On Fri, 17 Feb 2023, 15:17 -xlan- via Gcc, <gcc@gcc.gnu.org> wrote:

> I was building gcc version 4.9.1


Why?


on Mac OS version when I got this error:
>
> In file included from ../../gcc-4.9.1/gcc/c/c-objc-common.c:33:
> In file included from
>
> /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/c++/v1/new:93:
>
> /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/c++/v1/exception:184:5:
> error: no member named 'fancy_abort' in namespace 'std::__1'; did you mean
> simply 'fancy_abort'?
>     _VSTD::abort();
>     ^~~~~~~
>


The GCC sources define 'abort' as a macro, which appears to be incompatible
with LLVM's libc++.

You might be able to compile using -stdlib=libstdc++ instead.

/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/c++/v1/__config:858:15:
> note: expanded from macro '_VSTD'
> #define _VSTD std::_LIBCPP_ABI_NAMESPACE
>               ^
> ../../gcc-4.9.1/gcc/system.h:685:13: note: 'fancy_abort' declared here
> extern void fancy_abort (const char *, int, const char *)
> ATTRIBUTE_NORETURN;
>             ^
> 1 error generated.
> make[1]: *** [c/c-objc-common.o] Error 1
> make: *** [all-gcc] Error 2
>
> Mac OS: Monterey 12.6.4
>