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From: Yonghong Song <yhs@fb.com>
To: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org>,
	"ast@kernel.org" <ast@kernel.org>,
	"daniel@iogearbox.net" <daniel@iogearbox.net>,
	"davem@davemloft.net" <davem@davemloft.net>,
	"jakub.kicinski@netronome.com" <jakub.kicinski@netronome.com>,
	"hawk@kernel.org" <hawk@kernel.org>,
	"john.fastabend@gmail.com" <john.fastabend@gmail.com>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
	"bpf@vger.kernel.org" <bpf@vger.kernel.org>,
	"clang-built-linux@googlegroups.com" 
	<clang-built-linux@googlegroups.com>
Subject: Re: [PATCH bpf-next 08/11] samples: bpf: makefile: base progs build on makefile.progs
Date: Fri, 13 Sep 2019 21:41:25 +0000
Message-ID: <dd4cd83f-7e35-ad07-8a53-d34c13c074a5@fb.com> (raw)
In-Reply-To: <20190910103830.20794-9-ivan.khoronzhuk@linaro.org>



On 9/10/19 11:38 AM, Ivan Khoronzhuk wrote:
> The main reason for that - HOSTCC and CC have different aims.
> It was tested for arm cross compilation, based on linaro toolchain,
> but should work for others.
> 
> In order to split cross compilation (CC) with host build (HOSTCC),
> lets base bpf samples on Makefile.progs. It allows to cross-compile
> samples/bpf progs with CC while auxialry tools running on host built
> with HOSTCC.

I got a compilation failure with the following error

$ make samples/bpf/
   ...
   LD  samples/bpf/hbm
   CC      samples/bpf/syscall_nrs.s
gcc: error: -pg and -fomit-frame-pointer are incompatible
make[2]: *** [samples/bpf/syscall_nrs.s] Error 1
make[1]: *** [samples/bpf/] Error 2
make: *** [sub-make] Error 2

Could you take a look?

> 
> Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org>
> ---
>   samples/bpf/Makefile | 138 +++++++++++++++++++++++--------------------
>   1 file changed, 73 insertions(+), 65 deletions(-)
> 
> diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile
> index f5dbf3d0c5f3..625a71f2e9d2 100644
> --- a/samples/bpf/Makefile
> +++ b/samples/bpf/Makefile
> @@ -4,55 +4,53 @@ BPF_SAMPLES_PATH ?= $(abspath $(srctree)/$(src))
>   TOOLS_PATH := $(BPF_SAMPLES_PATH)/../../tools
>   
>   # List of programs to build
> -hostprogs-y := test_lru_dist
> -hostprogs-y += sock_example
> -hostprogs-y += fds_example
> -hostprogs-y += sockex1
> -hostprogs-y += sockex2
> -hostprogs-y += sockex3
> -hostprogs-y += tracex1
> -hostprogs-y += tracex2
> -hostprogs-y += tracex3
> -hostprogs-y += tracex4
> -hostprogs-y += tracex5
> -hostprogs-y += tracex6
> -hostprogs-y += tracex7
> -hostprogs-y += test_probe_write_user
> -hostprogs-y += trace_output
> -hostprogs-y += lathist
> -hostprogs-y += offwaketime
> -hostprogs-y += spintest
> -hostprogs-y += map_perf_test
> -hostprogs-y += test_overhead
> -hostprogs-y += test_cgrp2_array_pin
> -hostprogs-y += test_cgrp2_attach
> -hostprogs-y += test_cgrp2_sock
> -hostprogs-y += test_cgrp2_sock2
> -hostprogs-y += xdp1
> -hostprogs-y += xdp2
> -hostprogs-y += xdp_router_ipv4
> -hostprogs-y += test_current_task_under_cgroup
> -hostprogs-y += trace_event
> -hostprogs-y += sampleip
> -hostprogs-y += tc_l2_redirect
> -hostprogs-y += lwt_len_hist
> -hostprogs-y += xdp_tx_iptunnel
> -hostprogs-y += test_map_in_map
> -hostprogs-y += per_socket_stats_example
> -hostprogs-y += xdp_redirect
> -hostprogs-y += xdp_redirect_map
> -hostprogs-y += xdp_redirect_cpu
> -hostprogs-y += xdp_monitor
> -hostprogs-y += xdp_rxq_info
> -hostprogs-y += syscall_tp
> -hostprogs-y += cpustat
> -hostprogs-y += xdp_adjust_tail
> -hostprogs-y += xdpsock
> -hostprogs-y += xdp_fwd
> -hostprogs-y += task_fd_query
> -hostprogs-y += xdp_sample_pkts
> -hostprogs-y += ibumad
> -hostprogs-y += hbm
> +progs-y := test_lru_dist
> +progs-y += sock_example
> +progs-y += fds_example
> +progs-y += sockex1
> +progs-y += sockex2
> +progs-y += sockex3
> +progs-y += tracex1
> +progs-y += tracex2
> +progs-y += tracex3
> +progs-y += tracex4
> +progs-y += tracex5
> +progs-y += tracex6
> +progs-y += tracex7
> +progs-y += test_probe_write_user
> +progs-y += trace_output
> +progs-y += lathist
> +progs-y += offwaketime
> +progs-y += spintest
> +progs-y += map_perf_test
> +progs-y += test_overhead
> +progs-y += test_cgrp2_array_pin
> +progs-y += test_cgrp2_attach
> +progs-y += test_cgrp2_sock
> +progs-y += test_cgrp2_sock2
> +progs-y += xdp1
> +progs-y += xdp2
> +progs-y += xdp_router_ipv4
> +progs-y += test_current_task_under_cgroup
> +progs-y += trace_event
> +progs-y += sampleip
> +progs-y += tc_l2_redirect
> +progs-y += lwt_len_hist
> +progs-y += xdp_tx_iptunnel
> +progs-y += test_map_in_map
> +progs-y += xdp_redirect_map
> +progs-y += xdp_redirect_cpu
> +progs-y += xdp_monitor
> +progs-y += xdp_rxq_info
> +progs-y += syscall_tp
> +progs-y += cpustat
> +progs-y += xdp_adjust_tail
> +progs-y += xdpsock
> +progs-y += xdp_fwd
> +progs-y += task_fd_query
> +progs-y += xdp_sample_pkts
> +progs-y += ibumad
> +progs-y += hbm
>   
>   # Libbpf dependencies
>   LIBBPF = $(TOOLS_PATH)/lib/bpf/libbpf.a
> @@ -111,7 +109,7 @@ ibumad-objs := bpf_load.o ibumad_user.o $(TRACE_HELPERS)
>   hbm-objs := bpf_load.o hbm.o $(CGROUP_HELPERS)
>   
>   # Tell kbuild to always build the programs
> -always := $(hostprogs-y)
> +always := $(progs-y)
>   always += sockex1_kern.o
>   always += sockex2_kern.o
>   always += sockex3_kern.o
> @@ -170,21 +168,6 @@ always += ibumad_kern.o
>   always += hbm_out_kern.o
>   always += hbm_edt_kern.o
>   
> -KBUILD_HOSTCFLAGS += -I$(objtree)/usr/include
> -KBUILD_HOSTCFLAGS += -I$(srctree)/tools/lib/bpf/
> -KBUILD_HOSTCFLAGS += -I$(srctree)/tools/testing/selftests/bpf/
> -KBUILD_HOSTCFLAGS += -I$(srctree)/tools/lib/ -I$(srctree)/tools/include
> -KBUILD_HOSTCFLAGS += -I$(srctree)/tools/perf
> -
> -HOSTCFLAGS_bpf_load.o += -Wno-unused-variable
> -
> -KBUILD_HOSTLDLIBS		+= $(LIBBPF) -lelf
> -HOSTLDLIBS_tracex4		+= -lrt
> -HOSTLDLIBS_trace_output	+= -lrt
> -HOSTLDLIBS_map_perf_test	+= -lrt
> -HOSTLDLIBS_test_overhead	+= -lrt
> -HOSTLDLIBS_xdpsock		+= -pthread
> -
>   # Strip all expet -D options needed to handle linux headers
>   # for arm it's __LINUX_ARM_ARCH__ and potentially others fork vars
>   D_OPTIONS = $(shell echo "$(KBUILD_CFLAGS) " | sed 's/[[:blank:]]/\n/g' | \
> @@ -194,6 +177,29 @@ ifeq ($(ARCH), arm)
>   CLANG_EXTRA_CFLAGS := $(D_OPTIONS)
>   endif
>   
> +ccflags-y += -I$(objtree)/usr/include
> +ccflags-y += -I$(srctree)/tools/lib/bpf/
> +ccflags-y += -I$(srctree)/tools/testing/selftests/bpf/
> +ccflags-y += -I$(srctree)/tools/lib/
> +ccflags-y += -I$(srctree)/tools/include
> +ccflags-y += -I$(srctree)/tools/perf
> +ccflags-y += $(D_OPTIONS)
> +ccflags-y += -Wall
> +ccflags-y += -fomit-frame-pointer
> +ccflags-y += -Wmissing-prototypes
> +ccflags-y += -Wstrict-prototypes
> +
> +PROGS_CFLAGS := $(ccflags-y)
> +
> +PROGCFLAGS_bpf_load.o += -Wno-unused-variable
> +
> +PROGS_LDLIBS			:= $(LIBBPF) -lelf
> +PROGLDLIBS_tracex4		+= -lrt
> +PROGLDLIBS_trace_output		+= -lrt
> +PROGLDLIBS_map_perf_test	+= -lrt
> +PROGLDLIBS_test_overhead	+= -lrt
> +PROGLDLIBS_xdpsock		+= -pthread
> +
>   # Allows pointing LLC/CLANG to a LLVM backend with bpf support, redefine on cmdline:
>   #  make samples/bpf/ LLC=~/git/llvm/build/bin/llc CLANG=~/git/llvm/build/bin/clang
>   LLC ?= llc
> @@ -284,6 +290,8 @@ $(obj)/hbm_out_kern.o: $(src)/hbm.h $(src)/hbm_kern.h
>   $(obj)/hbm.o: $(src)/hbm.h
>   $(obj)/hbm_edt_kern.o: $(src)/hbm.h $(src)/hbm_kern.h
>   
> +-include $(BPF_SAMPLES_PATH)/Makefile.prog
> +
>   # asm/sysreg.h - inline assembly used by it is incompatible with llvm.
>   # But, there is no easy way to fix it, so just exclude it since it is
>   # useless for BPF samples.
> 

  reply index

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-10 10:38 [PATCH bpf-next 00/11] samples: bpf: improve/fix cross-compilation Ivan Khoronzhuk
2019-09-10 10:38 ` [PATCH bpf-next 01/11] samples: bpf: makefile: fix HDR_PROBE "echo" Ivan Khoronzhuk
2019-09-10 10:46   ` Sergei Shtylyov
2019-09-10 14:54     ` Ivan Khoronzhuk
2019-09-11 11:02       ` Sergei Shtylyov
2019-09-13 19:56         ` Ivan Khoronzhuk
2019-09-10 10:38 ` [PATCH bpf-next 02/11] samples: bpf: makefile: fix cookie_uid_helper_example obj build Ivan Khoronzhuk
2019-09-13 20:48   ` Yonghong Song
2019-09-13 21:25     ` Ivan Khoronzhuk
2019-09-10 10:38 ` [PATCH bpf-next 03/11] samples: bpf: makefile: use --target from cross-compile Ivan Khoronzhuk
2019-09-10 10:38 ` [PATCH bpf-next 04/11] samples: bpf: use own EXTRA_CFLAGS for clang commands Ivan Khoronzhuk
2019-09-10 10:38 ` [PATCH bpf-next 05/11] samples: bpf: makefile: use D vars from KBUILD_CFLAGS to handle headers Ivan Khoronzhuk
2019-09-13 21:12   ` Yonghong Song
2019-09-13 21:24     ` Ivan Khoronzhuk
2019-09-10 10:38 ` [PATCH bpf-next 06/11] samples: bpf: makefile: drop unnecessarily inclusion for bpf_load Ivan Khoronzhuk
2019-09-10 10:38 ` [PATCH bpf-next 07/11] samples: bpf: add makefile.prog for separate CC build Ivan Khoronzhuk
2019-09-13 21:33   ` Yonghong Song
2019-09-13 22:14     ` Ivan Khoronzhuk
2019-09-10 10:38 ` [PATCH bpf-next 08/11] samples: bpf: makefile: base progs build on makefile.progs Ivan Khoronzhuk
2019-09-13 21:41   ` Yonghong Song [this message]
2019-09-13 22:25     ` Ivan Khoronzhuk
2019-09-10 10:38 ` [PATCH bpf-next 09/11] samples: bpf: makefile: use CC environment for HDR_PROBE Ivan Khoronzhuk
2019-09-10 10:38 ` [PATCH bpf-next 10/11] libbpf: makefile: add C/CXX/LDFLAGS to libbpf.so and test_libpf targets Ivan Khoronzhuk
2019-09-13 21:43   ` Yonghong Song
2019-09-13 22:33     ` Ivan Khoronzhuk
2019-09-10 10:38 ` [PATCH bpf-next 11/11] samples: bpf: makefile: add sysroot support Ivan Khoronzhuk
2019-09-13 21:45   ` Yonghong Song
2019-09-13 22:36     ` Ivan Khoronzhuk

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