I thought header search paths to tools/include(/uapi) were unneeded, but it looks like a build error occurs depending on the compiler.
Commit 303a339f30a9 ("bpfilter: remove extra header search paths for bpfilter_umh") reintroduced the build error fixed by commit ae40832e53c3 ("bpfilter: fix a build err"). Apology for the breakage, and thanks to Guenter for reporting this. Fixes: 303a339f30a9 ("bpfilter: remove extra header search paths for bpfilter_umh") Reported-by: Guenter Roeck <li...@roeck-us.net> Signed-off-by: Masahiro Yamada <yamada.masah...@socionext.com> --- Guenter, Sorry for bothering you, but could you please test this with your compiler? I am also using GCC 7.3, but my compiler cannot reproduce the build error. net/bpfilter/Makefile | 1 + 1 file changed, 1 insertion(+) diff --git a/net/bpfilter/Makefile b/net/bpfilter/Makefile index 5d6c776..854395f 100644 --- a/net/bpfilter/Makefile +++ b/net/bpfilter/Makefile @@ -5,6 +5,7 @@ hostprogs-y := bpfilter_umh bpfilter_umh-objs := main.o +KBUILD_HOSTCFLAGS += -Itools/include/ -Itools/include/uapi HOSTCC := $(CC) ifeq ($(CONFIG_BPFILTER_UMH), y) -- 2.7.4