https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100331
Michael Benfield changed:
What|Removed |Added
CC||mbenfield at google dot com
--- Comment #2 from Michael Benfield ---
Given code with unused variables/parameters of some struct type in C that warns
for `-Wunused-variable`, the identical code warns in C++. But the same is not
true of `-Wunused-but-set-variable`: code that warns in C will not warn in C++.
This seems inconsistent to me; I suspect the code should warn in both
languages.
Similar comments apply to `-Wunused-parameter` and
`-Wunused-but-set-parameter`.
Given this code in both gcc-test.c and gcc-test.cpp:
struct S {
int x;
};
void f_unused_but_set(struct S p1) {
struct S s;
p1 = s;
struct S v1;
v1 = s;
}
void f_unused(struct S p2) {
struct S v2;
}
and compiling with `gcc -fsyntax-only -Wunused -Wextra gcc-test.c`, for
gcc-test.c, we get warnings for all of p1, v1, p2, v2, while for gcc-test.cpp
we get warnings only for p2 and v2.
