On Sun, Sep 07, 2014 at 02:03:35PM -0700, Sean Bruno wrote:
> make[4]: "/home/sbruno/bsd/fbsd_head/sys/modules/if_gif/Makefile" line
> 12: warning: Couldn't read shell's output for
> "cat 
> /home/sbruno/bsd/obj/mips/mips.mips/home/sbruno/bsd/fbsd_head/sys/WZR-300HP/opt_inet6.h"
> Shouldn't this cat be done in a saner way?

This is done quite often throughout the tree, and bmake(1) does not like
it when there is no value assigned from the '!=' expansion.

The fix I've seen most commonly done is to echo a newline after the
assignment, such as:

Index: sys/modules/if_gif/Makefile
--- sys/modules/if_gif/Makefile (revision 271215)
+++ sys/modules/if_gif/Makefile (working copy)
@@ -9,7 +9,7 @@ KMOD=   if_gif
 SRCS=  if_gif.c in_gif.c opt_inet.h opt_inet6.h opt_mrouting.h
 .if defined(KERNBUILDDIR)
-OPT_INET6!= cat ${KERNBUILDDIR}/opt_inet6.h
+OPT_INET6!= cat ${KERNBUILDDIR}/opt_inet6.h; echo
 .if empty(OPT_INET6)


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