Bug 194455

Summary:	SCCS Ident strings stripped by over-zealous optimiser
Product:	[Fedora] Fedora	Reporter:	Jonathan Allen <jonathan>
Component:	gcc4	Assignee:	Jakub Jelinek <jakub>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	urgent	Docs Contact:
Priority:	medium
Version:	4
Target Milestone:	---
Target Release:	---
Hardware:	i386
OS:	Linux
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Fixed In Version:		Doc Type:	Bug Fix
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Clone Of:		Environment:
Last Closed:	2006-06-08 11:01:26 UTC	Type:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
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Embargoed:

Description Jonathan Allen 2006-06-08 10:36:49 UTC

Description of problem:

The SCCS-style ident strings have all been optimised out by the C compiler.
This makes it impossible to see what components are included in a binary
by doing the standard:  strings <bin-file> | grep "@(#)" | sort | more

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

gcc 4.0.2 20051125

How reproducible:

100% - just include the line:

   static char ident[] = "@(#) filename.c";

in a C source file and don't reference the string


Steps to Reproduce:
1.
2.
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Actual results:


Expected results:


Additional info:

Comment 1 Jakub Jelinek 2006-06-08 11:01:26 UTC

That's intentional, if you want the string kept in, either you need to compile
without optimizatins, or tell GCC you want to keep the variable eventhough
it is not used (add __attribute__((__used__)) to it).