# Version 3.8 is the first version that supports CXX_STANDARD 17.
cmake_minimum_required(VERSION 3.8)
project(TMatrix CXX)

# Use the C++17 standard.
set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

# Setup different build types. Release is the default.
if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
   set(CMAKE_BUILD_TYPE Release)
endif()
set(CMAKE_CXX_FLAGS "-Wall -Wextra -Wpedantic")
set(CMAKE_CXX_FLAGS_RELEASE "-O2")
set(CMAKE_CXX_FLAGS_DEBUG  "-O0 -g")
set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "-O2 -g")

# Add linking with pthread.
set(CMAKE_EXE_LINKER_FLAGS "-pthread")

# Add the required ncurses library.
set(CURSES_NEED_NCURSES TRUE)
find_package(Curses REQUIRED)
link_libraries(${CURSES_LIBRARIES})

# Link libatomic explicitly because some platforms require it.
find_library(ATOMIC_LIB atomic)
# Check if libatomic is present (it may not be, for example on macOS).
if(ATOMIC_LIB)
	link_libraries(${ATOMIC_LIB})
endif()

# Add all the .cpp files.
file(GLOB tmatrix_SRC "src/*.cpp")
add_executable(tmatrix ${tmatrix_SRC})

# Specify the include directory.
include_directories(include)

# Specify how to compress the man page.
configure_file(tmatrix.6 ${PROJECT_BINARY_DIR}/tmatrix.6)
add_custom_command(OUTPUT tmatrix.6.gz
	COMMAND gzip -f tmatrix.6
	DEPENDS tmatrix.6
)
add_custom_target(manpage ALL DEPENDS tmatrix.6.gz)

# If the user didn't change the default install prefix set it to "/usr"
if(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)
	set(CMAKE_INSTALL_PREFIX "/usr" CACHE PATH "..." FORCE)
endif()

# Install tmatrix binary and manpage.
install(TARGETS tmatrix DESTINATION bin)
install(FILES ${PROJECT_BINARY_DIR}/tmatrix.6.gz DESTINATION share/man/man6)

# Install bash and zsh completion scripts.
install(FILES completions/tmatrix-completion.bash
	DESTINATION share/bash-completion/completions
	RENAME tmatrix
)
install(FILES completions/tmatrix-completion.zsh
	DESTINATION share/zsh/site-functions
	RENAME _tmatrix
)