Re: bsd.lib.mk question

[Masao Uebayashi <uebayasi%gmail.com@localhost>]

On Mon, Jun 6, 2011 at 3:50 PM, David Laight <david%l8s.co.uk@localhost> wrote:
> On Mon, Jun 06, 2011 at 12:58:53AM +0000, David Holland wrote:
>> Does anyone know why bsd.lib.mk contains the following logic?
>>
>>    _YLSRCS=        ${SRCS:M*.[ly]:C/\..$/.c/} ${YHEADER:D${SRCS:M*.y:.y=.h}}
>>       :
>>    DPSRCS+=        ${_YLSRCS}
>>       :
>>    ${STOBJS} ${POBJS} ${GOBJS} ${SOBJS} ${LOBJS}: ${DPSRCS}
>>
>> It appears that this forces a complete recompile any time a .l or .y
>> file is touched, which seems entirely wrong.
>
> Might be to ensure anything that depends on the generated .h file
> is recompiled - working around the fact that make has no syntax
> for having one set of commands generate 2 files.

And I still think GENCMD is the answer for this. :)