From 52fdec589223ebc04987c12ad2c4d1e847e8e972 Mon Sep 17 00:00:00 2001
From: MerryMage <MerryMage@users.noreply.github.com>
Date: Sat, 3 Dec 2016 16:06:09 +0000
Subject: [PATCH] CMakeLists: Add support for LLVM on Windows

The LLVM project provides a clang-based MSVC compatible toolset for
Microsoft Visual Studio. This suite is sometimes refered to as "clang-cl".

This patch adds a few compiler flags to support this toolset.
---
 CMakeLists.txt | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9ea0757c..3a236353 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -37,6 +37,13 @@ if (MSVC)
                         /EHsc
                         /WX)
     add_compile_options(/DNOMINMAX)
+
+    if (CMAKE_VS_PLATFORM_TOOLSET MATCHES "LLVM-vs[0-9]+")
+        add_compile_options(-Qunused-arguments
+                            -Wno-unused-parameter
+                            -Wno-missing-braces)
+        add_compile_options(-Xclang -fno-operator-names)
+    endif()
 else()
     add_compile_options(-Wall
                         -Werror