linux-kernel - Re: [PATCH v4] Makefile.compiler: replace cc-ifversion with compiler-specific macros

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Message-ID: <CAKwvOdmoHCwazcTpF=jDc_ghu09OCSkrSZ-ZP4rHNtO54n-aRw@mail.gmail.com>
Date:   Mon, 26 Sep 2022 14:41:00 -0700
From:   Nick Desaulniers <ndesaulniers@...gle.com>
To:     Masahiro Yamada <masahiroy@...nel.org>
Cc:     Michal Marek <michal.lkml@...kovi.net>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        clang-built-linux <llvm@...ts.linux.dev>,
        Bill Wendling <morbo@...gle.com>,
        Nathan Chancellor <nathan@...nel.org>
Subject: Re: [PATCH v4] Makefile.compiler: replace cc-ifversion with
 compiler-specific macros

On Sat, Sep 24, 2022 at 6:23 PM Masahiro Yamada <masahiroy@...nel.org> wrote:
>
> > I noticed a small flaw now.
> >
> >
> >
> > $ make mrproper; make
> > /bin/sh: 1: [: -ge: unexpected operator
> > ***
> > *** Configuration file ".config" not found!
> > ***
> > *** Please run some configurator (e.g. "make oldconfig" or
> > *** "make menuconfig" or "make xconfig").
> > ***
> > Makefile:711: include/config/auto.conf.cmd: No such file or directory
> > make: *** [Makefile:720: .config] Error 1
> >
> >
> >
> >
> >
> >
> >
> >
> > This fails anyway, but it shows annoying
> >
> >    /bin/sh: 1: [: -ge: unexpected operator
> >
> >
> >
> > It is emit by this line:
> >
> >   KBUILD_CFLAGS-$(call gcc-min-version, 90100) += -Wno-alloc-size-larger-than
> >
> >
> >
> >
> > When $(CONFIG_GCC_VERSION) is empty, it becomes invalid shell code:
> >
> >      [ -ge $(1) ] && echo y
> >
> >
> >
> >
> >
> > Now I just recalled why I wrote the original code like this:
> >
> >
> >   cc-ifversion = $(shell [ $(CONFIG_GCC_VERSION)0 $(1) $(2)000 ]  ...
> >
> >
> >
> >
> > --
> > Best Regards
> > Masahiro Yamada
>
>
>
>
>
>
>
> I squashed the following code diff.
> Please let me know if there is a problem.

LGTM; thanks (again).

>
>
>
>
>
>
>
>
>
> diff --git a/scripts/Makefile.compiler b/scripts/Makefile.compiler
> index 9d18fb91890e..20d353dcabfb 100644
> --- a/scripts/Makefile.compiler
> +++ b/scripts/Makefile.compiler
> @@ -63,11 +63,11 @@ cc-disable-warning = $(call try-run,\
>
>  # gcc-min-version
>  # Usage: cflags-$(call gcc-min-version, 70100) += -foo
> -gcc-min-version = $(shell [ $(CONFIG_GCC_VERSION) -ge $(1) ] && echo y)
> +gcc-min-version = $(shell [ $(CONFIG_GCC_VERSION)0 -ge $(1)0 ] && echo y)
>
>  # clang-min-version
>  # Usage: cflags-$(call clang-min-version, 110000) += -foo
> -clang-min-version = $(shell [ $(CONFIG_CLANG_VERSION) -ge $(1) ] && echo y)
> +clang-min-version = $(shell [ $(CONFIG_CLANG_VERSION)0 -ge $(1)0 ] && echo y)
>
>  # ld-option
>  # Usage: KBUILD_LDFLAGS += $(call ld-option, -X, -Y)
>
>
>
>
>
>
> --
> Best Regards
> Masahiro Yamada
>


-- 
Thanks,
~Nick Desaulniers