From 813263dc3a45a886d5bcb810555a4a32eb3a3f70 Mon Sep 17 00:00:00 2001
From: Michael Maltese <michaeljosephmaltese@gmail.com>
Date: Mon, 20 Feb 2017 16:33:53 -0800
Subject: CMake: Set at most one SSL library

Ref: https://github.com/curl/curl/pull/1228
---
 CMake/Utilities.cmake | 13 +++++++++++++
 1 file changed, 13 insertions(+)

(limited to 'CMake')

diff --git a/CMake/Utilities.cmake b/CMake/Utilities.cmake
index 37cdfe3bf..8b6276df6 100644
--- a/CMake/Utilities.cmake
+++ b/CMake/Utilities.cmake
@@ -29,3 +29,16 @@ function(IN_STR_LIST LIST_NAME ITEM_SEARCHED RETVAL)
     set(${RETVAL} TRUE PARENT_SCOPE)
   endif()
 endfunction()
+
+# Returns a list of arguments that evaluate to true
+function(collect_true output_var output_count_var)
+  set(${output_var})
+  foreach(option_var IN LISTS ARGN)
+    if(${option_var})
+      list(APPEND ${output_var} ${option_var})
+    endif()
+  endforeach()
+  set(${output_var} ${${output_var}} PARENT_SCOPE)
+  list(LENGTH ${output_var} ${output_count_var})
+  set(${output_count_var} ${${output_count_var}} PARENT_SCOPE)
+endfunction()
-- 
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