Re: 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