Python Clang Bindings don't find standard headers on Fedora

[jnikula]

Recently, we added #include <stdbool.h> to a number of tests. It works fine on various versions of Debian.

However, on Fedora, it's not found. At least not in the recently added Docker images. Run make docker-test.fedora-37 to reproduce.

Is something missing in the Dockerfiles? Some clang configuration different on Fedora? The header files can be found in /usr/lib64/clang/15.0.7/include/stdbool.h.

Running clang inside the container to figure out include paths gives:

$ cat /dev/null | clang -E -Wp,-v -
clang -cc1 version 15.0.7 based upon LLVM 15.0.7 default target x86_64-redhat-linux-gnu
ignoring nonexistent directory "/usr/bin/../lib/gcc/x86_64-redhat-linux/12/../../../../x86_64-redhat-linux/include"
ignoring nonexistent directory "/include"
#include "..." search starts here:
#include <...> search starts here:
 /usr/lib64/clang/15.0.7/include
 /usr/local/include
 /usr/include
End of search list.
# 1 "<stdin>"
# 1 "<built-in>" 1
# 1 "<built-in>" 3
# 370 "<built-in>" 3
# 1 "<command line>" 1
# 1 "<built-in>" 2
# 1 "<stdin>" 2

hawkmoth test/c/variable.c inside the container fails with CRITICAL: test/c/variable.c:1: 'stdbool.h' file not found.

Explicitly specifying the include path works: hawkmoth --clang=-I/usr/lib64/clang/15.0.7/include test/c/variable.c

But Debian does not require that.