Bug 155641 – Forward reference in extern array reference causes error.

Bug 155641 - Forward reference in extern array reference causes error.

Summary:	Forward reference in extern array reference causes error.

Status:	CLOSED NOTABUG

Aliases:	None

Product:	Fedora
Classification:	Fedora
Component:	gcc4 (Show other bugs)
Sub Component:
Version:	4
Hardware:	i686 Linux

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

URL:
Whiteboard:
Keywords:

Depends On:
Blocks:
	Show dependency tree / graph

Reported:	2005-04-22 01:08 EDT by Rusty Scott
Modified:	2007-11-30 17:11 EST (History)
CC List:	0 users

See Also:
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2005-04-24 07:24:22 EDT
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

Attachments	(Terms of Use)
A simple compile case to demonstrate the issue. (270 bytes, text/plain) 2005-04-22 01:08 EDT, Rusty Scott	no flags	Details
Add an attachment (proposed patch, testcase, etc.)

Groups: None (edit)

Description Rusty Scott 2005-04-22 01:08:36 EDT

Description of problem:
A valid forward reference to a structure in an external reference is errored by
gcc4.

Version-Release number of selected component (if applicable):
gcc version 4.0.0 20050405 (Red Hat 4.0.0-0.40)

How reproducible:
always

Steps to Reproduce:
1. get test_code.c (from attachment)
2. gcc test_code.c
3.
  
Actual results:
test_code.c:7: error: array type has incomplete element type

Expected results:
This hasn't ever been an error before, I'm not aware of any specification
changes to the way forward references work.

Additional info:

Comment 1 Rusty Scott 2005-04-22 01:08:36 EDT

Created attachment 113510 [details]
A simple compile case to demonstrate the issue.

Comment 2 Jakub Jelinek 2005-04-24 07:24:22 EDT

This is not a bug.  Your testcase is not valid ISO C.  See ISO C99, 6.7.5.2 Array
declarators: The element type shall not be an incomplete or function type.
Older GCC's issued a pedantic warning (resp. error with -pedantic-errors), in
GCC 4.0.x and later this error is unconditional.

Note You need to log in before you can comment on or make changes to this bug.