Avoid LD_LIBRARY_PATH in pynn-brainscales&hxtorch

We can't drop setting of LD_LIBRARY_PATH completely for now, as the build tool still needs to find stuff (e.g. libclang.so) at runtime. However, this is probably only needed during the waf configure step, so we only set it there.

packages/hxtorch/package.py

@@ -2,9 +2,10 @@
 # Spack Project Developers. See the top-level COPYRIGHT file for details.
 #
 # SPDX-License-Identifier: (Apache-2.0 OR MIT)
+import os
+
 from spack import *
 from spack.pkg.builtin.boost import Boost
-import os
 
 
 class Hxtorch(WafPackage):
@@ -128,7 +129,7 @@ class Hxtorch(WafPackage):
         env.set('C_INCLUDE_PATH', ':'.join(include))
         env.set('CPLUS_INCLUDE_PATH', ':'.join(include))
         env.set('LIBRARY_PATH', ':'.join(library))
-        env.set('LD_LIBRARY_PATH', ':'.join(library))
+        env.set('WAF_CONFIGURE_LD_LIBRARY_PATH', ':'.join(library))
         env.prepend_path('PATH', ':'.join(path))
 
     def setup_run_environment(self, env):
@@ -164,6 +165,8 @@ class Hxtorch(WafPackage):
         args = ['--prefix={0}'.format(self.prefix)]
         args += self.configure_args()
 
+        env = os.environ
+        env['LD_LIBRARY_PATH'] = env.get('WAF_CONFIGURE_LD_LIBRARY_PATH')
         self.waf('configure', '--build-profile=release', *args)
 
     def build_args(self):