From 53e65e8e0a91f7b83e2f0f27781e75c2868a321d Mon Sep 17 00:00:00 2001
From: Brad King <brad.king@kitware.com>
Date: Thu, 25 Oct 2018 11:47:48 -0400
Subject: curl: Do not call cmake_minimum_required inside CMake itself

Re-use the requirements from the top-level.
---
 Utilities/cmcurl/CMakeLists.txt | 1 -
 1 file changed, 1 deletion(-)

diff --git a/Utilities/cmcurl/CMakeLists.txt b/Utilities/cmcurl/CMakeLists.txt
index 636530e..f38b7d4 100644
--- a/Utilities/cmcurl/CMakeLists.txt
+++ b/Utilities/cmcurl/CMakeLists.txt
@@ -123,7 +123,6 @@ endif()
 # To check:
 # (From Daniel Stenberg) The cmake build selected to run gcc with -fPIC on my box while the plain configure script did not.
 # (From Daniel Stenberg) The gcc command line use neither -g nor any -O options. As a developer, I also treasure our configure scripts's --enable-debug option that sets a long range of "picky" compiler options.
-cmake_minimum_required(VERSION 3.0 FATAL_ERROR)
 set(CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/CMake;${CMAKE_MODULE_PATH}")
 include(Utilities)
 include(Macros)
-- 
cgit v0.12


From 786dddc0fd0439b7f7ba1f062d60720f16627856 Mon Sep 17 00:00:00 2001
From: Cristian Adam <cristian.adam@gmail.com>
Date: Fri, 19 Oct 2018 14:53:32 +0200
Subject: Add option to build CMake itself with IPO/LTO

Create a `CMake_BUILD_LTO` option when building with a CMake that
is new enough to support `CheckIPOSupported` everywhere.
---
 CMakeLists.txt | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index e94503c..756e379 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -117,6 +117,18 @@ option(CMake_BUILD_DEVELOPER_REFERENCE
   "Build CMake Developer Reference" OFF)
 mark_as_advanced(CMake_BUILD_DEVELOPER_REFERENCE)
 
+# option to build using interprocedural optimizations (IPO/LTO)
+if (NOT CMAKE_VERSION VERSION_LESS 3.12.2)
+  option(CMake_BUILD_LTO "Compile CMake with link-time optimization if supported" OFF)
+  if(CMake_BUILD_LTO)
+    include(CheckIPOSupported)
+    check_ipo_supported(RESULT HAVE_IPO)
+    if(HAVE_IPO)
+      set(CMAKE_INTERPROCEDURAL_OPTIMIZATION TRUE)
+    endif()
+  endif()
+endif()
+
 #-----------------------------------------------------------------------
 # a macro to deal with system libraries, implemented as a macro
 # simply to improve readability of the main script
-- 
cgit v0.12