build CHANGE normalize cmake's build type

Author: rkrejci

CMakeLists.txt

@@ -30,6 +30,17 @@ set(CMAKE_MACOSX_RPATH TRUE)
 if(NOT CMAKE_BUILD_TYPE)
     set(CMAKE_BUILD_TYPE Debug)
 endif()
+# normalize build type string
+string(TOUPPER "${CMAKE_BUILD_TYPE}" BUILD_TYPE_UPPER)
+if ("${BUILD_TYPE_UPPER}" STREQUAL "RELEASE")
+  set(CMAKE_BUILD_TYPE "Release" CACHE STRING "Build Type" FORCE)
+elseif ("${BUILD_TYPE_UPPER}" STREQUAL "DEBUG")
+  set(CMAKE_BUILD_TYPE "Debug" CACHE STRING "Build Type" FORCE)
+elseif ("${BUILD_TYPE_UPPER}" STREQUAL "RELWITHDEBINFO")
+  set(CMAKE_BUILD_TYPE "RelWithDebInfo" CACHE STRING "Build Type" FORCE)
+elseif ("${BUILD_TYPE_UPPER}" STREQUAL "RELWITHDEBUG")
+  set(CMAKE_BUILD_TYPE "RelWithDebug" CACHE STRING "Build Type" FORCE)
+endif()
 
 add_compile_options(-Wall -Wextra -fvisibility=hidden -std=gnu99)
 set(CMAKE_C_FLAGS_PACKAGE "-g -O2 -DNDEBUG")