Fix GH-20767: build failure with preserve_none attribute enabled on mac.

Established that build < 1700.4.4.1 tends to fail thus we disable the
preserve_none attribute feature for these cases.

close GH-20777

Author: devnexen

NEWS

@@ -2,7 +2,11 @@ PHP                                                                        NEWS
 |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 ?? ??? ????, PHP 8.5.3
 
-
+- Core:
+  . Fixed bug GH-20806 (preserve_none feature compatiblity with LTO).
+    (henderkes)
+  . Fixed bug GH-20767 (build failure with musttail/preserve_none feature
+    on macOs). (David Carlier)
 
 15 Jan 2026, PHP 8.5.2
 

Zend/zend_portability.h

@@ -336,9 +336,12 @@ char *alloca();
 # define ZEND_PRESERVE_NONE __attribute__((preserve_none))
 #endif
 
-#if __has_attribute(musttail)
-# define HAVE_MUSTTAIL
-# define ZEND_MUSTTAIL __attribute__((musttail))
+
+#if !defined(__apple_build_version__) || (defined(__apple_build_version__) && __apple_build_version__ >= 17000404)
+# if __has_attribute(musttail)
+#  define HAVE_MUSTTAIL
+#  define ZEND_MUSTTAIL __attribute__((musttail))
+# endif
 #endif
 
 #if (defined(__GNUC__) && __GNUC__ >= 3 && !defined(__INTEL_COMPILER) && !defined(__APPLE__) && !defined(__hpux) && !defined(_AIX) && !defined(__osf__)) || __has_attribute(noreturn)