Merge pull request brianc#334 from aleyush/check_pg_config

Check pg_config existance

Author: brianc

binding.gyp

@@ -2,23 +2,34 @@
   'targets': [
     {
       'target_name': 'binding',
-      'sources': [
-        'src/binding.cc'
-      ],
       'conditions' : [
         ['OS=="win"', {
-          'include_dirs': ['<!@(pg_config --includedir)'],
-          'libraries' : ['libpq.lib'],
-          'msvs_settings': {
-            'VCLinkerTool' : {
-              'AdditionalLibraryDirectories' : [
-                '<!@(pg_config --libdir)\\'
-              ]
-            },
-          }
+          'conditions' : [
+            ['"<!@(cmd /C where /Q pg_config || echo n)"!="n"',
+              {
+                'sources': ['src/binding.cc'],
+                'include_dirs': ['<!@(pg_config --includedir)'],
+                'libraries' : ['libpq.lib'],
+                'msvs_settings': {
+                  'VCLinkerTool' : {
+                    'AdditionalLibraryDirectories' : [
+                      '<!@(pg_config --libdir)\\'
+                    ]
+                  },
+                }
+              }
+            ]
+          ]
         }, { # OS!="win"
-          'include_dirs': ['<!@(pg_config --includedir)'],
-          'libraries' : ['-lpq -L<!@(pg_config --libdir)']
+          'conditions' : [
+            ['"y"!="n"', # ToDo: add pg_config existance condition that works on linux
+              {
+                'sources': ['src/binding.cc'],
+                'include_dirs': ['<!@(pg_config --includedir)'],
+                'libraries' : ['-lpq -L<!@(pg_config --libdir)']
+              }
+            ]
+          ]
         }]
       ]
     }