Fixes needed to build gcc on Linux/ppc64le (#2057)

* Fixes needed to build gcc on Linux/ppc64le

* flake8 fix.

var/spack/repos/builtin/packages/gcc/package.py

@@ -66,7 +66,8 @@ def install(self, spec, prefix):
 
         enabled_languages = set(('c', 'c++', 'fortran', 'java', 'objc'))
 
-        if spec.satisfies("@4.7.1:") and sys.platform != 'darwin':
+        if spec.satisfies("@4.7.1:") and sys.platform != 'darwin' and \
+           not (spec.satisfies('@:4.9.3') and 'ppc64le' in spec.architecture):
             enabled_languages.add('go')
 
         # Fix a standard header file for OS X Yosemite that

var/spack/repos/builtin/packages/libsigsegv/package.py

@@ -30,6 +30,8 @@ class Libsigsegv(Package):
     homepage = "https://www.gnu.org/software/libsigsegv/"
     url      = "ftp://ftp.gnu.org/gnu/libsigsegv/libsigsegv-2.10.tar.gz"
 
+    patch('patch.new_config_guess', when='@2.10')
+
     version('2.10', '7f96fb1f65b3b8cbc1582fb7be774f0f')
 
     def install(self, spec, prefix):