[CMake] Set default build type correctly

At least with cmake 3.6.1, the default build type setting was having no
effect; the generated CMakeCache.txt still had an empty CMAKE_BUILD_TYPE.
Force the variable to be set to achieve the desired behavior.

Differential Revision: https://reviews.llvm.org/D26200

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@285789 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1b7fe83e65a496a0f224e02a73338d9615e48ab1..7a70ebcf4b4d8aa48680b1e8ff4ff55ac6105415 100644 (file)
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -51,7 +51,7 @@ project(LLVM
 
 if (NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
   message(STATUS "No build type selected, default to Debug")
-  set(CMAKE_BUILD_TYPE "Debug" CACHE STRING "Build type (default Debug)")
+  set(CMAKE_BUILD_TYPE "Debug" CACHE STRING "Build type (default Debug)" FORCE)
 endif()
 
 # This should only apply if you are both on an Apple host, and targeting Apple.