Is there any way to disable compiler optimization and enable debug?

On 04/08/2012 01:42 PM, clover white wrote:

HI,
I would like to debug PG because I have a problem when I run initdb,
and I have question about the configure file.

when I used the command below to config PG, it was only built with
debugging symbols (-g) and O2 compiler optimization which would lead
to execute order not match the source code order.
./configure --enable-debug --enable-depend --enable-cassert
--prefix=/home/pgsql/pgsql

then I export CFLAGS=O0, but it still couldn't work.
I read a little about confiqure file and find out that CFLAGS is
unset in confiqure.
and CFLAGS is also control by global variable: ac_env_CFLAGS_set and
ac_env_CFLAGS_value.

but i do not know how i could pass ac_env_CFLAGS_set and
ac_env_CFLAGS_value to the configure file.

by now, I replace all the O2 flag to O0 in configure file to resolve
the debug source code order problem temporary.

Is there any other way to disable compiler optimization and enable debug?

Thank you for help.

Try:

CFLAGS=-O0 ./configure --enable-debug ....

cheers

andrew

On sön, 2012-04-08 at 14:47 -0400, Andrew Dunstan wrote:

Try:

CFLAGS=-O0 ./configure --enable-debug ....

Better yet:

./configure CFLAGS=-O0 --enable-debug ....