Add "." to libwarpx Aliases (#1720)

* Add "." to libwarpx Aliases

Add a "." to the suffix of the short-hand `libwarpx.<DIM>.<so|dll>`
libs. This unifies the suffix with the structure in executables and
makes it easier to find a "long" version of the library (not in this
PR).

Also fixes the suffix naming on Windows to ".dll", since this is
a true C/C++ library, not a Python module (aka not a shared library
following Python entry points and conventions).

* CMake: Add library alias in install

Also add the expected library alias in CMake install prefixes.

1 files changed, 3 insertions, 4 deletions

diff --git a/Python/pywarpx/_libwarpx.py b/Python/pywarpx/_libwarpx.py
index f8f57bd85..7092e20ec 100755
--- a/Python/pywarpx/_libwarpx.py
+++ b/Python/pywarpx/_libwarpx.py
@@ -59,13 +59,12 @@ else:
 
 _libc = ctypes.CDLL(_find_library('c'))
 
-# macOS/Linux use .so, Windows uses .pyd
-# https://docs.python.org/3/faq/windows.html#is-a-pyd-file-the-same-as-a-dll
+# this is a plain C/C++ shared library, not a Python module
 if os.name == 'nt':
-    mod_ext = "pyd"
+    mod_ext = "dll"
 else:
     mod_ext = "so"
-libname = "libwarpx{0}.{1}".format(geometry_dim, mod_ext)
+libname = "libwarpx.{0}.{1}".format(geometry_dim, mod_ext)
 
 try:
     libwarpx = ctypes.CDLL(os.path.join(_get_package_root(), libname))