adding CMakeLists.txt

CMakeLists.txt

@@ -0,0 +1,61 @@
+cmake_minimum_required(VERSION 3.3.2)
+
+project(LodePNG)
+
+include(GenerateExportHeader)
+find_package(SDL)
+include_directories(${CMAKE_SOURCE_DIR} ${CMAKE_BINARY_DIR})
+file(GLOB_RECURSE SOURCES *.cpp)
+
+set(LIBRARIES lodepng lodepng_util)
+foreach(LIBRARY ${LIBRARIES})
+  add_library(${LIBRARY} ${LIBRARY}.cpp)
+  if (NOT LIBRARY STREQUAL "lodepng")
+    target_link_libraries(${LIBRARY} lodepng)
+  else ()
+    generate_export_header(${LIBRARY})
+  endif ()
+  install(TARGETS ${LIBRARY}
+    RUNTIME DESTINATION bin
+    LIBRARY DESTINATION lib
+    ARCHIVE DESTINATION lib)
+endforeach()
+
+string(LENGTH ${CMAKE_SOURCE_DIR} LENGTH_CMAKE_SOURCE_DIR)
+set(SDL_DEPENDENT  example_opengl example_sdl lodepng_benchmark)
+set(UTIL_DEPENDENT lodepng_unittest pngdetail)
+enable_testing()
+
+foreach(SOURCE ${SOURCES})
+  string(SUBSTRING ${SOURCE} ${LENGTH_CMAKE_SOURCE_DIR} -1 EXECUTABLE_NAME)
+  string(REPLACE ".cpp" "" EXECUTABLE_NAME ${EXECUTABLE_NAME})
+  string(REPLACE "/examples/" "" EXECUTABLE_NAME ${EXECUTABLE_NAME})
+  string(REPLACE "/" "" EXECUTABLE_NAME ${EXECUTABLE_NAME})
+
+  if (NOT ${EXECUTABLE_NAME} IN_LIST LIBRARIES)
+    set(LINK_LIBRARIES lodepng)
+    if (EXECUTABLE_NAME IN_LIST UTIL_DEPENDENT)
+      list(APPEND LINK_LIBRARIES lodepng_util)
+    endif()
+    if (EXECUTABLE_NAME IN_LIST SDL_DEPENDENT)
+      if (NOT SDL_FOUND)
+	continue()
+      endif()
+      list(APPEND LINK_LIBRARIES ${SDL_LIBRARY})
+      list(APPEND INCLUDE_DIRS   ${SDL_INCLUDE_DIR})
+    endif()
+
+    add_executable(${EXECUTABLE_NAME} ${SOURCE})
+    if (INCLUDE_DIRS)
+      target_include_directories(${EXECUTABLE_NAME} PUBLIC ${INCLUDE_DIRS})
+    endif()
+    target_link_libraries(${EXECUTABLE_NAME} ${LINK_LIBRARIES})
+    add_test(NAME ${EXECUTABLE_NAME} COMMAND $<TARGET_FILE:${EXECUTABLE_NAME}>)
+    install(TARGETS ${EXECUTABLE_NAME} RUNTIME DESTINATION bin)
+  endif()
+endforeach()
+
+install(FILES ${CMAKE_BINARY_DIR}/lodepng_export.h lodepng.h lodepng_util.h DESTINATION include)
+
+include(InstallRequiredSystemLibraries)
+include(CPack)

lodepng.h

@@ -84,6 +84,7 @@ source files with custom allocators.*/
 #ifdef LODEPNG_COMPILE_CPP
 #include <vector>
 #include <string>
+#include <lodepng_export.h>
 #endif /*LODEPNG_COMPILE_CPP*/
 
 #ifdef LODEPNG_COMPILE_PNG
@@ -271,7 +272,7 @@ struct LodePNGDecompressSettings
   const void* custom_context; /*optional custom settings for custom functions*/
 };
 
-extern const LodePNGDecompressSettings lodepng_default_decompress_settings;
+extern LODEPNG_EXPORT const LodePNGDecompressSettings lodepng_default_decompress_settings;
 void lodepng_decompress_settings_init(LodePNGDecompressSettings* settings);
 #endif /*LODEPNG_COMPILE_DECODER*/
 
@@ -305,7 +306,7 @@ struct LodePNGCompressSettings /*deflate = compress*/
   const void* custom_context; /*optional custom settings for custom functions*/
 };
 
-extern const LodePNGCompressSettings lodepng_default_compress_settings;
+extern LODEPNG_EXPORT const LodePNGCompressSettings lodepng_default_compress_settings;
 void lodepng_compress_settings_init(LodePNGCompressSettings* settings);
 #endif /*LODEPNG_COMPILE_ENCODER*/