Jose Roman Bilbao wrote: > I have noticed that, by default, the C compiler is using flag -g. What > should I indicate in configure.ac to avoid this issue?. Set CFLAGS to something different if you prefer it. If you have a recent autoconf genenerated configure script then this should be done on the command line so that it is recorded in the config.status. But older versions needed it set as an environment variable. ./configure CFLAGS=-O For older configure scripts: CFLAGS=-O ./configure See the --help output for a list of configurable variables. ./configure --help Bob