If the vla parameter has a const specifier, the compiler will warn about
mismatched bounds:
$ cat mwe.c
extern void mwe(const int len, char buf[len]);
void mwe(const int len, char buf[len]) {}
$ make CFLAGS=-Wvla-parameter mwe.o
cc -Wvla-parameter -c -o mwe.o mwe.c
mwe.c:2:30: warning: argument 2 of type ‘char[len]’ declared with mismatched bound ‘len’ [-Wvla-parameter]
2 | void mwe(const int len, char buf[len]) {}
| ~~~~~^~~~~~~~
mwe.c:1:37: note: previously declared as ‘char[len]’ with bound ‘len’
1 | extern void mwe(const int len, char buf[len]);
| ~~~~~^~~~~~~~
On some code bases it might result in a lot of false positive warnings,
which can indeed be easily disabled, but on the other this workaround
might hide some real issues, so lets rather fix the compiler and make it
more reliable.
References: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101289
Signed-off-by: Andrey Erokhin <a.erokhin@inango-systems.com>
Signed-off-by: Petr Štetiar <ynezz@true.cz> [commit message]
Applications with libmbedtls, e.g. curl, fail on mpc85xx with:
curl[7227]: illegal instruction (4) at b7c94288 nip b7c94288 lr b7c6b528 code 1 in libmbedcrypto.so.2.28.1[b7c3e000+7e000]
curl[7227]: code: 3d7e0000 809e8004 91490000 816b814c 7d6903a6 4e800421 80010024 83c10018
curl[7227]: code: 38210020 7c0803a6 4e800020 9421fff0 <7d4d42e6> 7c6c42e6 7d2d42e6 7c0a4840
This is due to a bug in gcc-11.2.0. It is fixed with gcc-11.3.0.
Import the patch that is fixing the issue.
Signed-off-by: Nick Hainke <vincent@systemli.org>
This patch has been upstream since GCC 10.
Dragan Mladjenovic (2):
Emit .note.GNU-stack for soft-float linux targets.
Emit .note.GNU-stack for hard-float linux targets.
Link: https://gcc.gnu.org/g:a3c1e1f2ff88
Link: https://gcc.gnu.org/g:54b3d52c3cca
Add backport patch to define TARGET_LIBC_GNUSTACK on musl to add
.note.GNU-stack on hard-float MIPS targets.
Link: https://gcc.gnu.org/g:25abbb924968
The net effect should be the exact same functionality while following
upstream code instead of a custom outdated patch.
Signed-off-by: Ilya Lipnitskiy <ilya.lipnitskiy@gmail.com>
Added patch for GCC to fix compilation issues on MacOS arm64
The original commit message from Przemysław Buczkowski:
GCC: Patch for Apple Silicon compatibility
This patch fixes a linker error occuring when compiling
the cross-compiler on macOS and ARM64 architecture.
Adapted from:
https://github.com/richfelker/musl-cross-make/issues/116#issuecomment-823612404
Signed-off-by: Sergey V. Lobanov <sergey@lobanov.in>
