Originally reported downstream in Gentoo: https://bugs.gentoo.org/832140
```
/var/tmp/portage/sys-libs/llvm-libunwind-13.0.0/work/libunwind/src/libunwind.cpp:77:3: error: #error Architecture not supported
77 | # error Architecture not supported
| ^~~~~
[...]
/var/tmp/portage/sys-libs/llvm-libunwind-13.0.0/work/libunwind/src/libunwind.cpp: In function ‘int __unw_init_local(unw_cursor_t*, unw_context_t*)’:
/var/tmp/portage/sys-libs/llvm-libunwind-13.0.0/work/libunwind/src/libunwind.cpp:80:57: error: ‘REGISTER_KIND’ was not declared in this scope
80 | new (reinterpret_cast<UnwindCursor<LocalAddressSpace, REGISTER_KIND> *>(cursor))
| ^~~~~~~~~~~~~
[...]
```
PPC is actually a supported architecture, but GCC (tested with 11.2.0)
on powerpc32 seems to only define: `__PPC__, _ARCH_PPC, __PPC,
__powerpc` and //not// `__ppc__`.
This instead uses `__powerpc__` which should be around on PPC32
and PPC64 (but we check it after PPC64, so it's fine).
Signed-off-by: Sam James <sam@gentoo.org>
Differential Revision: https://reviews.llvm.org/D118320
# define _LIBUNWIND_CONTEXT_SIZE 167
# define _LIBUNWIND_CURSOR_SIZE 179
# define _LIBUNWIND_HIGHEST_DWARF_REGISTER _LIBUNWIND_HIGHEST_DWARF_REGISTER_PPC64
-# elif defined(__ppc__)
+# elif defined(__powerpc__)
# define _LIBUNWIND_TARGET_PPC 1
# define _LIBUNWIND_CONTEXT_SIZE 117
# define _LIBUNWIND_CURSOR_SIZE 124
PPC64_LR(3)
bctr
-#elif defined(__ppc__)
+#elif defined(__powerpc__)
DEFINE_LIBUNWIND_FUNCTION(_ZN9libunwind13Registers_ppc6jumptoEv)
//
DEFINE_LIBUNWIND_FUNCTION(__unw_getcontext)
teq $0, $0
-#elif defined(__powerpc64__)
+#elif defined(__powerpc__)
//
// extern int __unw_getcontext(unw_context_t* thread_state)
blr
-#elif defined(__ppc__)
+#elif defined(__powerpc__)
//
// extern int unw_getcontext(unw_context_t* thread_state)
#endif
#endif /* __arm__ */
-#if defined(__ppc__) || defined(__powerpc64__)
+#if defined(__powerpc__)
#define PPC_LEFT_SHIFT(index) << (index)
#endif
#define _LIBUNWIND_BUILD_SJLJ_APIS
#endif
-#if defined(__i386__) || defined(__x86_64__) || defined(__ppc__) || defined(__ppc64__) || defined(__powerpc64__)
+#if defined(__i386__) || defined(__x86_64__) || defined(__powerpc__)
#define _LIBUNWIND_SUPPORT_FRAME_APIS
#endif
# define REGISTER_KIND Registers_x86_64
#elif defined(__powerpc64__)
# define REGISTER_KIND Registers_ppc64
-#elif defined(__ppc__)
+#elif defined(__powerpc__)
# define REGISTER_KIND Registers_ppc
#elif defined(__aarch64__)
# define REGISTER_KIND Registers_arm64