updated extension.cpp and updated AMBuildScript to actually work

AMBuildScript

@@ -158,7 +158,7 @@ class ExtensionConfig(object):
       '-fvisibility=hidden',
     ]
     cxx.cxxflags += [
-      '-std=c++11',
+      '-std=c++14',
       '-fno-exceptions',
       '-fno-threadsafe-statics',
       '-Wno-non-virtual-dtor',
@@ -243,9 +243,9 @@ class ExtensionConfig(object):
     cxx.defines += ['_LINUX', 'POSIX']
     cxx.linkflags += ['-Wl,--exclude-libs,ALL', '-lm']
     if cxx.vendor == 'gcc':
-      cxx.linkflags += ['-static-libgcc']
+      cxx.linkflags += ['-static-libstdc++']
     elif cxx.vendor == 'clang':
-      cxx.linkflags += ['-lgcc_eh']
+      cxx.linkflags += ['-static-libstdc++']
 
   def configure_mac(self, cxx):
     cxx.defines += ['OSX', '_OSX', 'POSIX']