sn-bindgen fails on Debian sid

[DavidGoodenough]

Given a very simple file "test.h":-

#include <stdint.h>
uint8_t hello();

if I run:- ~/src/RclSn/target/streams/_build/_global/bindgenBinary/_global/streams/sn-bindgen-gh-release-binary/v0.3.0 --header test.h --clang -v --package bah --scala

Debian clang version 17.0.6 (23+b2)
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir:
Found candidate GCC installation: /../lib/gcc/x86_64-linux-gnu/10
Found candidate GCC installation: /../lib/gcc/x86_64-linux-gnu/11
Found candidate GCC installation: /../lib/gcc/x86_64-linux-gnu/12
Found candidate GCC installation: /../lib/gcc/x86_64-linux-gnu/13
Found candidate GCC installation: /../lib/gcc/x86_64-linux-gnu/14
Found candidate GCC installation: /../lib/gcc/x86_64-linux-gnu/15
Found candidate GCC installation: /../lib/gcc/x86_64-linux-gnu/6
Found candidate GCC installation: /../lib/gcc/x86_64-linux-gnu/6.5.0
Found candidate GCC installation: /../lib/gcc/x86_64-linux-gnu/7
Found candidate GCC installation: /../lib/gcc/x86_64-linux-gnu/7.5.0
Found candidate GCC installation: /../lib/gcc/x86_64-linux-gnu/8
Found candidate GCC installation: /../lib/gcc/x86_64-linux-gnu/9
Selected GCC installation: /../lib/gcc/x86_64-linux-gnu/15
Candidate multilib: .;@m64
Selected multilib: .;@m64
ignoring nonexistent directory "/../lib/gcc/x86_64-linux-gnu/15/../../../../x86_64-linux-gnu/include"
ignoring nonexistent directory "/include"
ignoring duplicate directory "/usr/local/include"
as it is a non-system directory that duplicates a system directory
ignoring duplicate directory "/usr/include/x86_64-linux-gnu"
as it is a non-system directory that duplicates a system directory
ignoring duplicate directory "/usr/include"
as it is a non-system directory that duplicates a system directory
#include "..." search starts here:
#include <...> search starts here:
/usr/lib/llvm-21/lib/clang/21/include
/usr/include/clang/17.0.6/include
/usr/local/include
/usr/include/x86_64-linux-gnu
/usr/include
End of search list.
Clang reported [1] errors
[bindgen] error test.h:2:1: error: unknown type name 'uint8_t'

If I run clang -v test.h
Debian clang version 21.1.8 (2)
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/lib/llvm-21/bin
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/10
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/11
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/12
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/13
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/14
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/15
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/6
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/6.5.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7.5.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/8
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/9
Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/15
Candidate multilib: .;@m64
Selected multilib: .;@m64
(in-process)
"/usr/lib/llvm-21/bin/clang" -cc1 -triple x86_64-pc-linux-gnu -emit-pch -dumpdir a- -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name test.h -mrelocation-model pic -pic-level 2 -pic-is-pie -mframe-pointer=all -fmath-errno -ffp-contract=on -fno-rounding-math -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -fdebug-compilation-dir=/home/david/tmp -v -fcoverage-compilation-dir=/home/david/tmp -resource-dir /usr/lib/llvm-21/lib/clang/21 -internal-isystem /usr/lib/llvm-21/lib/clang/21/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/15/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -ferror-limit 19 -fmessage-length=236 -fgnuc-version=4.2.1 -fskip-odr-check-in-gmf -fcolor-diagnostics -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o test.h.pch -x c-header test.h
clang -cc1 version 21.1.8 based upon LLVM 21.1.8 default target x86_64-pc-linux-gnu
ignoring nonexistent directory "/usr/lib/gcc/x86_64-linux-gnu/15/../../../../x86_64-linux-gnu/include"
ignoring nonexistent directory "/include"
#include "..." search starts here:
#include <...> search starts here:
/usr/lib/llvm-21/lib/clang/21/include
/usr/local/include
/usr/include/x86_64-linux-gnu
/usr/include
End of search list.

This seems to find the right directories, sn-bindgen does not. Note that using clang-17 rather than clang (which is ln to clang21) makes no difference.