这个编译警告可以忽略吗？
今天终于把SDL2的库编译出来了，最后有个编译警告。如下，
libtool: link: warning: undefined symbols not allowed in i686-pc-mingw32 shared
libraries
编译环境是mingw gcc 4.62
完整信息如下
*** objectsbuild/version.o is not portable!
Creating library file: build/.libs/libSDL2.dll.a
CC build/SDL_windows_main.lo
LTLINK build/libSDL2main.la
libtool: link: warning: undefined symbols not allowed in i686-pc-mingw32 shared
libraries
CC build/SDL_test_assert.lo
CC build/SDL_test_common.lo
CC build/SDL_test_compare.lo
CC build/SDL_test_crc32.lo
CC build/SDL_test_font.lo
CC build/SDL_test_fuzzer.lo
CC build/SDL_test_harness.lo
CC build/SDL_test_imageBlit.lo
CC build/SDL_test_imageBlitBlend.lo
CC build/SDL_test_imageFace.lo
CC build/SDL_test_imagePrimitives.lo
CC build/SDL_test_imagePrimitivesBlend.lo
CC build/SDL_test_log.lo
CC build/SDL_test_md5.lo
CC build/SDL_test_memory.lo
CC build/SDL_test_random.lo
LTLINK build/libSDL2_test.la
libtool: link: warning: undefined symbols not allowed in i686-pc-mingw32 shared
libraries
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