linux-kernel - [PATCH] x86/build: Permit building with old make versions

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Date:   Tue, 23 May 2017 18:27:54 +0200
From:   Jan Kiszka <jan.kiszka@...mens.com>
To:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>, x86 <x86@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Cc:     Josh Poimboeuf <jpoimboe@...hat.com>
Subject: [PATCH] x86/build: Permit building with old make versions

At least make 3.82 dislikes the tab in front of the $(warning) function:

arch/x86/Makefile:162: *** recipe commences before first target.  Stop.

Let's be gentle.

Signed-off-by: Jan Kiszka <jan.kiszka@...mens.com>
---
 arch/x86/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/Makefile b/arch/x86/Makefile
index 49d160b781f0..e98105ceabdf 100644
--- a/arch/x86/Makefile
+++ b/arch/x86/Makefile
@@ -159,7 +159,7 @@ ifdef CONFIG_FUNCTION_GRAPH_TRACER
 	# If '-Os' is enabled, disable it and print a warning.
         ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
           undefine CONFIG_CC_OPTIMIZE_FOR_SIZE
-	  $(warning Disabling CONFIG_CC_OPTIMIZE_FOR_SIZE.  Your compiler does not have -mfentry so you cannot optimize for size with CONFIG_FUNCTION_GRAPH_TRACER.)
+          $(warning Disabling CONFIG_CC_OPTIMIZE_FOR_SIZE.  Your compiler does not have -mfentry so you cannot optimize for size with CONFIG_FUNCTION_GRAPH_TRACER.)
         endif
 
     endif