From 6852fb8034d30d14498dc874378881696a6ada23 Mon Sep 17 00:00:00 2001
From: Brad King <brad.king@kitware.com>
Date: Mon, 10 Mar 2014 16:51:41 -0400
Subject: CMakeDetermine*Compiler: Factor out search for compiler in PATH

Factor out a _cmake_find_compiler_path helper macro to avoid duplication
of the search for a full path to the compiler.
---
 Modules/CMakeDetermineCompiler.cmake | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

(limited to 'Modules/CMakeDetermineCompiler.cmake')

diff --git a/Modules/CMakeDetermineCompiler.cmake b/Modules/CMakeDetermineCompiler.cmake
index f522c4408f..cd0f8b8eea 100644
--- a/Modules/CMakeDetermineCompiler.cmake
+++ b/Modules/CMakeDetermineCompiler.cmake
@@ -83,3 +83,33 @@ macro(_cmake_find_compiler lang)
     endforeach()
   endif()
 endmacro()
+
+macro(_cmake_find_compiler_path lang)
+  if(CMAKE_${lang}_COMPILER)
+    # we only get here if CMAKE_${lang}_COMPILER was specified using -D or a pre-made CMakeCache.txt
+    # (e.g. via ctest) or set in CMAKE_TOOLCHAIN_FILE
+    # if CMAKE_${lang}_COMPILER is a list of length 2, use the first item as
+    # CMAKE_${lang}_COMPILER and the 2nd one as CMAKE_${lang}_COMPILER_ARG1
+    list(LENGTH CMAKE_${lang}_COMPILER _CMAKE_${lang}_COMPILER_LIST_LENGTH)
+    if("${_CMAKE_${lang}_COMPILER_LIST_LENGTH}" EQUAL 2)
+      list(GET CMAKE_${lang}_COMPILER 1 CMAKE_${lang}_COMPILER_ARG1)
+      list(GET CMAKE_${lang}_COMPILER 0 CMAKE_${lang}_COMPILER)
+    endif()
+    unset(_CMAKE_${lang}_COMPILER_LIST_LENGTH)
+
+    # find the compiler in the PATH if necessary
+    get_filename_component(_CMAKE_USER_${lang}_COMPILER_PATH "${CMAKE_${lang}_COMPILER}" PATH)
+    if(NOT _CMAKE_USER_${lang}_COMPILER_PATH)
+      find_program(CMAKE_${lang}_COMPILER_WITH_PATH NAMES ${CMAKE_${lang}_COMPILER})
+      if(CMAKE_${lang}_COMPILER_WITH_PATH)
+        set(CMAKE_${lang}_COMPILER ${CMAKE_${lang}_COMPILER_WITH_PATH})
+        get_property(_CMAKE_${lang}_COMPILER_CACHED CACHE CMAKE_${lang}_COMPILER PROPERTY TYPE)
+        if(_CMAKE_${lang}_COMPILER_CACHED)
+          set(CMAKE_${lang}_COMPILER "${CMAKE_${lang}_COMPILER}" CACHE STRING "${lang} compiler" FORCE)
+        endif()
+        unset(_CMAKE_${lang}_COMPILER_CACHED)
+      endif()
+      unset(CMAKE_${lang}_COMPILER_WITH_PATH CACHE)
+    endif()
+  endif()
+endmacro()
-- 
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