I answer myself: RTMF :) "If using the GNU C compiler, set shell variable GCC to ‘yes’. If output variable CFLAGS was not already set, set it to -g -O2 for the GNU C compiler (-O2 on systems where GCC does not accept -g), or -g for other compilers. If your package does not like this default, then it is acceptable to insert the line ‘: ${CFLAGS=""}’ after AC_INIT and before AC_PROG_CC to select an empty default instead. " http://www.gnu.org/software/hello/manual/autoconf/C-Compiler.html HTH 2011/1/21 Sergio Belkin <sebelk@xxxxxxxxx>: > Hi, > > Let's say we'd want to compile with CXXFLAGS=-O3. The problem is that > is set in some way as -O2. I've overriden CXXFLAGS on configura.ac > setting: > > CXXFLAGS="-O3 ${CXXFLAGS}" > > But I wonder if that is the proper way of do it! > > I'm using Fedora 14. > > Any idea? > > Thanks in advance! > > -- > -- > Sergio Belkin http://www.sergiobelkin.com > Watch More TV http://sebelk.blogspot.com > LPIC-2 Certified > -- -- Sergio Belkin http://www.sergiobelkin.com Watch More TV http://sebelk.blogspot.com LPIC-2 Certified _______________________________________________ Autoconf mailing list Autoconf@xxxxxxx http://lists.gnu.org/mailman/listinfo/autoconf