Hello,
gcc from relocatable pack does not work. Can be reproduced as follows:
1. Make a relocatable pack:
$ guix time-machine -q --commit=59e6eae6e579b7edcac20390eb321b92f3405f61 --
pack -RS/xxetc=etc gcc-toolchain
/gnu/store/gdwhzaa5fyrcky6nlbdmczj1p7y1y88k-gcc-toolchain-tarball-pack.tar.gz
2. Switch to a directory and copy it there:
$ mkdir /tmp/fff
$ cd /tmp/fff
$ cp
/gnu/store/gdwhzaa5fyrcky6nlbdmczj1p7y1y88k-gcc-toolchain-tarball-pack.tar.gz
pack.tar.gz
3. Start a container with the directory mounted:
$ guix shell podman -- podman run --rm -it --mount type=bind,src=.,dst=/x
docker.io/library/alpine:3.24
Trying to pull docker.io/library/alpine:3.24...
Getting image source signatures
Copying blob 55afa1ecc21d done |
Copying config d529dd0c6e done |
Writing manifest to image destination
/ #
4. In the container unpack the archive and source the profile:
# tar -xvf /x/pack.tar.gz
# . xxetc/profile
5. Verify gcc starts:
# gcc --version
gcc (GCC) 16.1.0
Copyright (C) 2026 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
6. Create file and try to compile it:
# echo 'int main(){}' >a.c
# gcc a.c
gcc: fatal error: cannot execute 'cc1': posix_spawnp: No such file or
directory
compilation terminated.
As you can see, the compilation fails. If you do the same steps with pack
created without the -R, the compilation works.
Have a nice day,
Tomas
--
There are only two hard things in Computer Science:
cache invalidation, naming things and off-by-one errors.
