linux-kernel - Re: Build error: ‘EM

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Date:   Mon, 13 Sep 2021 10:49:14 +0800
From:   Miles Chen <miles.chen@...iatek.com>
To:     Stefan Wahren <stefan.wahren@...e.com>,
        Jisheng Zhang <jszhang@...nel.org>,
        open list <linux-kernel@...r.kernel.org>,
        "Palmer Dabbelt" <palmerdabbelt@...gle.com>
Subject: Re: Build error: ‘EM_RISCV’ undeclared

On Sun, 2021-09-12 at 12:29 +0200, Stefan Wahren wrote:
> Hi,
> 
> i tried to compile current torvalds tree
> ("78e709522d2c012cb0daad2e668506637bffb7c2") for
> arm/multi_v7_defconfig
> and get the following build issue:
> 
>   UPD     include/generated/utsrelease.h
> scripts/sorttable.c: In function ‘do_file’:
> scripts/sorttable.c:352:7: error: ‘EM_RISCV’ undeclared (first use in
> this function)
>   case EM_RISCV:
>        ^
> scripts/sorttable.c:352:7: note: each undeclared identifier is
> reported
> only once for each function it appears in
> 
> I assume this is caused by:
> 
> 54fed35fd3939398be292e4090b0b1c5ff2238b4 ("riscv: Enable
> BUILDTIME_TABLE_SORT")

I hit this error too. I add the follow conditional EM_RISCV
definition in sorttable.c to build pass (arm64/defconfig).

I will submit a patch out.

diff --git a/scripts/sorttable.c b/scripts/sorttable.c
index f355869c65cd..6ee4fa882919 100644
--- a/scripts/sorttable.c
+++ b/scripts/sorttable.c
@@ -54,6 +54,10 @@
 #define EM_ARCV2       195
 #endif

+#ifndef EM_RISCV
+#define EM_RISCV       243
+#endif
+
> 
> Best regards
> Stefan
> 
>