[RFC Patch] kbuild: remove -Wdeclaration-after-statement

[Amerigo Wang]

I got lots of "ISO C90 forbids mixed declarations and code" warnings
during compile today's kernel.

I think we can remove the gcc option '-Wdeclaration-after-statement'
now, since we already have C99 for 10 years. :)

Signed-off-by: WANG Cong <amwang@xxxxxxxxxx>
Cc: Sam Ravnborg <sam@xxxxxxxxxxxx>

---
diff --git a/Makefile b/Makefile
index 433493a..038bda2 100644
--- a/Makefile
+++ b/Makefile
@@ -559,9 +559,6 @@ endif
 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
 CHECKFLAGS     += $(NOSTDINC_FLAGS)
 
-# warn about C99 declaration after statement
-KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
-
 # disable pointer signed / unsigned warnings in gcc 4.0
 KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
 
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