From 99b351b4bde2d9697b4e9abaa54458dcff1288d1 Mon Sep 17 00:00:00 2001
From: Carlos Hernandez <chernand@yelp.com>
Date: Mon, 31 May 2021 09:20:22 -0600
Subject: [PATCH] tree-sitter: explicitly incl CXX headers on Darwin

clang needs to find headers + libraries for compiling with libc++.
On Darwin we will include CXX headers when compiling C.

This closes #124396
---
 pkgs/development/tools/parsing/tree-sitter/grammar.nix | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pkgs/development/tools/parsing/tree-sitter/grammar.nix b/pkgs/development/tools/parsing/tree-sitter/grammar.nix
index 5ca381e6d2ff..93e1cb3804fb 100644
--- a/pkgs/development/tools/parsing/tree-sitter/grammar.nix
+++ b/pkgs/development/tools/parsing/tree-sitter/grammar.nix
@@ -1,5 +1,7 @@
 { stdenv
 , tree-sitter
+, libcxx
+, lib
 }:
 
 # Build a parser grammar and put the resulting shared object in `$out/parser`
@@ -27,6 +29,7 @@ stdenv.mkDerivation {
       "${source}/${location}"
   ;
 
+  NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin "-I${lib.getDev libcxx}/include/c++/v1";
   buildInputs = [ tree-sitter ];
 
   dontUnpack = true;