From: Nicolas Schier <nicolas@fjasle.eu>
To: Ian Rogers <irogers@google.com>
Cc: Josh Poimboeuf <jpoimboe@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Nathan Chancellor <nathan@kernel.org>,
Nick Desaulniers <ndesaulniers@google.com>,
Tom Rix <trix@redhat.com>, Masahiro Yamada <masahiroy@kernel.org>,
linux-kernel@vger.kernel.org, llvm@lists.linux.dev,
Stephane Eranian <eranian@google.com>,
Andrii Nakryiko <andrii@kernel.org>, Jiri Olsa <jolsa@kernel.org>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Namhyung Kim <namhyung@kernel.org>
Subject: Re: [PATCH v3 3/3] objtool: Alter how HOSTCC is forced
Date: Thu, 12 Jan 2023 21:40:45 +0100 [thread overview]
Message-ID: <Y8BwTdwuDiDpsKB+@fjasle.eu> (raw)
In-Reply-To: <20230105090155.357604-4-irogers@google.com>
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On Thu, Jan 05, 2023 at 01:01:55AM -0800 Ian Rogers wrote:
> HOSTCC is always wanted when building objtool. Setting CC to HOSTCC
> happens after tools/scripts/Makefile.include is included, meaning
> flags are set assuming say CC is gcc, but then it can be later set to
> HOSTCC which may be clang. tools/scripts/Makefile.include is needed
> for host set up and common macros in objtool's Makefile. Rather than
> override CC to HOSTCC, just pass CC as HOSTCC to Makefile.build, the
> libsubcmd builds and the linkage step. This means the Makefiles don't
> see things like CC changing and tool flag determination, and similar,
> work properly. To avoid mixing CFLAGS from different compilers just
> the objtool CFLAGS are determined with the exception of
> EXTRA_WARNINGS. HOSTCFLAGS is added to these so that command line
> flags can add to the CFLAGS.
>
> Signed-off-by: Ian Rogers <irogers@google.com>
> ---
> tools/objtool/Makefile | 25 +++++++++++++++----------
> 1 file changed, 15 insertions(+), 10 deletions(-)
>
Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>
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next prev parent reply other threads:[~2023-01-12 20:56 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-05 9:01 [PATCH v3 0/3] objtool build improvements Ian Rogers
2023-01-05 9:01 ` [PATCH v3 1/3] objtool: Install libsubcmd in build Ian Rogers
2023-01-12 20:25 ` Nicolas Schier
2023-01-12 20:54 ` Ian Rogers
2023-01-26 1:46 ` Josh Poimboeuf
2023-01-26 17:50 ` Ian Rogers
2023-01-05 9:01 ` [PATCH v3 2/3] objtool: Properly support make V=1 Ian Rogers
2023-01-12 20:31 ` Nicolas Schier
2023-01-05 9:01 ` [PATCH v3 3/3] objtool: Alter how HOSTCC is forced Ian Rogers
2023-01-09 23:05 ` Nick Desaulniers
2023-01-12 20:40 ` Nicolas Schier [this message]
2023-01-26 1:49 ` Josh Poimboeuf
2023-01-26 18:30 ` Ian Rogers
2023-01-12 17:41 ` [PATCH v3 0/3] objtool build improvements Ian Rogers
2023-01-19 16:12 ` Ian Rogers
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