给nios2的Gcc添加一个libjpeg，虽然装上了但总是报错……

xiaodaoren

/tmp/cc4aJtAS.o(.text+0x20): undefined reference to `jpeg_std_error'
/tmp/cc4aJtAS.o(.text+0x3c): undefined reference to `jpeg_CreateCompress'
/tmp/cc4aJtAS.o(.text+0x88): undefined reference to `jpeg_stdio_dest'
/tmp/cc4aJtAS.o(.text+0xbc): undefined reference to `jpeg_set_defaults'
/tmp/cc4aJtAS.o(.text+0xd0): undefined reference to `jpeg_set_quality'
/tmp/cc4aJtAS.o(.text+0xe0): undefined reference to `jpeg_start_compress'
/tmp/cc4aJtAS.o(.text+0x140): undefined reference to `jpeg_write_scanlines'
/tmp/cc4aJtAS.o(.text+0x168): undefined reference to `jpeg_finish_compress'
/tmp/cc4aJtAS.o(.text+0x17c): undefined reference to `jpeg_destroy_compress'