingw-w64 platforms. */
@@ -2657,7 +2658,7 @@ config_host_data.set('HAVE_GETIFADDRS', 
cc.has_function('getifaddrs'))
 config_host_data.set('HAVE_GLIB_WITH_SLICE_ALLOCATOR', glib_has_gslice)
 config_host_data.set('HAVE_GLIB_WITH_ALIGNED_ALLOC', glib_has_aligned_alloc)
 config_host_data.set('HAVE_OPENPTY', cc.has_function('openpty', dependencies: 
util))
-config_host_data.set('HAVE_STRCHRNUL', cc.has_function('strchrnul'))
+config_host_data.set('HAVE_STRCHRNUL', cc.has_function('strchrnul', prefix: 
osdep_prefix))
 config_host_data.set('HAVE_SYSTEM_FUNCTION', cc.has_function('system', prefix: 
'#include <stdlib.h>'))
 if rbd.found()
   config_host_data.set('HAVE_RBD_NAMESPACE_EXISTS',
-- 
2.39.5


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