Is there a way to avoid recompile all opencv?

Asked May 30 '17 at 13:27

Active May 31 '17 at 00:42

Viewed 149 times

I'm trying to make opencv (3.1.0) as I want, changing some parameters in the cmake command line to change the modules that I want to use.

The problem is that everytime that I touch cmake all the source is rebuilt, with a high time consume.

Is there a way to change, for example with_gtk, and don't waste hour+?

(platform ubuntu-linux 16.10)

edited May 30 '17 at 13:53

asked May 30 '17 at 13:27

Mquinteiro

2

your mileage may vary, but have a look at https://stackoverflow.com/questions/1815688/how-to-use-ccache-with-cmake – Lanting May 30 '17 at 13:56
libopencv 3.1 is packaged on Debian/Sid. Are you sure you don't have it on your Ubuntu? Did you try `apt-get install libopencv-dev libopencv-core3.1` ? – Basile Starynkevitch May 30 '17 at 13:58
@BasileStarynkevitch sadly there is no 3.x on ubuntu. – Mquinteiro May 30 '17 at 14:00
@Lanting sound complex, but I will check. – Mquinteiro May 30 '17 at 14:01
1

I doubt that CMake will ever deduce whether a changed flag requires recompiling targets or not. A tip to speed up the build process: Try Ninja instead of Make as the build tool. – usr1234567 May 30 '17 at 14:20
2

Try `make -j 8` or similar to build in parallel. – Mark Setchell May 30 '17 at 14:52
@MarkSetchell actually I did with j=10 (I have 12cores) and it takes arround 50 minutes, I thinking in remove cuda support until I get an stable compilation. – Mquinteiro May 30 '17 at 15:48

0 Answers0