-CFLAGS=/noopt/debug/include=([],[-.include])/warnings=disable=(missingreturn)/name=(as_is,shortened)/define=(HAVE_CONFIG_H=1)/prefix=(all,except=("getopt","optarg","optopt","optind","opterr"))
+OPT=/noopt/debug/warnings=disable=(missingreturn)
+CFLAGS=$(OPT)/include=([],[-.include])/name=(as_is,shortened)\
+ /define=(HAVE_CONFIG_H=1)\
+ /prefix=(all,except=("getopt","optarg","optopt","optind","opterr"))