How to compile without optimizations

[Kuroishi Mitsuo]

  Message-id: <CABhwJwsTYQ2hG5ueGmBXCqpQrvU_2BY6Ooki8kg2AeCUpu9bFg at mail.gmail.com>
  From:       David Rubel <davidrubels at gmail.com>
  Subject:    How to compile without optimizations
  Date:       Wed, 4 Apr 2012 23:49:48 -0430

  > Hello.
  > 
  > Is there a way to compile the ISC DHCP without code optimization?. I tried
  > editing the Makefile created by ./configure, changing in the "CFLAGS" line
  > the "-O2" option to "-O0" or even removing it completely, but then when I
  > Make the output leads me to think that the code it's still being optimized.
  > 
  > For example: the last gcc output is "gcc  -g -O2  -Wall -Werror
  > -fno-strict-aliasing -I../bind/include   -o dhcpd dhcpd-dhcpd.o......".
  > 
  > Also, running the dhclient through GDB shows that the values of some
  > variables/pointers used in a function I created are being optimized ("value
  > optimized out"). I'm getting a Segmentation fault during a malloc to a
  > pointer (only initialized, pointing to NULL) which value is being optimized
  > before the malloc and I'd like to try if compiling without optimizations
  > would fix that problem.
  > 
  > Any help will be greatly appreciated.
  > Thanks.

Hi.

I did ./configure CFLAGS="-g3 -O0" and it seems to be OK.

Regards,

--
Kuroishi Mitsuo