On the following code:
#ifndef NOINLINES
#define EINLINE __inline__
#else
#define EINLINE
#endif
EINLINE int a(void *value)
{
return *(char *)value;
}
int b(const char *val)
{
return a((char *)val);
}
int c(void)
{
return b("whatever");
}
... compiling it with these flags: -W -Wall -Winline -Wshadow -Werror -O
... gives this warning (treated as an error as requested):
pqp.c: In function b:
pqp.c:16: warning: passing argument 1 of a discards qualifiers from pointer
target type
if you pass -DNOINLINES on the command line, i.e. take away the inline
attribute, this goes away, except if I compile with -O3 (which tries to inline
it anyway). Please note the explicit cast to (char *) at a; without that cast
gcc should (and it does) warn both with and without attribute inline, but I
couldn't find a way to make the explicit cast respected when gcc is inlining
functions.
I couldn't reproduce this on gcc 4.1.x, i.e. it behaves ok.
--
Summary: inline attribute seems to mess with const qualifier.
Product: gcc
Version: 4.2.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: alexandre dot nunes at gmail dot com
GCC build triplet: i486-linux-gnu
GCC host triplet: i486-linux-gnu
GCC target triplet: i486-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34076
