Bug 194455 – SCCS Ident strings stripped by over-zealous optimiser

Bug 194455 - SCCS Ident strings stripped by over-zealous optimiser

Summary:	SCCS Ident strings stripped by over-zealous optimiser

Status:	CLOSED NOTABUG

Aliases:	None

Product:	Fedora
Classification:	Fedora
Component:	gcc4 (Show other bugs)
Sub Component:
Version:	4
Hardware:	i386 Linux

Priority	medium Severity urgent
Target Milestone:	---
Target Release:	---
Assigned To:	Jakub Jelinek
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Reported:	2006-06-08 06:36 EDT by Jonathan Allen
Modified:	2007-11-30 17:11 EST (History)
CC List:	0 users

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Doc Type:	Bug Fix
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Last Closed:	2006-06-08 07:01:26 EDT
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Description Jonathan Allen 2006-06-08 06:36:49 EDT

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.
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Actual results:


Expected results:


Additional info:

Comment 1 Jakub Jelinek 2006-06-08 07:01:26 EDT

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).

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