From 64e95f6ad7e6778e88f03257d6037040c7646f38 Mon Sep 17 00:00:00 2001
From: a dinosaur <nick@a-dinosaur.com>
Date: Wed, 27 Nov 2019 14:58:52 +1100
Subject: [PATCH] cmake: add a toolchain file and convenience script for clang
 builds

---
 .gitignore                               |  3 ++-
 cmake/Toolchain-clang-linux-native.cmake | 16 ++++++++++++++++
 gen-clang.sh                             |  7 +++++++
 3 files changed, 25 insertions(+), 1 deletion(-)
 create mode 100644 cmake/Toolchain-clang-linux-native.cmake
 create mode 100755 gen-clang.sh

diff --git a/.gitignore b/.gitignore
index bc8d847d..240f12d8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,7 +9,8 @@ demos
 .idea/
 CmakeSettings.json
 cmake-build-*/
-build
+build/
+build-clang/
 build-DobieStation-*
 debug
 release
diff --git a/cmake/Toolchain-clang-linux-native.cmake b/cmake/Toolchain-clang-linux-native.cmake
new file mode 100644
index 00000000..44d80748
--- /dev/null
+++ b/cmake/Toolchain-clang-linux-native.cmake
@@ -0,0 +1,16 @@
+# The name of the target operating system
+set(CMAKE_SYSTEM_NAME Linux)
+
+# Try to find clang for C and C++
+find_program(CMAKE_C_COMPILER   clang)
+find_program(CMAKE_CXX_COMPILER clang++)
+
+# Toolchain find root modes
+#   NEVER - search host system only
+#   ONLY  - search CMAKE_FIND_ROOT_PATH only
+#   BOTH  - search both
+# Probably not needed for a native toolchain so commenting these out
+#set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
+#set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
+#set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
+#set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE ONLY)
diff --git a/gen-clang.sh b/gen-clang.sh
new file mode 100755
index 00000000..3628ea18
--- /dev/null
+++ b/gen-clang.sh
@@ -0,0 +1,7 @@
+#!/bin/sh
+
+CMAKE="cmake"
+BUILD_DIR="build-clang"
+TOOLCHAIN="./cmake/Toolchain-clang-linux-native.cmake"
+
+exec $CMAKE . -B "$BUILD_DIR" -DCMAKE_TOOLCHAIN_FILE="$TOOLCHAIN" "$@"