Hubert,

Thanks for noticing that this doesn't work in our shell and fixing
our tree quickly.  I had been cross compiling and therefore didn't
notice the problem.

However, I did consult the SUSv3 before making this change.  It would
appear that our shell is out of spec.

From the SUSv3 on arithmetic expansion in the shell:
  "Only the decimal-constant, octal-constant, and hexadecimal-constant
  constants specified in the ISO C standard, Section 6.4.4.1 are
  required to be recognized as constants."

I will file a PR about the shell bug.

Thanks,
Darrin

Hubert Feyrer <hubert.feyrer@informatik.fh-regensburg.de> writes:

> Regarding the recent problems in sys/arch/i386/stand/mbr/Makefile.mbr that
> arise because our /bin/sh doesn't want to properly convert a hex value
> into a decimal value (" echo $(( 0xdeadbeef )) "), below's a possible
> solution that uses nm(1) to do the conversion to dec.
> 
> Problem is that it uses sed(1) to strip leading zeroes, and I'm not sure
> that's ok. At least there is no $(SED) macro defined, is it ok to use
> sed(1) in that way? (Thinking about cross builds...)
> 
> 
>  - Hubert
> 
> Index: Makefile.mbr
> ===================================================================
> RCS file: /cvsroot/src/sys/arch/i386/stand/mbr/Makefile.mbr,v
> retrieving revision 1.2
> diff -u -r1.2 Makefile.mbr
> --- Makefile.mbr        2003/05/05 02:47:42     1.2
> +++ Makefile.mbr        2003/05/05 13:16:01
> @@ -26,8 +26,8 @@
> 
>  ${PROG}: ${OBJS}
>         ${LD} -o ${PROG}.tmp ${LDFLAGS} -Ttext 0x600 ${OBJS}
> -       @ set -- $$( ${NM} -t x ${PROG}.tmp | grep '\<mbr_space\>' ); \
> -               echo "#### There are $$((0x$$1)) free bytes in ${PROG}"
> +       @ set -- $$( ${NM} -t d ${PROG}.tmp | grep '\<mbr_space\>' | sed 's/^0*//' ); \
> +               echo "#### There are $$1 free bytes in ${PROG}"
>         ${OBJCOPY} -O binary ${PROG}.tmp ${PROG}
>         rm -f ${PROG}.tmp
> 
> -- 
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