[CMake] Set default build type correctly

smeenai · smeenai · commit d54da37d18c8 · 2016-11-02T06:10:03.000Z
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 llvm-svn: 285789
diff --git a/llvm/CMakeLists.txt b/llvm/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.
