Attachment #535532 for bug #655616




    struct {
        uint64_t *v;
    } x;
    return (int)__atomic_load_n(x.v, __ATOMIC_ACQUIRE) &
        (int)__atomic_add_fetch(x.v, (uint64_t)1, __ATOMIC_ACQ_REL);
}]])], GCC_ATOMIC_BUILTINS_SUPPORTED=yes, GCC_ATOMIC_BUILTINS_SUPPORTED=no)

dnl If that didn't work, we try linking with -latomic, which is needed on some

        struct {
            uint64_t *v;
        } x;
        return (int)__atomic_load_n(x.v, __ATOMIC_ACQUIRE) &
            (int)__atomic_add_fetch(x.v, (uint64_t)1, __ATOMIC_ACQ_REL);
   }]])], GCC_ATOMIC_BUILTINS_SUPPORTED=yes LIBATOMIC_LIBS="-latomic",
          GCC_ATOMIC_BUILTINS_SUPPORTED=no)
   LDFLAGS=$save_LDFLAGS

Lines 836-842 Link Here

(-)mesa-18.1.1/meson.build (-2 / +3 lines)
836	# Check for GCC style atomics	836	# Check for GCC style atomics
837	dep_atomic = null_dep	837	dep_atomic = null_dep
838		838
839	if cc.compiles('int main() { int n; return __atomic_load_n(&n, __ATOMIC_ACQUIRE); }',	839	if cc.compiles('int main() { int n; return __atomic_load_n(&n, __ATOMIC_ACQUIRE) & __atomic_add_fetch(&n, 1, __ATOMIC_ACQ_REL); }',
840	name : 'GCC atomic builtins')	840	name : 'GCC atomic builtins')
841	pre_args += '-DUSE_GCC_ATOMIC_BUILTINS'	841	pre_args += '-DUSE_GCC_ATOMIC_BUILTINS'
842		842
Lines 851-857 Link Here
851	struct {	851	struct {
852	uint64_t *v;	852	uint64_t *v;
853	} x;	853	} x;
854	return (int)__atomic_load_n(x.v, __ATOMIC_ACQUIRE);	854	return (int)__atomic_load_n(x.v, __ATOMIC_ACQUIRE) &
		855	__atomic_add_fetch(&n, 1, __ATOMIC_ACQ_REL);
855	}''',	856	}''',
856	name : 'GCC atomic builtins required -latomic')	857	name : 'GCC atomic builtins required -latomic')
857	dep_atomic = cc.find_library('atomic')	858	dep_atomic = cc.find_library('atomic')

Return to bug 655616

Lines 442-448 Link Here

(-)mesa-18.1.1/configure.ac (-2 / +4 lines)
442	struct {	442	struct {
443	uint64_t *v;	443	uint64_t *v;
444	} x;	444	} x;
445	return (int)__atomic_load_n(x.v, __ATOMIC_ACQUIRE);	445	return (int)__atomic_load_n(x.v, __ATOMIC_ACQUIRE) &
		446	(int)__atomic_add_fetch(x.v, (uint64_t)1, __ATOMIC_ACQ_REL);
446	}]])], GCC_ATOMIC_BUILTINS_SUPPORTED=yes, GCC_ATOMIC_BUILTINS_SUPPORTED=no)	447	}]])], GCC_ATOMIC_BUILTINS_SUPPORTED=yes, GCC_ATOMIC_BUILTINS_SUPPORTED=no)
447		448
448	dnl If that didn't work, we try linking with -latomic, which is needed on some	449	dnl If that didn't work, we try linking with -latomic, which is needed on some
Lines 456-462 Link Here
456	struct {	457	struct {
457	uint64_t *v;	458	uint64_t *v;
458	} x;	459	} x;
459	return (int)__atomic_load_n(x.v, __ATOMIC_ACQUIRE);	460	return (int)__atomic_load_n(x.v, __ATOMIC_ACQUIRE) &
		461	(int)__atomic_add_fetch(x.v, (uint64_t)1, __ATOMIC_ACQ_REL);
460	}]])], GCC_ATOMIC_BUILTINS_SUPPORTED=yes LIBATOMIC_LIBS="-latomic",	462	}]])], GCC_ATOMIC_BUILTINS_SUPPORTED=yes LIBATOMIC_LIBS="-latomic",
461	GCC_ATOMIC_BUILTINS_SUPPORTED=no)	463	GCC_ATOMIC_BUILTINS_SUPPORTED=no)
462	LDFLAGS=$save_LDFLAGS	464	LDFLAGS=$save_LDFLAGS