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List:       kdevelop-bugs
Subject:    [Bug 137815] New: Parallel make (-j) dialogue limits abilities of GNU
From:       Paul Fee <pfee () talk21 ! com>
Date:       2006-11-24 11:21:30
Message-ID: 20061124122129.137815.pfee () talk21 ! com
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http://bugs.kde.org/show_bug.cgi?id=137815         
           Summary: Parallel make (-j) dialogue limits abilities of GNU make
           Product: kdevelop
           Version: unspecified
          Platform: Ubuntu Packages
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: wishlist
          Priority: NOR
         Component: general
        AssignedTo: kdevelop-bugs kdevelop org
        ReportedBy: pfee talk21 com


Version:           3.3.5 (using KDE KDE 3.5.5)
Installed from:    Ubuntu Packages
OS:                Linux

The dialogue box, Project/Project Options/Build Options/Make allows the user to control \
invocation of "make".

The "Number of simultaneous jobs" box equates to the "-j" option for controlling parallel jobs \
with GNU make.

The number selected is appended to the -j flag.

This does not correctly model the functionality of the -j option.  If -j is used without a \
number, GNU make will invoke as many parallel jobs as it can identify within the Makefile.

The current dialogue item forces the user to select a number between 1 and 30.  The number 30 \
is too low, the Sun UltraSparc T1 processor can execute 32 threads in parallel.

The dialogue should have a check box for parallel builds.  If not checked, don't use -j.  This \
also addresses the issue that not all make programs understand "-j".  Currently the user must \
select a number, even selecting "1" results in "-j1" being passed to make.  KDevelop should not \
assume GNU make is being used.

When parallel builds is checked, the user would then have the option to select the number of \
jobs.  The number could be "unlimited" (i.e. -j without a following number), or an integer \
(e.g. "5" would equate to -j5).

Thanks,
Paul


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