* bug#6538: Removal of C_DEBUG_SWITCH changes CFLAGS
@ 2010-06-30 3:00 Glenn Morris
2010-06-30 5:56 ` Dan Nicolaescu
0 siblings, 1 reply; 4+ messages in thread
From: Glenn Morris @ 2010-06-30 3:00 UTC (permalink / raw)
To: 6538
Package: emacs
Configuring Emacs 23.2 on Solaris 2.10 with a non-GNU cc, one gets
generated Makefiles containing:
CFLAGS=-g -O
Configuring the current trunk, one gets
CFLAGS=
The cause appears to be the removal of C_DEBUG_SWITCH.
It is possible other platforms are affected, I did not check (likewise
with LIBS_DEBUG).
The configure logic (faithfully inherited from cpp) is weird. Eg
C_OPTIMIZE_SWITCH goes unused with non-GNU compilers.
^ permalink raw reply [flat|nested] 4+ messages in thread
* bug#6538: Removal of C_DEBUG_SWITCH changes CFLAGS
2010-06-30 3:00 bug#6538: Removal of C_DEBUG_SWITCH changes CFLAGS Glenn Morris
@ 2010-06-30 5:56 ` Dan Nicolaescu
2010-06-30 6:37 ` Glenn Morris
0 siblings, 1 reply; 4+ messages in thread
From: Dan Nicolaescu @ 2010-06-30 5:56 UTC (permalink / raw)
To: Glenn Morris; +Cc: 6538-done
Glenn Morris <rgm@gnu.org> writes:
> Package: emacs
>
> Configuring Emacs 23.2 on Solaris 2.10 with a non-GNU cc, one gets
> generated Makefiles containing:
>
> CFLAGS=-g -O
>
> Configuring the current trunk, one gets
>
> CFLAGS=
>
> The cause appears to be the removal of C_DEBUG_SWITCH.
> It is possible other platforms are affected, I did not check (likewise
> with LIBS_DEBUG).
LIBS_DEBUG was just -lg, it can be safely ignored.
>
> The configure logic (faithfully inherited from cpp) is weird. Eg
> C_OPTIMIZE_SWITCH goes unused with non-GNU compilers.
Not anymore.
C_DEBUG_SWITCH was weird, it used to specify optimization flags too,
that's probably why C_OPTIMIZE_SWITCH is unused.
C_DEBUG_SWITCH was just -g -O for all platforms that bothered to set it.
We get that anyway for non-GCC compilers.
^ permalink raw reply [flat|nested] 4+ messages in thread
* bug#6538: Removal of C_DEBUG_SWITCH changes CFLAGS
2010-06-30 5:56 ` Dan Nicolaescu
@ 2010-06-30 6:37 ` Glenn Morris
2010-06-30 7:27 ` Dan Nicolaescu
0 siblings, 1 reply; 4+ messages in thread
From: Glenn Morris @ 2010-06-30 6:37 UTC (permalink / raw)
To: Dan Nicolaescu; +Cc: 6538
Dan Nicolaescu wrote:
> C_DEBUG_SWITCH was weird, it used to specify optimization flags too,
> that's probably why C_OPTIMIZE_SWITCH is unused.
Yes, it was all very weird...
> C_DEBUG_SWITCH was just -g -O for all platforms that bothered to set it.
What about irix6-5: "-g3 -O -OPT:Olimit=3500".
> We get that anyway for non-GCC compilers.
I noticed that AC_PROG_CC tests for -g, and adds it to CFLAGS if
supported. It also adds -O2 when using gcc. Perhaps this could be used
to further simplify configure.in...
^ permalink raw reply [flat|nested] 4+ messages in thread
* bug#6538: Removal of C_DEBUG_SWITCH changes CFLAGS
2010-06-30 6:37 ` Glenn Morris
@ 2010-06-30 7:27 ` Dan Nicolaescu
0 siblings, 0 replies; 4+ messages in thread
From: Dan Nicolaescu @ 2010-06-30 7:27 UTC (permalink / raw)
To: Glenn Morris; +Cc: 6538
Glenn Morris <rgm@gnu.org> writes:
> Dan Nicolaescu wrote:
>
>> C_DEBUG_SWITCH was just -g -O for all platforms that bothered to set it.
>
> What about irix6-5: "-g3 -O -OPT:Olimit=3500".
IMO it's not worth the complication.
>> We get that anyway for non-GCC compilers.
>
> I noticed that AC_PROG_CC tests for -g, and adds it to CFLAGS if
> supported. It also adds -O2 when using gcc. Perhaps this could be used
> to further simplify configure.in...
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2010-06-30 7:27 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz follow: Atom feed
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2010-06-30 3:00 bug#6538: Removal of C_DEBUG_SWITCH changes CFLAGS Glenn Morris
2010-06-30 5:56 ` Dan Nicolaescu
2010-06-30 6:37 ` Glenn Morris
2010-06-30 7:27 ` Dan Nicolaescu
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