Time taken by GCC 4.9.1 to compile

Time taken by GCC 4.9.1 to compile

[Syed Ahsan Ali Bokhari]

I wonder how much time it takes to compile gcc-4.9.1. After "make" 2
hours have been passed and still build underway.

Ahsan

Re: Time taken by GCC 4.9.1 to compile

[Syed Ahsan Ali Bokhari]

Thanks Raghunath

I have not used any option with configure. I guess I should also try
parallel build.


On Wed, Aug 6, 2014 at 1:14 PM, Raghunath Lolur
<raghunathlolur.subscriptions@gmail.com> wrote:
> It depends on what options you used in configuring GCC.
>
> To speed up the build process, you can make use of parallel execution of
> make utility with the following command:
>
> make -j <N> , where  N is the number of parallel jobs, determined by the
> number of CPU cores available in your system.
>
> To determine the number of CPU cores in your system, read
> http://www.cyberciti.biz/faq/linux-get-number-of-cpus-core-command/
>
> Also, read https://gcc.gnu.org/install/ - for more info on building GCC from
> source.
>
> Regards,
> Raghunath Lolur.
>
>
> On Wed, Aug 6, 2014 at 11:19 AM, Syed Ahsan Ali Bokhari
> <ahsan.pmd@gmail.com> wrote:
>>
>> I wonder how much time it takes to compile gcc-4.9.1. After "make" 2
>> hours have been passed and still build underway.
>>
>> Ahsan
>
>



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Re: Time taken by GCC 4.9.1 to compile

[Jeff Law]

On 08/05/14 23:49, Syed Ahsan Ali Bokhari wrote:
> I wonder how much time it takes to compile gcc-4.9.1. After "make" 2
> hours have been passed and still build underway.
It's highly dependent on your processor's speed and how many processors 
you have.

I've got one system here where it takes about a week (no testsuite).  On 
the systems where I typically do builds it's a couple hours (testsuite 
included).   I'd bet on David M.'s box it's probably less than 30 minutes ;)

Certainly if you have a multi-processor using the "-j #cpus" option to 
make will speed things up considerably.

jeff

Re: Time taken by GCC 4.9.1 to compile

[Tim Prince]

On 8/6/2014 11:31 AM, Jeff Law wrote:
> On 08/05/14 23:49, Syed Ahsan Ali Bokhari wrote:
>> I wonder how much time it takes to compile gcc-4.9.1. After "make" 2
>> hours have been passed and still build underway.
> It's highly dependent on your processor's speed and how many 
> processors you have.
>
> I've got one system here where it takes about a week (no testsuite).  
> On the systems where I typically do builds it's a couple hours 
> (testsuite included).   I'd bet on David M.'s box it's probably less 
> than 30 minutes ;)
>
> Certainly if you have a multi-processor using the "-j #cpus" option to 
> make will speed things up considerably.
>
> jeff
Nearly 4 hours to build C Fortran C++ on my Win8.1 4-core laptop. (with 
"prerequisites" pre-installed).  That's the worse case I encounter 
routinely.
8 hours to run testsuite, with each language started in an independent 
session.  There are still occasional spurious time-outs and early 
aborts.  Attempting to run testsuite on faster Windows boxes is 
counter-productive due to Windows holding files busy.
An obsolete linux box here will build and test in well under 2 hours.

Time taken by GCC 4.9.1 to compile

[Raghu L]

On Wed, Aug 6, 2014 at 11:19 AM, Syed Ahsan Ali Bokhari <ahsan.pmd@gmail.com> wrote:

>   I wonder how much time it takes to compile gcc-4.9.1. After "make" 2
>    hours have been passed and still build underway.
>
>    Ahsan

It depends on what options you used in configuring GCC.

To speed up the build process, you can make use of parallel execution of make utility with the following command:

make -j <N> , where  N is the number of parallel jobs, determined by the number of CPU cores available in your system.

To determine the number of CPU cores in your system, read http://www.cyberciti.biz/faq/linux-get-number-of-cpus-core-command/

Also, read https://gcc.gnu.org/install/ - for more info on building GCC from source.

Regards,
Raghunath Lolur.