On Wed, 1 Feb 2023 at 15:44, Rob Herring <robh@xxxxxxxxxx> wrote:
>
> Commit a41509bea3e7 ("libfdt: Replace deprecated 0-length arrays with
> proper flexible arrays") fails to build pylibfdt:
>
> ./pylibfdt/libfdt_wrap.c: In function ‘_wrap_fdt_node_header_name_set’:
> ./pylibfdt/libfdt_wrap.c:4350:18: error: cast specifies array type
> 4350 | arg1->name = (char [])(char *)memcpy(malloc((size)*sizeof(char)), (const char *)(arg2), sizeof(char)*(size));
> | ^
> ./pylibfdt/libfdt_wrap.c:4350:16: error: invalid use of flexible array member
> 4350 | arg1->name = (char [])(char *)memcpy(malloc((size)*sizeof(char)), (const char *)(arg2), sizeof(char)*(size));
> | ^
> ./pylibfdt/libfdt_wrap.c:4352:16: error: invalid use of flexible array member
> 4352 | arg1->name = 0;
> | ^
> ./pylibfdt/libfdt_wrap.c: In function ‘_wrap_fdt_property_data_set’:
> ./pylibfdt/libfdt_wrap.c:4613:18: error: cast specifies array type
> 4613 | arg1->data = (char [])(char *)memcpy(malloc((size)*sizeof(char)), (const char *)(arg2), sizeof(char)*(size));
> | ^
> ./pylibfdt/libfdt_wrap.c:4613:16: error: invalid use of flexible array member
> 4613 | arg1->data = (char [])(char *)memcpy(malloc((size)*sizeof(char)), (const char *)(arg2), sizeof(char)*(size));
> | ^
> ./pylibfdt/libfdt_wrap.c:4615:16: error: invalid use of flexible array member
> 4615 | arg1->data = 0;
> | ^
>
> Turns out this is known issue with SWIG: https://github.com/swig/swig/issues/1699
>
> Implement the work-around to ignore the flexible array member.
>
> Fixes: a41509bea3e7 ("libfdt: Replace deprecated 0-length arrays with proper flexible arrays")
> Cc: Kees Cook <keescook@xxxxxxxxxxxx>
> Cc: Simon Glass <sjg@xxxxxxxxxxxx>
> Signed-off-by: Rob Herring <robh@xxxxxxxxxx>
> ---
> pylibfdt/libfdt.i | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/pylibfdt/libfdt.i b/pylibfdt/libfdt.i
> index f9f7e7e66d13..987f7b9c3339 100644
> --- a/pylibfdt/libfdt.i
> +++ b/pylibfdt/libfdt.i
> @@ -1036,6 +1036,9 @@ class NodeAdder():
>
> %rename(fdt_property) fdt_property_func;
>
> +%immutable fdt_property::data;
> +%immutable fdt_node_header::name;
> +
> /*
> * fdt32_t is a big-endian 32-bit value defined to uint32_t in libfdt_env.h
> * so use the same type here.
> --
> 2.39.0
>
Reviewed-by: Simon Glass <sjg@xxxxxxxxxxxx>
Just 'make check':
Tested-by: Simon Glass <sjg@xxxxxxxxxxxx>
