[Bug modula2/113848] New: modula2 doesn't build with clang

[fkastl at suse dot cz via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113848

            Bug ID: 113848
           Summary: modula2 doesn't build with clang
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Keywords: build
          Severity: normal
          Priority: P3
         Component: modula2
          Assignee: gaius at gcc dot gnu.org
          Reporter: fkastl at suse dot cz
  Target Milestone: ---
              Host: x86_64-linux
            Target: x86_64-linux

Building GCC using clang with modula2 language enabled raises this error.

m2/gm2-libs-boot/SArgs.c:93:90: error: arithmetic on a pointer to void
   93 |       ppc = static_cast<SArgs_PtrToPtrToChar> ((void *) (((void *)
(UnixArgs_GetArgV ()))+(n*sizeof (SArgs_PtrToChar))));
      |                                                         
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^

This started happening between

g:fbb569315a291d2d5b32ad0fdaf0c42da9f5e93b and
g:260a22de4fa3d4ad3bb0d3ef2cd45d7f03eb3160

The only commit touching ./gcc/m2/gm2-libs/Sargs.{def,mod} is

g:64b0130bb6702c67a13caefaae9facef23d6ac60

so I suppose that's the culprit commit.


The build is configured using
--disable-multilib --disable-libsanitizer --disable-bootstrap
--with-system-zlib --enable-languages=c,c++,fortran,go,jit,lto,rust,m2
--enable-host-shared