gcc -lm -Wall -pedantic -o unblock_jpeg costella_base.c costella_image.c costella_image_chrominance.c costella_image_convert.c costella_jpeg.c costella_unblock.c costella_wrap.c unblock_jpeg.c jcapimin.c jcapistd.c jccoefct.c jccolor.c jcdctmgr.c jchuff.c jcinit.c jcmainct.c jcmarker.c jcmaster.c jcomapi.c jcparam.c jcphuff.c jcprepct.c jcsample.c jctrans.c jdapimin.c jdapistd.c jdatadst.c jdatasrc.c jdcoefct.c jdcolor.c jddctmgr.c jdhuff.c jdinput.c jdmainct.c jdmarker.c jdmaster.c jdmerge.c jdphuff.c jdpostct.c jdsample.c jdtrans.c jerror.c jfdctflt.c jfdctfst.c jfdctint.c jidctflt.c jidctfst.c jidctint.c jidctred.c jmemansi.c jmemmgr.c jquant1.c jquant2.c jutils.c