build: ensure build type is set

Author: alandefreitas

CMakeLists.txt

@@ -3,6 +3,7 @@
 #######################################################
 # Project information
 cmake_minimum_required(VERSION 3.15)
+include(cmake/functions/ensure_build_type.cmake)
 project(Matplot++ VERSION 1.2.0)
 set(MATPLOT_ROOT_DIR ${CMAKE_CURRENT_SOURCE_DIR})
 set(MATPLOT_VERSION ${CMAKE_PROJECT_VERSION})

cmake/functions/ensure_build_type.cmake

@@ -0,0 +1,34 @@
+#
+# Copyright (c) 2023 Alan de Freitas (alandefreitas@gmail.com)
+#
+# Distributed under the Boost Software License, Version 1.0.
+# See accompanying file LICENSE or copy at http://www.boost.org/LICENSE_1_0.txt
+#
+# Official repository: https://github.com/alandefreitas/futures
+#
+
+if (NOT CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
+    return()
+endif ()
+
+# Set a default build type if none was specified
+set(default_build_type "Release")
+if (EXISTS "${CMAKE_SOURCE_DIR}/.git")
+    set(default_build_type "Debug")
+endif ()
+
+if (NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
+    message(STATUS "Setting build type to '${default_build_type}' as none was specified.")
+    get_property(IS_MULTICONFIG GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)
+    if (NOT IS_MULTICONFIG)
+        set(CMAKE_BUILD_TYPE "${default_build_type}" CACHE STRING "Choose the type of build." FORCE)
+        set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS "Debug" "Release" "MinSizeRel" "RelWithDebInfo")
+    else ()
+        set(CMAKE_CONFIGURATION_TYPES "${default_build_type}" CACHE STRING "Choose the type of build." FORCE)
+    endif()
+endif ()
+
+
+if(NOT gen_multi AND NOT (CMAKE_BUILD_TYPE OR DEFINED ENV{CMAKE_BUILD_TYPE}))
+    set(CMAKE_BUILD_TYPE Release CACHE STRING "Release can have faster run time than Debug")
+endif()