samples/bpf: Use own flags but not HOSTCFLAGS

While compiling natively, the host's cflags and ldflags are equal to
ones used from HOSTCFLAGS and HOSTLDFLAGS. When cross compiling it
should have own, used for target arch. While verification, for arm,
arm64 and x86_64 the following flags were used always:

-Wall -O2
-fomit-frame-pointer
-Wmissing-prototypes
-Wstrict-prototypes

So, add them as they were verified and used before adding
Makefile.target and lets omit "-fomit-frame-pointer" as were proposed
while review, as no sense in such optimization for samples.

Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20191011002808.28206-10-ivan.khoronzhuk@linaro.org

diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile
index 91bfb421c278f39d4b10db7f97f2813cf59a4adb..57a15ff938a6a4a55dbab98b792e0fdaea3afac5 100644 (file)
--- a/samples/bpf/Makefile
+++ b/samples/bpf/Makefile
@@ -176,8 +176,10 @@ BPF_EXTRA_CFLAGS := $(ARM_ARCH_SELECTOR)
 TPROGS_CFLAGS += $(ARM_ARCH_SELECTOR)
 endif
 
-TPROGS_LDLIBS := $(KBUILD_HOSTLDLIBS)
-TPROGS_CFLAGS += $(KBUILD_HOSTCFLAGS) $(HOST_EXTRACFLAGS)
+TPROGS_CFLAGS += -Wall -O2
+TPROGS_CFLAGS += -Wmissing-prototypes
+TPROGS_CFLAGS += -Wstrict-prototypes
+
 TPROGS_CFLAGS += -I$(objtree)/usr/include
 TPROGS_CFLAGS += -I$(srctree)/tools/lib/bpf/
 TPROGS_CFLAGS += -I$(srctree)/tools/testing/selftests/bpf/