Experimental Physics and
Industrial Control System

Andrew Johnson <[email protected]> · Thu, 25 Oct 2007 14:20:47 -0500

Janet Anderson wrote:

Yesterday I committed changes to the EPICS base R3.14 branch and the

main trunk to allow the GNU make "-j jobs" option to work when building

EPICS base. I also made a change in the makeBaseApp.pl templates to

allow the -j option when building new ioc applications . There is a note

about the -j change in the R3.14 branch release notes.

Note that Janet's parallel build rules that support the -j option

require the use of $(eval ...) which was introduced in GNU Make version

3.81. Serial compilation still works on older versions of Make as

before, but if you give a -j option the build will fail since many of

the dependencies won't have been set.

On our 8-core Linux box the performance gain is obvious; building Base

for Linux and one RTEMS target came down from 6 minutes to 2 minutes in

my test.

- Andrew
--
When a distinguished but elderly scientist states that something is
possible, he is almost certainly right.  When he states that something
is impossible, he is very probably wrong.  -- Arthur C. Clarke

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System