Update required CMake

AWSCRTAndroidTestRunner/app/src/main/cpp/CMakeLists.txt

@@ -3,7 +3,7 @@
 
 # Sets the minimum version of CMake required to build the native library.
 
-cmake_minimum_required(VERSION 3.4.1)
+cmake_minimum_required(VERSION 3.13)
 
 # AWS lib
 set(path_to_common "${CMAKE_CURRENT_LIST_DIR}/../../../../..")

CMakeLists.txt

@@ -1,7 +1,7 @@
 # Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
 # SPDX-License-Identifier: Apache-2.0.
 
-cmake_minimum_required(VERSION 3.0)
+cmake_minimum_required(VERSION 3.13)
 option(ALLOW_CROSS_COMPILED_TESTS "Allow tests to be compiled via cross compile, for use with qemu" OFF)
 
 project(aws-c-common LANGUAGES C VERSION 0.1.0)
@@ -181,7 +181,6 @@ file(GLOB COMMON_SRC
         ${AWS_COMMON_EXTERNAL_SRC}
         )
 
-aws_set_common_policies()
 add_library(${PROJECT_NAME} ${COMMON_SRC})
 aws_set_common_properties(${PROJECT_NAME} NO_WEXTRA)
 aws_prepare_symbol_visibility_args(${PROJECT_NAME} "AWS_COMMON")

cmake/AwsCFlags.cmake

@@ -43,20 +43,6 @@ function(aws_check_posix_lfs extra_flags variable)
     endif()
 endfunction()
 
-# This function sets common CMake policies.
-# Call this before calling add_library() or add_executable().
-function(aws_set_common_policies)
-    # Enable LTO/IPO if available in the compiler
-    if (POLICY CMP0069)
-        cmake_policy(SET CMP0069 NEW)
-    endif()
-
-    # Honor visibility properties for all target types
-    if (POLICY CMP0063)
-        cmake_policy(SET CMP0063 NEW)
-    endif()
-endfunction()
-
 # This function will set all common flags on a target
 # Options:
 #  NO_WGNU: Disable -Wgnu
@@ -183,8 +169,7 @@ function(aws_set_common_properties target)
         # If the symbols from libcrypto.a aren't hidden, then SOME function calls use the libcrypto.a implementation
         # and SOME function calls use the libcrypto.so implementation, and this mismatch leads to weird crashes.
         if (UNIX AND NOT APPLE)
-            # If we used target_link_options() (CMake 3.13+) we could make these flags PUBLIC
-            set_property(TARGET ${target} APPEND_STRING PROPERTY LINK_FLAGS " -Wl,--exclude-libs,libcrypto.a")
+            target_link_options(${target} PUBLIC "LINKER:--exclude-libs,libcrypto.a")
         endif()
 
     endif()