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57 lines
2.4 KiB
Diff
57 lines
2.4 KiB
Diff
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From afe3f4c765b17ced23811fe652c7f7adf7a0c0cf Mon Sep 17 00:00:00 2001
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From: Tony Ambardar <Tony.Ambardar@gmail.com>
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Date: Mon, 14 Sep 2020 23:05:26 -0700
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Subject: [PATCH] tools/arch/powerpc: fix EDEADLOCK redefinition errors in
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errno.h
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A few archs like powerpc have different errno.h values for macros
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EDEADLOCK and EDEADLK. In code including both libc and linux versions of
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errno.h, this can result in multiple definitions of EDEADLOCK in the
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include chain. Definitions to the same value (e.g. seen with mips) do
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not raise warnings, but on powerpc there are redefinitions changing the
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value, which raise warnings and errors (with "-Werror").
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Guard against these redefinitions to avoid build errors like the following,
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first seen cross-compiling libbpf v5.8.9 for powerpc using GCC 8.4.0 with
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musl 1.1.24:
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In file included from ../../arch/powerpc/include/uapi/asm/errno.h:5,
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from ../../include/linux/err.h:8,
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from libbpf.c:29:
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../../include/uapi/asm-generic/errno.h:40: error: "EDEADLOCK" redefined [-Werror]
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#define EDEADLOCK EDEADLK
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In file included from toolchain-powerpc_8540_gcc-8.4.0_musl/include/errno.h:10,
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from libbpf.c:26:
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toolchain-powerpc_8540_gcc-8.4.0_musl/include/bits/errno.h:58: note: this is the location of the previous definition
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#define EDEADLOCK 58
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cc1: all warnings being treated as errors
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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
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Fixes: 95f28190aa01 ("tools include arch: Grab a copy of errno.h for arch's
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supported by perf")
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Fixes: c3617f72036c ("UAPI: (Scripted) Disintegrate arch/powerpc/include/asm")
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Reported-by: Rosen Penev <rosenp@gmail.com>
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Signed-off-by: Tony Ambardar <Tony.Ambardar@gmail.com>
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---
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tools/arch/powerpc/include/uapi/asm/errno.h | 1 +
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1 file changed, 1 insertion(+)
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diff --git a/tools/arch/powerpc/include/uapi/asm/errno.h b/tools/arch/powerpc/include/uapi/asm/errno.h
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index cc79856896a1..4ba87de32be0 100644
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--- a/tools/arch/powerpc/include/uapi/asm/errno.h
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+++ b/tools/arch/powerpc/include/uapi/asm/errno.h
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@@ -2,6 +2,7 @@
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#ifndef _ASM_POWERPC_ERRNO_H
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#define _ASM_POWERPC_ERRNO_H
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+#undef EDEADLOCK
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#include <asm-generic/errno.h>
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#undef EDEADLOCK
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--
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2.25.1
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