Fix for ESMF post_install on macOS (#36087)

1 files changed, 10 insertions, 6 deletions

diff --git a/var/spack/repos/builtin/packages/esmf/package.py b/var/spack/repos/builtin/packages/esmf/package.py
index 50d9cf6c6b..4aefe352b5 100644
--- a/var/spack/repos/builtin/packages/esmf/package.py
+++ b/var/spack/repos/builtin/packages/esmf/package.py
@@ -4,6 +4,7 @@
 # SPDX-License-Identifier: (Apache-2.0 OR MIT)
 
 import os
+import sys
 
 from spack.build_environment import dso_suffix, stat_suffix
 from spack.package import *
@@ -352,12 +353,15 @@ class Esmf(MakefilePackage):
     @run_after("install")
     def post_install(self):
         install_tree("cmake", self.prefix.cmake)
-        # Several applications using ESMF are affected by CMake capitalization
-        # issue. The following fix allows all apps to use as-is.
-        for prefix in [dso_suffix, stat_suffix]:
-            library_path = os.path.join(self.prefix.lib, "libesmf.%s" % prefix)
-            if os.path.exists(library_path):
-                os.symlink(library_path, os.path.join(self.prefix.lib, "libESMF.%s" % prefix))
+        # Several applications using ESMF are affected by CMake
+        # capitalization issue. The following fix allows all apps
+        # to use as-is. Note that since the macOS file system is
+        # case-insensitive, this step is not allowed on macOS.
+        if sys.platform != "darwin":
+            for prefix in [dso_suffix, stat_suffix]:
+                library_path = os.path.join(self.prefix.lib, "libesmf.%s" % prefix)
+                if os.path.exists(library_path):
+                    os.symlink(library_path, os.path.join(self.prefix.lib, "libESMF.%s" % prefix))
 
     def check(self):
         make("check", parallel=False)