[zig cc] -target x86_64-linux-gnu failure to find -lgomp (or -lomp)

[henderkes]

Zig Version

0.15-dev

Steps to Reproduce and Observed Behavior

Like in the other issues, use static-php-cli to easily build php and frankenphp.

bin/spc pkg-install go-xcaddy
bin/spc download -e bcmath
bin/spc build bcmath --enable-zts --build-frankenphp

Expected Behavior

builds correctly.

Actual behaviour:

php-cli builds correctly, but the frankenphp build fails.
First off, it doesn't know about /usr/lib64 as a system search path (?) and second, when adding -L/usr/lib64:

error: unable to find dynamic system library 'gomp' using strategy 'paths_first'. searched paths:
  /home/m/static-php-cli/buildroot/lib/libgomp.so
  /home/m/static-php-cli/buildroot/lib/libgomp.a
  /usr/lib64/libgomp.so
  /usr/lib64/libgomp.a
  /home/m/static-php-cli/buildroot/lib/libgomp.so
  /home/m/static-php-cli/buildroot/lib/libgomp.a
  /usr/lib64/libgomp.so
  /usr/lib64/libgomp.a
  /usr/local/lib/libgomp.so
  /usr/local/lib/libgomp.a
  /usr/lib/libgomp.so
  /usr/lib/libgomp.a
  /home/m/static-php-cli/buildroot/lib/libgomp.so
  /home/m/static-php-cli/buildroot/lib/libgomp.a
  /usr/lib64/libgomp.so
  /usr/lib64/libgomp.a
  /home/m/static-php-cli/buildroot/lib/libgomp.so
  /home/m/static-php-cli/buildroot/lib/libgomp.a
  /usr/lib64/libgomp.so
  /usr/lib64/libgomp.a
  /home/m/static-php-cli/buildroot/lib/libgomp.so
  /home/m/static-php-cli/buildroot/lib/libgomp.a
  /usr/lib64/libgomp.so
  /usr/lib64/libgomp.a
  /home/m/static-php-cli/buildroot/lib/libgomp.so
  /home/m/static-php-cli/buildroot/lib/libgomp.a
  /usr/lib64/libgomp.so
  /usr/lib64/libgomp.a
  /home/m/static-php-cli/buildroot/lib/libgomp.so
  /home/m/static-php-cli/buildroot/lib/libgomp.a
  /usr/lib64/libgomp.so
  /usr/lib64/libgomp.a
error: unable to find dynamic system library 'gomp' using strategy 'paths_first'. searched paths:
  /home/m/static-php-cli/buildroot/lib/libgomp.so
  /home/m/static-php-cli/buildroot/lib/libgomp.a
  /usr/lib64/libgomp.so
  /usr/lib64/libgomp.a
  /home/m/static-php-cli/buildroot/lib/libgomp.so
  /home/m/static-php-cli/buildroot/lib/libgomp.a
  /usr/lib64/libgomp.so
  /usr/lib64/libgomp.a
  /usr/local/lib/libgomp.so
  /usr/local/lib/libgomp.a
  /usr/lib/libgomp.so
  /usr/lib/libgomp.a
  /home/m/static-php-cli/buildroot/lib/libgomp.so
  /home/m/static-php-cli/buildroot/lib/libgomp.a
  /usr/lib64/libgomp.so
  /usr/lib64/libgomp.a
  /home/m/static-php-cli/buildroot/lib/libgomp.so
  /home/m/static-php-cli/buildroot/lib/libgomp.a
  /usr/lib64/libgomp.so
  /usr/lib64/libgomp.a
  /home/m/static-php-cli/buildroot/lib/libgomp.so
  /home/m/static-php-cli/buildroot/lib/libgomp.a
  /usr/lib64/libgomp.so
  /usr/lib64/libgomp.a
  /home/m/static-php-cli/buildroot/lib/libgomp.so
  /home/m/static-php-cli/buildroot/lib/libgomp.a
  /usr/lib64/libgomp.so
  /usr/lib64/libgomp.a
  /home/m/static-php-cli/buildroot/lib/libgomp.so
  /home/m/static-php-cli/buildroot/lib/libgomp.a
  /usr/lib64/libgomp.so
  /usr/lib64/libgomp.a
error: unable to find dynamic system library 'gomp' using strategy 'paths_first'. searched paths:
  /home/m/static-php-cli/buildroot/lib/libgomp.so
  /home/m/static-php-cli/buildroot/lib/libgomp.a
  /usr/lib64/libgomp.so
  /usr/lib64/libgomp.a
  /home/m/static-php-cli/buildroot/lib/libgomp.so
  /home/m/static-php-cli/buildroot/lib/libgomp.a
  /usr/lib64/libgomp.so
  /usr/lib64/libgomp.a
  /usr/local/lib/libgomp.so
  /usr/local/lib/libgomp.a
  /usr/lib/libgomp.so
  /usr/lib/libgomp.a
  /home/m/static-php-cli/buildroot/lib/libgomp.so
  /home/m/static-php-cli/buildroot/lib/libgomp.a
  /usr/lib64/libgomp.so
  /usr/lib64/libgomp.a
  /home/m/static-php-cli/buildroot/lib/libgomp.so
  /home/m/static-php-cli/buildroot/lib/libgomp.a
  /usr/lib64/libgomp.so
  /usr/lib64/libgomp.a
  /home/m/static-php-cli/buildroot/lib/libgomp.so
  /home/m/static-php-cli/buildroot/lib/libgomp.a
  /usr/lib64/libgomp.so
  /usr/lib64/libgomp.a
  /home/m/static-php-cli/buildroot/lib/libgomp.so
  /home/m/static-php-cli/buildroot/lib/libgomp.a
  /usr/lib64/libgomp.so
  /usr/lib64/libgomp.a
  /home/m/static-php-cli/buildroot/lib/libgomp.so
  /home/m/static-php-cli/buildroot/lib/libgomp.a
  /usr/lib64/libgomp.so
  /usr/lib64/libgomp.a
error: unable to find dynamic system library 'gomp' using strategy 'paths_first'. searched paths:
  /home/m/static-php-cli/buildroot/lib/libgomp.so
  /home/m/static-php-cli/buildroot/lib/libgomp.a
  /usr/lib64/libgomp.so
  /usr/lib64/libgomp.a
  /home/m/static-php-cli/buildroot/lib/libgomp.so
  /home/m/static-php-cli/buildroot/lib/libgomp.a
  /usr/lib64/libgomp.so
  /usr/lib64/libgomp.a
  /usr/local/lib/libgomp.so
  /usr/local/lib/libgomp.a
  /usr/lib/libgomp.so
  /usr/lib/libgomp.a
  /home/m/static-php-cli/buildroot/lib/libgomp.so
  /home/m/static-php-cli/buildroot/lib/libgomp.a
  /usr/lib64/libgomp.so
  /usr/lib64/libgomp.a
  /home/m/static-php-cli/buildroot/lib/libgomp.so
  /home/m/static-php-cli/buildroot/lib/libgomp.a
  /usr/lib64/libgomp.so
  /usr/lib64/libgomp.a
  /home/m/static-php-cli/buildroot/lib/libgomp.so
  /home/m/static-php-cli/buildroot/lib/libgomp.a
  /usr/lib64/libgomp.so
  /usr/lib64/libgomp.a
  /home/m/static-php-cli/buildroot/lib/libgomp.so
  /home/m/static-php-cli/buildroot/lib/libgomp.a
  /usr/lib64/libgomp.so
  /usr/lib64/libgomp.a
  /home/m/static-php-cli/buildroot/lib/libgomp.so
  /home/m/static-php-cli/buildroot/lib/libgomp.a
  /usr/lib64/libgomp.so
  /usr/lib64/libgomp.a
error: unable to find dynamic system library 'gomp' using strategy 'paths_first'. searched paths:
  /home/m/static-php-cli/buildroot/lib/libgomp.so
  /home/m/static-php-cli/buildroot/lib/libgomp.a
  /usr/lib64/libgomp.so
  /usr/lib64/libgomp.a
  /home/m/static-php-cli/buildroot/lib/libgomp.so
  /home/m/static-php-cli/buildroot/lib/libgomp.a
  /usr/lib64/libgomp.so
  /usr/lib64/libgomp.a
  /usr/local/lib/libgomp.so
  /usr/local/lib/libgomp.a
  /usr/lib/libgomp.so
  /usr/lib/libgomp.a
  /home/m/static-php-cli/buildroot/lib/libgomp.so
  /home/m/static-php-cli/buildroot/lib/libgomp.a
  /usr/lib64/libgomp.so
  /usr/lib64/libgomp.a
  /home/m/static-php-cli/buildroot/lib/libgomp.so
  /home/m/static-php-cli/buildroot/lib/libgomp.a
  /usr/lib64/libgomp.so
  /usr/lib64/libgomp.a
  /home/m/static-php-cli/buildroot/lib/libgomp.so
  /home/m/static-php-cli/buildroot/lib/libgomp.a
  /usr/lib64/libgomp.so
  /usr/lib64/libgomp.a
  /home/m/static-php-cli/buildroot/lib/libgomp.so
  /home/m/static-php-cli/buildroot/lib/libgomp.a
  /usr/lib64/libgomp.so
  /usr/lib64/libgomp.a
  /home/m/static-php-cli/buildroot/lib/libgomp.so
  /home/m/static-php-cli/buildroot/lib/libgomp.a
  /usr/lib64/libgomp.so
  /usr/lib64/libgomp.a
error: unable to find dynamic system library 'gomp' using strategy 'paths_first'. searched paths:
  /home/m/static-php-cli/buildroot/lib/libgomp.so
  /home/m/static-php-cli/buildroot/lib/libgomp.a
  /usr/lib64/libgomp.so
  /usr/lib64/libgomp.a
  /home/m/static-php-cli/buildroot/lib/libgomp.so
  /home/m/static-php-cli/buildroot/lib/libgomp.a
  /usr/lib64/libgomp.so
  /usr/lib64/libgomp.a
  /usr/local/lib/libgomp.so
  /usr/local/lib/libgomp.a
  /usr/lib/libgomp.so
  /usr/lib/libgomp.a
  /home/m/static-php-cli/buildroot/lib/libgomp.so
  /home/m/static-php-cli/buildroot/lib/libgomp.a
  /usr/lib64/libgomp.so
  /usr/lib64/libgomp.a
  /home/m/static-php-cli/buildroot/lib/libgomp.so
  /home/m/static-php-cli/buildroot/lib/libgomp.a
  /usr/lib64/libgomp.so
  /usr/lib64/libgomp.a
  /home/m/static-php-cli/buildroot/lib/libgomp.so
  /home/m/static-php-cli/buildroot/lib/libgomp.a
  /usr/lib64/libgomp.so
  /usr/lib64/libgomp.a
  /home/m/static-php-cli/buildroot/lib/libgomp.so
  /home/m/static-php-cli/buildroot/lib/libgomp.a
  /usr/lib64/libgomp.so
  /usr/lib64/libgomp.a
  /home/m/static-php-cli/buildroot/lib/libgomp.so
  /home/m/static-php-cli/buildroot/lib/libgomp.a
  /usr/lib64/libgomp.so
  /usr/lib64/libgomp.a
error: unable to find dynamic system library 'gomp' using strategy 'paths_first'. searched paths:
  /home/m/static-php-cli/buildroot/lib/libgomp.so
  /home/m/static-php-cli/buildroot/lib/libgomp.a
  /usr/lib64/libgomp.so
  /usr/lib64/libgomp.a
  /home/m/static-php-cli/buildroot/lib/libgomp.so
  /home/m/static-php-cli/buildroot/lib/libgomp.a
  /usr/lib64/libgomp.so
  /usr/lib64/libgomp.a
  /usr/local/lib/libgomp.so
  /usr/local/lib/libgomp.a
  /usr/lib/libgomp.so
  /usr/lib/libgomp.a
  /home/m/static-php-cli/buildroot/lib/libgomp.so
  /home/m/static-php-cli/buildroot/lib/libgomp.a
  /usr/lib64/libgomp.so
  /usr/lib64/libgomp.a
  /home/m/static-php-cli/buildroot/lib/libgomp.so
  /home/m/static-php-cli/buildroot/lib/libgomp.a
  /usr/lib64/libgomp.so
  /usr/lib64/libgomp.a
  /home/m/static-php-cli/buildroot/lib/libgomp.so
  /home/m/static-php-cli/buildroot/lib/libgomp.a
  /usr/lib64/libgomp.so
  /usr/lib64/libgomp.a
  /home/m/static-php-cli/buildroot/lib/libgomp.so
  /home/m/static-php-cli/buildroot/lib/libgomp.a
  /usr/lib64/libgomp.so
  /usr/lib64/libgomp.a
  /home/m/static-php-cli/buildroot/lib/libgomp.so
  /home/m/static-php-cli/buildroot/lib/libgomp.a
  /usr/lib64/libgomp.so
  /usr/lib64/libgomp.a

The actual library is :

[m@M-TH ~]$ find /usr -name "libgomp*"
/usr/lib/gcc/x86_64-redhat-linux/14/libgomp.a
/usr/lib/gcc/x86_64-redhat-linux/14/libgomp.spec
/usr/lib/gcc/x86_64-redhat-linux/14/32/libgomp.a
/usr/lib/gcc/x86_64-redhat-linux/14/32/libgomp.so
/usr/lib/gcc/x86_64-redhat-linux/14/libgomp.so
/usr/share/doc/libgomp
/usr/share/info/libgomp.info.gz
find: ‘/usr/share/empty.sshd’: Permission denied
/usr/lib64/libgomp.so.1
/usr/lib64/libgomp.so.1.0.0

[henderkes]

For what it's worth, -lomp has the same problem, except that it's enough to specify -L/usr/lib64. If actually wanting to link against -lgomp, it's possible to replace -lgomp with /usr/lib64/libgomp.so.1 and it will link correctly.

[alexrp]

First off, it doesn't know about /usr/lib64 as a system search path (?)

Note that this part is expected; using -target without native is how you tell the Zig compiler that you want cross compilation.

[alexrp]

To be clear, it still sounds like there's a bug if the compiler is failing to find the library when you pass -L /usr/lib64.

[henderkes]

Oh you're right, I bandaid fixed that by str_replacing -lomp to /usr/lib64/libomp.so.

I believe it fails to find -lgomp because the file is called libomp.so.1 and there's no softlink to it. Since libgomp is specific to gcc I think this can be closed either way. -lomp is found when passing -L/usr/lib64.