File 0001-Use-correct-relative-paths-for-RUNPATH.patch of Package nest

From 74922ef892d6e95848c1a46bb6962ac041eb064d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Stefan=20Br=C3=BCns?= <stefan.bruens@rwth-aachen.de>
Date: Wed, 27 Jul 2022 15:39:23 +0200
Subject: [PATCH 1/2] Use correct relative paths for RUNPATH

CMAKE_INSTALL_LIBDIR may be a path relative to CMAKE_INSTALL_PREFIX or
absolute. Make sure used paths are absolute, and then calculate the
relative paths between.

For libraries, the relative path is trivially just "./" (all libraries
are in the same directory).

Partial fix for #2438.
---
 cmake/ProcessOptions.cmake | 29 ++++++++++++++++++++---------
 1 file changed, 20 insertions(+), 9 deletions(-)

diff --git a/cmake/ProcessOptions.cmake b/cmake/ProcessOptions.cmake
index fc4bd44..f789ecb 100644
--- a/cmake/ProcessOptions.cmake
+++ b/cmake/ProcessOptions.cmake
@@ -191,29 +191,40 @@ function( NEST_PROCESS_STATIC_LIBRARIES )
     # ``${CMAKE_INSTALL_PREFIX}/bin`` for the nest and sli executables, ``${CMAKE_INSTALL_PREFIX}/lib/nest`` for all
     # dynamic libraries except PyNEST (libnestkernel.so, etc.), and  something like
     # ``${CMAKE_INSTALL_PREFIX}/lib/python3.x/site-packages/nest`` for ``pynestkernel.so``. The RPATH is relative to
-    # this origin, so the binary ``bin/nest`` can find the files in the relative location ``../lib/nest``, and
-    # similarly for PyNEST and the other libraries. For simplicity, we set all the possibilities on all generated
-    # objects.
+    # this origin. For the libraries, the relative path is the same dir ("./"), for the exucutables and python
+    # module the relative path is calculated below.
+    # For simplicity, we set all the possibilities on all generated objects.
 
     # PyNEST can only act as an entry point; it does not need to be included in the other objects' RPATH itself.
 
+    cmake_path(RELATIVE_PATH CMAKE_INSTALL_FULL_LIBDIR
+               BASE_DIRECTORY ${CMAKE_INSTALL_FULL_BINDIR}
+               OUTPUT_VARIABLE executable_libdir_relative_path)
+
+    cmake_path(ABSOLUTE_PATH PYEXECDIR
+               BASE_DIRECTORY ${CMAKE_INSTALL_PREFIX}
+               OUTPUT_VARIABLE pyexecdir_full)
+    cmake_path(RELATIVE_PATH CMAKE_INSTALL_FULL_LIBDIR
+               BASE_DIRECTORY "${pyexecdir_full}/nest"
+               OUTPUT_VARIABLE python_libdir_relative_path)
+
     if ( APPLE )
       set( CMAKE_INSTALL_RPATH
           # for binaries
-          "@loader_path/../${CMAKE_INSTALL_LIBDIR}/nest"
+          "@executable_path/${executable_libdir_relative_path}/nest"
           # for libraries (except pynestkernel)
-          "@loader_path/../../${CMAKE_INSTALL_LIBDIR}/nest"
+          "@loader_path"
           # for pynestkernel: origin at <prefix>/lib/python3.x/site-packages/nest
-          "@loader_path/../../../nest"
+          "@loader_path/${python_libdir_relative_path}/nest"
           PARENT_SCOPE )
     else ()
       set( CMAKE_INSTALL_RPATH
           # for binaries
-          "\$ORIGIN/../${CMAKE_INSTALL_LIBDIR}/nest"
+          "\$ORIGIN/${executable_libdir_relative_path}/nest"
           # for libraries (except pynestkernel)
-          "\$ORIGIN/../../${CMAKE_INSTALL_LIBDIR}/nest"
+          "\$ORIGIN"
           # for pynestkernel: origin at <prefix>/lib/python3.x/site-packages/nest
-          "\$ORIGIN/../../../nest"
+          "\$ORIGIN/${python_libdir_relative_path}/nest"
           PARENT_SCOPE )
     endif ()
 
-- 
2.37.1