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cmake_minimum_required(VERSION 3.15)
project(maze VERSION 0.9 LANGUAGES C)
set(CMAKE_C_STANDARD 11)
set(CMAKE_C_STANDARD_REQUIRED ON)
# --- Termux install prefix ---------------------------------------------------
# Termux has no /usr/local; everything lives under $PREFIX
# (/data/data/com.termux/files/usr). CMake's default install prefix would fail
# there, so default to $PREFIX when we detect Termux and the user didn't pass
# -DCMAKE_INSTALL_PREFIX explicitly. Harmless on every other platform.
if(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT
AND DEFINED ENV{PREFIX}
AND "$ENV{PREFIX}" MATCHES "com\\.termux")
set(CMAKE_INSTALL_PREFIX "$ENV{PREFIX}" CACHE PATH "Install prefix" FORCE)
endif()
include(GNUInstallDirs)
# --- Wide-character ncurses --------------------------------------------------
# Prefer pkg-config. Termux ships ncursesw.pc (with a compatibility ncurses.pc
# symlink), and pkg-config returns the correct include dir and -lncursesw.
# This avoids FindCurses fragility and Termux's occasionally-broken
# $PREFIX/include/ncurses/ subdirectory symlinks. Falls back to FindCurses on
# systems without pkg-config (or without a .pc file for ncursesw).
find_package(PkgConfig QUIET)
if(PkgConfig_FOUND)
pkg_check_modules(NCURSESW IMPORTED_TARGET ncursesw)
endif()
# Recursive glob over *.c only (the old "src/*" pulled headers into the target).
# CONFIGURE_DEPENDS re-runs the glob at build time so new files are picked up.
file(GLOB_RECURSE maze_SRC CONFIGURE_DEPENDS src/*.c)
add_executable(maze ${maze_SRC})
target_include_directories(maze PRIVATE src)
# _XOPEN_SOURCE=600 unlocks the wide-character ncurses API (add_wch, get_wch,
# waddnwstr, ...). _DEFAULT_SOURCE re-enables BSD/default declarations that a
# strict _XOPEN_SOURCE would otherwise hide. These previously lived in
# CMAKE_CXX_FLAGS and were silently ignored because this is a C project.
#
# Termux note: if you hit "implicit declaration of function" errors here on
# Android/Bionic, ADD _GNU_SOURCE below rather than removing _XOPEN_SOURCE.
target_compile_definitions(maze PRIVATE
_DEFAULT_SOURCE
_XOPEN_SOURCE=600
)
# Extra warnings, but only for Debug builds (configure with
# -DCMAKE_BUILD_TYPE=Debug). The $<CONFIG:Debug> generator expression emits each
# flag only when the active configuration is Debug, so this works under both
# single-config generators (Make/Ninja, where the build type is fixed at
# configure time) and multi-config generators (Visual Studio/Xcode/Ninja
# Multi-Config, where it is chosen at build time). GCC/Clang flag syntax, which
# is fine for Linux and Termux.
target_compile_options(maze PRIVATE
$<$<CONFIG:Debug>:-Wall>
$<$<CONFIG:Debug>:-Wextra>
)
if(TARGET PkgConfig::NCURSESW)
target_link_libraries(maze PRIVATE PkgConfig::NCURSESW)
else()
set(CURSES_NEED_WIDE TRUE)
set(CURSES_NEED_NCURSES TRUE)
find_package(Curses REQUIRED)
target_include_directories(maze PRIVATE ${CURSES_INCLUDE_DIRS})
target_link_libraries(maze PRIVATE ${CURSES_LIBRARIES})
endif()
# --- Install -----------------------------------------------------------------
install(TARGETS maze RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
# Man page installs only if it is present.
if(EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/doc/maze.1")
install(FILES doc/maze.1 DESTINATION ${CMAKE_INSTALL_MANDIR}/man1)
endif()
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