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

[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

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 -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

Post by 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

[Raghu L]

  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.

[Jeff Law]

Post by 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.

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

[Tim Prince]

Post by Jeff Law

Post by 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.

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.