mumps: fixed compilation issues due to scotch not found at link time (#4567)

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

@@ -92,14 +92,9 @@ def write_makefile_inc(self):
         orderings = ['-Dpord']
 
         if '+ptscotch' in self.spec or '+scotch' in self.spec:
-            join_lib = ' -l%s' % ('pt' if '+ptscotch' in self.spec else '')
             makefile_conf.extend([
                 "ISCOTCH = -I%s" % self.spec['scotch'].prefix.include,
-                "LSCOTCH = -L%s %s%s" % (self.spec['scotch'].prefix.lib,
+                "LSCOTCH = {0}".format(self.spec['scotch'].libs.ld_flags)
-                                         join_lib,
-                                         join_lib.join(['esmumps',
-                                                        'scotch',
-                                                        'scotcherr']))
             ])
 
             orderings.append('-Dscotch')

var/spack/repos/builtin/packages/scotch/esmumps-ldflags-6.0.4.patch

@@ -0,0 +1,11 @@
+--- a/src/esmumps/Makefile	2017-06-21 10:53:31.595758201 +0200
++++ b/src/esmumps/Makefile	2017-06-21 10:54:30.811757141 +0200
+@@ -44,7 +44,7 @@
+ 				$(CC) $(CFLAGS) $(CLIBFLAGS) -I$(includedir) -c $(<) -o $(@)
+ 
+ %$(EXE)	:	%.c
+-		 		$(CC) $(CFLAGS) -I$(includedir) $(<) -o $(@) -L$(libdir) $(LDFLAGS) -L. -l$(ESMUMPSLIB) -l$(SCOTCHLIB) -lscotch -l$(SCOTCHLIB)errexit -lm
++		 		$(CC) $(CFLAGS) -I$(includedir) $(<) -o $(@) -L$(libdir) -L. -l$(ESMUMPSLIB) -l$(SCOTCHLIB) -lscotch -l$(SCOTCHLIB)errexit -lm $(LDFLAGS)
+ 
+ ##
+ ##  Project rules.

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

@@ -58,6 +58,7 @@ class Scotch(Package):
 
     # Version-specific patches
     patch('nonthreaded-6.0.4.patch', when='@6.0.4')
+    patch('esmumps-ldflags-6.0.4.patch', when='@6.0.4')
 
     # NOTE: In cross-compiling environment parallel build
     # produces weird linker errors.
@@ -74,6 +75,23 @@ def url_for_version(self, version):
         url = "http://gforge.inria.fr/frs/download.php/latestfile/298/scotch_{0}_esmumps.tar.gz"
         return url.format(version)
 
+    @property
+    def libs(self):
+
+        shared = '+shared' in self.spec
+        libraries = ['libscotch', 'libscotcherr']
+
+        if '+mpi' in self.spec:
+            libraries = ['libptscotch', 'libptscotcherr'] + libraries
+            if '+esmumps' in self.spec:
+                libraries = ['libptesmumps'] + libraries
+        elif '~mpi+esmumps' in self.spec:
+            libraries = ['libesmumps'] + libraries
+
+        return find_libraries(
+            libraries, root=self.prefix, recurse=True, shared=shared
+        )
+
     def patch(self):
         self.configure()
 
@@ -146,7 +164,7 @@ def configure(self):
 
         if '+compression' in self.spec:
             cflags.append('-DCOMMON_FILE_COMPRESS_GZ')
-            ldflags.append('-L%s -lz' % (self.spec['zlib'].prefix.lib))
+            ldflags.append(' {0} '.format(self.spec['zlib'].libs.joined()))
 
         cflags.append('-DCOMMON_PTHREAD')
 

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

@@ -48,6 +48,13 @@ class Zlib(Package):
 
     patch('w_patch.patch', when="@1.2.11%cce")
 
+    @property
+    def libs(self):
+        shared = '+shared' in self.spec
+        return find_libraries(
+            ['libz'], root=self.prefix, recurse=True, shared=shared
+        )
+
     def setup_environment(self, spack_env, run_env):
         if '+pic' in self.spec:
             spack_env.set('CFLAGS', self.compiler.pic_flag)