Updated minimum cmake version to 3.19

* The latest cmake versions started showing warnings about the
    minimum version supported as there are possibly some breaking
    changes not affecting us
  * Reworked some bits in CMakeLists.txt to take advantage of the
    raised version
  * Removed the use of policies that are now enabled by cmake by
    default
  * Removed deprecated build options

CMakeLists.txt

@@ -1,38 +1,16 @@
-cmake_minimum_required(VERSION 3.8 FATAL_ERROR)
+cmake_minimum_required(VERSION 3.19 FATAL_ERROR)
 
-cmake_policy(PUSH)
+# Don't create a project if it was already created by another CMakeLists.txt. This makes
-
+# it possible to support both add_subdirectory() and include() ways of using AsmJit as a
-if (POLICY CMP0063)
+# dependency.
-  cmake_policy(SET CMP0063 NEW) # Honor visibility properties.
-endif()
-
-if (POLICY CMP0092)
-  cmake_policy(SET CMP0092 NEW) # Don't add -W3 warning level by default.
-endif()
-
-# Don't create a project if it was already created by another CMakeLists.txt.
-# This allows one library to embed another library without making a collision.
 if (NOT CMAKE_PROJECT_NAME OR "${CMAKE_PROJECT_NAME}" STREQUAL "asmjit")
   project(asmjit CXX)
 endif()
 
 include(CheckCXXCompilerFlag)
-INCLUDE(CheckCXXSourceCompiles)
+include(CheckCXXSourceCompiles)
 include(GNUInstallDirs)
 
-# AsmJit - Deprecated
-# ===================
-
-if (DEFINED ASMJIT_BUILD_EMBED)
-  message(DEPRECATION "ASMJIT_BUILD_EMBED is deprecated, use ASMJIT_EMBED")
-  set(ASMJIT_EMBED "${ASMJIT_BUILD_EMBED}")
-endif()
-
-if (DEFINED ASMJIT_BUILD_STATIC)
-  message(DEPRECATION "ASMJIT_BUILD_STATIC is deprecated, use ASMJIT_STATIC")
-  set(ASMJIT_STATIC "${ASMJIT_BUILD_STATIC}")
-endif()
-
 # AsmJit - Configuration - Build
 # ==============================
 
@@ -212,18 +190,14 @@ function(asmjit_add_target target target_type)
     add_library(${target} ${target_type} ${X_SOURCES})
   endif()
 
-  set_target_properties(${target} PROPERTIES DEFINE_SYMBOL "")
+  set_target_properties(${target}
-  target_link_libraries(${target} PRIVATE ${X_LIBRARIES})
+    PROPERTIES
-
+      DEFINE_SYMBOL ""
-  # target_link_options was added in cmake v3.13, don't use it for now...
+      CXX_VISIBILITY_PRESET hidden)
-  foreach(link_flag ${ASMJIT_PRIVATE_LFLAGS})
-    set_property(TARGET ${target} APPEND_STRING PROPERTY LINK_FLAGS " ${link_flag}")
-  endforeach()
-
-  target_compile_features(${target} PUBLIC cxx_std_11)
-  set_property(TARGET ${target} PROPERTY CXX_EXTENSIONS NO)
-  set_property(TARGET ${target} PROPERTY CXX_VISIBILITY_PRESET hidden)
   target_compile_options(${target} PRIVATE ${X_CFLAGS} ${ASMJIT_SANITIZE_CFLAGS} $<$<CONFIG:Debug>:${X_CFLAGS_DBG}> $<$<NOT:$<CONFIG:Debug>>:${X_CFLAGS_REL}>)
+  target_compile_features(${target} PUBLIC cxx_std_11)
+  target_link_options(${target} PRIVATE ${ASMJIT_PRIVATE_LFLAGS})
+  target_link_libraries(${target} PRIVATE ${X_LIBRARIES})
 
   if ("${target_type}" STREQUAL "TEST")
     add_test(NAME ${target} COMMAND ${target})
@@ -590,10 +564,8 @@ if (NOT ASMJIT_EMBED)
                              $<BUILD_INTERFACE:${ASMJIT_INCLUDE_DIRS}>
                              $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>)
 
-  # Add asmjit::asmjit alias.
+  # Create an asmjit::asmjit alias.
   add_library(asmjit::asmjit ALIAS asmjit)
-  # TODO: [CMAKE] Deprecated alias - we use projectname::libraryname convention now.
-  add_library(AsmJit::AsmJit ALIAS asmjit)
 
   # Add AsmJit install instructions (library and public headers).
   if (NOT ASMJIT_NO_INSTALL)
@@ -713,5 +685,3 @@ if (NOT ASMJIT_EMBED)
 
   endif()
 endif()
-
-cmake_policy(POP)