libgcc11 @11.1.0: Fails to build on 12.0 Monterey under arm64

[mpbarlow (Matt Barlow)]

arm64 is still using 11.1.0 instead of 11.2.0 used on x86_64, but building under Monterey fails with the following error:

:info:build checking whether we are cross compiling... configure: error: in `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_gcc11/libgcc11/work/build/arm64-apple-darwin21/libgomp':
:info:build configure: error: cannot run C compiled programs.
:info:build If you meant to cross compile, use `--host'.

I believe this is a different issue to #63691 and #63677 which appear to be x86_64 specific.

[ryandesign (Ryan Carsten Schmidt)]

Please attach the main.log and config.log files.

[mpbarlow (Matt Barlow)]

I've attached config.log, but the full main.log is 63MB, so I've uploaded a truncated version from what I believe is the start of the step that fails onwards.

Please let me know if there's anything more required.

[joshin42]

I'm seeing the same issue as Matt.

[mpbarlow (Matt Barlow)]

I have found a workaround. The error in config.log is that it cannot find /usr/lib/libgcc_s.1.1.dylib or /usr/local/lib/libgcc_s.1.1.dylib. However, this file is present in the work directory for the port, so after the install failed I ran

sudo cp /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_gcc11/libgcc11/work/build/arm64-apple-darwin21/libgcc/libgcc_s.1.1.dylib /usr/local/lib

After that the port built without issue—hopefully there are no further implications from doing this.

[ednl (Ewoud Dronkert)]

Replying to mpbarlow:

I have found a workaround. The error in config.log is that it cannot find /usr/lib/libgcc_s.1.1.dylib or /usr/local/lib/libgcc_s.1.1.dylib.

Aha! So I guess the fix would be to replace that /usr/local/lib search path with /opt/local/lib, or add that? Because yeah, I don't think MacPorts should dump stuff in /usr/local/lib.

[Guymer (Thomas Guymer)]

I have just come across this issue too. I first had to make "/usr/local/lib" as it was missing on my fresh install of Monterey, but after that it worked fine.

[QYQSDTC (YiQian Qian)]

I have this issue too. After I upgraded my M1 Mac Mini last night and did the migration stuff, I encountered this problem, but it seems libgcc-devel works fine, so I am using libgcc-devel as a temporary solution and waiting for the fix for libgcc11 and gcc11.

[cjones051073 (Chris Jones)]

Closing as duplicate of ​https://trac.macports.org/ticket/63677