misspiggy$ make -f bs.mk
cc -O -c atof.c
atof.c:38: Lvalue required
atof.c:38: Expression syntax
atof.c:38: Statement syntax
atof.c:47: External definition syntax
atof.c:49: exp undefined; func. negexp
atof.c:52: External definition syntax
atof.c:53: rv undefined; func. negexp
atof.c:53: nfl undefined; func. negexp
atof.c:53: flexp undefined; func. negexp
atof.c:55: fl undefined; func. negexp
atof.c:56: External definition syntax
atof.c:57: fl undefined; func. negexp
atof.c:57: flexp undefined; func. negexp
atof.c:59: huge undefined; func. negexp
atof.c:61: neg undefined; func. rv
atof.c:61: (Warning only)
atof.c:61: fl undefined; func. rv
atof.c:61: (Warning only)
atof.c:62: Expression syntax
atof.c:64: External definition syntax
atof.c:65: Too many }'s
*** Error code 1

Stop.