Issues statically linking IUP

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1

I am attempting to statically link to the IUP UI library, using their provided MinGW binaries. I’ve been able to figure it out except for 3 linker errors. Which seem to be compiler implementation specific? I’ve had trouble digging up information on this. Any help would be greatly appreciated.

error: lld-link: undefined symbol: __declspec(dllimport) __argc
    note: referenced by libiup.a(iupwindows_main.o):(.refptr.__imp___argc)
error: lld-link: undefined symbol: __declspec(dllimport) __argv
    note: referenced by libiup.a(iupwindows_main.o):(.refptr.__imp___argv)
error: lld-link: undefined symbol: _setjmp
    note: referenced by libiup.a(iup_maskparse.o):(iupMaskParse)

And these are the libs I’m linking:

  • libc
  • iup
  • gdi32
  • comdlg32
  • comctl32
  • ole32
2

Hey @SDay, welcome to the forum!

Do you have a build.zig file that you’re working with or a script/command that you can share with us? I think some more information would be helpful!

3

Of course, thank you. I’m just using a build script. No custom args for zig build or anything.

const std = @import("std");
const Build = std.Build;

pub fn build(b: *Build) void {
    const target = b.standardTargetOptions(.{});
    const optimize = b.standardOptimizeOption(.{});

    const exe = b.addExecutable(.{
        .name = "Data Chronologer",
        .root_source_file = .{ .path = "src/main.zig" },
        .target = target,
        .optimize = optimize,
    });
    exe.linkLibC();
    exe.addIncludePath(.{ .path = "include/iup" });
    exe.addLibraryPath(.{ .path = "lib/iup" });
    const libs = [_][]const u8{
        "iup",
        "gdi32",
        "comdlg32",
        "comctl32",
        "ole32",
    };
    for (libs) |lib| {
        exe.linkSystemLibrary(lib);
    }

    b.installArtifact(exe);
    const run_cmd = b.addRunArtifact(exe);
    run_cmd.step.dependOn(b.getInstallStep());
    if (b.args) |args| {
        run_cmd.addArgs(args);
    }
    const run_step = b.step("run", "Run the app");
    run_step.dependOn(&run_cmd.step);

    const exe_unit_tests = b.addTest(.{
        .root_source_file = .{ .path = "src/main.zig" },
        .target = target,
        .optimize = optimize,
    });

    const run_exe_unit_tests = b.addRunArtifact(exe_unit_tests);
    const test_step = b.step("test", "Run unit tests");
    test_step.dependOn(&run_exe_unit_tests.step);
}
4

I hit the same error yesterday while trying to link a static library that was built with an older zig version.
I’m guessing this was caused by a recent update of of mingw64 in the zig compiler Update mingw-w64 to latest git commit by andrewrk · Pull Request #16109 · ziglang/zig · GitHub
I could solve this by rebuilding the static library with the same zig version. But that would be pretty complicated in your case, I guess.

So I’d suggest that you report this problem on github and either use an older zig version or dynamically link the library until the issue is fixed.

5

Thank you for this insight. Will try reporting this soon and see if there’s a workaround for linking to older builds from MinGW. But I’ll just do dynamic linking for now. Much appreciated!