"fatal error: openssl/bio.h: No such file or directory" while trying to compile kernel 4.18 or 4.19

[Yannick Schinko]

Hi @burnbabyburn,

I'm sure you'll be able to help me with that.
When I try to compile the kernels 4.18 or 4.19, I get the following error.

  UPD     include/generated/asm-offsets.h
  CALL    scripts/checksyscalls.sh
  LEX     scripts/dtc/dtc-lexer.lex.c
  HOSTCC  scripts/extract-cert
<stdin>:1335:2: warning: #warning syscall rseq not implemented [-Wcpp]
  YACC    scripts/dtc/dtc-parser.tab.h
  YACC    scripts/dtc/dtc-parser.tab.c
scripts/extract-cert.c:21:10: fatal error: openssl/bio.h: No such file or directory
 #include <openssl/bio.h>
          ^~~~~~~~~~~~~~~
compilation terminated.
scripts/Makefile.host:90: recipe for target 'scripts/extract-cert' failed
make[1]: *** [scripts/extract-cert] Error 1
make[1]: *** Waiting for unfinished jobs....

What am I missing to compile that?
I'd be guessing libssl-dev. But I'm not sure whether it's missing on the build system or the image.

[burnbabyburn]

It's missing on the build system. It's an error while crosscompiling so it is not running in chroot.
I'll add it to readme.me

[Yannick Schinko]

Ok. Will restart the CI build as soon as ftp.de.debian is back up. 😂

[burnbabyburn]

Another reason using apt-cacher-ng
I didn't notice that until your post 😂

[Yannick Schinko]

Do you have that on the build host?
Because on the Pi that won't help much when trying to make an image 😂

[burnbabyburn]

Compiling on Pi takes like what 1-2days?

So i am using a 'lil vbox getting the job done. With apt-cacher-ng and 2 cpu-cores (on my six year old i5 main maschine) it takes 30-60min for one image i think.
I did consider TravisCI but it felt like abuse.

[Yannick Schinko]

Ah ok. So I'll throw that on my build host then. Would I have to configure anything or will it just work out of the box?

[burnbabyburn]

I downloaded virtualbox for windows, debian testing netinstall, installed all mentioned packages in build-dependencies, than pulled all used repositorys to my maschine

drop in your existing configuration after that and your good to go.

• apt-cacher-ng is caching your *.deb files.
• git mirrors are local
• Adding KERNEL_CCACHE speeds up kernel compilation!

Building your chroot doesn't require any download and is basically just debootstrap,install & unpack packages, build kernel and copy to img-file.

[Yannick Schinko]

That fixed it.