Add support for cmake

CMakeLists.txt

@@ -0,0 +1,69 @@
+cmake_minimum_required(VERSION 3.18)
+project(grrlib)
+
+include(GNUInstallDirs)
+
+find_package(PkgConfig REQUIRED)
+
+pkg_check_modules(PNG REQUIRED libpng)
+pkg_check_modules(FREETYPE REQUIRED freetype2)
+pkg_check_modules(JPEG REQUIRED libjpeg)
+
+add_library(pngu STATIC)
+
+target_sources(pngu
+  PRIVATE
+  "${CMAKE_CURRENT_SOURCE_DIR}/GRRLIB/lib/pngu/pngu.c"
+)
+
+target_include_directories(pngu
+  PUBLIC
+  "$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/GRRLIB/lib/pngu>"
+  PRIVATE
+  ${PNG_INCLUDE_DIRS}
+)
+
+target_link_libraries(pngu PUBLIC
+  ${PNG_LIBRARIES}
+)
+
+add_library(grrlib STATIC)
+
+target_compile_options(grrlib
+  PRIVATE
+  -Wall
+  -Wshadow
+  -Wunused
+)
+
+file(GLOB_RECURSE GRRLIB_SRC_FILES "${CMAKE_CURRENT_SOURCE_DIR}/GRRLIB/GRRLIB*.c")
+target_sources(grrlib
+  PRIVATE
+  "${GRRLIB_SRC_FILES}"
+)
+
+target_include_directories(grrlib
+  PUBLIC
+  "$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/GRRLIB/GRRLIB>"
+  PRIVATE
+  "$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/GRRLIB/GRRLIB/grrlib>"
+  ${FREETYPE_INCLUDE_DIRS}
+  ${JPEG_INCLUDE_DIRS}
+)
+
+target_link_libraries(grrlib PUBLIC
+  pngu
+)
+
+install(DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/GRRLIB/GRRLIB/"
+  DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
+  FILES_MATCHING PATTERN "*.h"
+)
+
+install(TARGETS pngu
+  ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
+)
+
+install(TARGETS grrlib
+  ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
+)