-Wstrict-prototype is added to KBUILD_CFLAGS first, then overridden
by -Werror=strict-prototype later.

Let's add -Werror=strict-prototypes unconditionally because it is
supported by GCC 4.6, and also by Clang.

Signed-off-by: Masahiro Yamada <yamada.masah...@socionext.com>
---

 Makefile | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/Makefile b/Makefile
index 3bbc16a..bcb943e 100644
--- a/Makefile
+++ b/Makefile
@@ -423,7 +423,7 @@ LINUXINCLUDE    := \
                $(USERINCLUDE)
 
 KBUILD_AFLAGS   := -D__ASSEMBLY__ -fno-PIE
-KBUILD_CFLAGS   := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
+KBUILD_CFLAGS   := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \
                   -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \
                   -Werror-implicit-function-declaration \
                   -Wno-format-security \
@@ -828,9 +828,6 @@ KBUILD_CFLAGS   += $(call cc-option,-fconserve-stack)
 # disallow errors like 'EXPORT_GPL(foo);' with missing header
 KBUILD_CFLAGS   += $(call cc-option,-Werror=implicit-int)
 
-# require functions to have arguments in prototypes, not empty 'int foo()'
-KBUILD_CFLAGS   += $(call cc-option,-Werror=strict-prototypes)
-
 # Prohibit date/time macros, which would make the build non-deterministic
 KBUILD_CFLAGS   += $(call cc-option,-Werror=date-time)
 
-- 
2.7.4

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