add CMake build option

.github/workflows/ci.yml

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+name: CI for CMake
+
+on:
+  push:
+  pull_request:
+  release:
+    types: [published]
+
+
+jobs:
+
+  unix:
+
+    strategy:
+      matrix:
+        os: [ubuntu-latest]
+# mac, clang etc. work, just saving CI time
+
+    runs-on: ${{ matrix.os }}
+    timeout-minutes: 5
+
+    steps:
+
+    - name: install prereqs (Linux)
+      if: runner.os == 'Linux'
+      run: |
+        sudo apt update
+        sudo apt install --no-install-recommends libxt-dev libxaw7-dev libxpm-dev libxmu-dev libx11-dev
+
+    - name: install prereqs (macOS)
+      if: runner.os == 'macOS'
+      run: brew install libxt libxaw libx11 libxpm libxmu
+
+    - &checkout
+      uses: actions/checkout@v6
+
+    - name: CMake build
+      run: cmake --workflow build
+
+    - name: CMake install (for examples)
+      run: cmake --install build
+
+    - name: CMake example build and test
+      working-directory: demos
+      run: cmake --workflow default
+
+    - &cpack
+      name: Create package
+      if: github.event.action == 'published'
+      run: cpack --config build/CPackConfig.cmake
+
+    - &upload_pkg
+      name: Upload package
+      if: github.event.action == 'published'
+      uses: actions/upload-artifact@v7
+      with:
+        name: ${{ runner.os }}-pkg
+        path: build/package
+
+
+  windows:
+    runs-on: windows-2025-vs2026
+    timeout-minutes: 10
+
+    steps:
+    - *checkout
+
+    - name: CMake build
+      run: cmake --workflow msvc-build
+
+    - name: CMake install (for examples)
+      run: cmake --install build --config Release
+
+    - name: CMake configure examples
+      working-directory: demos
+      run: cmake --preset msvc
+
+    - *cpack
+
+    - *upload_pkg
+
+
+  dos:
+    timeout-minutes: 10
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: open-watcom/setup-watcom@v1
+      with:
+        version: "2.0"
+        target: "dos"
+
+    - *checkout
+
+    - name: CMake build
+      run: cmake --workflow dos
+
+    - name: CMake install (for examples)
+      run: cmake --install build
+
+    # cannot build examples, even locally

CMakeLists.txt

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+cmake_minimum_required(VERSION 3.19...4.3)
+
+if(CMAKE_SOURCE_DIR STREQUAL CMAKE_BINARY_DIR)
+  message(FATAL_ERROR "Please use out-of-source build
+  cmake -B build")
+endif()
+
+project(PDCurses
+LANGUAGES C
+VERSION 3.9
+DESCRIPTION "PDCurses - a curses library for environments that don't fit the termcap/terminfo model."
+HOMEPAGE_URL "https://github.com/wmcbrine/PDCurses")
+
+include(CheckIncludeFile)
+include(CheckSymbolExists)
+
+# --- system config
+option(PDCurses_WIDE "Enable wide-character support" ON)
+option(PDCurses_UTF8 "Enable UTF-8 support")
+option(PDCurses_sdl "Use SDL2")
+option(PDCurses_xaw3d "Use Xaw3d instead of Xaw")
+option(PDCurses_nextaw "Use NeXT Athena widgets instead of Xaw")
+
+include(cmake/compilers.cmake)
+
+add_library(pdcurses pdcurses/addch.c pdcurses/addchstr.c pdcurses/addstr.c
+pdcurses/attr.c pdcurses/beep.c pdcurses/bkgd.c pdcurses/border.c pdcurses/clear.c
+pdcurses/color.c pdcurses/delch.c pdcurses/deleteln.c pdcurses/getch.c
+pdcurses/getstr.c pdcurses/getyx.c pdcurses/inch.c pdcurses/inchstr.c
+pdcurses/initscr.c pdcurses/inopts.c pdcurses/insch.c pdcurses/insstr.c
+pdcurses/instr.c pdcurses/kernel.c pdcurses/keyname.c pdcurses/mouse.c pdcurses/move.c
+pdcurses/outopts.c pdcurses/overlay.c pdcurses/pad.c pdcurses/panel.c pdcurses/printw.c
+pdcurses/refresh.c pdcurses/scanw.c pdcurses/scr_dump.c pdcurses/scroll.c
+pdcurses/slk.c pdcurses/termattr.c pdcurses/touch.c pdcurses/util.c
+pdcurses/window.c pdcurses/debug.c
+)
+set_property(TARGET pdcurses PROPERTY EXPORT_NAME Curses)
+target_include_directories(pdcurses
+PUBLIC
+$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>
+$<INSTALL_INTERFACE:include>
+PRIVATE pdcurses
+)
+target_compile_definitions(pdcurses
+PUBLIC
+$<$<BOOL:${PDCurses_WIDE}>:PDC_WIDE>
+PRIVATE
+$<$<BOOL:${PDCurses_UTF8}>:PDC_FORCE_UTF8>
+$<$<BOOL:${PDCurses_xaw3d}>:USE_XAW3D>
+$<$<BOOL:${PDCurses_nextaw}>:USE_NEXTAW>
+$<$<CONFIG:Debug,RelWithDebugInfo>:PDCDEBUG>
+)
+
+add_library(Curses::Curses ALIAS pdcurses)
+
+check_symbol_exists("vsnprintf" "stdio.h" HAVE_VSNPRINTF)
+check_symbol_exists("vsscanf" "stdio.h" HAVE_VSSCANF)
+
+target_compile_definitions(pdcurses PRIVATE
+$<$<BOOL:${HAVE_VSNPRINTF}>:HAVE_VSNPRINTF>
+$<$<BOOL:${HAVE_VSSCANF}>:HAVE_VSSCANF>
+)
+
+if(PDCurses_sdl)
+  find_package(SDL2 CONFIG REQUIRED)
+
+  target_link_libraries(pdcurses PRIVATE SDL2::SDL2)
+  target_include_directories(pdcurses PRIVATE sdl2)
+
+  target_sources(pdcurses PRIVATE sdl2/pdcclip.c sdl2/pdcdisp.c sdl2/pdcgetsc.c
+    sdl2/pdckbd.c sdl2/pdcscrn.c sdl2/pdcsetsc.c sdl2/pdcutil.c sdl2/pdcsdl.h
+  )
+elseif(WIN32)
+  target_compile_definitions(pdcurses PRIVATE
+  $<$<BOOL:${MSVC}>:_CRT_SECURE_NO_WARNINGS>
+  $<$<BOOL:${BUILD_SHARED_LIBS}>:PDC_DLL_BUILD>
+  )
+  target_include_directories(pdcurses PRIVATE wincon)
+
+  target_sources(pdcurses PRIVATE wincon/pdcclip.c wincon/pdcdisp.c wincon/pdcgetsc.c
+    wincon/pdckbd.c wincon/pdcscrn.c wincon/pdcsetsc.c wincon/pdcutil.c wincon/pdcwin.h
+  )
+elseif(CMAKE_SYSTEM_NAME STREQUAL "DOS")
+  target_sources(pdcurses PRIVATE dos/pdcclip.c dos/pdcdisp.c dos/pdcgetsc.c
+      dos/pdckbd.c dos/pdcscrn.c dos/pdcsetsc.c dos/pdcutil.c)
+  target_include_directories(pdcurses PRIVATE dos)
+else()
+  check_include_file("DECkeySym.h" HAVE_DECKEYSYM_H)
+  check_include_file("Sunkeysym.h" HAVE_SUNKEYSYM_H)
+  check_include_file("unistd.h" HAVE_UNISTD_H)
+  check_symbol_exists("poll" "poll.h" HAVE_POLL)
+  check_symbol_exists("usleep" "unistd.h" HAVE_USLEEP)
+
+  target_compile_definitions(pdcurses PRIVATE
+  $<$<BOOL:${HAVE_DECKEYSYM_H}>:HAVE_DECKEYSYM_H>
+  $<$<BOOL:${HAVE_SUNKEYSYM_H}>:HAVE_SUNKEYSYM_H>
+  $<$<BOOL:${HAVE_UNISTD_H}>:HAVE_UNISTD_H>
+  $<$<BOOL:${HAVE_POLL}>:HAVE_POLL>
+  $<$<BOOL:${HAVE_USLEEP}>:HAVE_USLEEP>
+  )
+
+  include(cmake/x11.cmake)
+
+  target_compile_definitions(pdcurses PRIVATE XCURSES)
+
+  target_include_directories(pdcurses PRIVATE ${X11_INCLUDE_DIR} x11)
+  target_link_libraries(pdcurses PRIVATE X11::X11 X11::Xaw X11::Xt X11::Xpm X11::Xmu)
+
+  target_sources(pdcurses PRIVATE x11/pdcclip.c x11/pdcdisp.c x11/pdcgetsc.c
+    x11/pdckbd.c x11/pdcscrn.c x11/pdcsetsc.c x11/pdcutil.c x11/sb.c x11/scrlbox.c
+    x11/pdcx11.h x11/scrlbox.h
+  )
+endif()
+
+install(TARGETS pdcurses EXPORT ${PROJECT_NAME}-targets)
+install(FILES curses.h panel.h TYPE INCLUDE)
+
+include(cmake/install.cmake)
+
+# --- auto-ignore build directory
+file(GENERATE OUTPUT .gitignore CONTENT "*")

CMakePresets.json

@@ -0,0 +1,90 @@
+{
+  "version": 6,
+
+"configurePresets": [
+{
+  "name": "default",
+  "generator": "Ninja",
+  "binaryDir": "build",
+  "installDir": "${fileDir}/build/local",
+  "cacheVariables": {
+    "CMAKE_BUILD_TYPE": "Release",
+    "CMAKE_COMPILE_WARNING_AS_ERROR": true,
+    "CMAKE_LINK_WARNING_AS_ERROR": true
+  }
+},
+{ "name": "build", "inherits": "default" },
+{ "name": "msvc", "inherits": "default", "generator": "Visual Studio 18 2026" },
+{ "name": "msvc-build", "inherits": "msvc" },
+{ "name": "dos", "generator": "Watcom WMake", "inherits": "default",
+  "toolchainFile": "${sourceDir}/cmake/dos.cmake",
+  "displayName": "OpenWatcom DOS"
+}
+],
+"buildPresets": [
+  { "name": "default", "configurePreset": "default", "configuration": "Release" },
+  { "name": "build", "configurePreset": "build", "inherits": "default" },
+  { "name": "dos", "configurePreset": "dos", "inherits": "default" },
+  { "name": "msvc", "configurePreset": "msvc", "configuration": "Release", "inherits": "default" },
+  { "name": "msvc-build", "inherits": "msvc" }
+],
+"testPresets": [
+{
+  "name": "default",
+  "configurePreset": "default",
+  "configuration": "Release",
+  "output": {
+    "outputOnFailure": true,
+    "verbosity": "verbose"
+  },
+  "execution": {
+    "noTestsAction": "error",
+    "scheduleRandom": true,
+    "stopOnFailure": false,
+    "jobs": 8,
+    "$comment": "don't put 0 or ulimit too many open files failures result"
+  }
+},
+{ "name": "msvc", "configurePreset": "msvc", "inherits": "default" },
+{ "name": "msvc-build", "inherits": "msvc" }
+],
+"workflowPresets": [
+  {
+    "name": "default",
+    "steps": [
+      { "type": "configure", "name": "default" },
+      { "type": "build", "name": "default" },
+      { "type": "test", "name": "default" }
+    ]
+  },
+  {
+    "name": "build",
+    "steps": [
+      { "type": "configure", "name": "default" },
+      { "type": "build", "name": "default" }
+    ]
+  },
+  {
+    "name": "dos",
+    "steps": [
+      { "type": "configure", "name": "dos" },
+      { "type": "build", "name": "dos" }
+    ]
+  },
+  {
+    "name": "msvc-build",
+    "steps": [
+      { "type": "configure", "name": "msvc" },
+      { "type": "build", "name": "msvc" }
+    ]
+  },
+  {
+    "name": "msvc",
+    "steps": [
+      { "type": "configure", "name": "msvc" },
+      { "type": "build", "name": "msvc" },
+      { "type": "test", "name": "msvc" }
+    ]
+  }
+]
+}

cmake/compilers.cmake

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+if(CMAKE_C_COMPILER_ID STREQUAL "OpenWatcom")
+  message(STATUS "OpenWatcom: $ENV{WATCOM}
+  Host: ${CMAKE_HOST_SYSTEM_NAME} ${CMAKE_HOST_SYSTEM_VERSION}
+  Target: ${CMAKE_SYSTEM_NAME} ${CMAKE_SYSTEM_VERSION}
+  ")
+  # https://wiki.archlinux.org/title/Open_Watcom
+  add_compile_options(-bt=dos -bcl=dos)
+endif()

cmake/config.cmake.in

@@ -0,0 +1,10 @@
+@PACKAGE_INIT@
+include(CMakeFindDependencyMacro)
+include(${CMAKE_CURRENT_LIST_DIR}/@PROJECT_NAME@-targets.cmake)
+
+set(PDCurses_X11 @X11_FOUND@)
+if(PDCurses_X11)
+  find_dependency(X11)
+endif()
+
+check_required_components(@PROJECT_NAME@)

cmake/dos.cmake

@@ -0,0 +1,27 @@
+set(CMAKE_SYSTEM_NAME DOS)
+
+if(NOT DEFINED ENV{WATCOM})
+  if(WIN32)
+    set(scr ${CMAKE_CURRENT_LIST_DIR}/dos.ps1)
+  else()
+    set(scr ${CMAKE_CURRENT_LIST_DIR}/dos.sh)
+  endif()
+  message(FATAL_ERROR "WATCOM environment variable not set. Try running ${scr} first.")
+endif()
+
+file(TO_CMAKE_PATH "$ENV{WATCOM}" watcom_root)
+
+set(CMAKE_SYSROOT ${watcom_root})
+
+if(WIN32)
+  set(bin ${watcom_root}/binnt64 ${watcom_root}/binnt)
+else()
+  set(bin ${watcom_root}/binl64 ${watcom_root}/binl)
+endif()
+
+find_program(CMAKE_C_COMPILER
+NAMES wcl386
+HINTS ${bin}
+NO_DEFAULT_PATH
+REQUIRED
+)

cmake/dos.ps1

@@ -0,0 +1,15 @@
+$watcom = "$Env:SYSTEMDRIVE:\WATCOM"
+
+if (!(Test-Path -Path $watcom)) {
+  Throw "OpenWatcom not found at $watcom"
+}
+
+$env:WATCOM = $watcom
+$env:EDPATH = "$watcom\EDDAT"
+$env:WHTMLHELP = "$watcom\BINNT\HELP"
+$env:WIPFC = "$watcom\WIPFC"
+
+$env:LIBPATH = "$watcom\lib386\"
+$env:INCLUDE = "$watcom\H"
+
+$env:Path += ";$watcom\BINNT64;$watcom\BINNT"

cmake/dos.sh

@@ -0,0 +1,15 @@
+#!/bin/sh
+
+watcom="/opt/watcom/"
+
+if [ ! -d $watcom ]; then
+  echo "OpenWatcom not found at $watcom" >&2
+  exit 1
+fi
+
+export WATCOM=$watcom
+export EDPATH="$watcom/eddat"
+export WIPFC="$watcom/wipfc"
+
+export INCLUDE="$watcom/h"
+export PATH="$watcom/binl64:$watcom/binl:$PATH"