Add wrappers for 'zig c++' to work around clangd

README.md

@@ -16,3 +16,22 @@ You can create toolchains for other triples like this. Here is an example to bui
 set(ZIG_TARGET "aarch64-windows-gnu")
 include(${CMAKE_CURRENT_LIST_DIR}/zig-toolchain.cmake)
 ```
+
+## clangd
+
+To get [clangd](https://clangd.llvm.org/) to work you need to first enable generation of `compile_commands.json`:
+
+```sh
+cmake -B build -DCMAKE_EXPORT_COMPILE_COMMANDS=ON
+```
+
+Additionally you need to pass pass the following arguments to `clangd`:
+
+```json
+"clangd.arguments": [
+    "--log=verbose",
+    "--query-driver=*/clang-cl.exe,*/zig-cc.*,*/zig-c++.*,*/em++.bat,*/emcc.bat,*/em++,*/emcc",
+]
+```
+
+Without these arguments `clangd` will not query the driver (`zig c++`) and the include paths will not be resolved correctly.

cmake/zig-c++

@@ -0,0 +1,2 @@
+#!/bin/sh
+zig c++ "$@"

cmake/zig-c++.cmd

@@ -0,0 +1,2 @@
+@echo off
+zig c++ %*

cmake/zig-cc

@@ -0,0 +1,2 @@
+#!/bin/sh
+zig cc "$@"

cmake/zig-cc.cmd

@@ -0,0 +1,2 @@
+@echo off
+zig cc %*

cmake/zig-toolchain.cmake

@@ -33,15 +33,16 @@ endif()
 set(CMAKE_SYSTEM_VERSION 1)
 set(CMAKE_SYSTEM_PROCESSOR ${ZIG_ARCH})
 
-set(CMAKE_C_COMPILER "zig" cc -target ${ZIG_TARGET})
-set(CMAKE_CXX_COMPILER "zig" c++ -target ${ZIG_TARGET})
-
-if(WIN32)
+if(CMAKE_HOST_WIN32)
     set(SCRIPT_SUFFIX ".cmd")
 else()
-    set(SCRIPT_SUFFIX ".sh")
+    set(SCRIPT_SUFFIX "")
 endif()
 
+# Work around a bug in clangd where 'c++' is reordered on the command line
+set(CMAKE_C_COMPILER "${CMAKE_CURRENT_LIST_DIR}/zig-cc${SCRIPT_SUFFIX}" -target ${ZIG_TARGET})
+set(CMAKE_CXX_COMPILER "${CMAKE_CURRENT_LIST_DIR}/zig-c++${SCRIPT_SUFFIX}" -target ${ZIG_TARGET})
+
 # This is working (thanks to Simon for finding this trick)
 set(CMAKE_AR "${CMAKE_CURRENT_LIST_DIR}/zig-ar${SCRIPT_SUFFIX}")
 set(CMAKE_RANLIB "${CMAKE_CURRENT_LIST_DIR}/zig-ranlib${SCRIPT_SUFFIX}")