From 7eebbded25d5518bb6bc33ac091a671ede57caa4 Mon Sep 17 00:00:00 2001
From: Jordan Williams <jordan@jwillikers.com>
Date: Wed, 6 Oct 2021 18:46:53 -0500
Subject: [PATCH] Properly check if the OS is Windows

---
 conan/tools/cmake/toolchain.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/conan/tools/cmake/toolchain.py b/conan/tools/cmake/toolchain.py
index 3caf3e647bf..07bec1ee933 100644
--- a/conan/tools/cmake/toolchain.py
+++ b/conan/tools/cmake/toolchain.py
@@ -145,7 +145,7 @@ def context(self):
         if fpic is None:
             return None
         os_ = self._conanfile.settings.get_safe("os")
-        if os_ and "Windows" in os_:
+        if os_ == "Windows":
             self._conanfile.output.warn("Toolchain: Ignoring fPIC option defined for Windows")
             return None
         shared = self._conanfile.options.get_safe("shared")