feat: made unix-loader more stable on FreeBSD

unix-loader/build.zig

@@ -1,7 +1,14 @@
 const std = @import("std");
 
 pub fn build(b: *std.Build) !void {
+    var arena = std.heap.ArenaAllocator.init(std.heap.page_allocator);
+    defer arena.deinit();
+    const alloc = arena.allocator();
+
     const beacon = b.option([]const u8, "beacon", "path to beacon to load") orelse std.debug.panic("Expected a path to a beacon to be provided with -Dbeacon", .{});
+    const target_os = b.option([]const u8, "os", "os name to inject in final binary") orelse "linux";
+    const fork = b.option(bool, "fork", "whether to fork or take over the process") orelse false;
+
     const beacon_path = std.Build.LazyPath{ .cwd_relative = beacon };
 
     const target = b.standardTargetOptions(.{});
@@ -26,14 +33,21 @@ pub fn build(b: *std.Build) !void {
         .pic = true,
     });
 
+    const options = b.addOptions();
+    options.addOption(bool, "fork", fork);
+
     libloader.addIncludePath(b.path("src"));
     libloader.root_module.addAnonymousImport("beacon", .{ .root_source_file = compressed_beacon });
-    libloader.linkLibC();
+    libloader.root_module.addOptions("config", options);
+
+    if (target.result.os.tag == .freebsd) {
+        libloader.linkLibC();
+    }
 
     libloader.step.dependOn(&tool_step.step);
 
     var lib = b.addSharedLibrary(.{
-        .name = "unix-loader",
+        .name = try std.fmt.allocPrint(alloc, "unix-loader-{s}", .{target_os}),
         .root_source_file = b.path("src/loader.zig"),
         .target = target,
         .optimize = optimize,
@@ -44,8 +58,6 @@ pub fn build(b: *std.Build) !void {
         .name = "test-loader",
         .root_source_file = b.path("src/test_run.zig"),
         .target = target,
-        .optimize = optimize,
-        .strip = true,
     });
 
     lib.addIncludePath(b.path("src"));