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* [Bug c/18935] New: Error on reference of 'extern' variable in block scope.
@ 2004-12-11 0:03 sorie at sorie dot net
2004-12-11 1:21 ` [Bug c/18935] [3.4 Regression] " pinskia at gcc dot gnu dot org
0 siblings, 1 reply; 2+ messages in thread
From: sorie at sorie dot net @ 2004-12-11 0:03 UTC (permalink / raw)
To: gcc-bugs
This problem occurs in both mode c89 and c99.
I will try to describe it with a simple example.
----- code.c ------------------------------
#include <stdio.h>
int main(void)
{
extern int a;
printf("a: %d\n", a);
int a = 20; /* internal compiler error */
return 0;
}
-----------------------------------------
If you compile this code, you'll get follwing error message.
$ gcc -Wall -std=c89 code.c
code.c: In function `main':
code.c:7: internal compiler error: in make_decl_rtl, at varasm.c:752
Inside a block scope, the codes are executed sequently.
So I think, when there is a variable declaration with 'extern', that the
compiler should either let occur an error of double variable-declaration or show
warning only and just give the local variable priority.
Thank you for reading.
--
Summary: Error on reference of 'extern' variable in block scope.
Product: gcc
Version: 3.4.3
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: sorie at sorie dot net
CC: gcc-bugs at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18935
^ permalink raw reply [flat|nested] 2+ messages in thread
* [Bug c/18935] [3.4 Regression] Error on reference of 'extern' variable in block scope.
2004-12-11 0:03 [Bug c/18935] New: " sorie at sorie dot net
@ 2004-12-11 1:21 ` pinskia at gcc dot gnu dot org
0 siblings, 0 replies; 2+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-12-11 1:21 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-12-11 01:21 -------
Fixed at least on the mainline: Search converges between 2004-07-31-trunk (#500) and 2004-08-01-
trunk (#501).
But it is a regression from 2.95.3:
: Search converges between 2001-03-11-trunk (#10) and 2001-03-18-trunk (#11).
--
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Ever Confirmed| |1
Keywords| |ice-on-invalid-code
Known to work| |2.95.3 4.0.0
Last reconfirmed|0000-00-00 00:00:00 |2004-12-11 01:21:44
date| |
Summary|Error on reference of |[3.4 Regression] Error on
|'extern' variable in block |reference of 'extern'
|scope. |variable in block scope.
Target Milestone|--- |3.4.4
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18935
^ permalink raw reply [flat|nested] 2+ messages in thread
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2005-04-30 0:05 ` [Bug c/18935] [3.4 Regression] Error on reference of 'extern' variable in block scope jsm28 at gcc dot gnu dot org
2004-12-11 0:03 [Bug c/18935] New: " sorie at sorie dot net
2004-12-11 1:21 ` [Bug c/18935] [3.4 Regression] " pinskia at gcc dot gnu dot org
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