CFLAGS+=-Wall -Werror -fno-builtin -static -g
PROGS=libcstrlen
ARCH!=uname -m
.if ${ARCH} == i386
PROGS+=asmstrlen
.endif
PROGS+=basestrlen strlen strlen2

all: ${PROGS}

# Just link against libc.
libcstrlen: main.c
	gcc ${CFLAGS} -o ${.TARGET} ${.ALLSRC}

# Assembly version of strlen pulled out of libc.
asmstrlen: main.c strlen.S
	gcc -DTESTLEN ${CFLAGS} -o ${.TARGET} ${.ALLSRC}

# C version of strlen pulled out of libc.
basestrlen: main.c basestrlen.c
	gcc -DTESTLEN ${CFLAGS} -o ${.TARGET} ${.ALLSRC}

# Word-searching version of strlen.  Original version.
strlen: main.c strlen.c
	gcc -DTESTLEN ${CFLAGS} -o ${.TARGET} ${.ALLSRC}

# Word-searching version of strlen.  Simpler to read and about the same speed.
strlen2: main.c strlen2.c
	gcc -DTESTLEN ${CFLAGS} -o ${.TARGET} ${.ALLSRC}

# Generate random strings for testing but only during testing.
.ifmake test
STRLENS=1 2 3 4 5 6 7 8 9 10 14 16 18 32 64 256
.for ndx in ${STRLENS}
STR[${ndx}]!=jot -r -c ${ndx} a z | rs -g 0 ${ndx}
.endfor
.endif

# Test increasing lengths of strings against each program.
test: ${PROGS}
.for prog in ${PROGS}
.for ndx in ${STRLENS}
	@./${prog} ${STR[${ndx}]}
.endfor
	@echo ""
.endfor

clean:
	rm -f *.o *~ ${PROGS} *.core *.gmon