Bug 18983

Summary:	Gcc crashes when compiling glibc
Product:	[Retired] Red Hat Linux	Reporter:	jfm2
Component:	gcc	Assignee:	Jakub Jelinek <jakub>
Status:	CLOSED NOTABUG	QA Contact:	David Lawrence <dkl>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	7.0
Target Milestone:	---
Target Release:	---
Hardware:	i386
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2000-10-13 08:20:52 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description jfm2 2000-10-12 18:00:46 UTC

When rebuilding the  glibc RPM with --target=i686 gcc 2.96 core dumps 
(illegal instruction) during the compilation of the sun_rpc directory.  It
is very reproducible and it happens both with the original and the patched
glibc you issued a few days ago.

The distribution is vanilla RedHat 7 where everything has been installed,
glibc was the original one.  The RPM builds successfully when targetting
386

My box has a K6/2 processor

Comment 1 Jakub Jelinek 2000-10-12 19:18:56 UTC

Details please, which file does it crash on, which options passed to it,
preprocessed file (best run rpm -ba glibc.spec 2>&1 | tee glibc.log,
then cut'n'paste the command which caused the gcc to crash, add
-save-temps -v to it and send me its output and the .i file).
I cannot reproduce this myself and I'm building glibc with these
flags (both i386 and i686 targets) almost daily for a couple of
months.

Comment 2 Jakub Jelinek 2000-10-13 08:20:46 UTC

Actually, why are you building i686 glibc on K6/2? K6/2 AFAIK does not have
conditional move instructions, so if the SIGILL comes when glibc tries to
run rpcgen or similar program, it can crash on K6/2 if there are any
cmoves generated (which gcc can legally use if -march=i686).
During glibc bootstrap after the main library is compiled glibc executes
binaries using the newly built dynamic linker and library.

Comment 3 jfm2 2000-10-13 21:09:25 UTC

It turned to be a mistake.  Somewhere in the the building of glibc an auxilary
program is byuilt and executed.  Since that executable was generated with the
PPro instruction set and I was on a K6/2 it core
dumped and I thought it was the compiler who had core dumped.