From: Yi Li <lovelylich@gmail.com>
To: dev@dpdk.org
Subject: compile failed with t3.c
Date: Thu, 17 Nov 2022 14:57:11 +0800 [thread overview]
Message-ID: <CAAA3+BqdjNLasSD+JnftmzR9JE0PSvpzDX6owXk6tUk8GOPxGA@mail.gmail.com> (raw)
Hi list,
When i try to compile examples/bpf/t3.c with command annotated in
that source file, got this error:
[root@server bpf]# clang -O2 -U __GNUC__ -target bpf
-Wno-int-to-void-pointer-cast -c t3.c
In file included from t3.c:27:
In file included from /usr/local/include/rte_mbuf_core.h:22:
/usr/local/include/rte_byteorder.h:30:16: error: invalid output
constraint '=Q' in asm
: [x1] "=Q" (x)
^
1 error generated.
[root@server bpf]#
I think this should be the root cause as noted linux kernel
Documentation/bpf/bpf_devel_QA.txt
BPF programs may recursively include header file(s) with file scope
inline assembly codes. The default target can handle this well, while
bpf target may fail if bpf backend assembler does not understand these
assembly codes, which is true in most cases.
reply other threads:[~2022-11-17 6:57 UTC|newest]
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