General information_
A build-bindgen.sh script is provided to help builders compile a copy of the bindgen binary that's now required to compile ungoogled chromium.
Bindgen is linked with libclang libraries and needs to be be built by the same clang toolchain that will be used to build ungoogled chromium.
With system packaged bindgen, I assume that (on unstable) it's built with the default clang release, which is clang 16. So sticking with the system package restricts one to an older version of clang, at least on debian unstable.
Those wanting to use a newer system clang, say version 18 or even 19, will need to run build-bindgen.sh. Those wanting to use bundled or self-compiled clang will need to do the same.
Script requirements
Make sure you have copies of the following installed :-
cargo curl rustc unzip
(Note: use the rustc-web package on stable instead of rustc)
System bindgen package
apt-get install bindgen
Configure with ... SYS_BINDGEN=1 SYS_CLANG=1 ./debian/configure.sh
Upstream bindgen
Run the script with the same SYS_CLANG and SYS_RUST values that you intend to use for the configuration script. Valid examples are given below.
In-tree clang :-
SYS_CLANG=0 SYS_RUST=0 ./build-bindgen.sh
System clang package (using clang 19) :-
CLANG_VER=19 SYS_CLANG=1 SYS_RUST=1 ./build-bindgen.sh
CLANG_VER=19 SYS_CLANG=1 SYS_RUST=2 ./build-bindgen.sh
Self-build clang (in /usr/local) :-
SYS_CLANG=2 SYS_RUST=1 ./build-bindgen.sh
SYS_CLANG=2 SYS_RUST=2 ./build-bindgen.sh
Rules of thumb :-
SYS_CLANG=1 requires CLANG_VER to also be set. SYS_CLANG=0 requires SYS_RUST=0 (and vice versa).
The SYS_BINDGEN variable in configure.sh takes the following values :-
1 - Use bindgen from the system package 2 - Use self-compiled bindgen installed in /usr/local
Some valid examples follow for different values of SYS_CLANG :-
In-tree clang :-
... SYS_BINDGEN=2 SYS_CLANG=0 ./debian/configure.sh
System clang package :-
... SYS_BINDGEN=1 SYS_CLANG=1 ./debian/configure.sh
... SYS_BINDGEN=2 SYS_CLANG=1 ./debian/configure.sh
Self-build clang (in /usr/local) :-
... SYS_BINDGEN=2 SYS_CLANG=2 ./debian/configure.sh
Some rules of thumb :-
SYS_BINDGEN=1 is only compatible with SYS_CLANG=1 SYS_BINDGEN=2 is compatible with all values of SYS_CLANG
Cleaning bindgen build files
The script can delete the .download_cache folder (which contains ncursesw-linux-amd64.zip) and the extracted ncursesw folder when the 'c' (or 'clean') positional argument is supplied :-
./build-bindgen.sh c