More detailed compile-time testing before attempting to use atomic load

intrinsics. See [forum:/forumpost/fc0237a39b30ac0a|forum post fc0237a39b30ac0a]. FossilOrigin-Name: 5204c2c4a7b73a64764b0d2d1d7c53709bb64e0d2685a829c7bf31af13bab5e7
2021-01-09 18:24:33 +00:00
parent 1242c0ccf4
commit 4ee492f176
3 changed files with 9 additions and 8 deletions
@@ -214,7 +214,8 @@
 #ifndef __has_extension
 # define __has_extension(x) 0     /* compatibility with non-clang compilers */
 #endif
-#if GCC_VERSION>=4007000 || __has_extension(c_atomic)
+#if GCC_VERSION>=4007000 || \
+    (__has_extension(c_atomic) && __has_extension(c_atomic_store_n))
 # define AtomicLoad(PTR)       __atomic_load_n((PTR),__ATOMIC_RELAXED)
 # define AtomicStore(PTR,VAL)  __atomic_store_n((PTR),(VAL),__ATOMIC_RELAXED)
 #else