This fixes compilation with GCC >= 12.x, which is unhappy about the use
after free:
/home/maribu/Repos/software/RIOT/build/pkg/ccn-lite/src/ccnl-core/src/ccnl-relay.c: In function 'ccnl_fib_rem_entry':
/home/maribu/Repos/software/RIOT/build/pkg/ccn-lite/src/ccnl-core/src/ccnl-relay.c:916:16: error: pointer 'fwd' used after 'free' [-Werror=use-after-free]
916 | if (fwd->face) {
| ~~~^~~~~~
In file included from /home/maribu/Repos/software/RIOT/build/pkg/ccn-lite/src/ccnl-core/src/ccnl-relay.c:33:
/home/maribu/Repos/software/RIOT/build/pkg/ccn-lite/src/ccnl-core/../ccnl-riot/include/ccn-lite-riot.h:52:41: note: call to 'free' here
52 | #define ccnl_free(p) free(p)
| ^~~~~~~
/home/maribu/Repos/software/RIOT/build/pkg/ccn-lite/src/ccnl-core/src/ccnl-relay.c:910:13: note: in expansion of macro 'ccnl_free'
910 | ccnl_free(fwd);
| ^~~~~~~~~
/home/maribu/Repos/software/RIOT/build/pkg/ccn-lite/src/ccnl-core/src/ccnl-relay.c: In function 'ccnl_fib_rem_entry':
/home/maribu/Repos/software/RIOT/build/pkg/ccn-lite/src/ccnl-core/src/ccnl-relay.c:916:16: error: pointer 'fwd' used after 'free' [-Werror=use-after-free]
916 | if (fwd->face) {
| ~~~^~~~~~
In file included from /home/maribu/Repos/software/RIOT/build/pkg/ccn-lite/src/ccnl-core/src/ccnl-relay.c:33:
/home/maribu/Repos/software/RIOT/build/pkg/ccn-lite/src/ccnl-riot/include/ccn-lite-riot.h:52:41: note: call to free' here
52 | #define ccnl_free(p) free(p)
| ^~~~~~~
/home/maribu/Repos/software/RIOT/build/pkg/ccn-lite/src/ccnl-core/src/ccnl-relay.c:910:13: note: in expansion of macro 'ccnl_free'
910 | ccnl_free(fwd);
| ^~~~~~~~~
Move some variables from stack to `.bss` / `.data` to avoid stack
overflows, which are detected by the MPU stack guard (e.g. on the
Nucleo-F767ZI that I used) and results in the test failing.
The previous implementation used creative construct for impedance
mismatching between the core list API (which returns a ptr to the
removed element if found) and the GNRC pkt list API (which returns a
ptr to the new list head) that creates a temporary list head on the
stack.
I'm not entirely sure if the previous implementation is containing
undefined behavior that is used against us with GCC >= 12.x, or if this
is a compiler bug. In either case, not reusing the core list API here
and just having a textbook linked list delete function here is not much
less readable and fixes the issue for our users.
This fixes a signature mismatch between forward declaration and
implementation, which in turn fixes the following error during
compilation:
/home/maribu/Repos/software/RIOT/build/pkg/wolfssl/wolfcrypt/src/ge_low_mem.c:179:30: error: argument 1 of type 'unsigned char[64]' with mismatched bound [-Werror=array-parameter=]
179 | void sc_reduce(unsigned char x[64])
| ~~~~~~~~~~~~~~^~~~~
In file included from /home/maribu/Repos/software/RIOT/build/pkg/wolfssl/wolfcrypt/src/ge_low_mem.c:34:
/home/maribu/Repos/software/RIOT/build/pkg/wolfssl/wolfssl/wolfcrypt/ge_operations.h:81:36: note: previously declared as 'byte *' {aka 'unsigned char *'}
81 | WOLFSSL_LOCAL void sc_reduce(byte* s);
| ~~~~~~^
The `mpu_stack_guard` test intentionally overflows the stack with a
stupid infinite recursion. Newer versions of GCC started to dislike
this, so this disables the corresponding diagnostics to get the
intentional stack overflow still compiled.
Add `search_parent_directories=True` to `git.Repo()` so that
`backport_pr.py` can be called anywhere within the RIOT git repo
without manually passing the repo root path via `--gitdir`.
Previously the tool had to be called from the RIOT base repo.
flatc uses `strto<foo>_l()` over `strto<foo>()` when available, so that
they behave reproducible. The musl libc has no locale support, which
has the added benefit of reproducible behavior being the default.
For some reason a `strtof_l()` compatibility wrapper was added in
musl, but the other `strto<foo>_l()` wrappers are missing. This
adds a patch to check for `strtoull_l()` instead of `strtof_l()`. This
will not make a difference on a libc that supports all of them, but
fixes compilation on musl.
The test for the requirement of disabling wchar_t size warnings assumed
that $(CC) is used for linking, instead of $(LINK). With GCC $(LINK)
and $(CC) happen to be (in most cases) identical, but with LLVM they
are not. This results in issues with compiling with LLVM.
GCC on some platforms does need an executable stack to generate
trampoline code, but use of nested functions is not allowed in
RIOT's code base anyway.
