[yocto] linux/bpf.h: no such file or directory

[Burton, Ross]

Don't use gcc, use $(CC).

Ross

On Thu, 17 Jan 2019 at 14:50, Maytar Byle <maytarb at gmail.com> wrote:
>
> Hey all,
>
> I've wrote a basic recipe to compile few C files and when i compile it, i get the above error. I looked in 'sysroots/qemux86-64/usr/include/linux/' and it contains bpf.h.
>
> The recipe:
> SRC_URI = "file://dir"
>
> S = "${WORKDIR}/dir"
>
> do_install() {
>     install -d ${D}/home/user/dir
>
>     oe_runmake DESTDIR=${D}/home/user/dir install
> }
>
> with the following Makefile:
> SRC_FILES := $(wildcard *.c)
> OUT_FILES := $(patsubst %.c,%.out,$(SRC_FILES))
>
> all: $(OUT_FILES)
>
> %.out: %.c
> gcc -o $@ $^
> ...
>
> The C file include lines goes as follow:
> #include <asm/types.h>
> #include <linux/netlink.h>
> #include <linux/rtnetlink.h>
> ....
> #include <linux/bpf.h>
> #include <linux/filter.h>
>
> When i try to build the image using `bitbake core-image-minimal` i get:
> DEBUG: Executing shell function do_compile
> NOTE: make -j 6
> gcc -o a.out a.c
> a.c:78:23: fatal error: linux/bpf.h: No such file or directory
>  #include <linux/bpf.h>
>                        ^
> compilation terminated.
> make: *** [a.out] Error 1
> WARNING: exit code 1 from a shell command.
> ERROR: oe_runmake failed
> ERROR: Function failed: do_compile (log file is located at /yocto/build/tmp/work/core2-64-poky-linux/example/1.0-r0/temp/log.do_compile.26127)
>
> Could also be relevant - entries from my local.conf:
> PREFERRED_PROVIDER_virtual/kernel = "linux-yocto"
> GCCVERSION ?= "4.9.%"
> SDKGCCVERSION ?= "4.9.%"
>
> Also, it is weird for me that it gets to 'linux/bpf.h' before it fails because it includes files from the linux dir before that.. Can someone shed some light on that? Any directions i should look into?
> --
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