http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59717
Bug ID: 59717
Summary: better warning when using functions when including
appropriate header files
Product: gcc
Version: 4.8.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: metherid at gmail dot com
Clang produces a better warning suggesting the appropriate header file compared
to GCC. Test program included
$gcc testwarning.c
testwarning.c: In function ‘main’:
testwarning.c:4:2: warning: incompatible implicit declaration of built-in
function ‘strcpy’ [enabled by default]
strcpy(teststr, "foo");
^
rahul@mether ~/work> clang test
testfor testfor.c testwarning.c
rahul@mether ~/work> clang testwarning.c
testwarning.c:4:2: warning: implicitly declaring library function 'strcpy' with
type 'char *(char *, const char *)'
strcpy(teststr, "foo");
^
testwarning.c:4:2: note: please include the header <string.h> or explicitly
provide a declaration for 'strcpy'
---
cat testwarning.c
int main (void) {
char *teststr;
strcpy(teststr, "foo");
---
