I compile gdbserver for RISCV on gdb10.1 version, and there is a error

[Jim Wilson]

On Fri, Nov 13, 2020 at 5:13 AM Simon Marchi <simark@simark.ca> wrote:

> On 2020-11-12 9:43 p.m., hilihui@sina.com wrote:
> > ../../gdbserver/linux-riscv-low.cc:170:42: error: invalid application of
> 'sizeof' to incomplete type '__riscv_mc_q_ext_state'     sizeof (struct
> __riscv_mc_q_ext_state), OPTIONAL_REGS,
>       ^It seems that  "__riscv_mc_q_ext_state" is not defined. How to
> resolve this question? Thanks!
> >
>
> In glibc, this type is provided here:
>
>
> https://sourceware.org/git/?p=glibc.git;a=blob;f=sysdeps/unix/sysv/linux/riscv/sys/ucontext.h;h=a4e49fe37a1397fa1babeb0dcefb77341f1e7ad1;hb=HEAD#l65
>
> And it appears to have been there since the beginning of the RISC-V
> support.
>

Since the beginning of upstream support, yes.  But it was an academic
project for years before it was upstreamed and some people are stuck with
old stuff because they forked a while back and never upgraded.  Or maybe
haven't upgraded yet.  The ETH Zurich pulp project for instance.

> What libc is your system using?
>

He sent me private mail too.  I suspect he is missing the linux kernel
RISC-V specific ptrace support also.  That came after the glibc support.

Jim