[Bug target/123504] [16 Regression] linking with COFF-format .res files does not work any more since r16-6121-ga7852981ce15a1

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123504

--- Comment #15 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jonathan Yong <jyong@gcc.gnu.org>:

https://gcc.gnu.org/g:da2229db8809d461cd483a22725d53694dcdfa1e

commit r16-6807-gda2229db8809d461cd483a22725d53694dcdfa1e
Author: Peter Damianov <peter0x44@disroot.org>
Date:   Sat Jan 10 09:19:54 2026 +0000

    Remove .res specs to fix COFF passthrough [PR123504]

    Some packages (gnulib) pass COFF object files with .res extension
    directly to gcc, expecting them to be passed through to the linker,
    instead of windres.  However, the current EXTRA_DEFAULT_COMPILERS spec
    intercepts all .res files and runs them through windres, which fails for
    COFF files that are not Windows resource files (Microsoft Visual C
    binary resource file as identified by libmagic/file).

    This patch removes the .res file specs, leaving only the .rc
    support specs active. At a later date, this can be reviewed.

    The driver could inspect the .res file to see if it's a object file or,
    but, it's somewhat questionable if handling .res is even useful.

    gcc/ChangeLog:

            PR driver/123504
            * config/i386/cygming.h (EXTRA_DEFAULT_COMPILERS): Comment out
            .res spec to allow COFF files with .res extension to pass
            through to the linker.
            * config/aarch64/cygming.h (EXTRA_DEFAULT_COMPILERS): Likewise.

    Signed-off-by: Jonathan Yong <10walls@gmail.com>