This is the mail archive of the
gcc@gcc.gnu.org
mailing list for the GCC project.
Re: Building GCC & CFLAGS settings
On Wed, 2010年05月05日 at 10:42 -0700, H.J. Lu wrote:
> On Wed, May 5, 2010 at 10:18 AM, Steve Ellcey <sje@cup.hp.com> wrote:
> >
> > I was wondering if anyone has built GCC using a CFLAGS (and CXXFLAGS) setting
> > that causes GCC to generate code that is not compatibile with the default
> > GCC output. Basically, I am building GCC on ia64-hp-hpux11.31 where I set
> > CFLAGS and CXXFLAGS to "-mlp64" to generate 64 bit code instead of the
> > default 32 bit code. During the build libiberty is built in 64 bit mode but
> > then the object files that go into genmodes (genmodes.o, errors.o, etc) are
> > compiled without using CFLAGS and the link of genmodes fails because
> > genmodes.o and errors.o are in 32 bit mode and libiberty is in 64 bit mode.
> >
>
> I am using
>
> # CC="gcc -m32" CXX="g++ -m32" ...../configure ....
>
> to bootstrap 32bit gcc on 64bit Linux.
I am curious, if you do this does the resulting compiler generate 32 bit
code by default? And I assume that if you don't specify CC and CXX
with the -m32 flags then the compiler generates 64 bit code by default,
right?
Steve Ellcey
sje@cup.hp.com