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fs/proc: Add compiler check for -Wno-override-init to support gcc < 4.2

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With gcc < 4.2 (e.g. 4.1.2):

      CC      fs/proc/task_mmu.o
    cc1: error: unrecognized command line option "-Wno-override-init"

To fix this, only enable the compiler option when it is actually
supported by the compiler.

Fixes: ca52953f5f24 ("fs/proc/task_mmu.c: suppress compilation warnings with W=1")
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Valdis Kletnieks <valdis.kletnieks@vt.edu>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Geert Uytterhoeven 2016-08-03 17:33:32 +02:00 committed by Linus Torvalds
parent f0936155f2
commit 4b2e0162e4
1 changed files with 1 additions and 1 deletions
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2
fs/proc/Makefile
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@ -4,7 +4,7 @@
obj-y += proc.o
CFLAGS_task_mmu.o += -Wno-override-init
CFLAGS_task_mmu.o += $(call cc-option,-Wno-override-init,)
proc-y := nommu.o task_nommu.o
proc-$(CONFIG_MMU) := task_mmu.o