symlinking library headers for better portability

engine/CMakeLists.txt

@@ -0,0 +1,56 @@
+cmake_minimum_required(VERSION 3.20)
+set(CMAKE_CXX_FLAGS "-std=c++17 -Wno-error")
+
+file(GLOB_RECURSE ENGINE_SOURCES CONFIGURE_DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/src/*.cpp")
+add_custom_command(OUTPUT "${CMAKE_BINARY_DIR}/force_rebuild"
+        COMMAND rm -f "${CMAKE_SOURCE_DIR}/link/libenginend.so"
+        COMMAND rm -rf "${CMAKE_SOURCE_DIR}/include/enginend"
+)
+add_library(enginend SHARED ${ENGINE_SOURCES} "${CMAKE_BINARY_DIR}/force_rebuild"
+        ../include/json.h)
+target_link_directories(
+        enginend PUBLIC
+        "${CMAKE_SOURCE_DIR}/link")
+set(ENGINE_SRC_DIR "${CMAKE_CURRENT_SOURCE_DIR}/src")
+set(ENGINE_EXPORT_DIR "${CMAKE_SOURCE_DIR}/include/enginend")
+set_target_properties(enginend PROPERTIES
+        CMAKE_LIBRARY_OUTPUT_DIRECTORY "${CMAKE_SOURCE_DIR}/link"
+        ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_SOURCE_DIR}/link"
+        LIBRARY_OUTPUT_DIRECTORY "${CMAKE_SOURCE_DIR}/link"
+        RUNTIME_OUTPUT_DIRECTORY "${CMAKE_SOURCE_DIR}/link"
+)
+
+file(GLOB_RECURSE HEADER_FILES CONFIGURE_DEPENDS "${ENGINE_SRC_DIR}/*.h" "${ENGINE_SRC_DIR}/*.hpp")
+foreach(HEADER ${HEADER_FILES})
+    file(RELATIVE_PATH REL_PATH "${ENGINE_SRC_DIR}" "${HEADER}")
+
+    set(DEST "${ENGINE_EXPORT_DIR}/${REL_PATH}")
+
+    get_filename_component(DEST_DIR "${DEST}" DIRECTORY)
+
+    add_custom_command(
+            TARGET enginend PRE_BUILD
+            COMMAND ${CMAKE_COMMAND} -E make_directory "${DEST_DIR}"
+            COMMAND ${CMAKE_COMMAND} -E copy_if_different "${HEADER}" "${DEST}"
+    )
+endforeach()
+
+
+add_executable(test test.cpp)
+
+set_target_properties(test PROPERTIES
+        RUNTIME_OUTPUT_DIRECTORY "${CMAKE_SOURCE_DIR}/engine/test"
+)
+target_link_directories(
+        test PUBLIC
+        "${CMAKE_SOURCE_DIR}/link")
+target_link_libraries(test PRIVATE
+        "${CMAKE_SOURCE_DIR}/link/libenginend.so"
+)
+target_include_directories(test PUBLIC
+        ${CMAKE_SOURCE_DIR}/include
+)
+target_include_directories(enginend PUBLIC
+        ${CMAKE_SOURCE_DIR}/include
+
+)