Alvaro Herrera <alvherre@commandprompt.com> writes:
> I disagree with this change. Debug builds are very useful to have in
> production, and you don't want to be running -O0 there. I have found
> that you can use a src/Makefile.custom like this for those times when you
> want to debug stuff in a particular set of files:
> CFLAGS := $(patsubst -O2,-O0,$(CFLAGS))
> Then you remove the .o files that you want to debug, and rerun make.
FWIW, I only use Makefile.custom for more-or-less-permanent changes to
the build behavior of a particular machine. For one-shot things like
recompiling some particular file(s) at -O0, it's easier to do this:
rm foo.omake PROFILE=-O0reinstall postgres executable
The makefiles automatically add PROFILE at the end of CFLAGS, so you can
inject any compile flag this way --- I think the original intent was to
use it to add -pg for gprof-enabled builds. But it's handy for this.
BTW, if you're hacking Postgres code and don't already have a
"reinstall" script, you need one. Mine is basically
pg_ctl stopcd $PGBLDROOT/src/backendmake install-binpg_ctl start
regards, tom lane