Build: Bump cmake minimum version to 3.21
Take advantage of newer verion to simplfy build script implementations.
Signed-off-by: David Hu <david.hu@arm.com>
Change-Id: I514844b9de3c847c81665c090639a80a2ea9d360
diff --git a/app_broker/CMakeLists.txt b/app_broker/CMakeLists.txt
index eaf4b3f..f24e612 100644
--- a/app_broker/CMakeLists.txt
+++ b/app_broker/CMakeLists.txt
@@ -8,7 +8,7 @@
# This CMake script used in a split build only. In the legacy 'sinlge' build
# this file is ignoed. Please don't be confused.
#
-cmake_minimum_required(VERSION 3.15)
+cmake_minimum_required(VERSION 3.21)
# This is important to add this SPE subdirectory at first as it
# brings configuration from TF-M build