build: add version-specific library path for AIX

[richardlau]

Add the version-specific directory containing the C/C++ runtime libraries to -blibpath on AIX. This will help link node against the correct libraries at run-time when compiled with a different version of the GNU C/C++ compiler without having to manually set a LIBPATH environment variable.

---

On current AIX 7.2 and 7.3, /opt/freeware/lib/pthread/ppc64 contains symbolic links to the gcc 10 version of the runtime libraries, e.g. for AIX 7.2:

# ls -al /opt/freeware/lib/pthread/ppc64
total 0
drwxr-xr-x    2 root     system          256 Mar 15 2023  .
drwxr-xr-x    3 root     system          256 Mar 15 2023  ..
lrwxrwxrwx    1 root     system           61 Mar 15 2023  libatomic.a -> ../../gcc/powerpc-ibm-aix7.2.0.0/10/pthread/ppc64/libatomic.a
lrwxrwxrwx    1 root     system           60 Mar 15 2023  libgcc_s.a -> ../../gcc/powerpc-ibm-aix7.2.0.0/10/pthread/ppc64/libgcc_s.a
lrwxrwxrwx    1 root     system           59 Mar 15 2023  libgomp.a -> ../../gcc/powerpc-ibm-aix7.2.0.0/10/pthread/ppc64/libgomp.a
lrwxrwxrwx    1 root     system           61 Mar 15 2023  libstdc++.a -> ../../gcc/powerpc-ibm-aix7.2.0.0/10/pthread/ppc64/libstdc++.a
#

i.e. the libraries are actually in /opt/freeware/lib/gcc/powerpc-ibm-aix7.2.0.0/10/pthread/ppc64 (note both the AIX version and gcc versions in the directory name -- on AIX 7.3 the equivalent is /opt/freeware/lib/gcc/powerpc-ibm-aix7.3.0.0/10/pthread/ppc64).

Installing a different version of gcc on the machine (e.g. gcc 12) installs the gcc 12 versions of the libraries (e.g. in /opt/freeware/lib/gcc/powerpc-ibm-aix7.2.0.0/12/pthread/ppc64) but leaves the symbolic links in /opt/freeware/lib/pthread/ppc64 pointing at the gcc 10 versions.

If compiled with gcc 12 with the current libpath settings, running node will throw an error similar to the following because it will be running against the gcc 10 version of libstdc++ (i.e. the one pointed to in /opt/freeware/lib/pthread/ppc64):

# ./node
Could not load program node:
rtld: 0712-001 Symbol _ZSt28__throw_bad_array_new_lengthv was referenced
      from module node(), but a runtime definition
            of the symbol was not found.
rtld: 0712-001 Symbol _ZNKRSt7__cxx1115basic_stringbufIcSt11char_traitsIcESaIcEE3strEv was referenced
      from module node(), but a runtime definition
            of the symbol was not found.
rtld: 0712-002 fatal error: exiting.
# 

This can be worked around by setting /opt/freeware/lib/gcc/powerpc-ibm-aix7.2.0.0/10/pthread/ppc64 in the LIBPATH environment variable.

Adding the version-specific directory (one for AIX 7.2 and one for AIX 7.3) to the libpath passed to the linker will allow node to link against the correct library at run-time without having to manually set a LIBPATH environment variable.

[nodejs-github-bot]

Review requested:

• @nodejs/gyp

[lpinca]

RSLGTM

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/59966/

[nodejs-github-bot]

Landed in f1db816