fix: minor CMake warning fix for unused variable (#3718)

8c859e48 · Henry Schreiner · ec24786e · 8c859e48
Commit 8c859e48 authored Feb 10, 2022 by Henry Schreiner
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tools/FindCatch.cmake
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--- a/tools/FindCatch.cmake
+++ b/tools/FindCatch.cmake
@@ -9,6 +9,8 @@
 #  CATCH_INCLUDE_DIR      - path to catch.hpp
 #  CATCH_VERSION          - version number

+option(DOWNLOAD_CATCH "Download catch2 if not found")
+
 if(NOT Catch_FIND_VERSION)
  message(FATAL_ERROR "A version number must be specified.")
 elseif(Catch_FIND_REQUIRED)