Bug 2749

Summary:	gcc -c -O2 -ansi -pedantic -D_GNU_SOURCE foo.c fails
Product:	[Retired] Red Hat Linux	Reporter:	mdaum
Component:	glibc	Assignee:	Cristian Gafton <gafton>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	6.0
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:	1999-07-28 05:18:22 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 mdaum 1999-05-11 23:39:24 UTC

gcc -c -O2 -pedantic -D_GNU_SOURCE foo.c will fail in
/usr/include/bits/mathinline.h if math.h is included.
Compiler output follows:

/usr/include/bits/mathinline.h:117: warning: ANSI C forbids
specifying structure member to initialize
/usr/include/bits/mathinline.h:117: initializer element for
`__u.__f' is not computable at load time
/usr/include/bits/mathinline.h: In function `__signbit':
/usr/include/bits/mathinline.h:122: warning: ANSI C forbids
specifying structure member to initialize
/usr/include/bits/mathinline.h:122: initializer element for
`__u.__d' is not computable at load time
/usr/include/bits/mathinline.h: In function `__signbitl':
/usr/include/bits/mathinline.h:127: warning: ANSI C forbids
specifying structure member to initialize
/usr/include/bits/mathinline.h:127: initializer element for
`__u.__l' is not computable at load time

Comment 1 Jim Kingdon 1999-07-24 16:49:59 UTC

I was able to reproduce this.  I would suggest fixing mathinline.h
so it uses an assignment like "__u.__f = __x" rather than an
initializer.
Alternately, use __extension__.

Comment 2 Cristian Gafton 1999-07-28 05:18:59 UTC

glibc headers are not happy with the -pedantic or -traditional. POSIX
specs are making it nearly impossible.