Embed source instead of linking

Rakefile

@@ -20,7 +20,15 @@ end
 
 task :vendor do
   version = "1.0.3"
-  sh "cd vendor && curl -L https://github.com/maxmind/libmaxminddb/releases/download/#{version}/libmaxminddb-#{version}.tar.gz | tar xz"
+  mkdir_p "tmp/"
+  dir = "tmp/libmaxminddb-#{version}"
+  cd "tmp/" do
+    sh "curl -L https://github.com/maxmind/libmaxminddb/releases/download/#{version}/libmaxminddb-#{version}.tar.gz | tar xz"
+  end
+  cp "#{dir}/src/maxminddb-compat-util.h", "ext/geoip2_compat/maxminddb-compat-util.h"
+  cp "#{dir}/src/maxminddb.c", "ext/geoip2_compat/maxminddb.c"
+  cp "#{dir}/include/maxminddb.h", "ext/geoip2_compat/maxminddb.h"
+  cp "#{dir}/include/maxminddb_config.h.in", "ext/geoip2_compat/maxminddb_config.h"
 end
 
 task default: [:compile, :download, :test]

ext/geoip2_compat/extconf.rb

@@ -6,19 +6,6 @@
 
 RbConfig::MAKEFILE_CONFIG['CC'] = ENV['CC'] if ENV['CC']
 
-ROOT = File.expand_path("../../..", __FILE__)
+$defs << ' -DPACKAGE_VERSION=\"1.0.3\"'
 
-Dir.chdir("#{ROOT}/vendor/libmaxminddb-1.0.3") do
-  system "./configure", "--prefix", "#{ROOT}/ext/libmaxminddb"
-  system "make", "install"
-end
-
-$INCFLAGS << " -I#{ROOT}/ext/libmaxminddb/include "
-$LDFLAGS  << " -L#{ROOT}/ext/libmaxminddb/lib "
-
-if have_header('maxminddb.h') && have_library('maxminddb')
-  create_makefile("#{extension_name}/#{extension_name}")
-else
-  puts "Couldn't find libmaxminddb"
-  exit(1)
-end
+create_makefile("#{extension_name}/#{extension_name}")