From 12e0eb6178e7db3b17575bca46c2297cb1d1d0c7 Mon Sep 17 00:00:00 2001
From: "John W. Parent" <45471568+johnwparent@users.noreply.github.com>
Date: Thu, 13 Feb 2025 19:15:03 -0500
Subject: [PATCH] zlib package: Ensure correct lib search on Windows (#48512)

* Name of zlib's library differs on Windows; also account for name
  differing when building +shared
* `zlib`'s `.libs` implementation was searching for the runtime
  libraries (the .dlls) and should be searching for link-time libs
---
 var/spack/repos/builtin/packages/zlib/package.py | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/var/spack/repos/builtin/packages/zlib/package.py b/var/spack/repos/builtin/packages/zlib/package.py
index d3b4ffcffdf..33e6650ec0e 100644
--- a/var/spack/repos/builtin/packages/zlib/package.py
+++ b/var/spack/repos/builtin/packages/zlib/package.py
@@ -84,7 +84,12 @@ def determine_version(cls, lib):
     @property
     def libs(self):
         shared = "+shared" in self.spec
-        return find_libraries(["libz"], root=self.prefix, recursive=True, shared=shared)
+        libnames = ["libz"]
+        if self.spec.satisfies("platform=windows"):
+            libnames.append("zdll" if shared else "zlib")
+        return find_libraries(
+            libnames, root=self.prefix, recursive=True, shared=shared, runtime=False
+        )
 
 
 class SetupEnvironment: