linux 库编译报错,Linux下编译QT库的时候出现报错：undefined reference to `png_set_longjmp_fn'...
问题：报错如下.obj/release-shared/qpnghandler.o: In function `QPngHandlerPrivate::readPngHeader()':qpnghandler.cpp:(.text+0xbc8): undefined reference to `png_set_longjmp_fn'.obj/release-shared/qpnghandler.o:...
