Modify node_addon configure api

doc/api.txt

@@ -1324,7 +1324,6 @@ def set_options(opt):
 def configure(conf):
   conf.check_tool('compiler_cxx')
   conf.check_tool('node_addon')
-  conf.check_node_headers()
 
 def build(bld):
   obj = bld.new_task_gen('cxx', 'shlib', 'node_addon')

tools/wafadmin/Tools/node_addon.py

@@ -1,14 +1,14 @@
 import os
 import TaskGen, Utils, Utils, Runner, Options, Build
 from TaskGen import extension, taskgen, before, after, feature
-from Configure import conf
+from Configure import conf, conftest
 
 @taskgen
 @before('apply_incpaths', 'apply_lib_vars', 'apply_type_vars')
 @feature('node_addon')
 @before('apply_bundle')
 def init_node_addon(self):
-	self.default_install_path = '${PREFIX}/lib/node/libraries'
+	self.default_install_path = '${PREFIX_NODE}/lib/node/libraries'
 	self.uselib = self.to_list(getattr(self, 'uselib', ''))
 	if not 'NODE' in self.uselib: self.uselib.append('NODE')
 	self.env['MACBUNDLE'] = True
@@ -20,15 +20,19 @@ def init_node_addon(self):
 def node_addon_shlib_ext(self):
 	self.env['shlib_PATTERN'] = "%s.node"
 
-@conf
-def check_node_headers(conf):
+def detect(conf):
   join = os.path.join
-  wafadmin = join(os.path.dirname(__file__), '..')
-  libnode = join(wafadmin, '..')
-  lib = join(libnode, '..')
-  prefix = join(lib, '..')
+  abspath = os.path.abspath
+  wafadmin = abspath(join(os.path.dirname(__file__), '..'))
+  libnode = abspath(join(wafadmin, '..'))
+  lib = abspath(join(libnode, '..'))
+  prefix = abspath(join(lib, '..'))
+
+  conf.env['PREFIX_NODE'] = prefix
   conf.env['LIBPATH_NODE'] = lib
   conf.env['CPPPATH_NODE'] = join(prefix, 'include/node')
   conf.env['CPPFLAGS_NODE'] = '-D_GNU_SOURCE'
   conf.env['CPPFLAGS_NODE'] = '-DEV_MULTIPLICITY=0'
 
+  found = os.path.exists(join(prefix, "bin/node"))
+  conf.check_message('node prefix', '', found, prefix)