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# (c) https://github.com/dev-cafe/autocmake/blob/master/AUTHORS.md
# licensed under BSD-3: https://github.com/dev-cafe/autocmake/blob/master/LICENSE
#.rst:
#
# Provides safeguards against in-source builds and bad build types.
#
# Variables used::
#
# PROJECT_SOURCE_DIR
# PROJECT_BINARY_DIR
# CMAKE_BUILD_TYPE
if(${PROJECT_SOURCE_DIR} STREQUAL ${PROJECT_BINARY_DIR})
message(FATAL_ERROR "In-source builds not allowed. Please make a new directory (called a build directory) and run CMake from there.")
endif()
string(TOLOWER "${CMAKE_BUILD_TYPE}" cmake_build_type_tolower)
string(TOUPPER "${CMAKE_BUILD_TYPE}" cmake_build_type_toupper)
if(NOT cmake_build_type_tolower STREQUAL "debug" AND
NOT cmake_build_type_tolower STREQUAL "release" AND
NOT cmake_build_type_tolower STREQUAL "minsizerel" AND
NOT cmake_build_type_tolower STREQUAL "relwithdebinfo")
message(FATAL_ERROR "Unknown build type \"${CMAKE_BUILD_TYPE}\". Allowed values are Debug, Release, RelWithDebInfo, and MinSizeRel (case-insensitive).")
endif()