From 2e90c1972e733ff0bc9111bfeefd1813ab3363eb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sl=C3=A1vek=20Banko?= <slavek.banko@axis.cz>
Date: Wed, 31 May 2023 17:41:48 +0200
Subject: [PATCH] Set CMake policy CMP0057 to NEW. This is necessary for
 CheckLinkerFlag with CMake 3.18.
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Add includes for other checks that are used in TDEMacros.
The initialization of the TDEMacros moved to the beginning.

Signed-off-by: Slávek Banko <slavek.banko@axis.cz>
---
 modules/TDEMacros.cmake | 26 ++++++++++++++++++++++----
 1 file changed, 22 insertions(+), 4 deletions(-)

diff --git a/modules/TDEMacros.cmake b/modules/TDEMacros.cmake
index 2afad68..0ff4c17 100644
--- a/modules/TDEMacros.cmake
+++ b/modules/TDEMacros.cmake
@@ -15,10 +15,6 @@
 #
 #################################################
 
-include( CheckCXXCompilerFlag )
-include( CheckLinkerFlag OPTIONAL )
-include( TDEVersion )
-
 
 #################################################
 #####
@@ -67,6 +63,28 @@ if( NOT TDE_CMAKE_ROOT )
 endif()
 
 
+#################################################
+#####
+##### set necessary CMake policies
+
+if( POLICY CMP0057 )
+  # necessary for CheckLinkerFlag
+  cmake_policy( SET CMP0057 NEW )
+endif()
+
+
+#################################################
+#####
+##### necessary includes
+
+include( CheckCXXCompilerFlag )
+include( CheckCXXSourceCompiles )
+include( CheckLinkerFlag OPTIONAL )
+include( CheckSymbolExists )
+include( CheckTypeSize )
+include( TDEVersion )
+
+
 #################################################
 #####
 ##### tde_message_author_warning