Description of problem: cross-gcc aarch64 on x86_64 host. It expects to find the C++ headers in gcc folders with a 12 in them. However the libstdc++-devel that is available for aarch64 CentOS 9 uses version 11, so it cannot find C++ headers without extra include paths. Version-Release number of selected component (if applicable): gcc-c++-aarch64-linux-gnu 12.1.1-1.el9 libstdc++-devel 11.3.1-2.1.el9 How reproducible: Every time Steps to Reproduce: 1. Install gcc-c++-aarch64-linux-gnu on x86_64 host 2. Try to compile a simple C++ file 3. You will get include errors as the default includes are wrong Actual results: ``` # /usr/bin/aarch64-linux-gnu-c++ -v test.cpp ... snip ignoring nonexistent directory "/usr/lib/gcc/aarch64-linux-gnu/12/../../../../aarch64-linux-gnu/include/c++/12" ignoring nonexistent directory "/usr/lib/gcc/aarch64-linux-gnu/12/../../../../aarch64-linux-gnu/include/c++/12/aarch64-linux-gnu" ignoring nonexistent directory "/usr/lib/gcc/aarch64-linux-gnu/12/../../../../aarch64-linux-gnu/include/c++/12/backward" ignoring nonexistent directory "/usr/lib/gcc/aarch64-linux-gnu/12/../../../../aarch64-linux-gnu/include" #include "..." search starts here: #include <...> search starts here: /usr/lib/gcc/aarch64-linux-gnu/12/include /usr/aarch64-linux-gnu/sys-root/usr/local/include /usr/lib/gcc/aarch64-linux-gnu/12/include-fixed /usr/aarch64-linux-gnu/sys-root/usr/include End of search list. GNU C++17 (GCC) version 12.1.1 20220507 (Red Hat Cross 12.1.1-1) (aarch64-linux-gnu) compiled by GNU C version 11.2.1 20220127 (Red Hat 11.2.1-9), GMP version 6.2.0, MPFR version 4.1.0-p9, MPC version 1.2.1, isl version none GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072 Compiler executable checksum: ee1d63ceabfbcd15639b63b507165dcf test.cpp:1:10: fatal error: string: No such file or directory 1 | #include <string> | ^~~~~~~~ compilation terminated. ``` Expected results: I expect libstc++-devel from CentOS 9 repo to be fully compatible with cross-gcc from EPEL 9. Additional info: