libxml++ 2.38.0

version bump
audit --strict compliance

Closes Homebrew/homebrew#39578.

Signed-off-by: Xu Cheng <xucheng@me.com>

Formula/libxml++.rb

@@ -1,9 +1,7 @@
-require "formula"
-
 class Libxmlxx < Formula
   homepage "http://libxmlplusplus.sourceforge.net"
-  url "http://ftp.gnome.org/pub/GNOME/sources/libxml++/2.36/libxml++-2.36.0.tar.xz"
-  sha256 "bfdf327bf9ebd12946b7aa6a152045f209d5c9fecd06ebfcdf9b3e7c1af6e2e1"
+  url "http://ftp.gnome.org/pub/GNOME/sources/libxml++/2.38/libxml++-2.38.0.tar.xz"
+  sha256 "5698b03f5d320fb8310e30780e328f03debca12c557434ee031aea9baf3b1346"
 
   bottle do
     revision 1
@@ -18,6 +16,50 @@ class Libxmlxx < Formula
 
   def install
     system "./configure", "--disable-dependency-tracking", "--prefix=#{prefix}"
-    system "make install"
+    system "make", "install"
+  end
+  test do
+    (testpath/"test.cpp").write <<-EOS.undent
+      #include <libxml++/libxml++.h>
+
+      int main(int argc, char *argv[])
+      {
+         xmlpp::Document document;
+         document.set_internal_subset("homebrew", "", "http://www.brew.sh/xml/test.dtd");
+         xmlpp::Element *rootnode = document.create_root_node("homebrew");
+         return 0;
+      }
+    EOS
+    ENV.libxml2
+    gettext = Formula["gettext"]
+    glib = Formula["glib"]
+    glibmm = Formula["glibmm"]
+    libsigcxx = Formula["libsigc++"]
+    flags = ENV["CPPFLAGS"].split + ENV["LDFLAGS"].split
+    flags += %W[
+      -I#{gettext.opt_include}
+      -I#{glib.opt_include}/glib-2.0
+      -I#{glib.opt_lib}/glib-2.0/include
+      -I#{glibmm.opt_include}/glibmm-2.4
+      -I#{glibmm.opt_lib}/glibmm-2.4/include
+      -I#{include}/libxml++-2.6
+      -I#{libsigcxx.opt_include}/sigc++-2.0
+      -I#{libsigcxx.opt_lib}/sigc++-2.0/include
+      -I#{lib}/libxml++-2.6/include
+      -L#{gettext.opt_lib}
+      -L#{glib.opt_lib}
+      -L#{glibmm.opt_lib}
+      -L#{libsigcxx.opt_lib}
+      -L#{lib}
+      -lglib-2.0
+      -lglibmm-2.4
+      -lgobject-2.0
+      -lintl
+      -lsigc-2.0
+      -lxml++-2.6
+      -lxml2
+    ]
+    system ENV.cxx, "test.cpp", "-o", "test", *flags
+    system "./test"
   end
 end