From 1f5cb903e585cc55ff8cf2dacce206e42c36b17c Mon Sep 17 00:00:00 2001
From: Xavier Muller <xavier.muller@etu.u-bordeaux.fr>
Date: Sun, 7 Feb 2021 17:07:47 +0100
Subject: [PATCH] fix superbuild cmake < 3.17 (#193)

* CPM_INDENT in the global scope as suggest

* Fix FetchContent failure with cmake < 3.17

* format
---
 cmake/CPM.cmake | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/cmake/CPM.cmake b/cmake/CPM.cmake
index 2bd2def..cc4418b 100644
--- a/cmake/CPM.cmake
+++ b/cmake/CPM.cmake
@@ -41,6 +41,9 @@ It is recommended to upgrade CPM to the most recent version. \
 See https://github.com/TheLartians/CPM.cmake for more information."
       )
     endif()
+    if(${CMAKE_VERSION} VERSION_LESS "3.17.0")
+      include(FetchContent)
+    endif()
     return()
   endif()
 
@@ -133,7 +136,10 @@ include(CMakeParseArguments)
 
 # Initialize logging prefix
 if(NOT CPM_INDENT)
-  set(CPM_INDENT "CPM:")
+  set(CPM_INDENT
+      "CPM:"
+      CACHE INTERNAL ""
+  )
 endif()
 
 function(cpm_find_package NAME VERSION)