1 files changed, 28 insertions, 7 deletions
diff --git a/ext/openbabel/extconf.rb b/ext/openbabel/extconf.rb
index 4b6189c..98150ea 100644
--- a/ext/openbabel/extconf.rb
+++ b/ext/openbabel/extconf.rb
@@ -4,22 +4,43 @@ require 'tmpdir'
 ob_num_ver="2.3.1"
 ob_ver="openbabel-"+ob_num_ver
 
-main_dir = Dir.mktmpdir
-ob_main_dir=main_dir+"/"+ob_ver
-ob_bindings_dir=ob_main_dir+"/scripts/ruby"
+main_dir = File.expand_path(File.join(File.dirname(__FILE__),"..","..","src"))
+lib_dir = File.expand_path(File.join(File.dirname(__FILE__),"..","..","src"))
+Dir.mkdir main_dir
+ob_main_dir = File.join(main_dir,ob_ver)
+ob_bindings_dir = File.join(ob_main_dir,"scripts","ruby")
 
 begin
   Dir.chdir main_dir do
     FileUtils.rm_rf ob_main_dir
-    `curl -L -d use_mirror=netcologne "http://downloads.sourceforge.net/project/openbabel/openbabel/#{ob_num_ver}/openbabel-#{ob_num_ver}.tar.gz" | tar xz`
+    puts "Downloading OpenBabel sources"
+    puts `curl -L -d use_mirror=netcologne "http://downloads.sourceforge.net/project/openbabel/openbabel/#{ob_num_ver}/openbabel-#{ob_num_ver}.tar.gz" | tar xz`
   end
   Dir.chdir ob_main_dir do
-    `cmake #{ob_main_dir}`
+    puts "Configuring OpenBabel"
+    puts `cmake #{ob_main_dir} -DCMAKE_INSTALL_PREFIX=#{lib_dir}`
+    openbabel_libs = false
+    openbabel_libs = true if `/sbin/ldconfig -p`.split("\n").grep(/openbabel/)
+    unless openbabel_libs
+      ENV["LD_LIBRARY_PATH"].split(":").each do |dir|
+        openbabel_libs = true unless Dir[File.join(dir,"*libopenbabel*")].empty?
+      end
+    end
+    unless openbabel_libs
+      puts "OpenBabel not installed. Compiling sources."
+      puts `make`
+      puts `make install`
+    end
   end
   Dir.chdir ob_bindings_dir do
+    puts "Compiling and instaling OpenBabel Ruby bindings."
     `sed -i 's/Init_OpenBabel/Init_openbabel/g' *cpp`
-    require './extconf.rb'
-    `make`
+    # get include and lib from pkg-config
+    ob_include=`pkg-config openbabel-2.0 --cflags-only-I`.sub(/\s+/,'').sub(/-I/,'')
+    ob_lib=`pkg-config openbabel-2.0 --libs-only-L`.sub(/\s+/,'').sub(/-L/,'')
+    `ruby extconf.rb --with-openbabel-include=#{ob_include} --with-openbabel-lib=#{ob_lib}`
+    `sed -i 's/-flat_namespace//' Makefile`
+    puts `make`
   end
   FileUtils.cp(ob_bindings_dir+"/openbabel.so", "./")
 ensure