Hello,
When running clang on a c++ program, it cannot find c++ std libraries. That's because, those libraries path are hardcoded inside g++ compiler and clang cannot find them. This has already been discussed here: https://issues.guix.info/issue/32773, without reaching a solution. Running this program, --8<---------------cut here---------------start------------->8--- #include <string> int main() { return 0; } --8<---------------cut here---------------end--------------->8--- I have this error: --8<---------------cut here---------------start------------->8--- mathieu@meru:~/tmp$ ~/.guix-profile/bin/clang t.cpp #include <string> ^~~~~~~~ t.cpp:1:10: fatal error: 'string' file not found 1 error generated. --8<---------------cut here---------------end--------------->8--- that's because: --8<---------------cut here---------------start------------->8--- mathieu@meru:~/tmp$ ~/.guix-profile/bin/clang -v t.cpp ... #include "..." search starts here: #include <...> search starts here: /gnu/store/933ijsm5wwjkvlh963lc3pxc7i3dfxcp-profile/include /gnu/store/i2vzqb02gxcm5c2zix92lq3ay73kbl9s-clang-8.0.0/lib/clang/8.0.0/include /gnu/store/ahqgl4h89xqj695lgqvsaf6zh2nhy4pj-glibc-2.29/include End of search list. #include <string> ^~~~~~~~ t.cpp:1:10: fatal error: 'string' file not found 1 error generated. --8<---------------cut here---------------end--------------->8--- whereas, --8<---------------cut here---------------start------------->8--- mathieu@meru:~/tmp$ ~/.guix-profile/bin/g++ -v t.cpp ... #include "..." search starts here: #include <...> search starts here: /gnu/store/933ijsm5wwjkvlh963lc3pxc7i3dfxcp-profile/include /gnu/store/x3jx25cd3q363mr7nbgzrhrv1vza6cf7-gcc-7.4.0/include/c++ [1] /gnu/store/x3jx25cd3q363mr7nbgzrhrv1vza6cf7-gcc-7.4.0/include/c++/x86_64-unknown-linux-gnu [2] /gnu/store/x3jx25cd3q363mr7nbgzrhrv1vza6cf7-gcc-7.4.0/include/c++/backward [3] /gnu/store/2plcy91lypnbbysb18ymnhaw3zwk8pg1-gcc-7.4.0-lib/lib/gcc/x86_64-unknown-linux-gnu/7.4.0/include /gnu/store/2plcy91lypnbbysb18ymnhaw3zwk8pg1-gcc-7.4.0-lib/lib/gcc/x86_64-unknown-linux-gnu/7.4.0/include-fixed /gnu/store/ahqgl4h89xqj695lgqvsaf6zh2nhy4pj-glibc-2.29/include ... --8<---------------cut here---------------end--------------->8--- Hardcoding the paths [1], [2] and [3] into clang would solve the issue, but it might not be the better way to proceed. WDYT? Mathieu