cmake: prepare FindEasyloggingpp module

Author: torbjoernk

cmake/FindEasyloggingpp.cmake

@@ -0,0 +1,25 @@
+# - Find Easyloggingpp
+# Find the native Easyloggingpp includes
+#
+# Easyloggingpp_INCLUDE_PATH - where to find the single header file
+# Easyloggingpp_FOUND - True if Easyloggingpp found.
+
+if(Easyloggingpp_INCLUDE_PATH)
+    # Already in cache, be silent
+    set(Easyloggingpp_FIND_QUIETLY TRUE)
+endif(Easyloggingpp_INCLUDE_PATH)
+
+find_path(Easyloggingpp_INCLUDE_PATH
+    easylogging++.h
+    PATH_SUFFIXES easyloggingpp
+)
+
+# handle the QUIETLY and REQUIRED arguments and set Easyloggingpp_FOUND to TRUE if
+# all listed variables are TRUE
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(Easyloggingpp
+    DEFAULT_MSG
+    Easyloggingpp_INCLUDE_PATH
+)
+
+mark_as_advanced(Easyloggingpp_INCLUDE_PATH)