Add zlib as a dependency

build.zig

@@ -9,7 +9,9 @@ pub fn build(b: *std.Build) !void {
 
     const upstream = b.dependency("upstream", .{ .target = target, .optimize = optimize });
     const openssl = b.dependency("openssl", .{ .target = target, .optimize = optimize });
+    const zlib_dep = b.dependency("zlib", .{ .target = target, .optimize = optimize });
     const openssllib = openssl.artifact("openssl");
+    const zlib = zlib_dep.artifact("z");
 
     const config_ext = b.addConfigHeader(.{
         .style = .{ .autoconf = upstream.path("src/include/pg_config_ext.h.in") },
@@ -87,6 +89,7 @@ pub fn build(b: *std.Build) !void {
     lib.installConfigHeader(config_ext);
     lib.installConfigHeader(config_os);
     lib.linkLibrary(openssllib);
+    lib.linkLibrary(zlib);
     b.installArtifact(lib);
 
     const portlib = b.addStaticLibrary(.{
@@ -199,6 +202,7 @@ pub fn build(b: *std.Build) !void {
         .flags = &CFLAGS,
     });
     common.linkLibrary(openssllib);
+    common.linkLibrary(zlib);
     b.installArtifact(common);
 
     const test1 = b.addExecutable(.{

build.zig.zon

@@ -10,6 +10,10 @@
             .url = "git+https://github.com/allyourcodebase/openssl?ref=3.3.0#37f44e18975205c8111fec16b896c2f937667465",
             .hash = "12200078346510dd1010ac11cf1d46b0e51cda1b3c80f3b2fb375194f52f70cbf0a0",
         },
+        .zlib = .{
+            .url = "git+https://github.com/allyourcodebase/zlib?ref=1.3.1#0918e87b7629b9c6a50a08edd0ce30d849758faf",
+            .hash = "122034ab2a12adf8016ffa76e48b4be3245ffd305193edba4d83058adbcfa749c107",
+        },
     },
     .paths = .{
         "build.zig",