I would like to patch this patch from September 2023: https://gcc.gnu.org/pipermail/gcc-patches/2023-September/631611.html
This bug is now hitting macOS in the latest version of Xcode (it was originally seen on freebsd). I confirm that the patch is restoring bootstrap on x86_64-apple-darwin23 OK to push? FX > Ref: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111632 > > When building gcc's C++ sources against recent libc++, the poisoning of > the ctype macros due to including safe-ctype.h before including C++ > standard headers such as <list>, <map>, etc, causes many compilation > errors, similar to: > > In file included from /home/dim/src/gcc/master/gcc/gensupport.cc:23: > In file included from /home/dim/src/gcc/master/gcc/system.h:233: > In file included from /usr/include/c++/v1/vector:321: > In file included from > /usr/include/c++/v1/__format/formatter_bool.h:20: > In file included from > /usr/include/c++/v1/__format/formatter_integral.h:32: > In file included from /usr/include/c++/v1/locale:202: > /usr/include/c++/v1/__locale:546:5: error: '__abi_tag__' attribute > only applies to structs, variables, functions, and namespaces > 546 | _LIBCPP_INLINE_VISIBILITY > | ^ > /usr/include/c++/v1/__config:813:37: note: expanded from macro > '_LIBCPP_INLINE_VISIBILITY' > 813 | # define _LIBCPP_INLINE_VISIBILITY _LIBCPP_HIDE_FROM_ABI > | ^ > /usr/include/c++/v1/__config:792:26: note: expanded from macro > '_LIBCPP_HIDE_FROM_ABI' > 792 | > __attribute__((__abi_tag__(_LIBCPP_TOSTRING( > _LIBCPP_VERSIONED_IDENTIFIER)))) > | ^ > In file included from /home/dim/src/gcc/master/gcc/gensupport.cc:23: > In file included from /home/dim/src/gcc/master/gcc/system.h:233: > In file included from /usr/include/c++/v1/vector:321: > In file included from > /usr/include/c++/v1/__format/formatter_bool.h:20: > In file included from > /usr/include/c++/v1/__format/formatter_integral.h:32: > In file included from /usr/include/c++/v1/locale:202: > /usr/include/c++/v1/__locale:547:37: error: expected ';' at end of > declaration list > 547 | char_type toupper(char_type __c) const > | ^ > /usr/include/c++/v1/__locale:553:48: error: too many arguments > provided to function-like macro invocation > 553 | const char_type* toupper(char_type* __low, const > char_type* __high) const > | ^ > /home/dim/src/gcc/master/gcc/../include/safe-ctype.h:146:9: note: > macro 'toupper' defined here > 146 | #define toupper(c) do_not_use_toupper_with_safe_ctype > | ^ > > This is because libc++ uses different transitive includes than > libstdc++, and some of those transitive includes pull in various ctype > declarations (typically via <locale>). > > There was already a special case for including <string> before > safe-ctype.h, so move the rest of the C++ standard header includes to > the same location, to fix the problem. >
