Crank WARNS.

Cast sizeof() to (int), as it's being compared against an int, not a size_t.
If i is changed to a size_t, it means the logic must be slightly changed later
in the flow, where --i is checked to be >= 0.  I am not sure I want to make a
logic change to account for clearing up a warning, when an aesthetic one will
keep from modifying the logic.

Other harmless casts, that I think I've made in the right directions.

Make gpbc() an inline function, rather than an obfuscated macro, make its
scratch space local, rather than global.  The previous macro used a dirty
hack (logical AND in place of a conditional) which would lead GCC to throw
a fit (rightly so) as the logical check, as well as the incrementation of
a variable, were not used for anything.

const'ify a few places where gcc3 yells. xstrdup() some global consts in
places where we xstrdup() when not using consts, but tried to assign them
to non-consts before.

Don't use execv(2) if we don't have the kind of arguments it wants.

Reviewed by:    asmodai obrien tjr
Submitted by:   tjr (a gcc3 build log)

1 files changed, 1 insertions, 0 deletions

diff --git a/usr.bin/m4/Makefile b/usr.bin/m4/Makefile
index cc54a0e..6381ad3 100644
--- a/usr.bin/m4/Makefile
+++ b/usr.bin/m4/Makefile
@@ -8,6 +8,7 @@ PROG=	m4
 CFLAGS+=-DEXTENDED
 
 SRCS=	eval.c expr.c look.c main.c misc.c gnum4.c trace.c
+WARNS?=	2
 MAN=	m4.1
 
 .include <bsd.prog.mk>