https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86440
Yohei Kojima <y.koj.eel at gmail dot com> changed:
What |Removed |Added
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CC| |y.koj.eel at gmail dot com
--- Comment #3 from Yohei Kojima <y.koj.eel at gmail dot com> ---
gcc 13.2.0 reports warnings as follows:
$ g++ -Wignored-qualifiers -c a.cc
a.cc:1:1: warning: type qualifiers ignored on function return type
[-Wignored-qualifiers]
1 | int const f() { return 0; }
| ^~~
a.cc:3:1: warning: type qualifiers ignored on function return type
[-Wignored-qualifiers]
3 | int * const g() { return 0; }
| ^~~
Also, with the following C source b.c, gcc reports errors at the wrong
confusing location.
$ cat b.c
void f(void *const (*)(void)) {
}
void g(void *const (*h)(void)) {
}
The reported error was like below. Error report on g() is fine,
but gcc points to the return type of outer function on f(), which was confusing
to me.
$ gcc -c -Wignored-qualifiers b.c
b.c:1:1: warning: type qualifiers ignored on function return type
[-Wignored-qualifiers]
1 | void f(void *const (*)(void)) {
| ^~~~
b.c:4:22: warning: type qualifiers ignored on function return type
[-Wignored-qualifiers]
4 | void g(void *const (*h)(void)) {
| ^
Tested environment is gcc 13.2.0 on Docker (The current latest release
available from https://hub.docker.com/_/gcc):
$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/local/libexec/gcc/x86_64-linux-gnu/13.2.0/lto-wrapper
Target: x86_64-linux-gnu
Configured with: /usr/src/gcc/configure --build=x86_64-linux-gnu
--disable-multilib --enable-languages=c,c++,fortran,go
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 13.2.0 (GCC)
I'm interested in fixing this bug, and I've started digging into the code.
