http://lists.pld-linux.org/mailman/pipermail/pld-devel-en/2016-May/024910.html

patch from jbj answer:
http://lists.pld-linux.org/mailman/pipermail/pld-devel-en/2016-May/024913.html

On May 31, 2016, at 2:52 AM, Elan Ruusamäe wrote:

> On 31.05.2016 09:45, Elan Ruusamäe wrote:
>> [root@57c8cccdc671 bin]# poldek -u procps 
> oh, and it's 100% reproducible:
>

Yes. And it has been discussed many times over the last 15y,
several times on this list.

Short answer:
	Disable the mechanism with attached patch to lib/psm.c
		- OR --
	Don't use
		%scriptlet -p /sbin/ldconfig
	in packages that are known to invoke an executable that depends on
	a new library.

Longer answer:
	Libraries often have scriptlets like this:
		%post -p /sbin/ldconfig
		%postun -p /sbin/ldconfig
	(or the equivalent within a scriptlet body).

	On upgrade, with install before erase, this results in 2 executions of /sbin/ldconfig.

	One of those invocations is redundant when a library is being replaced, the
	install %post is sufficient to make the library avaialble for loading.

	The redundant invocation of /sbin/ldconfig  was deemed a performance flaw @redhat,
	where I was asked to implement the current optimization.

	So the RPM optimization detects when /sbin/ldconfig has just been run, and skips the next
		%scriptlet -p /sbin/ldconfig
	(when written exactly like that) if /sbin/ldconfig has been executed.

	Issues are only seen when a scriptlet contains an executable that needs
	a changed API: this is usually a very rare occurrence

	There are other flaws with the optimization when dependency loops break the sorted order
	(and/or --noorder is used). , and the fix of running /sbin/ldconfig manually is rather simple
	(even if the problem is obscure).

	There is another flaw (as in your report), when the very last package
	has a pending skipped /sbin/ldconfig invocation.

	The fix of running /sbin/ldconfig manually is rather simple
	(even if the problem is obscure).

hth

73 de Jeff
===================================================================
RCS file: /v/rpm/cvs/rpm/lib/psm.c,v
retrieving revision 2.399.2.20
diff -p -u -w -r2.399.2.20 psm.c
--- ./lib/psm.c	11 May 2015 21:10:16 -0000	2.399.2.20
+++ ./lib/psm.c	31 May 2016 15:19:20 -0000
@@ -800,7 +800,7 @@ static rpmRC runEmbeddedScript(rpmpsm ps
 static int ldconfig_done = 0;
 
 /*@unchecked@*/ /*@observer@*/ /*@null@*/
-static const char * ldconfig_path = "/sbin/ldconfig";
+static const char * ldconfig_path = NULL;
 
 /**
  * Run scriptlet with args.