New comment by pullmoll on void-packages repository

https://github.com/void-linux/void-packages/pull/24258#issuecomment-761187783

Comment:
In that case the `libiberty.h` should be removed from `gcc`. It may be just because of this header that packages are trying to link against `libiberty`.  I haven't verified that yet and am just reporting issues with the gcc 10 upate I find.

Output of `oprofile` configure for example:
```
checking libiberty.h usability... yes
checking libiberty.h presence... yes
checking for libiberty.h... yes
checking for cplus_demangle in -liberty... no
configure: error: liberty library not found
=> ERROR: oprofile-1.4.0_1: do_configure: '${configure_script} ${configure_args}' exited with 1
=> ERROR:   in do_configure() at common/build-style/gnu-configure.sh:7
```