git.openwrt.org Git - openwrt/staging/rmilecki.git/blob

   1 From afe3f4c765b17ced23811fe652c7f7adf7a0c0cf Mon Sep 17 00:00:00 2001
   2 From: Tony Ambardar <Tony.Ambardar@gmail.com>
   3 Date: Mon, 14 Sep 2020 23:05:26 -0700
   4 Subject: [PATCH] tools/arch/powerpc: fix EDEADLOCK redefinition errors in
   5  errno.h
   6
   7 A few archs like powerpc have different errno.h values for macros
   8 EDEADLOCK and EDEADLK. In code including both libc and linux versions of
   9 errno.h, this can result in multiple definitions of EDEADLOCK in the
  10 include chain. Definitions to the same value (e.g. seen with mips) do
  11 not raise warnings, but on powerpc there are redefinitions changing the
  12 value, which raise warnings and errors (with "-Werror").
  13
  14 Guard against these redefinitions to avoid build errors like the following,
  15 first seen cross-compiling libbpf v5.8.9 for powerpc using GCC 8.4.0 with
  16 musl 1.1.24:
  17
  18   In file included from ../../arch/powerpc/include/uapi/asm/errno.h:5,
  19                    from ../../include/linux/err.h:8,
  20                    from libbpf.c:29:
  21   ../../include/uapi/asm-generic/errno.h:40: error: "EDEADLOCK" redefined [-Werror]
  22    #define EDEADLOCK EDEADLK
  23
  24   In file included from toolchain-powerpc_8540_gcc-8.4.0_musl/include/errno.h:10,
  25                    from libbpf.c:26:
  26   toolchain-powerpc_8540_gcc-8.4.0_musl/include/bits/errno.h:58: note: this is the location of the previous definition
  27    #define EDEADLOCK       58
  28
  29   cc1: all warnings being treated as errors
  30   make[5]: *** [target-powerpc_8540_musl/bpftools-5.8.9/tools/build/Makefile.build:97: /home/kodidev/openwrt-project/build_dir/target-powerpc_8540_musl/bpftools-minimal/bpftools-5.8.9//libbpf/staticobjs/libbpf.o] Error 1
  31
  32 Fixes: 95f28190aa01 ("tools include arch: Grab a copy of errno.h for arch's
  33                       supported by perf")
  34 Fixes: c3617f72036c ("UAPI: (Scripted) Disintegrate arch/powerpc/include/asm")
  35
  36 Reported-by: Rosen Penev <rosenp@gmail.com>
  37 Signed-off-by: Tony Ambardar <Tony.Ambardar@gmail.com>
  38 ---
  39  tools/arch/powerpc/include/uapi/asm/errno.h | 1 +
  40  1 file changed, 1 insertion(+)
  41
  42 --- a/tools/arch/powerpc/include/uapi/asm/errno.h
  43 +++ b/tools/arch/powerpc/include/uapi/asm/errno.h
  44 @@ -2,6 +2,7 @@
  45  #ifndef _ASM_POWERPC_ERRNO_H
  46  #define _ASM_POWERPC_ERRNO_H
  47
  48 +#undef EDEADLOCK
  49  #include <asm-generic/errno.h>
  50
  51  #undef EDEADLOCK