<fix, refactor, feat> adjust the project configuration

1. Fix possible problems with mac compilation
2. Add new third-party dependency libconfig
3. Use the correct project configuration to specify the C++ standard

3 files changed, 53 insertions, 43 deletions

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 45f28421..0769f11a 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -253,6 +253,7 @@ if (APPLICATION_BUILD)
 
 endif ()
 
+# link options for GpgFrontend
 if (APPLICATION_BUILD)
     target_link_libraries(${AppName} gpgfrontend_ui)
     IF (MINGW)
@@ -260,52 +261,54 @@ if (APPLICATION_BUILD)
         target_link_libraries(${AppName} crypto)
     elseif (APPLE)
         message(STATUS "Link Application Static Library For macOS")
-        target_link_libraries(${AppName} crypto intl)
+        target_link_libraries(${AppName} intl)
     else ()
         message(STATUS "Link Application Static Library For Linux")
         target_link_libraries(${AppName} crypto pthread)
     endif ()
 endif ()
 
-if (LINUX_INSTALL_SOFTWARE)
-    if (LINUX)
-        if (INSTALL_GPGFRONTEND_APP)
-            install(TARGETS ${AppName}
-                    EXPORT GpgFrontendTargets
-                    RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
-                    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
-                    ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
-                    )
-            install(FILES ${CMAKE_SOURCE_DIR}/TRANSLATORS
-                    DESTINATION /usr/local/share/${AppName}/)
-            install(FILES ${CMAKE_SOURCE_DIR}/resource/meta/pub.gpgfrontend.gpgfrontend.appdata.xml
-                    DESTINATION /usr/share/metainfo/)
-            install(DIRECTORY ${CMAKE_SOURCE_DIR}/resource/desktop/
-                    DESTINATION /usr/share/applications/)
-            install(DIRECTORY ${CMAKE_SOURCE_DIR}/resource/pixmaps/
-                    DESTINATION /usr/share/pixmaps/)
-            install(DIRECTORY ${CMAKE_SOURCE_DIR}/resource/hicolor/
-                    DESTINATION /usr/share/icons/hicolor/)
-        endif ()
-        if (MULTI_LANG_SUPPORT)
-            install(DIRECTORY ${LOCALE_OUTPUT_PATH}/
-                    DESTINATION ${CMAKE_INSTALL_FULL_LOCALEDIR})
-        endif ()
-        if (APP_PACKAGE_DEB)
-            message(STATUS "Configure Deb Package")
-            SET(CPACK_GENERATOR "DEB")
-            set(CPACK_INSTALL_PREFIX "/usr/local/")
-            set(CPACK_PACKAGE_NAME "gpgfrontend")
-            set(CPACK_DEBIAN_PACKAGE_NAME "gpgfrontend")
-            set(CPACK_DEBIAN_PACKAGE_ARCHITECTURE "amd64")
-            set(CPACK_PACKAGE_CONTACT "[email protected]")
-            SET(CPACK_DEBIAN_PACKAGE_MAINTAINER "Saturneric")
-            set(CPACK_DEBIAN_PACKAGE_DEPENDS "gpg (>= 2.2), libqt5core5a (>= 5.9), libqt5gui5 (>= 5.9), libqt5widgets5 (>= 5.9), libqt5network5 (>= 5.9), libqt5printsupport5 (>= 5.9), libconfig++-dev (>=1.5)")
-            set(CPACK_PACKAGE_VERSION_MAJOR "${PROJECT_VERSION_MAJOR}")
-            set(CPACK_PACKAGE_VERSION_MINOR "${PROJECT_VERSION_MINOR}")
-            set(CPACK_PACKAGE_VERSION_PATCH "${PROJECT_VERSION_PATCH}")
-            include(CPack)
-        endif ()
+# using c++ standard 17
+target_compile_features(${AppName} PUBLIC cxx_std_17)
+
+# if building linux package
+if (LINUX AND LINUX_INSTALL_SOFTWARE)
+    if (INSTALL_GPGFRONTEND_APP)
+        install(TARGETS ${AppName}
+                EXPORT GpgFrontendTargets
+                RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
+                LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
+                ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
+                )
+        install(FILES ${CMAKE_SOURCE_DIR}/TRANSLATORS
+                DESTINATION /usr/local/share/${AppName}/)
+        install(FILES ${CMAKE_SOURCE_DIR}/resource/meta/pub.gpgfrontend.gpgfrontend.appdata.xml
+                DESTINATION /usr/share/metainfo/)
+        install(DIRECTORY ${CMAKE_SOURCE_DIR}/resource/desktop/
+                DESTINATION /usr/share/applications/)
+        install(DIRECTORY ${CMAKE_SOURCE_DIR}/resource/pixmaps/
+                DESTINATION /usr/share/pixmaps/)
+        install(DIRECTORY ${CMAKE_SOURCE_DIR}/resource/hicolor/
+                DESTINATION /usr/share/icons/hicolor/)
+    endif ()
+    if (MULTI_LANG_SUPPORT)
+        install(DIRECTORY ${LOCALE_OUTPUT_PATH}/
+                DESTINATION ${CMAKE_INSTALL_FULL_LOCALEDIR})
+    endif ()
+    if (APP_PACKAGE_DEB)
+        message(STATUS "Configure Deb Package")
+        SET(CPACK_GENERATOR "DEB")
+        set(CPACK_INSTALL_PREFIX "/usr/local/")
+        set(CPACK_PACKAGE_NAME "gpgfrontend")
+        set(CPACK_DEBIAN_PACKAGE_NAME "gpgfrontend")
+        set(CPACK_DEBIAN_PACKAGE_ARCHITECTURE "amd64")
+        set(CPACK_PACKAGE_CONTACT "[email protected]")
+        SET(CPACK_DEBIAN_PACKAGE_MAINTAINER "Saturneric")
+        set(CPACK_DEBIAN_PACKAGE_DEPENDS "gpg (>= 2.2), libqt5core5a (>= 5.9), libqt5gui5 (>= 5.9), libqt5widgets5 (>= 5.9), libqt5network5 (>= 5.9), libqt5printsupport5 (>= 5.9), libconfig++-dev (>=1.5)")
+        set(CPACK_PACKAGE_VERSION_MAJOR "${PROJECT_VERSION_MAJOR}")
+        set(CPACK_PACKAGE_VERSION_MINOR "${PROJECT_VERSION_MINOR}")
+        set(CPACK_PACKAGE_VERSION_PATCH "${PROJECT_VERSION_PATCH}")
+        include(CPack)
     endif ()
 endif ()
 
diff --git a/src/core/CMakeLists.txt b/src/core/CMakeLists.txt
index 79f2bdc4..a72a1bf3 100644
--- a/src/core/CMakeLists.txt
+++ b/src/core/CMakeLists.txt
@@ -49,8 +49,9 @@ target_link_libraries(gpgfrontend_core OpenSSL::SSL OpenSSL::Crypto)
 target_link_libraries(gpgfrontend_core QtAES)
 # link vmime
 if (NOT LINUX)
+    # macOS
     target_link_libraries(gpgfrontend_core
-            gpgfrontend_vmime ssl crypto intl iconv)
+            gpgfrontend_vmime intl iconv)
     if (MINGW)
         target_link_libraries(gpgfrontend_core ws2_32)
     endif ()
@@ -76,11 +77,13 @@ target_precompile_headers(gpgfrontend_core
         PUBLIC ${CMAKE_SOURCE_DIR}/src/GpgFrontend.h
         PUBLIC GpgFrontendCore.h)
 
+# using std c++ 17
+target_compile_features(gpgfrontend_core PUBLIC cxx_std_17)
+
 # link for different platforms
 if (MINGW)
     message(STATUS "Link GPG Static Library For MINGW")
     target_link_libraries(gpgfrontend_core wsock32)
-    target_compile_features(gpgfrontend_core PUBLIC cxx_std_17)
 elseif (APPLE)
     message(STATUS "Link GPG Static Library For macOS")
     target_link_libraries(gpgfrontend_core dl)
diff --git a/src/ui/CMakeLists.txt b/src/ui/CMakeLists.txt
index 12810174..001a776d 100644
--- a/src/ui/CMakeLists.txt
+++ b/src/ui/CMakeLists.txt
@@ -57,8 +57,9 @@ target_link_libraries(gpgfrontend_ui
 
 # link vmime
 if (NOT LINUX)
+    # macOS
     target_link_libraries(gpgfrontend_ui
-            gpgfrontend_vmime ssl crypto intl iconv)
+            gpgfrontend_vmime intl iconv)
     if (MINGW)
         target_link_libraries(gpgfrontend_ui ws2_32)
     endif ()
@@ -81,6 +82,9 @@ target_precompile_headers(gpgfrontend_ui PUBLIC GpgFrontendUI.h)
 target_include_directories(gpgfrontend_ui PUBLIC
         ${CMAKE_CURRENT_BINARY_DIR}/gpgfrontend_ui_autogen/include)
 
+# using std c++ 17
+target_compile_features(gpgfrontend_ui PUBLIC cxx_std_17)
+
 # for xcode archive build
 if (XCODE_BUILD)
     set_target_properties(gpgfrontend_ui