1 files changed, 72 insertions, 8 deletions
diff --git a/CMakeLists.txt b/CMakeLists.txt
index c6617f8..b50c204 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,14 +1,78 @@
 cmake_minimum_required(VERSION 3.15)
-project(maze VERSION 0.9)
+project(maze VERSION 0.9 LANGUAGES C)
 
-set(CURSES_NEED_WIDE TRUE)
-find_package(Curses REQUIRED)
-set(CMAKE_CXX_FLAGS "-D_DEFAULT_SOURCE -D_XOPEN_SOURCE=600")
-include_directories(${CURSES_INCLUDE_DIR})
+set(CMAKE_C_STANDARD 11)
+set(CMAKE_C_STANDARD_REQUIRED ON)
 
-file(GLOB_RECURSE maze_SRC CONFIGURE_DEPENDS "src/*")
+# --- 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/)
-target_link_libraries(maze ${CURSES_LIBRARIES})
+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()