root [ ~ ]# g++ -E -x c++ - -v < /dev/null
Using built-in specs.
COLLECT_GCC=g++
Target: x86_64-pc-linux-gnu
Configured with: ../configure --prefix=/usr LD=ld --enable-languages=c,c++ --disable-multilib --disable-bootstrap --with-system-zlib : (reconfigured) ../configure --prefix=/usr LD=ld --enable-languages=c,c++ --disable-multilib --disable-bootstrap --with-system-zlib
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 10.1.0 (GCC)
COLLECT_GCC_OPTIONS='-E' '-v' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
 /usr/libexec/gcc/x86_64-pc-linux-gnu/10.1.0/cc1plus -E -quiet -v -D_GNU_SOURCE - -mtune=generic -march=x86-64
ignoring nonexistent directory "/usr/lib/gcc/x86_64-pc-linux-gnu/10.1.0/../../../../x86_64-pc-linux-gnu/include"
ignoring duplicate directory "/usr/include"
#include "..." search starts here:
#include <...> search starts here:
 /usr/include
 /usr/lib/gcc/x86_64-pc-linux-gnu/10.1.0/../../../../include/c++/10.1.0
 /usr/lib/gcc/x86_64-pc-linux-gnu/10.1.0/../../../../include/c++/10.1.0/x86_64-pc-linux-gnu
 /usr/lib/gcc/x86_64-pc-linux-gnu/10.1.0/../../../../include/c++/10.1.0/backward
 /usr/lib/gcc/x86_64-pc-linux-gnu/10.1.0/include
 /usr/local/include
 /usr/lib/gcc/x86_64-pc-linux-gnu/10.1.0/include-fixed
End of search list.
# 1 "<stdin>"
# 1 "<built-in>"
# 1 "<command-line>"
# 1 "/usr/include/stdc-predef.h" 1 3
# 1 "<command-line>" 2
# 1 "<stdin>"
COMPILER_PATH=/usr/libexec/gcc/x86_64-pc-linux-gnu/10.1.0/:/usr/libexec/gcc/x86_64-pc-linux-gnu/10.1.0/:/usr/libexec/gcc/x86_64-pc-linux-gnu/:/usr/lib/gcc/x86_64-pc-linux-gnu/10.1.0/:/usr/lib/gcc/x86_64-pc-linux-gnu/
LIBRARY_PATH=/usr/lib/../lib/:/usr/lib/gcc/x86_64-pc-linux-gnu/10.1.0/:/usr/lib/gcc/x86_64-pc-linux-gnu/10.1.0/../../../../lib/:/lib/../lib/:/usr/lib/../lib/:/usr/lib/:/usr/lib/gcc/x86_64-pc-linux-gnu/10.1.0/../../../:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-E' '-v' '-shared-libgcc' '-mtune=generic' '-march=x86-64'

root [ ~ ]# ldd --version
ldd (GNU libc) 2.31
Copyright (C) 2020 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
Written by Roland McGrath and Ulrich Drepper.

root [ ~ ]# ldconfig -v
ldconfig: Can't stat /opt/lib: No such file or directory
ldconfig: Can't stat /libx32: No such file or directory
ldconfig: Path `/usr/lib' given more than once
ldconfig: Can'