oce & trilinos: force rpath on Sierra to avoid issues with load commands size (#2855)

* oce: force rpath on Sierra to avoid issues with load commands size

* trilinos: use rpath on Sierra to avoid load commands limit

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

@@ -87,7 +87,11 @@ def install(self, spec, prefix):
                 '-DOCE_OSX_USE_COCOA:BOOL=ON',
             ])
 
-        options.append('-DCMAKE_INSTALL_NAME_DIR:PATH=%s/lib' % prefix)
+        if '.'.join(platform.mac_ver()[0].split('.')[:2]) == '10.12':
+            # use @rpath on Sierra due to limit of dynamic loader
+            options.append('-DCMAKE_MACOSX_RPATH=ON')
+        else:
+            options.append('-DCMAKE_INSTALL_NAME_DIR:PATH=%s/lib' % prefix)
 
         cmake('.', *options)
         make("install/strip")

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

@@ -25,6 +25,7 @@
 from spack import *
 import os
 import sys
+import platform
 
 # Trilinos is complicated to build, as an inspiration a couple of links to
 # other repositories which build it:
@@ -171,10 +172,15 @@ def cmake_args(self):
             '-DLAPACK_LIBRARY_DIRS=%s' % ';'.join(lapack.directories),
             '-DTrilinos_ENABLE_EXPLICIT_INSTANTIATION:BOOL=ON',
             '-DTrilinos_ENABLE_CXX11:BOOL=ON',
-            '-DTPL_ENABLE_Netcdf:BOOL=ON',
-            '-DCMAKE_INSTALL_NAME_DIR:PATH=%s/lib' % self.prefix
+            '-DTPL_ENABLE_Netcdf:BOOL=ON'
         ])
 
+        if '.'.join(platform.mac_ver()[0].split('.')[:2]) == '10.12':
+            # use @rpath on Sierra due to limit of dynamic loader
+            options.append('-DCMAKE_MACOSX_RPATH=ON')
+        else:
+            options.append('-DCMAKE_INSTALL_NAME_DIR:PATH=%s/lib' % prefix)
+
         # Force Trilinos to use the MPI wrappers instead of raw compilers
         # this is needed on Apple systems that require full resolution of
         # all symbols when linking shared libraries