https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66088
Bug ID: 66088
Summary: -Wunused-but-set-variable does not regard static
variable access in local scope
Product: gcc
Version: 4.9.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: vshebordaev at mail dot ru
Target Milestone: ---
As of gcc 4.9.2, I get faulty -Wunused-but-set-variable warning (and broken
build with -Wall) in this case
1 struct test {
2 int t;
3 };
4
5 int main(int argc, const char *argv[])
6 {
7 static struct test t = { 0 };
8 struct test v = { 1 };
9
10 t = v;
11
12 return 0;
13 }
The warning disappears when t is referenced by its address, i.e. when line 10
changed to
10 *(&t) = v;
which is considered as a usage but looks ridiculously.
