On Sun, 24 May 2009, Jan Engelhardt wrote:
Bruno wrote:
The -m64 flag is the default on bi-arch Linux systems.
-m64 is the default on where it has been configured so. Just because
your shiny x86_64 install does that, does not mean it is universal.
Oftentimes RISCs, and sparc64 is usually one of these, defaults to
defaulting to 32, because 64 is slower there. Of course you can
compile a gcc that defaults to 64.
I have not noticed that PowerPC or SPARC 64 bit code is slower or
faster than 32 bit code. I have noticed that some older or poorly
maintained applications (e.g. Perl) sometimes don't work as 64-bit
code.
Compiler defaults are simply a matter of policy which is up to the GCC
maintainers, the individual Linux distribution, or even the person who
installs GCC, to determine.
Bob
--
Bob Friesenhahn
bfrie...@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer, http://www.GraphicsMagick.org/
