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[Bug c/81779] New: bool define from stdbool.h suppresses -Wdeclaration-after-statement
- From: "sirl at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Wed, 09 Aug 2017 09:44:52 +0000
- Subject: [Bug c/81779] New: bool define from stdbool.h suppresses -Wdeclaration-after-statement
- Auto-submitted: auto-generated
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81779
Bug ID: 81779
Summary: bool define from stdbool.h suppresses
-Wdeclaration-after-statement
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: sirl at gcc dot gnu.org
Target Milestone: ---
This testcase warns only once with -Wdeclaration-after-statement since at least
gcc-4.8:
#include <stdbool.h>
bool f2(char *pRedo)
{
if (!pRedo)
return false;
bool ret = true;
return ret;
}
int f3(char *pRedo)
{
if (!pRedo)
return 0;
int ret = 1;
return ret;
}
# gcc-7 -c -Wdeclaration-after-statement Wdeclaration-after-statement.c
Wdeclaration-after-statement.c: In function 'f3':
Wdeclaration-after-statement.c:18:2: warning: ISO C90 forbids mixed
declarations and code [-Wdeclaration-after-statement]
int ret = 1;
^~~
gcc-4.4 warned 2 for both occurences:
# gcc-4.4 -c -Wdeclaration-after-statement Wdeclaration-after-statement.c
Wdeclaration-after-statement.c: In function 'f2':
Wdeclaration-after-statement.c:10: warning: ISO C90 forbids mixed declarations
and code
Wdeclaration-after-statement.c: In function 'f3':
Wdeclaration-after-statement.c:17: warning: ISO C90 forbids mixed declarations
and code
Adding -Wsystem-headers shows 2 warnings also with newer GCC, but I don't think
that this option should influence -Wdeclaration-after-statement.