downgrade glibc to 2.19 and update README

test/BUILD

@@ -1,15 +1,26 @@
-cc_binary(
-    name = "hello",
-    srcs = ["hello.cpp"],
+load("@io_bazel_rules_go//go:def.bzl", "go_binary", "go_library")
+
+go_library(
+    name = "go_lib",
+    srcs = ["hello.go"],
+    cgo = True,
+    importpath = "github.com/motiejus/bazel-zig-cc/test",
+    visibility = ["//visibility:private"],
+)
+
+go_binary(
+    name = "gognu",
+    embed = [":go_lib"],
+    visibility = ["//visibility:public"],
+)
+
+go_binary(
+    name = "gomusl",
+    embed = [":go_lib"],
+    static = "on",
     target_compatible_with = select({
         "@platforms//os:linux": ["@com_github_ziglang_zig//:musl"],
         "//conditions:default": [],
     }),
+    visibility = ["//visibility:public"],
 )
-
-cc_binary(
-    name = "exception",
-    srcs = ["exception.cpp"],
-)
-
-# go build -ldflags "-linkmode external -extldflags -static" hello.go