cmake: make build type configurable

$ cmake -D CMAKE_BUILD_TYPE=Debug .

Author: baranyaib90

.github/workflows/cmake.yml

@@ -32,7 +32,7 @@ jobs:
     - name: Configure CMake
       env:
         CC: ${{ matrix.compiler }}
-      run: cmake -B ${{github.workspace}}/
+      run: cmake -D CMAKE_BUILD_TYPE=Debug -B ${{github.workspace}}/
 
     - name: Build
       env:

CMakeLists.txt

@@ -16,8 +16,10 @@ endfunction()
 
 # CONFIG
 
-set(CMAKE_BUILD_TYPE "Debug")
-#set(CMAKE_BUILD_TYPE "Release")
+if(NOT CMAKE_BUILD_TYPE)
+  set(CMAKE_BUILD_TYPE "Release")
+  message(STATUS "Setting build type to '${CMAKE_BUILD_TYPE}' as none was specified.")
+endif()
 
 set(CMAKE_C_FLAGS "-Wall -Wextra --pedantic -Wno-strict-aliasing -Wno-variadic-macros")
 set(CMAKE_C_FLAGS_DEBUG "-g -DDEBUG")