https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112863
--- Comment #4 from Rainer Orth <ro at gcc dot gnu.org> ---
On macOS 11, everything is still fine. On macOS 14, there's progress:
* Before your patch:
=== obj-c++ Summary ===
# of expected passes 2813
# of unexpected failures 378
# of expected failures 22
# of unsupported tests 71
* With the patch:
# of expected passes 3127
# of unexpected failures 72
# of expected failures 22
# of unsupported tests 71
The remaining failures fall into two categories:
FAIL: obj-c++.dg/encode-10.mm -fgnu-runtime (test for excess errors)
FAIL: obj-c++.dg/encode-9.mm -fgnu-runtime (test for excess errors)
FAIL: obj-c++.dg/encode-10.mm -fnext-runtime (test for excess errors)
FAIL: obj-c++.dg/encode-9.mm -fnext-runtime (test for excess errors)
FAIL: obj-c++.dg/torture/strings/const-cfstring-3.mm -O0 -fnext-runtime
-Wno-objc-root-class (test for excess errors)
Those are all instances of
Excess errors:
ld: warning: ignoring duplicate libraries: '-lobjc-gnu'
or
ld: warning: ignoring duplicate libraries: '-lobjc'
The remaining ones are all execution errors with -fnext-runtime. E.g.
obj-c++.dg/basic.mm SEGVs like
thread #1, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS
(code=1, address=0x20)
frame #0: 0x00007ff819069f58 libobjc.A.dylib`readClass(objc_class*, bool,
bool) + 35
libobjc.A.dylib`readClass:
-> 0x7ff819069f58 <+35>: movq 0x20(%rdi), %rcx
0x7ff819069f5c <+39>: movq %rcx, %rax
0x7ff819069f5f <+42>: andq %r15, %rax
0x7ff819069f62 <+45>: testq %rcx, %rcx
Target 0: (basic.exe) stopped.
(lldb) bt
* thread #1, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS
(code=1, address=0x20)
* frame #0: 0x00007ff819069f58 libobjc.A.dylib`readClass(objc_class*, bool,
bool) + 35
frame #1: 0x00007ff819059ded libobjc.A.dylib`map_images_nolock + 3856
frame #2: 0x00007ff819058e62 libobjc.A.dylib`map_images + 69
frame #3: 0x00007ff8190adc0f dyld`invocation function for block in
dyld4::RuntimeState::setObjCNotifiers(void (*)(unsigned int, char const*
const*, mach_header const* const*), void (*)(char const*, mach_header const*),
void (*)(char const*, mach_header const*), void (*)(mach_header const*, void*,
mach_header const*, void const*), void (*)(unsigned int,
_dyld_objc_notify_mapped_info const*), void (*)(_dyld_objc_notify_mapped_info
const*))::$_8::operator()() const + 682
frame #4: 0x00007ff8190a59cc
dyld`dyld4::RuntimeLocks::withLoadersReadLock(void () block_pointer) + 46
frame #5: 0x00007ff8190aac13
dyld`dyld4::RuntimeState::setObjCNotifiers(void (*)(unsigned int, char const*
const*, mach_header const* const*), void (*)(char const*, mach_header const*),
void (*)(char const*, mach_header const*), void (*)(mach_header const*, void*,
mach_header const*, void const*), void (*)(unsigned int,
_dyld_objc_notify_mapped_info const*), void (*)(_dyld_objc_notify_mapped_info
const*)) + 223
frame #6: 0x00007ff8190d0960
dyld`dyld4::APIs::_dyld_objc_register_callbacks(_dyld_objc_callbacks const*) +
152
frame #7: 0x00007ff8190588e4 libobjc.A.dylib`_objc_init + 675
frame #8: 0x00007ff819281c00 libdispatch.dylib`_os_object_init + 13
frame #9: 0x00007ff81928edf6 libdispatch.dylib`libdispatch_init + 364
frame #10: 0x00007ff8262ef892 libSystem.B.dylib`libSystem_initializer + 222
frame #11: 0x00007ff8190b7fca dyld`invocation function for block in
dyld4::Loader::findAndRunAllInitializers(dyld4::RuntimeState&)
const::$_0::operator()() const + 182
frame #12: 0x00007ff8190f971f dyld`invocation function for block in
dyld3::MachOAnalyzer::forEachInitializer(Diagnostics&,
dyld3::MachOAnalyzer::VMAddrConverter const&, void (unsigned int)
block_pointer, void const*) const + 241
frame #13: 0x00007ff8190ed913 dyld`invocation function for block in
dyld3::MachOFile::forEachSection(void (dyld3::MachOFile::SectionInfo const&,
bool, bool&) block_pointer) const + 543
frame #14: 0x00007ff81909b07f
dyld`dyld3::MachOFile::forEachLoadCommand(Diagnostics&, void (load_command
const*, bool&) block_pointer) const + 249
frame #15: 0x00007ff8190ecadc dyld`dyld3::MachOFile::forEachSection(void
(dyld3::MachOFile::SectionInfo const&, bool, bool&) block_pointer) const + 176
frame #16: 0x00007ff8190f930a
dyld`dyld3::MachOAnalyzer::forEachInitializer(Diagnostics&,
dyld3::MachOAnalyzer::VMAddrConverter const&, void (unsigned int)
block_pointer, void const*) const + 470
frame #17: 0x00007ff8190b4cfc
dyld`dyld4::Loader::findAndRunAllInitializers(dyld4::RuntimeState&) const + 222
frame #18: 0x00007ff8190be0ae
dyld`dyld4::PrebuiltLoader::runInitializers(dyld4::RuntimeState&) const + 30
frame #19: 0x00007ff8190d6878 dyld`dyld4::APIs::runAllInitializersForMain()
+ 72
frame #20: 0x00007ff8190a0241 dyld`dyld4::prepare(dyld4::APIs&,
dyld3::MachOAnalyzer const*) + 3397
frame #21: 0x00007ff81909f31f dyld`start + 1839
