[Bug libgcc/102601] [maybe not a bug] libgcc requires pthread.h even i use --disable-thread --without-headers --disable-shared

[unlvsur at live dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102601

--- Comment #1 from cqwrteur <unlvsur at live dot com> ---
In file included from ../../../../../../gcc/libgcc/gthr.h:148,
                 from ../../../../../../gcc/libgcc/libgcov-interface.c:27:
./gthr-default.h:35:10: fatal error: pthread.h: No such file or directory
   35 | #include <pthread.h>
      |          ^~~~~~~~~~~
compilation terminated.
In file included from ../../../../../../gcc/libgcc/gthr.h:148,
                 from ../../../../../../gcc/libgcc/libgcov-interface.c:27:
./gthr-default.h:35:10: fatal error: pthread.h: No such file or directory
   35 | #include <pthread.h>
      |          ^~~~~~~~~~~