https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93151
--- Comment #11 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-9 branch has been updated by Jonathan Wakely <r...@gcc.gnu.org>: https://gcc.gnu.org/g:740e1ae17770d8e4829714c689f5471d235184b7 commit r9-10062-g740e1ae17770d8e4829714c689f5471d235184b7 Author: Jonathan Wakely <jwak...@redhat.com> Date: Thu Dec 17 13:27:04 2020 +0000 libstdc++: Test errno macros directly for all targets [PR 93151] This applies the same changes to the djgpp and mingw versions of error_constants.h as r11-6137 did for the generic version. All of these constants are defined as macros by <errno.h> on these targets, so we can just test the macro directly instead of checking for it at configure time. libstdc++-v3/ChangeLog: PR libstdc++/93151 * config/os/djgpp/error_constants.h: Test POSIX errno macros directly, instead of corresponding _GLIBCXX_HAVE_EXXX macros. * config/os/mingw32-w64/error_constants.h: Likewise. * config/os/mingw32/error_constants.h: Likewise. (cherry picked from commit 217d5beaff9987a9845155fc796322b5f8bb876d)