From 5200c9b627e4f0c6c8206cf68e58d7dc58667ea8 Mon Sep 17 00:00:00 2001
From: Claudio Bley <claudio.bley@tweag.io>
Date: Wed, 25 Oct 2023 14:35:09 +0200
Subject: [PATCH] Add clang resource share directory to search path

This is needed e.g. when using `-fsanitize=address` which would otherwise fail with:
```
this rule is missing dependency declarations for the following files included by ...
 '/nix/store/9k6s3zmhj2pvkg8a5s8n7d2sbpffv8hv-clang-wrapper-16.0.1/resource-root/share/asan_ignorelist.txt'
```

Fixes #430
---
 toolchains/cc/cc.nix | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/toolchains/cc/cc.nix b/toolchains/cc/cc.nix
index 77725e1a2..da7f21ae5 100644
--- a/toolchains/cc/cc.nix
+++ b/toolchains/cc/cc.nix
@@ -143,6 +143,12 @@ pkgs.runCommand "bazel-${cc.orignalName or cc.name}-toolchain"
         | xargs -0 -r realpath -ms
     }
     CXX_BUILTIN_INCLUDE_DIRECTORIES=($({
+      if is_compiler_option_supported -print-resource-dir; then
+        resource_dir="$( $cc -print-resource-dir )"
+        if [ -d "$resource_dir/share" ]; then
+          echo "$resource_dir/share"
+        fi
+      fi
       include_dirs_for c
       include_dirs_for c++
       if is_compiler_option_supported -fno-canonical-system-headers; then