https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92212
Bug ID: 92212
Summary: incompatible calls to K&R functions not diagnosed
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: msebor at gcc dot gnu.org
Target Milestone: ---
Unlike some other compilers GCC doesn't diagnose incompatible calls to K&R
style functions in the same translation unit.
$ cat b.c && gcc -O2 -S -Wall -Wextra -Wpedantic b.c
int f (i)
int i;
{
return i;
}
int g (void)
{
return f (""); // missing warning
}
Both Clang and ICC detect the problem and issue the equivalent of:
warning: incompatible pointer to integer conversion passing 'char [1]' to
parameter of type 'int' [-Wint-conversion]
return f ("");
^~
