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bug#23371: emacs: paxctl usage on NetBSD

From: Paul Eggert
Subject: bug#23371: emacs: paxctl usage on NetBSD
Date: Wed, 27 Apr 2016 12:38:53 -0700
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.0

On 04/27/2016 08:54 AM, Thomas Klausner wrote:
configure.ac says
that paxctl is used only when the operating system is GNU/Linux, unless one
manually configures by setting PAXCTL in the environment or using a
PAXCTL=/some/path argument to 'configure'.
That's true, but src/Makefile.in ignores that:
PAXCTL_if_present = $(or $(PAXCTL),: paxctl)

I guess I'm still not following. On non-GNU/Linux hosts, $(PAXCTL) should be empty because paxctl is not searched for, so PAXCTL_if_present should be ': paxctl', i.e., a no-op shell command. And yet you reported that your build used 'paxctl -zex' and 'paxctl -r'. Perhaps your build was actually using the no-ops ': paxctl -zex' and ': paxctl -r' and you didn't notice the colons? That is, perhaps you replaced ': paxctl -zex' (with a prefix colon) with 'paxctl +a' (without the colon)?

My version is attached (I added some more paxctl's for the symlinks
when the original version didn't work.) I hope I didn't break it.

Did it work with your version?

If so, does 'ln' and/or 'mv' remove the mark placed on an executable by 'paxctl +a'? and if that happens, how does 'make install' avoid removing the mark in the installed Emacs?

If not, then I'm afraid I'm lost.

Also, I noticed that you removed the indenting on some of the 'ifeq' lines in src/Makefile.in; why was that necessary?

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