linux-kernel - [PATCH] samples: fanotify: add CC_CAN

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Message-Id: <20211029113403.848239-1-arnd@kernel.org>
Date:   Fri, 29 Oct 2021 13:33:35 +0200
From:   Arnd Bergmann <arnd@...nel.org>
To:     Jan Kara <jack@...e.cz>,
        Gabriel Krisman Bertazi <krisman@...labora.com>,
        Amir Goldstein <amir73il@...il.com>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        linux-kernel@...r.kernel.org, llvm@...ts.linux.dev
Subject: [PATCH] samples: fanotify: add CC_CAN_LINK dependency

From: Arnd Bergmann <arnd@...db.de>

When using a cross tools that only works for kernels, the
newn sample can end up with a link failure such as:

/usr/bin/ld: unrecognised emulation mode: aarch64linux
Supported emulations: elf_x86_64 elf32_x86_64 elf_i386 elf_iamcu elf_l1om elf_k1om i386pep i386pe
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make[5]: *** [/git/arm-soc/scripts/Makefile.userprogs:28: samples/fanotify/fs-monitor] Error 1

Add a Kconfig dependency, similar to the one we use for
other samples.

Fixes: 5451093081db ("samples: Add fs error monitoring example")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 samples/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/samples/Kconfig b/samples/Kconfig
index 147a16dafaf8..83f12c1e9ca6 100644
--- a/samples/Kconfig
+++ b/samples/Kconfig
@@ -122,7 +122,7 @@ config SAMPLE_CONNECTOR
 
 config SAMPLE_FANOTIFY_ERROR
 	bool "Build fanotify error monitoring sample"
-	depends on FANOTIFY
+	depends on CC_CAN_LINK && FANOTIFY
 	help
 	  When enabled, this builds an example code that uses the
 	  FAN_FS_ERROR fanotify mechanism to monitor filesystem
-- 
2.29.2