CMakeLists.txt

# MIT License for CMake Build Infrastructure. See COPYING for the license of
# libusb itself.
#
# Copyright (c) 2023-2026 The OneLuaPro project authors.
#
# Permission is hereby granted, free of charge, to any person obtaining a copy of
# this software and associated documentation files (the "Software"), to deal in
# the Software without restriction, including without limitation the rights to
# use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
# the Software, and to permit persons to whom the Software is furnished to do so,
# subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
#
# ------------------------------------------------------------------------------
# CMake for libusb
# ------------------------------------------------------------------------------
# Setup with Visual Studio 17 2022 generator for x64
# ------------------------------------------------------------------------------
# Visual Studio is a mutlti-configuration generator
# https://stackoverflow.com/questions/24460486/
#
# Basic instructions for out-of-source build
# ------------------------------------------
# mkdir build && cd build
# cmake .. -G "Visual Studio 17 2022" -A x64
# cmake --build . --config Release
# cmake --install . --config Release
# 
# Available architectures (-A ...) are: Win32, x64, ARM, ARM64

# ------------------------------------------------------------------------------
# General definitions
cmake_minimum_required(VERSION 3.23 FATAL_ERROR)

# ------------------------------------------------------------------------------
# Installation prefix directory
# Needs to be defined before project definition statement - for whatever reason
if(NOT CMAKE_INSTALL_PREFIX)
  message(FATAL_ERROR "Need to have a CMAKE_INSTALL_PREFIX.")
endif()

# ------------------------------------------------------------------------------
# Project defintion
project(libusb LANGUAGES C)

# ------------------------------------------------------------------------------
# Other settings
set(CMAKE_VERBOSE_MAKEFILE ON)
if(NOT CMAKE_BUILD_TYPE)
  # Visual Studio generators irgore this setting
  set(CMAKE_BUILD_TYPE Release CACHE STRING "Build type" FORCE)
endif()
# create valiable with upper-case content out of CMAKE_BUILD_TYPE
string(TOUPPER ${CMAKE_BUILD_TYPE} CMAKE_BUILD_TYPE_UC)

# ------------------------------------------------------------------------------
# Setup GNU-alike installatin directories
include (GNUInstallDirs)
set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR}/${CMAKE_INSTALL_LIBDIR})
set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR}/${CMAKE_INSTALL_LIBDIR})
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR}/${CMAKE_INSTALL_BINDIR})
set(INSTALL_LIBDIR
  ${CMAKE_INSTALL_LIBDIR} CACHE PATH "Installation directory for libraries")
set(INSTALL_BINDIR
  ${CMAKE_INSTALL_BINDIR} CACHE PATH "Installation directory for executables")
set(INSTALL_INCLUDEDIR
  ${CMAKE_INSTALL_INCLUDEDIR} CACHE PATH "Installation directory for header files")
set(INSTALL_DOCDIR
  ${CMAKE_INSTALL_DOCDIR} CACHE PATH "Installation directory for documentation")
set(INSTALL_MANDIR
  ${CMAKE_INSTALL_MANDIR} CACHE PATH "Installation directory for manpages")
set(INSTALL_DATAROOTDIR
  ${CMAKE_INSTALL_DATAROOTDIR} CACHE PATH "Installation directory for data")

# ------------------------------------------------------------------------------
# Report to user
message(STATUS "Build type: ${CMAKE_BUILD_TYPE}")
message(STATUS "C compiler flags: ${CMAKE_C_FLAGS} ${CMAKE_C_FLAGS_${CMAKE_BUILD_TYPE_UC}}")

# ------------------------------------------------------------------------------
# Dive into subdirs
add_subdirectory(libusb)

# ------------------------------------------------------------------------------
# Install docs
#install(DIRECTORY docs/ DESTINATION ${INSTALL_DOCDIR})	# "/" omits leading dir
#install(DIRECTORY samples DESTINATION ${INSTALL_DOCDIR})