[rescue] Why gcc exists - Re: Help with SunFire V240 Server
john at jfloren.net
Thu Apr 11 12:25:02 CDT 2013
gcc really likes to be helpful and optimize for you. We've found that
sometimes, it'll optimize out entire loops and function calls, whether we
wanted them executed or not!
On Thu, Apr 11, 2013 at 10:10 AM, Toby Thain <toby at telegraphics.com.au>wrote:
> On 11/04/13 12:58 PM, Andrew Gaylard wrote:
>> On 04/11/13 17:50, microcode at zoho.com wrote:
>>> On Thu, Apr 11, 2013 at 05:25:06PM +0200, Andrew Gaylard wrote:
>>> I have downloaded the Sun Studio compiler, but haven't tried it;
>>>> gcc has always "just worked" for me.
>>> Not surprising given 99.9% of apps seem to be written for Linux.
>>> Still, most
>>> stuff builds easily on Solaris with Studio after you set CFLAGS and
>>> occasionally LDFLAGS. One notable exception is git.
>>> Does someone have any info (URLs, etc) showing if it really is
>>>> faster, and
>>>> by how much?
>>> It seems pretty obvious to me Solaris Studio would be faster on SPARC,
>>> like Intel's compilers are faster on Intel chips. Why would anybody think
>>> gcc is faster or better at anything?
>> The reason I think it's faster is that, on SunOS-4.1.1, gcc-2.2's code
>> (I think it was 2.2) was 30-50% faster than /usr/bin/cc.
>> Oh wait, that was 23 years ago.
> Being "better than vendor's" was not only the raison d'jtre for gcc, it
> was also why it eventually supplanted nearly all of them :)
> (Also, 23 years ago, x86 wasn't a mainstream server platform.)
> But tell the kids these days... they won't believe yer...
>> You're probably right. Old habits die hard.... :)
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