superlu_dist: fix build with xl compilers (#13702)

* superlu_dist: fix build with xl compilers

* fix link error  ../SRC/libsuperlu_dist.so.6.1.1: undefined reference to `ztrtri_'

* Fixed the ordering of the spec on the xl-611 patch.

* fix flake8 error

var/spack/repos/builtin/packages/superlu-dist/package.py

@@ -40,6 +40,9 @@ class SuperluDist(CMakePackage):
     depends_on('parmetis')
     depends_on('metis@5:')
 
+    patch('xl-611.patch', when='@:6.1.1 %xl')
+    patch('xl-611.patch', when='@:6.1.1 %xl_r')
+
     def cmake_args(self):
         spec = self.spec
         args = [
@@ -54,6 +57,10 @@ def cmake_args(self):
             '-DTPL_PARMETIS_INCLUDE_DIRS=%s' % spec['parmetis'].prefix.include
         ]
 
+        if (spec.satisfies('%xl') or spec.satisfies('%xl_r')) and \
+           spec.satisfies('@:6.1.1'):
+            args.append('-DCMAKE_C_FLAGS=-DNoChange')
+
         if '+int64' in spec:
             args.append('-DXSDK_INDEX_SIZE=64')
         else:

var/spack/repos/builtin/packages/superlu-dist/xl-611.patch

@@ -0,0 +1,26 @@
+commit e51132dbd022139933678b3a751a9b3148fafd19
+Author: Satish Balay <balay@mcs.anl.gov>
+Date:   Tue Nov 12 16:07:08 2019 -0600
+
+    add ztrtri_ mapping for xlf
+
+diff --git a/SRC/Cnames.h b/SRC/Cnames.h
+index 792f514..ebef619 100644
+--- a/SRC/Cnames.h
++++ b/SRC/Cnames.h
+@@ -179,6 +179,7 @@ at the top-level directory.
+ #define zher2_    ZHER2
+ #define zgeru_    ZGERU
+ 
++#define ztrtri_   ZTRTRI
+ /*
+ #define mc64id_dist     MC64ID_DIST
+ #define mc64ad_dist     MC64AD_DIST
+@@ -307,6 +308,7 @@ at the top-level directory.
+ #define zher2_    zher2
+ #define zgeru_    zgeru
+ 
++#define ztrtri_   ztrtri
+ /*
+ #define mc64id_dist         mc64id_dist
+ #define mc64ad_dist         mc64ad_dist