Add pango build support and improve configure library detection.

binding.gyp

@@ -2,7 +2,8 @@
   'variables': {
     'GTK_Root%': 'C:/GTK',  # Set the location of GTK all-in-one bundle
     'with_jpeg%': 'false',
-    'with_gif%': 'false'
+    'with_gif%': 'false',
+    'with_pango%': 'false'
   },
   'targets': [
     {
@@ -34,7 +35,18 @@
           'libraries': [
             '-lpixman-1',
             '-lcairo'
+          ]
+        }],
+        ['with_pango=="true"', {
+          'defines': [
+            'HAVE_PANGO'
           ],
+          'include_dirs': [ # tried to pass through cflags but failed
+            '<!@(pkg-config pangocairo --cflags-only-I | sed s/-I//g)'
+          ],
+          'libraries': [
+            '<!@(pkg-config pangocairo --libs)'
+          ]
         }],
         ['with_jpeg=="true"', {
           'defines': [

configure

@@ -12,9 +12,17 @@ cppflags=
 
 has_lib() {
   local lib=$1
+
+  # Try using ldconfig on linux systems
+  for LINE in `which ldconfig > /dev/null && ldconfig -p 2>/dev/null | grep lib$lib`; do
+    return 0
+  done
+
+  # Try just checking common library locations
   for dir in /lib /usr/lib /usr/local/lib /opt/local/lib; do
     test -d $dir && ls $dir | grep $lib && return 0
   done
+
   return 1
 }
 
@@ -41,7 +49,7 @@ has() {
 has_pkg_config() {
   local lib=$1
   check $lib
-  pkg-config --libs cairo > /dev/null
+  pkg-config --libs $1 > /dev/null 2> /dev/null
   if test $? -eq 0; then
     found $lib
   else
@@ -80,6 +88,7 @@ echo
 has gif
 has jpeg
 has_pkg_config cairo
+has_pkg_config pangocairo
 echo
 
 # TODO: output flags and get npm "install" script working