Bug 52478 – gcc miscompiling sha1 digest in rpmio/digest.c

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Bug 52478 - gcc miscompiling sha1 digest in rpmio/digest.c

Summary:	gcc miscompiling sha1 digest in rpmio/digest.c

Status:	CLOSED WONTFIX

Aliases:	None

Product:	Red Hat Linux
Classification:	Retired
Component:	gcc (Show other bugs)
Sub Component:
Version:	7.1
Hardware:	alpha Linux

Priority	medium Severity medium
Target Milestone:	---
Target Release:	---
Assigned To:	Jakub Jelinek
QA Contact:	David Lawrence
Docs Contact:

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Depends On:
Blocks:
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Reported:	2001-08-23 23:52 EDT by Jeff Johnson
Modified:	2007-04-18 12:36 EDT (History)
CC List:	0 users

See Also:
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2004-10-04 16:56:04 EDT
Type:	---
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RHEL 7.3 requirements from Atomic Host:
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Description Jeff Johnson 2001-08-23 23:52:52 EDT

Description of Problem:
gcc-2.96-93 in 7.1 (and gcc-2.96-97 in 7.2) is miscompiling
rpmio/digest.c sha1 digest. Compiling with -O0 works, as
does adding debugging messages.

Version-Release number of selected component (if applicable):

How Reproducible:


Steps to Reproduce:
1.  rpm --rebuild rpm-4.0.3-0.95.src.rpm
2. cd rpmio
3. make tdigest && ../tdigest --fipsa

Actual Results:
2c80fcd2cf957725c03d03c123e666be6b97d925     abc
a9993e364706816aba3e25717850c26c9cd0d89d     FIPS PUB 180-1 Appendix A

Expected Results:
a9993e364706816aba3e25717850c26c9cd0d89d     abc
a9993e364706816aba3e25717850c26c9cd0d89d     FIPS PUB 180-1 Appendix A


Additional Information:
	
There's debugging code in rpmio/digest.c to reproduce the intermediate
FIPS results if necessary (but defining SHA_DEBUG causes problem
to disappear).

Comment 1 Jeff Johnson 2001-08-23 23:55:18 EDT

Note that rpmio/digest.o is being compiled with -O0 in
the rpm-4.0.3-0.95 package.

Comment 2 Vladimir Makarov 2004-10-04 16:56:04 EDT

  I am closing this case.  gcc-2.96 is too old.  Its release cycle was
finished long ago.  Also we don't support alpha anymore.

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