New comment by st3r4g on void-packages repository

https://github.com/void-linux/void-packages/pull/16392#issuecomment-552808381

Comment:
Some warnings due to `musl.patch`:
```
[14/366] Compiling C object 'benchmarks/cb1d2fd@@gem_syslatency@exe/gem_syslatency.c.o'.
../benchmarks/gem_syslatency.c: In function 'sys_wait':
../benchmarks/gem_syslatency.c:180:29: warning: assignment to 'void (*)(union sigval)' from 'int' makes pointer from integer without a cast [-Wint-conversion]
  180 |  sev.sigev_notify_thread_id = gettid();
      |                             ^
[52/366] Compiling C object 'lib/76b5a35@@igt-igt_aux_c@sta/igt_aux.c.o'.
../lib/igt_aux.c: In function 'igt_sigiter_start':
../lib/igt_aux.c:187:30: warning: assignment to 'void (*)(union sigval)' from 'pid_t' {aka 'int'} makes pointer from integer without a cast [-Wint-conversion]
  187 |   sev.sigev_notify_thread_id = __igt_sigiter.tid;
      |                              ^
../lib/igt_aux.c: In function 'igt_start_siglatency':
../lib/igt_aux.c:1615:29: warning: assignment to 'void (*)(union sigval)' from 'int' makes pointer from integer without a cast [-Wint-conversion]
 1615 |  sev.sigev_notify_thread_id = gettid();
      |                             ^
```
There's still the problem that the build sometimes hangs, tried adding `disable_parallel_build=yes` but no success. I could reach the end when manually chrooting though.