I am on an AIX 7.2 server and I installed the following RPMs 

libgcc10-10.3.0-6.ppc
libstdc++10-10.3.0-6.ppc

I then installed node 20.10.0 from Node.js

# ./node -v
Could not load program ./node:
        Dependent module libstdc++.a(libstdc++.so.6) could not be loaded.
Could not load module libstdc++.a(libstdc++.so.6).
System error: No such file or directory

Works fine on AIX 7.3 and node 20. Node 18 works fine with libstdc++ 8 on AIX 7.2. Issue is only on AIX 7.2 with libstdc++ 10 and node 20. If I set the LIBPATH to /opt/freeware/lib/gcc/powerpc-ibm-aix7.2.0.0/10/pthread/ppc64, it works

# ./node -v
v20.10.0

------------------------------
Mouni N
------------------------------

#AIXOpenSource

Hi Mouni,

I installed NodeJS 20 on one of my AIX 7.2 boxes now and don't have the problem.

# oslevel -s
7200-05-07-2346
# rpm -qa | grep libstdc
libstdc++10-10.3.0-6.ppc
libstdc++-10-2.ppc
# /node/bin/node -v
v20.10.0

Can you check that your LIBPATH is empty?

echo $LIBPATH

Make sure you have "libstdc++-10-2.ppc" also installed as that will create the symlinks in the default path. 

# dump -X64 -Hov ./node

                        ***Import File Strings***
INDEX  PATH                          BASE                MEMBER              
0      /usr/lib:/lib:/opt/freeware/lib/pthread/ppc64                                         
1                                    libperfstat.a       shr_64.o            
2                                    libdl.a             shr_64.o            
3                                    libstdc++.a         libstdc++.so.6      
4                                    libgcc_s.a          shr.o               
5                                    libpthreads.a       shr_xpg5_64.o       
6                                    libc.a              shr_64.o     

# rpm -qf /opt/freeware/lib/pthread/ppc64/libstdc++.a
libstdc++-10-2.ppc

# ls -l /opt/freeware/lib/pthread/ppc64/libstdc++.a
lrwxrwxrwx    1 root     system           61 Dec 12 07:59 /opt/freeware/lib/pthread/ppc64/libstdc++.a -> ../../gcc/powerpc-ibm-aix7.2.0.0/10/pthread/ppc64/libstdc++.a