Error Linking against C Linenoise: error: expected type '[*c]u8', found '*const [4:0]u8'

[weak ice]

I'm importing Linenoise (https://github.com/antirez/linenoise, located locally at deps/linenoise)
Here are the relevant portions of my code:

// build.zig
exe.addIncludePath(b.path("deps"));

// src/main.zig
const Linenoise = @cImport({
    @cInclude("linenoise/linenoise.c");
});

pub fn main() !void {
  _ = Linenoise.linenoise("prompt>");
}

When I execute zig build I get the following error:

$ zig build
/myprojectpathhere/.zig-cache/o/41e200993f7f9ddf9a76c95c36ecdb26/cimport.zig:1741:5: error: expected type '[*c]u8', found '*const [4:0]u8'
    "dumb",
    ^~~~~~

The relevant piece of code in the generated cimport.zig:

pub var unsupported_term: [4][*c]u8 = [4][*c]u8{
    "dumb",
    "cons25",
    "emacs",
    null,
};

What am I doing wrong, or is this a bug in Zig?

[grizzled willow]

It expects it to be a mutable string for whatever reason
And string literals always point to constant memory

If you think thats a mistake and the library author just forgot to mark it as const, you can just @constCast it

[weak ice]

But I shouldn't edit cimport.zig since it's generated, right?

[grizzled willow]

You can edit it and save it locally
Since youre vendoring it, it should be fine

You could also just edit the header files themselves since youre vendoring it

making it const is exclusively more permissive
So it shouldnt break any code

[weak ice]

Thanks! I've added const in linenoise.c (diff below) and compilation got past that error 🙌.

- static char *unsupported_term[] = {"dumb","cons25","emacs",NULL};
+ static const char *unsupported_term[] = {"dumb","cons25","emacs",NULL};

However, now I'm geting the below error:

install
└─ install myproject
   └─ zig build-exe pur Debug native 3 errors
error: ld.lld: undefined symbol: linenoiseEditMore
    note: referenced by cimport.zig:2379 (/myprojectpathhere/.zig-cache/o/6f2df6dd14cabaa92e3e85c240ac77d9/cimport.zig:2379)
    note:               /myprojectpathhere/.zig-cache/o/1a2ec50a8fe4fbffc0449a148326cc2c/myproject.o:(cimport.linenoiseBlockingEdit)
    note: referenced by cimport.zig:139 (/myprojectpathhere/.zig-cache/o/6f2df6dd14cabaa92e3e85c240ac77d9/cimport.zig:139)
    note:               /myprojectpathhere/.zig-cache/o/1a2ec50a8fe4fbffc0449a148326cc2c/myproject.o:(linenoiseEditFeed)
    note: referenced by cimport.zig:320 (/myprojectpathhere/.zig-cache/o/6f2df6dd14cabaa92e3e85c240ac77d9/cimport.zig:320)
    note:               /myprojectpathhere/.zig-cache/o/1a2ec50a8fe4fbffc0449a148326cc2c/myproject.o:(linenoiseEditFeed)
    note: referenced 1 more times
error: ld.lld: undefined symbol: enableRawMode
    note: referenced by cimport.zig:111 (/myprojectpathhere/.zig-cache/o/6f2df6dd14cabaa92e3e85c240ac77d9/cimport.zig:111)
    note:               /myprojectpathhere/.zig-cache/o/1a2ec50a8fe4fbffc0449a148326cc2c/myproject.o:(linenoiseEditStart)
    note: referenced by cimport.zig:587 (/myprojectpathhere/.zig-cache/o/6f2df6dd14cabaa92e3e85c240ac77d9/cimport.zig:587)
    note:               /myprojectpathhere/.zig-cache/o/1a2ec50a8fe4fbffc0449a148326cc2c/myproject.o:(linenoisePrintKeyCodes)
error: ld.lld: undefined symbol: getColumns
    note: referenced by cimport.zig:112 (/myprojectpathhere/.zig-cache/o/6f2df6dd14cabaa92e3e85c240ac77d9/cimport.zig:112)
    note:               /myprojectpathhere/.zig-cache/o/1a2ec50a8fe4fbffc0449a148326cc2c/myproject.o:(linenoiseEditStart)

Any ideas?

[grizzled willow]

Are you sure youre actually linking against the library

Not just cimporting the header