[PATCH] Makefile.flags: suppress clang warnings when cross-compiling

[Denys Vlasenko]

Applied, thank you!

On Tue, Jan 2, 2024 at 10:08 AM Ron Yorston <rmy at pobox.com> wrote:
>
> Extend the changes introduced by commit b4ef2e3467 (Makefile.flags:
> suppress some clang-9 warnings) so they also cover the case where
> clang is used as a cross-compiler.
>
> Signed-off-by: Ron Yorston <rmy at pobox.com>
> ---
>  Makefile.flags | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/Makefile.flags b/Makefile.flags
> index e4cd658fd..97cb4dca2 100644
> --- a/Makefile.flags
> +++ b/Makefile.flags
> @@ -48,7 +48,7 @@ endif
>  # gcc 3.x emits bogus "old style proto" warning on find.c:alloc_action()
>  CFLAGS += $(call cc-ifversion, -ge, 0400, -Wold-style-definition)
>
> -ifneq ($(CC),clang)
> +ifneq ($(lastword $(subst -, ,$(CC))),clang)
>  # "clang-9: warning: optimization flag '-finline-limit=0' is not supported
>  CFLAGS += $(call cc-option,-finline-limit=0,)
>  endif
> @@ -66,7 +66,7 @@ CFLAGS += $(call cc-option,-static-libgcc,)
>  endif
>
>  CFLAGS += $(call cc-option,-falign-functions=1,)
> -ifneq ($(CC),clang)
> +ifneq ($(lastword $(subst -, ,$(CC))),clang)
>  # "clang-9: warning: optimization flag '-falign-jumps=1' is not supported" (and same for other two)
>  CFLAGS += $(call cc-option,-falign-jumps=1 -falign-labels=1 -falign-loops=1,)
>  endif
> @@ -79,7 +79,7 @@ CFLAGS += $(call cc-option,-fno-asynchronous-unwind-tables,)
>  CFLAGS += $(call cc-option,-fno-builtin-printf,)
>
>  # clang-9 does not like "str" + N and "if (CONFIG_ITEM && cond)" constructs
> -ifeq ($(CC),clang)
> +ifeq ($(lastword $(subst -, ,$(CC))),clang)
>  CFLAGS += $(call cc-option,-Wno-string-plus-int -Wno-constant-logical-operand)
>  endif
>
> --
> 2.43.0
>
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