From kdevelop-bugs  Fri Nov 24 11:21:30 2006
From: Paul Fee <pfee () talk21 ! com>
Date: Fri, 24 Nov 2006 11:21:30 +0000
To: kdevelop-bugs
Subject: [Bug 137815] New: Parallel make (-j) dialogue limits abilities of GNU
Message-Id: <20061124122129.137815.pfee () talk21 ! com>
X-MARC-Message: https://marc.info/?l=kdevelop-bugs&m=118306959011070

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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