fix library-loading issues in editable installs

.github/workflows/pr.yaml

@@ -104,6 +104,7 @@ jobs:
       build_command: |
         sccache -z;
         build-all --verbose;
+        python -c "import kvikio; print(kvikio.__version__)";
         sccache -s;
   wheel-cpp-build:
     secrets: inherit

python/libkvikio/libkvikio/load.py

@@ -63,9 +63,15 @@ def load_library():
         # Prefer the libraries bundled in this package. If they aren't found
         # (which might be the case in builds where the library was prebuilt
         # before packaging the wheel), look for a system installation.
-        libkvikio_lib = _load_wheel_installation(soname)
-        if libkvikio_lib is None:
-            libkvikio_lib = _load_system_installation(soname)
+        try:
+            libkvikio_lib = _load_wheel_installation(soname)
+            if libkvikio_lib is None:
+                libkvikio_lib = _load_system_installation(soname)
+        except OSError:
+            # If none of the searches above succeed, just silently return None
+            # and rely on other mechanisms (like RPATHs on other DSOs) to
+            # help the loader find the library.
+            pass
 
     # The caller almost never needs to do anything with this library, but no
     # harm in offering the option since this object at least provides a handle