https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119590
Bug ID: 119590
Summary: macOS 15.4 SDK is not GCC compatible
Product: gcc
Version: 15.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: fxcoudert at gcc dot gnu.org
Target Milestone: ---
Original report there: https://github.com/GMAO-SI-Team/geosesm-spack/issues/2
/Library/Developer/CommandLineTools/SDKs/MacOSX15.sdk/usr/include/mach/arm/_structs.h:645:26:
error: '_Alignof' was not declared in this scope
645 | } __attribute__((aligned(_Alignof(unsigned int))));
| ^~~~~~~~
gmake[5]: *** [Makefile:1935:
aarch64-apple-darwin24/bits/stdc++.h.gch/O2ggnu++0x.gch] Error 1
The diff with the previous header (from the macOS 15.2 SDK), which was working:
---
/Library/Developer/CommandLineTools/SDKs/MacOSX15.2.sdk/usr/include/mach/arm/_structs.h
2024-11-16 04:37:26
+++
/Library/Developer/CommandLineTools/SDKs/MacOSX15.4.sdk/usr/include/mach/arm/_structs.h
2025-03-16 02:29:36
@@ -609,8 +609,74 @@ _STRUCT_ARM_PAGEIN_STATE
_STRUCT_ARM_PAGEIN_STATE
{
int __pagein_error;
+};
+
+#if __DARWIN_UNIX03
+#define _STRUCT_ARM_SME_STATE struct __darwin_arm_sme_state
+_STRUCT_ARM_SME_STATE
+{
+ __uint64_t __svcr;
+ __uint64_t __tpidr2_el0;
+ __uint16_t __svl_b;
+};
+
+#define _STRUCT_ARM_SVE_Z_STATE struct __darwin_arm_sve_z_state
+_STRUCT_ARM_SVE_Z_STATE
+{
+ char __z[16][256];
+} __attribute__((aligned(_Alignof(unsigned int))));
+
+#define _STRUCT_ARM_SVE_P_STATE struct __darwin_arm_sve_p_state
+_STRUCT_ARM_SVE_P_STATE
+{
+ char __p[16][256 / 8];
+} __attribute__((aligned(_Alignof(unsigned int))));
+
+#define _STRUCT_ARM_SME_ZA_STATE struct __darwin_arm_sme_za_state
+_STRUCT_ARM_SME_ZA_STATE
+{
+ char __za[4096];
+} __attribute__((aligned(_Alignof(unsigned int))));
+
+#define _STRUCT_ARM_SME2_STATE struct __darwin_arm_sme2_state
+_STRUCT_ARM_SME2_STATE
+{
+ char __zt0[64];
+} __attribute__((aligned(_Alignof(unsigned int))));
+#else /* !__DARWIN_UNIX03 */
+#define _STRUCT_ARM_SME_STATE struct arm_sme_state
+_STRUCT_ARM_SME_STATE
+{
+ __uint64_t svcr;
+ __uint64_t tpidr2_el0;
+ __uint16_t svl_b;
};
+#define _STRUCT_ARM_SVE_Z_STATE struct arm_sve_z_state
+_STRUCT_ARM_SVE_Z_STATE
+{
+ char z[16][256];
+} __attribute__((aligned(_Alignof(unsigned int))));
+
+#define _STRUCT_ARM_SVE_P_STATE struct arm_sve_p_state
+_STRUCT_ARM_SVE_P_STATE
+{
+ char p[16][256 / 8];
+} __attribute__((aligned(_Alignof(unsigned int))));
+
+#define _STRUCT_ARM_SME_ZA_STATE struct arm_sme_za_state
+_STRUCT_ARM_SME_ZA_STATE
+{
+ char za[4096];
+} __attribute__((aligned(_Alignof(unsigned int))));
+
+#define _STRUCT_ARM_SME2_STATE struct arm_sme2_state
+_STRUCT_ARM_SME2_STATE
+{
+ char zt0[64];
+} __attribute__((aligned(_Alignof(unsigned int))));
+#endif /* __DARWIN_UNIX03 */
+
/*
* Debug State
*/
