From 7347fc5afa9a876b262356acf973bac752b5896d Mon Sep 17 00:00:00 2001
From: Roelf-Jilling <r-j.wolthuis@live.com>
Date: Tue, 13 Nov 2018 19:17:55 +0100
Subject: [PATCH] Add clang-cl  configurations

---
 appveyor.yml | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/appveyor.yml b/appveyor.yml
index 2fc8a16..a524971 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -15,12 +15,20 @@ image:
 environment:
   matrix:
     - GSL_CXX_STANDARD: 14
+      USE_COMPILER: MSVC
+    - GSL_CXX_STANDARD: 14
+      USE_COMPILER: MSVC
     - GSL_CXX_STANDARD: 17
+      USE_COMPILER: clang-cl
+    - GSL_CXX_STANDARD: 17
+      USE_COMPILER: clang-cl
 
 matrix:
     exclude:
     - image: Visual Studio 2015
       GSL_CXX_STANDARD: 17
+    - image: Visual Studio 2015
+      USE_COMPILER: clang-cl
 
 cache:
   - C:\cmake-3.8.0-win32-x86
@@ -47,7 +55,12 @@ before_build:
           $env:generator="$env:generator Win64"
       }
       echo generator="$env:generator"
-      cmake .. -G "$env:generator" -DGSL_CXX_STANDARD="$env:GSL_CXX_STANDARD"
+      if ("$env:USE_COMPILER=" -match "clang_cl") {
+          cmake .. -G "$env:generator" -T LLVM -DGSL_CXX_STANDARD="$env:GSL_CXX_STANDARD"
+      }
+      else {
+          cmake .. -G "$env:generator" -DGSL_CXX_STANDARD="$env:GSL_CXX_STANDARD"
+      }
 
 build_script:
   - cmake --build . --config %CONFIGURATION% -- /m /v:minimal