package/network/utils/bpftools/patches/001-libbpf-ensure-no-local-symbols-counted-in-ABI-check.patch

   1 From fafb2e7eaec6d33ce16e28f481edf781219d5d27 Mon Sep 17 00:00:00 2001
   2 From: Tony Ambardar <Tony.Ambardar@gmail.com>
   3 Date: Fri, 24 Jul 2020 23:58:17 -0700
   4 Subject: [PATCH] tools/libbpf: ensure no local symbols counted in ABI check
   5
   6 This avoids finding versioned local symbols such as _init and _fini in
   7 the libbpf.so file.
   8
   9 Signed-off-by: Tony Ambardar <Tony.Ambardar@gmail.com>
  10 ---
  11  tools/lib/bpf/Makefile | 2 ++
  12  1 file changed, 2 insertions(+)
  13
  14 --- a/tools/lib/bpf/Makefile
  15 +++ b/tools/lib/bpf/Makefile
  16 @@ -152,6 +152,7 @@ GLOBAL_SYM_COUNT = $(shell readelf -s --
  17                            awk '/GLOBAL/ && /DEFAULT/ && !/UND/ {print $$NF}' | \
  18                            sort -u | wc -l)
  19  VERSIONED_SYM_COUNT = $(shell readelf --dyn-syms --wide $(OUTPUT)libbpf.so | \
  20 +                             awk '/GLOBAL/ && /DEFAULT/ && !/UND/ {print $$NF}' | \
  21                               grep -Eo '[^ ]+@LIBBPF_' | cut -d@ -f1 | sort -u | wc -l)
  22
  23  CMD_TARGETS = $(LIB_TARGET) $(PC_FILE)
  24 @@ -219,6 +220,7 @@ check_abi: $(OUTPUT)libbpf.so
  25                     awk '/GLOBAL/ && /DEFAULT/ && !/UND/ {print $$NF}'|  \
  26                     sort -u > $(OUTPUT)libbpf_global_syms.tmp;           \
  27                 readelf --dyn-syms --wide $(OUTPUT)libbpf.so |           \
  28 +                   awk '/GLOBAL/ && /DEFAULT/ && !/UND/ {print $$NF}'|  \
  29                     grep -Eo '[^ ]+@LIBBPF_' | cut -d@ -f1 |             \
  30                     sort -u > $(OUTPUT)libbpf_versioned_syms.tmp;        \
  31                 diff -u $(OUTPUT)libbpf_global_syms.tmp                  \