https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61861
Bug ID: 61861
Summary: Incorrect column number for -Wdiscarded-qualifiers
Product: gcc
Version: 4.10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: chengniansun at gmail dot com
It seems that GCC outputs incorrect column number for "__FILE__", but not user
defined macro "T".
$: cat t.c
extern int * f (int*a, char * loc);
#define T "t.c"
void g(int *a) {
f(a, T); /*column number here is correct*/
f(a, __FILE__); /*column number here is INCORRECT*/
}
$:
$: gcc-trunk -Wwrite-strings -c t.c
t.c: In function ‘g’:
t.c:3:11: warning: passing argument 2 of ‘f’ discards ‘const’ qualifier from
pointer target type [-Wdiscarded-qualifiers]
#define T "t.c"
^
t.c:6:8: note: in expansion of macro ‘T’
f(a, T);
^
t.c:1:14: note: expected ‘char *’ but argument is of type ‘const char *’
extern int * f (int*a, char * loc);
^
t.c:7:1: warning: passing argument 2 of ‘f’ discards ‘const’ qualifier from
pointer target type [-Wdiscarded-qualifiers]
f(a, __FILE__);
^
t.c:1:14: note: expected ‘char *’ but argument is of type ‘const char *’
extern int * f (int*a, char * loc);
^
$:
$: clang-trunk -Wwrite-strings -c t.c
t.c:6:8: warning: passing 'const char [4]' to parameter of type 'char *'
discards qualifiers
[-Wincompatible-pointer-types-discards-qualifiers]
f(a, T);
^
t.c:3:11: note: expanded from macro 'T'
#define T "t.c"
^~~~~
t.c:1:31: note: passing argument to parameter 'loc' here
extern int * f (int*a, char * loc);
^
t.c:7:8: warning: passing 'const char [4]' to parameter of type 'char *'
discards qualifiers
[-Wincompatible-pointer-types-discards-qualifiers]
f(a, __FILE__);
^~~~~~~~
<scratch space>:2:1: note: expanded from here
"t.c"
^~~~~
t.c:1:31: note: passing argument to parameter 'loc' here
extern int * f (int*a, char * loc);
^
2 warnings generated.
$:
