CMakeLists.txt

@@ -23,6 +23,13 @@ if(MINGW)
     set(CMAKE_FIND_LIBRARY_SUFFIXES .a ${CMAKE_FIND_LIBRARY_SUFFIXES}) # This _shouldn't_ be needed, but, anything's possible...
 endif()
 
+option(SAVETOOL_USE_SYSTEM_LIBS "Use system-wide versions of the dependencies instead of the versions provided by submodules." OFF)
+
+if(SAVETOOL_USE_SYSTEM_LIBS)
+    # Generic variables shared by multiple libs that don't provide their own.
+    set(BUILD_SHARED_LIBS OFF CACHE BOOL "" FORCE)
+    set(BUILD_TESTING OFF CACHE BOOL "" FORCE)
+
     set(CORRADE_BUILD_DEPRECATED OFF CACHE BOOL "" FORCE)
     set(CORRADE_BUILD_STATIC ON CACHE BOOL "" FORCE)
     set(CORRADE_BUILD_STATIC_PIC ON CACHE BOOL "" FORCE)
@@ -35,7 +42,6 @@ set(CORRADE_WITH_MAIN ON CACHE BOOL "" FORCE)
     set(CORRADE_UTILITY_USE_ANSI_COLORS ON CACHE BOOL "" FORCE)
     add_subdirectory(third-party/corrade EXCLUDE_FROM_ALL)
 
-set(BUILD_SHARED_LIBS OFF CACHE BOOL "" FORCE)
     set(DIRECTX OFF CACHE BOOL "" FORCE) # We use OpenGL.
     set(SDL_ATOMIC OFF CACHE BOOL "" FORCE)
     set(SDL_CPUINFO OFF CACHE BOOL "" FORCE)
@@ -101,7 +107,6 @@ set(BUILD_TEST_APP OFF CACHE BOOL "" FORCE)
     set(EFSW_INSTALL OFF CACHE BOOL "" FORCE)
     add_subdirectory(third-party/efsw EXCLUDE_FROM_ALL)
 
-set(BUILD_TESTING OFF CACHE BOOL "" FORCE)
     set(BUILD_CURL_EXE OFF CACHE BOOL "" FORCE)
     set(ENABLE_UNICODE ON CACHE BOOL "" FORCE)
     set(ENABLE_INET_PTON OFF CACHE BOOL "" FORCE)
@@ -115,5 +120,6 @@ set(CURL_STATIC_CRT OFF CACHE BOOL "" FORCE)
     set(CURL_USE_SCHANNEL ON CACHE BOOL "" FORCE)
     set(CURL_USE_LIBSSH2 OFF CACHE BOOL "" FORCE) # For some reason, even when HTTP_ONLY is set to ON, libcurl will try to link to libssh2.
     add_subdirectory(third-party/curl EXCLUDE_FROM_ALL)
+endif(SAVETOOL_USE_SYSTEM_LIBS)
 
 add_subdirectory(src)