ref: 493b94919f06da05ce20b8ecae74e867a61f646e
dir: /CMakeLists.txt/
#
# This file is part of RGBDS.
#
# Copyright (c) 2020 RGBDS contributors.
#
# SPDX-License-Identifier: MIT
#
# 3.9 required for LTO checks
cmake_minimum_required(VERSION 3.9 FATAL_ERROR)
project(rgbds
LANGUAGES C CXX)
# get real path of source and binary directories
get_filename_component(srcdir "${CMAKE_SOURCE_DIR}" REALPATH)
get_filename_component(bindir "${CMAKE_BINARY_DIR}" REALPATH)
# reject in-source builds, may conflict with Makefile
if(srcdir STREQUAL bindir)
message("RGBDS should not be built in the source directory.")
message("Instead, create a separate build directory and specify to CMake the path to the source directory.")
message(FATAL_ERROR "Terminating configuration")
endif()
option(SANITIZERS "Build with sanitizers enabled" OFF) # Ignored on MSVC
option(MORE_WARNINGS "Turn on more warnings" OFF) # Ignored on MSVC
if(MSVC)
# MSVC's standard library triggers warning C5105,
# "macro expansion producing 'defined' has undefined behavior"
add_compile_options(/std:c11 /W1 /MP /wd5105)
add_definitions(/D_CRT_SECURE_NO_WARNINGS)
else()
add_compile_options(-Wall -pedantic)
add_definitions(-D_POSIX_C_SOURCE=200809L -D_ISOC11_SOURCE)
if(SANITIZERS)
set(SAN_FLAGS -fsanitize=shift -fsanitize=integer-divide-by-zero
-fsanitize=unreachable -fsanitize=vla-bound
-fsanitize=signed-integer-overflow -fsanitize=bounds
-fsanitize=object-size -fsanitize=bool -fsanitize=enum
-fsanitize=alignment -fsanitize=null -fsanitize=address)
add_compile_options(${SAN_FLAGS})
link_libraries(${SAN_FLAGS})
# A non-zero optimization level is desired in debug mode, but allow overriding it nonetheless
# TODO: this overrides anything previously set... that's a bit sloppy!
set(CMAKE_C_FLAGS_DEBUG "-g -Og -fno-omit-frame-pointer -fno-optimize-sibling-calls" CACHE STRING "" FORCE)
set(CMAKE_CXX_FLAGS_DEBUG "-g -Og -fno-omit-frame-pointer -fno-optimize-sibling-calls" CACHE STRING "" FORCE)
endif()
if(MORE_WARNINGS)
add_compile_options(-Werror -Wextra
-Walloc-zero -Wcast-align -Wcast-qual -Wduplicated-branches -Wduplicated-cond
-Wfloat-equal -Wlogical-op -Wnull-dereference -Wshift-overflow=2
-Wstringop-overflow=4 -Wstrict-overflow=5 -Wundef -Wuninitialized -Wunused
-Wshadow # TODO: -Wshadow=compatible-local ?
-Wformat=2 -Wformat-overflow=2 -Wformat-truncation=1
-Wno-format-nonliteral # We have a couple of "dynamic" prints
# We do some range checks that are always false on some platforms (GCC, Clang)
-Wno-type-limits -Wno-tautological-constant-out-of-range-compare
-Wvla # MSVC does not support VLAs
-Wno-unknown-warning-option) # Clang shouldn't diagnose unknown warnings
endif()
endif()
# Use versioning consistent with Makefile
# the git revision is used but uses the fallback in an archive
find_program(GIT git)
if(GIT)
execute_process(COMMAND ${GIT} describe --tags --dirty --always
WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
OUTPUT_VARIABLE GIT_REV OUTPUT_STRIP_TRAILING_WHITESPACE
ERROR_QUIET)
message(STATUS "RGBDS version: ${GIT_REV}")
else(GIT)
message(STATUS "Cannot determine RGBDS version (Git not installed), falling back")
endif(GIT)
include_directories("${PROJECT_SOURCE_DIR}/include")
set(CMAKE_C_STANDARD 11)
set(CMAKE_C_STANDARD_REQUIRED True)
add_subdirectory(src)
# By default, build in Release mode; Debug mode must be explicitly requested
# (You may want to augment it with the options above)
if(CMAKE_BUILD_TYPE STREQUAL "Release")
message(CHECK_START "Checking if LTO is supported")
include(CheckIPOSupported)
check_ipo_supported(RESULT enable_lto)
if(enable_lto)
message(CHECK_PASS "yes")
set_property(TARGET rgbasm rgblink rgbfix rgbgfx PROPERTY INTERPROCEDURAL_OPTIMIZATION ON)
else()
message(CHECK_FAIL "no")
endif()
endif()
set(MANDIR "share/man")
set(man1 "man/rgbasm.1"
"man/rgbfix.1"
"man/rgbgfx.1"
"man/rgblink.1")
set(man5 "man/rgbasm.5"
"man/rgblink.5"
"man/rgbds.5")
set(man7 "man/gbz80.7"
"man/rgbds.7")
foreach(SECTION "man1" "man5" "man7")
set(DEST "${MANDIR}/${SECTION}")
install(FILES ${${SECTION}} DESTINATION ${DEST})
endforeach()