So far it's been running for about 4 hours. One thing to note is that I did not have the prerequisites and had to download them though contrib/download_prerequisites. Not sure if it adds to the compile time or not.

Machine specs listed below:

4 CPUs Intel(R) Xeon(R) CPU E5-2650 0 @ 2.00GHz

uname -a
Linux <name> 3.10.0-693.17.1.el7.x86_64 #1 SMP Thu Jan 25 13:49:55 PST 2018 x86_64 x86_64 x86_64 GNU/Linux

free -m
total        used        free      shared  buff/cache   available
Mem:          11854         676        1040           8       10137       
Swap:          5119           0        5119
  • It depends on your CPU, disk, configured languages, configured targets, whether you’re building with LTO, whether you’re running the tests... Feb 4, 2018 at 15:38
  • Updated the question with the CPU info and some additional information about the prerequisites.
    – Ya.
    Feb 4, 2018 at 16:19
  • Here are the exact steps I did 1) contrib/download_prerequisites 2) configure 3) make
    – Ya.
    Feb 4, 2018 at 16:20
  • On my SPARC T3 with gmake -j it took a few hours. On my Powerbook G4 it took a couple days. Having to compile additional things (GMP, ISL, etc) will certainly add to the compile time, but how much is uncertain. If you think GCC is slow to build, you should try GHC
    – Fox
    Feb 4, 2018 at 21:20
  • On my Acer E15 (Intel Core i3, 4 GB RAM) it took about 2.5 hours to build gcc (using make -j4) Feb 5, 2018 at 4:10

1 Answer 1


After about 4.5 hours it finished.

P.S. Not sure why this question deserved a negative rating. Hopefully it will still help some folks, should they find their compile time take excessively long.

  • 5
    Thanks for documenting this. It's very useful to have a reference!
    – alanning
    May 17, 2018 at 23:48
  • 1
    You can accept your own answer as the solution to your question to pass the message that your query was answered :) Nov 17, 2018 at 16:30
  • 1
    Mine takes 4 hours and 20 minutes, single thread (with 16 concurrent compiling tasks) Ryzen 7 1800X.
    – Shi B.
    Nov 20, 2019 at 9:03
  • Hi, do you remember how long it took to download the prerequisites? I ran ./contrib/download_prerequisites but there is no output and neither is it exiting. It just seems to be stuck. How do I know if things are even getting downloaded? I'm working behind a proxy so I'm not sure.
    – momo
    Jun 3, 2020 at 4:48
  • Helpful to see this while waiting for libgcc7 to compile on an old PowerPC Mac mini, which took about 13 hours! Aug 11, 2021 at 19:06

Not the answer you're looking for? Browse other questions tagged .