Status of ga68 in recent O/S package systems, and local builds

[Pietro Monteiro]

On Thu, May 28, 2026, at 7:19 PM, Pietro Monteiro wrote:
> On Wed, May 27, 2026, at 1:35 PM, Pietro Monteiro wrote:
>> On Mon, May 25, 2026, at 2:12 PM, Nelson H. F. Beebe wrote:
>>> This note reports O/S package systems that now include ga68:
>
>
>>> A gcc-17 build attempt on OpenBSD 7.9, released 19-May-2026, failed to
>>> build ga68: the native gcc compiler is version 15.2.0 (a big jump from
>>> the gcc-8.4.0 on OpenBSD 7.8), but alas, there is no corresponding g++
>>> compiler.  Attempts to use clang-19, clang-20, and clang-21 to build
>>> compilers from the gcc-17-20260517 snapshot on that system have all
>>> failed; it appears that a version of a genuine older g++ compiler is
>>> needed to build a current g++.
>>
>> It should be possible to use clang to build GCC. I'll try it on an
>> OpenBSD host in the cfarm project machines and report back.
>
> My build failed too, and in a weird way. With both clang and gcc/g++ 15
>  It looks like others have noticed it too:
>
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97527

Ok, so after bumping the ulimit I was able to make some progress. Since
OpenBSD doesn't use GCC as its default compiler anymore, the support for
it has bitrotted. I guess the GCC ports package has patches that weren't
upstreamed. I posted some non-ga68 patches that let me successfully
build GCC on OpenBSD. All but one were reviewed/approved, and I pushed
them to trunk. The one that wasn't committed is pretty easy to work
around.

The workaround is disabling GCC's fixincludes. There are other configure
options I had to use to get the compiler to build/run. There are still
some test failures, but I haven't had time to dig into them yet.

The configure options I used were:

../gcc/configure \
  --disable-fixincludes \
  --disable-multilib \
  --disable-nls \
  --with-system-zlib \
  --with-as=/usr/local/bin/gas \
  --with-gnu-ld \
  --with-gnu-as \
  --enable-languages=algol68,c,c++ \
  --enable-standard-branch-protection \
  --enable-default-ssp \
  --enable-default-pie \
  --enable-host-pie \
  --enable-host-bind-now \
  --enable-wchar_t \
  --enable-threads=posix \
  --prefix=/home/pietro/gcc-test

Pietro