`fatal error: 'inttypes.h' file not found` when building a simple C++ program

[Carles Cufí]

Using version 17.0.1, and compiling C programs works just fine.
However, when trying to build a C++ program I get:

/Users/carles/bin/LLVMEmbeddedToolchainForArm-17.0.1-Darwin/lib/clang/17/include/inttypes.h:21:15: fatal error: 'inttypes.h' file not found
   21 | #include_next <inttypes.h>
      |               ^~~~~~~~~~~~
1 error generated.

[Carles Cufí]

I was using -nostdinc, hence the issue.