compile error about ply

[TinyWindzz]

with command:
./autogen.sh
./configure --host=aarch64-linux-gnu
make

[wkz]

Honest question: Are you happy with how you've formatted that output?

I'm over here providing free support and you can't be bothered to paste the log in a way that is at least somewhat readable. Normally I would paste it in my editor, fix the formatting, and try to give you some help. Unfortunately for you, you caught me on a bad day; sorry. Fix the formatting and I'll take a look at it.

[jgsun]

error: 'BPF_JSLE' undeclared
It seems that the kernel header version don't meet the ply.

@wkz Which version of ply support kernel version 4.9?

[TinyWindzz]

My compilation environment is ubuntu x64(linux-4.4), and I'd like to cross compile ply for linux-5.4 arm64.
Any ideas or suggestions?

Thx

[wkz]

BPF_JSLE has been in the kernel since 4.14, so if you're building against 5.4 you should have no problems. The fact that you do have problems indicate one of the following:

• Something in your build environment is causing the compiler to use the host's headers.
• Your toolchain is built against headers that are older than 4.14
• Your toolchain is unable to find your 5.4 kernel's headers.

Have you installed your target's kernel headers somewhere in your toolchain's path? I.e. have you executed make headers_install from your kernel?

[TinyWindzz]

I made the following modification, and finally compiled it successfully.

make headers_install ARCH=arm64 INSTALL_HDR_PATH=/home/frank/project/kernel_head
CFLAGS="-I /home/frank/project/kernel_head/include" ./configure --host=aarch64-linux-gnu --

BR/frank