Support CMAKE_TOOLCHAIN_FILE option

Author: polytypic

commands/setup

@@ -16,6 +16,8 @@ Options:
   CTEST_OUTPUT_ON_FAILURE=1|0
   CTEST_VERBOSITY=|quiet|verbose
 
+  CMAKE_TOOLCHAIN_FILE=...
+
   CC=cc|gcc|clang|...
   CXX=c++|g++|clang++|...
 
@@ -49,6 +51,15 @@ BUILD_DIR=".build"
 
 # Compiler
 
+if [ -n "$CMAKE_TOOLCHAIN_FILE" ]; then
+  GENERATE_CMD+=(-DCMAKE_TOOLCHAIN_FILE="$CMAKE_TOOLCHAIN_FILE")
+
+  TOOLCHAIN_NAME="${CMAKE_TOOLCHAIN_FILE##*/}"
+  TOOLCHAIN_NAME="${TOOLCHAIN_NAME%.*}"
+
+  BUILD_DIR="$BUILD_DIR.$TOOLCHAIN_NAME"
+fi
+
 if [ -n "$CXX" ]; then
   BUILD_DIR="$BUILD_DIR.$CXX"
 fi