Bug 970864 – Testsuite failure: Extra PLT reference

Bug 970864 - Testsuite failure: Extra PLT reference

Summary:	Testsuite failure: Extra PLT reference

Status:	CLOSED RAWHIDE

Aliases:	None

Product:	Fedora
Classification:	Fedora
Component:	glibc (Show other bugs)
Sub Component:
Version:	rawhide
Hardware:	Unspecified Unspecified

Priority	unspecified Severity unspecified
Target Milestone:	---
Target Release:	---
Assigned To:	Carlos O'Donell
QA Contact:	Fedora Extras Quality Assurance
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Reported:	2013-06-05 02:39 EDT by Siddhesh Poyarekar
Modified:	2016-11-24 07:14 EST (History)
CC List:	8 users (show)

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Doc Type:	Bug Fix
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Last Closed:	2013-06-20 05:23:23 EDT
Type:	Bug
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Description Siddhesh Poyarekar 2013-06-05 02:39:29 EDT

Description of problem:
The current rawhide build (in progress, 2.17.90-1.fc20) has an extra PLT reference in libc.so:

=====/builddir/build/BUILD/glibc-2.17-757-g96df079/build-x86_64-redhat-linux/elf/check-localplt.out=====
Extra PLT reference: libc.so: memset

Version-Release number of selected component (if applicable):
glibc-2.17.90-1.fc20

How Reproducible:
Always

Steps to Reproduce:
See build log.

Comment 1 Siddhesh Poyarekar 2013-06-10 23:28:47 EDT

binutils is getting the symbol name wrong somehow, but the breakage is real.  The extra PLT is for __GI___gettimeofday, not memset.  the F17 version of binutils also got the name wrong as malloc, but since malloc is excluded from the extra PLT check, this failure went unnoticed.

There's no point in avoiding a PLT for __gettimeofday and for similar reasons, the hidden definition is also useless.  Any overhead added to avoid the PLT would be more expensive that the additional PLT.  I'm considering removing those bits and adding a direct call to __gettimeofday.

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