Removed vestigial cray_xc platform in favor of combined cray platform

lib/spack/spack/platforms/cray_xc.py

@@ -1,72 +0,0 @@
-import os
-import spack
-from spack.architecture import Platform, Target
-from spack.operating_systems.linux_distro import LinuxDistro
-from spack.operating_systems.cnl import Cnl
-from spack.util.executable import which
-from llnl.util.filesystem import join_path
-
-
-class CrayXc(Platform):
-    priority    = 20
-    front_end   = 'sandybridge'
-    back_end    = 'ivybridge'
-    default     = 'ivybridge'
-
-    back_os     = "CNL10"
-    default_os  = "CNL10"
-
-    def __init__(self):
-        ''' Since cori doesn't have ivybridge as a front end it's better
-            if we use CRAY_CPU_TARGET as the default. This will ensure
-            that if we're on a XC-40 or XC-30 then we can detect the target
-        '''
-        super(CrayXc, self).__init__('cray_xc')
-
-        # Handle the default here so we can check for a key error
-        if 'CRAY_CPU_TARGET' in os.environ:
-            self.default = os.environ['CRAY_CPU_TARGET']
-
-        # Change the defaults to haswell if we're on an XC40
-        if self.default == 'haswell':
-            self.front_end = self.default
-            self.back_end = self.default
-
-        # Could switch to use modules and fe targets for front end
-        # Currently using compilers by path for front end.
-        self.add_target('sandybridge', Target('sandybridge'))
-        self.add_target('ivybridge',
-                        Target('ivybridge', 'craype-ivybridge'))
-        self.add_target('haswell',
-                        Target('haswell', 'craype-haswell'))
-
-        # Front end of the cray platform is a linux distro.
-        linux_dist = LinuxDistro()
-        self.front_os = str(linux_dist)
-        self.add_operating_system(str(linux_dist), linux_dist)
-        self.add_operating_system('CNL10', Cnl())
-
-    @classmethod
-    def setup_platform_environment(self, pkg, env):
-        """ Change the linker to default dynamic to be more
-            similar to linux/standard linker behavior
-        """
-        env.set('CRAYPE_LINK_TYPE', 'dynamic')
-        cray_wrapper_names = join_path(spack.build_env_path, 'cray')
-        if os.path.isdir(cray_wrapper_names):
-            env.prepend_path('PATH', cray_wrapper_names)
-            env.prepend_path('SPACK_ENV_PATHS', cray_wrapper_names)
-
-    @classmethod
-    def detect(self):
-        try:
-            cc_verbose = which('ftn')
-            text = cc_verbose('-craype-verbose',
-                              output=str, error=str,
-                              ignore_errors=True).split()
-            if '-D__CRAYXC' in text:
-                return True
-            else:
-                return False
-        except:
-            return False