[pisa-src] Re: r2298 - in trunk: configure.ac libpisa/arp.c libpisa/debug.h libpisa/global.h libpisa/hitlist.c libpisa/nat.c libpisa/sysdep_fw.c libpisa/sysdep_tun.c pairing/libconfig_wrapper.c pairing/packet_han...
- From: Mircea Gherzan <mircea.gherzan@xxxxxxxxxxxxxx>
- To: pisa-src@xxxxxxxxxxxxx
- Date: Mon, 17 May 2010 12:39:13 +0200
Diego Biurrun <diego@xxxxxxxxxx> wrote:
> > +if test "$(uname -s)" = "FreeBSD"; then
> > + AC_SUBST(AM_CFLAGS, "$AM_CFLAGS -fno-strict-aliasing")
> > +fi
>
> What's the effect of this flag? I notice that HIPL has it as well,
> why not add it to the global CFLAGS?
Strict aliasing [1] enables further optimizations (think reordering) from the
compiler and is enabled by default starting from -O2. So the flag above is not
should not be used for global CFALGS.
[1] accessing a memory location via different names/pointers
--
Dipl.-Ing. Mircea Gherzan
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