MacOS multithreaded version cbc 2.10.13

[Rolf527]

Dear support,

On macOS (version 26.3.1), I tried to build COIN-OR Cbc version 2.10.13 using the coinbrew script.

The script is almost identical to the one used for building the master branch. However, the result is different: the master branch produces a multithreaded version, while version 2.10.13 results in a single-threaded build.

Could you advise why this happens and whether additional options are needed to enable multithreading for version 2.10.13?

Best regards,
Rolf

Script for Cbc 2.10.13

wget https://raw.githubusercontent.com/coin-or/coinbrew/master/coinbrew
chmod u+x coinbrew
./coinbrew fetch Cbc@2.10.13
./coinbrew build Cbc

Script for Cbc master

wget https://raw.githubusercontent.com/coin-or/coinbrew/master/coinbrew
chmod u+x coinbrew
./coinbrew fetch Cbc@master
./coinbrew build Cbc

[svigerske]

With the current development version (master), enabling multithreading when possible has become default behavior. For Cbc 2.10, add --enable-cbc-parallel to your coinbrew call.

Changelog is in the readme: https://github.com/coin-or/Cbc?tab=readme-ov-file#changelog

[Rolf527]

Thank you. It works.
One warning was issued during the build, but it appears to have no consequences:

configure: WARNING: --enable-cbc-parallel selected, but -lrt unavailable; using gettimeofday instead of clock_gettime