how do I add a compile option to my build system? | Zig Programming Language | Page 1

solemn wedge Sep 20, 2023, 9:45 AM

#

Hi, How do I add someting like zig build -DCustomOption in my zig build? this custom option must be also be visible inside the code, I was trying the addOptions function but I'm not getting nowhere...

#

how do I add a compile option to my build system?

full wyvern Sep 20, 2023, 9:53 AM

#

something like this. i haven't tested this code, but adapted it from another project which works.

pub fn build(b: *Builder) !void {
    const exe = ...
    const options = b.addOptions();
    const option = b.option(bool, "name", "description") orelse false;
    options.addOption(bool, "name", option);
    exe.addModule("build_options", options.createModule());
}

#

after this, you can pass this option like

zig build -Dname

#

i think for booleans adding =true is optional

#

and in your code,

const build_options = @import"build_options");
const name = build_options.name:

solemn wedge Sep 20, 2023, 9:55 AM

#

thanks!

full wyvern Sep 20, 2023, 9:56 AM

#

note that you'll have to add the module to any other tests or exe/libs you want to use it in

#

*note

#

and after this, the option will show up in zig build --help

#how do I add a compile option to my build system?