Re: speed up large library linking

[Peter O'Gorman]

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Ralf Wildenhues wrote:
| First off: My laptop was broke last week, then some of our department's
| hardware was destroyed, so: no mail reading, thus no patch checks, no
| 1.5.18 release.

Do you need someone else to make the release? Sorry to hear about your
hardware troubles.

| Discussion:
| -----------
| Immediate consequence for the libjava folks: Use of -objectlist is to be
| preferred, with their (ancient!) libtool as well as with HEAD after the
| changes below.  I have another optimization idea for -objectlist which
| will kill some of the 2.8s left, but it needs more work, and might not
| be immediately necessary.

Use of -objectlist with libjava is required, I haven't built libjava in a
little while, I thought they used it, if not they are undoubtedly exceeding
the kernel limit on command line lenght on some systems.

| Changes:
| --------
|
| My patches break one assumption held in libtool so far:  that --dry-run
| will cause no file changes.

I understand your reasons for breaking this, but it freaks me out a little
bit. Have you reported the quadratic behavior to the bash maintainers? We
need to file bugs with them about this too. Note that some of your FIXMEs in
the patches below are in my opinion not needed, if libtool got the argument
list and -objectlist was not used then the kernel limit was not exceeded and
$ECHO is fine.

|
| OK to apply them all to HEAD?

I am loathe to say 'No', but I will ask that you not commit these to HEAD
without explicit approval.

speedup-features2.diff OK
speedup-fixme2.diff  OK (even thought these comments may not always be
warranted a reminder about command line length can't hurt)

The others scare me, I don't like the tempfiles. If no other maintainer
approves in a few days I will look more closely.

Peter
- --
Peter O'Gorman - http://www.pogma.com
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