samples/bpf/Makefile

   1 # kbuild trick to avoid linker error. Can be omitted if a module is built.
   2 obj- := dummy.o
   3
   4 # List of programs to build
   5 hostprogs-y := test_verifier test_maps
   6 hostprogs-y += sock_example
   7 hostprogs-y += fds_example
   8 hostprogs-y += sockex1
   9 hostprogs-y += sockex2
  10 hostprogs-y += sockex3
  11 hostprogs-y += tracex1
  12 hostprogs-y += tracex2
  13 hostprogs-y += tracex3
  14 hostprogs-y += tracex4
  15 hostprogs-y += tracex5
  16 hostprogs-y += tracex6
  17 hostprogs-y += trace_output
  18 hostprogs-y += lathist
  19 hostprogs-y += offwaketime
  20 hostprogs-y += spintest
  21 hostprogs-y += map_perf_test
  22 hostprogs-y += test_overhead
  23
  24 test_verifier-objs := test_verifier.o libbpf.o
  25 test_maps-objs := test_maps.o libbpf.o
  26 sock_example-objs := sock_example.o libbpf.o
  27 fds_example-objs := bpf_load.o libbpf.o fds_example.o
  28 sockex1-objs := bpf_load.o libbpf.o sockex1_user.o
  29 sockex2-objs := bpf_load.o libbpf.o sockex2_user.o
  30 sockex3-objs := bpf_load.o libbpf.o sockex3_user.o
  31 tracex1-objs := bpf_load.o libbpf.o tracex1_user.o
  32 tracex2-objs := bpf_load.o libbpf.o tracex2_user.o
  33 tracex3-objs := bpf_load.o libbpf.o tracex3_user.o
  34 tracex4-objs := bpf_load.o libbpf.o tracex4_user.o
  35 tracex5-objs := bpf_load.o libbpf.o tracex5_user.o
  36 tracex6-objs := bpf_load.o libbpf.o tracex6_user.o
  37 trace_output-objs := bpf_load.o libbpf.o trace_output_user.o
  38 lathist-objs := bpf_load.o libbpf.o lathist_user.o
  39 offwaketime-objs := bpf_load.o libbpf.o offwaketime_user.o
  40 spintest-objs := bpf_load.o libbpf.o spintest_user.o
  41 map_perf_test-objs := bpf_load.o libbpf.o map_perf_test_user.o
  42 test_overhead-objs := bpf_load.o libbpf.o test_overhead_user.o
  43
  44 # Tell kbuild to always build the programs
  45 always := $(hostprogs-y)
  46 always += sockex1_kern.o
  47 always += sockex2_kern.o
  48 always += sockex3_kern.o
  49 always += tracex1_kern.o
  50 always += tracex2_kern.o
  51 always += tracex3_kern.o
  52 always += tracex4_kern.o
  53 always += tracex5_kern.o
  54 always += tracex6_kern.o
  55 always += trace_output_kern.o
  56 always += tcbpf1_kern.o
  57 always += lathist_kern.o
  58 always += offwaketime_kern.o
  59 always += spintest_kern.o
  60 always += map_perf_test_kern.o
  61 always += test_overhead_tp_kern.o
  62 always += test_overhead_kprobe_kern.o
  63 always += parse_varlen.o parse_simple.o parse_ldabs.o
  64
  65 HOSTCFLAGS += -I$(objtree)/usr/include
  66
  67 HOSTCFLAGS_bpf_load.o += -I$(objtree)/usr/include -Wno-unused-variable
  68 HOSTLOADLIBES_fds_example += -lelf
  69 HOSTLOADLIBES_sockex1 += -lelf
  70 HOSTLOADLIBES_sockex2 += -lelf
  71 HOSTLOADLIBES_sockex3 += -lelf
  72 HOSTLOADLIBES_tracex1 += -lelf
  73 HOSTLOADLIBES_tracex2 += -lelf
  74 HOSTLOADLIBES_tracex3 += -lelf
  75 HOSTLOADLIBES_tracex4 += -lelf -lrt
  76 HOSTLOADLIBES_tracex5 += -lelf
  77 HOSTLOADLIBES_tracex6 += -lelf
  78 HOSTLOADLIBES_trace_output += -lelf -lrt
  79 HOSTLOADLIBES_lathist += -lelf
  80 HOSTLOADLIBES_offwaketime += -lelf
  81 HOSTLOADLIBES_spintest += -lelf
  82 HOSTLOADLIBES_map_perf_test += -lelf -lrt
  83 HOSTLOADLIBES_test_overhead += -lelf -lrt
  84
  85 # Allows pointing LLC/CLANG to a LLVM backend with bpf support, redefine on cmdline:
  86 #  make samples/bpf/ LLC=~/git/llvm/build/bin/llc CLANG=~/git/llvm/build/bin/clang
  87 LLC ?= llc
  88 CLANG ?= clang
  89
  90 # Trick to allow make to be run from this directory
  91 all:
  92         $(MAKE) -C ../../ $$PWD/
  93
  94 clean:
  95         $(MAKE) -C ../../ M=$$PWD clean
  96         @rm -f *~
  97
  98 # Verify LLVM compiler tools are available and bpf target is supported by llc
  99 .PHONY: verify_cmds verify_target_bpf $(CLANG) $(LLC)
 100
 101 verify_cmds: $(CLANG) $(LLC)
 102         @for TOOL in $^ ; do \
 103                 if ! (which -- "$${TOOL}" > /dev/null 2>&1); then \
 104                         echo "*** ERROR: Cannot find LLVM tool $${TOOL}" ;\
 105                         exit 1; \
 106                 else true; fi; \
 107         done
 108
 109 verify_target_bpf: verify_cmds
 110         @if ! (${LLC} -march=bpf -mattr=help > /dev/null 2>&1); then \
 111                 echo "*** ERROR: LLVM (${LLC}) does not support 'bpf' target" ;\
 112                 echo "   NOTICE: LLVM version >= 3.7.1 required" ;\
 113                 exit 2; \
 114         else true; fi
 115
 116 $(src)/*.c: verify_target_bpf
 117
 118 # asm/sysreg.h - inline assembly used by it is incompatible with llvm.
 119 # But, there is no easy way to fix it, so just exclude it since it is
 120 # useless for BPF samples.
 121 $(obj)/%.o: $(src)/%.c
 122         $(CLANG) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(EXTRA_CFLAGS) \
 123                 -D__KERNEL__ -D__ASM_SYSREG_H -Wno-unused-value -Wno-pointer-sign \
 124                 -Wno-compare-distinct-pointer-types \
 125                 -O2 -emit-llvm -c $< -o -| $(LLC) -march=bpf -filetype=obj -o $@