Align with Linux kernel.

Signed-off-by: Masahiro Yamada <[email protected]>
---

 Makefile | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index da01ca5b0..a4aac3db4 100644
--- a/Makefile
+++ b/Makefile
@@ -363,8 +363,8 @@ HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null)
 
 HOSTCC       = gcc
 HOSTCXX      = g++
-KBUILD_HOSTCFLAGS   := -Wall -Wstrict-prototypes -O2 \
-               -fomit-frame-pointer $(HOST_LFS_CFLAGS) \
+KBUILD_HOSTCFLAGS   := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \
+               -fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS) \
                $(HOSTCFLAGS)
 KBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS)
 KBUILD_HOSTLDFLAGS  := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS)
-- 
2.25.1


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