[Trivial] Remove checks for CMake < 3.16

Builds/CMake/RippledCore.cmake

@@ -993,13 +993,11 @@ if (reporting)
     target_compile_definitions(rippled PRIVATE RIPPLED_REPORTING)
 endif ()
 
-if (CMAKE_VERSION VERSION_GREATER_EQUAL 3.16)
-  # any files that don't play well with unity should be added here
-  if (tests)
-    set_source_files_properties(
-      # these two seem to produce conflicts in beast teardown template methods
-      src/test/rpc/ValidatorRPC_test.cpp
-      src/test/rpc/ShardArchiveHandler_test.cpp
-      PROPERTIES SKIP_UNITY_BUILD_INCLUSION TRUE)
-  endif () #tests
-endif ()
+# any files that don't play well with unity should be added here
+if (tests)
+  set_source_files_properties(
+    # these two seem to produce conflicts in beast teardown template methods
+    src/test/rpc/ValidatorRPC_test.cpp
+    src/test/rpc/ShardArchiveHandler_test.cpp
+    PROPERTIES SKIP_UNITY_BUILD_INCLUSION TRUE)
+endif () #tests

Builds/CMake/RippledSettings.cmake

@@ -10,13 +10,8 @@ option (tests "Build tests" ON)
 
 option (unity "Creates a build using UNITY support in cmake. This is the default" ON)
 if (unity)
-  if (CMAKE_VERSION VERSION_LESS 3.16)
-    message (WARNING "unity option only supported for with cmake 3.16+ (please upgrade)")
-    set (unity OFF CACHE BOOL "unity only available for cmake 3.16+" FORCE)
-  else ()
-    if (NOT is_ci)
-      set (CMAKE_UNITY_BUILD_BATCH_SIZE 15 CACHE STRING "")
-    endif ()
+  if (NOT is_ci)
+    set (CMAKE_UNITY_BUILD_BATCH_SIZE 15 CACHE STRING "")
   endif ()
 endif ()
 if (is_gcc OR is_clang)

Builds/CMake/RippledValidatorKeys.cmake

@@ -1,6 +1,6 @@
 option (validator_keys "Enables building of validator-keys-tool as a separate target (imported via FetchContent)" OFF)
 
-if (validator_keys AND CMAKE_VERSION VERSION_GREATER_EQUAL 3.11)
+if (validator_keys)
   git_branch (current_branch)
   # default to tracking VK develop branch unless we are on master/release
   if (NOT (current_branch STREQUAL "master" OR current_branch STREQUAL "release"))
@@ -20,5 +20,3 @@ if (validator_keys AND CMAKE_VERSION VERSION_GREATER_EQUAL 3.11)
   endif ()
   add_subdirectory (${validator_keys_src_SOURCE_DIR} ${CMAKE_BINARY_DIR}/validator-keys)
 endif ()
-
-

Builds/CMake/deps/Libarchive.cmake

@@ -125,7 +125,7 @@ if (local_libarchive)
       --build .
       --config $<CONFIG>
       --target archive_static
-      $<$<VERSION_GREATER_EQUAL:${CMAKE_VERSION},3.12>:--parallel ${ep_procs}>
+      --parallel ${ep_procs}
       $<$<BOOL:${is_multiconfig}>:
         COMMAND
           ${CMAKE_COMMAND} -E copy

Builds/CMake/deps/Lz4.cmake

@@ -43,7 +43,7 @@ else()
       --build .
       --config $<CONFIG>
       --target lz4_static
-      $<$<VERSION_GREATER_EQUAL:${CMAKE_VERSION},3.12>:--parallel ${ep_procs}>
+      --parallel ${ep_procs}
       $<$<BOOL:${is_multiconfig}>:
         COMMAND
           ${CMAKE_COMMAND} -E copy

Builds/CMake/deps/Nudb.cmake

@@ -8,40 +8,24 @@
 
 if (is_root_project) # NuDB not needed in the case of xrpl_core inclusion build
   add_library (nudb INTERFACE)
-  if (CMAKE_VERSION VERSION_GREATER_EQUAL 3.11)
-    FetchContent_Declare(
-      nudb_src
-      GIT_REPOSITORY https://github.com/CPPAlliance/NuDB.git
-      GIT_TAG        2.0.5
-    )
-    FetchContent_GetProperties(nudb_src)
-    if(NOT nudb_src_POPULATED)
-      message (STATUS "Pausing to download NuDB...")
-      FetchContent_Populate(nudb_src)
-    endif()
-  else ()
-    ExternalProject_Add (nudb_src
-      PREFIX ${nih_cache_path}
-      GIT_REPOSITORY https://github.com/CPPAlliance/NuDB.git
-      GIT_TAG 2.0.5
-      CONFIGURE_COMMAND ""
-      BUILD_COMMAND ""
-      TEST_COMMAND ""
-      INSTALL_COMMAND ""
-    )
-    ExternalProject_Get_Property (nudb_src SOURCE_DIR)
-    set (nudb_src_SOURCE_DIR "${SOURCE_DIR}")
-    file (MAKE_DIRECTORY ${nudb_src_SOURCE_DIR}/include)
-    add_dependencies (nudb nudb_src)
-  endif ()
+  FetchContent_Declare(
+    nudb_src
+    GIT_REPOSITORY https://github.com/CPPAlliance/NuDB.git
+    GIT_TAG        2.0.5
+  )
+  FetchContent_GetProperties(nudb_src)
+  if(NOT nudb_src_POPULATED)
+    message (STATUS "Pausing to download NuDB...")
+    FetchContent_Populate(nudb_src)
+  endif()
+endif ()
 
-  file(TO_CMAKE_PATH "${nudb_src_SOURCE_DIR}" nudb_src_SOURCE_DIR)
+file(TO_CMAKE_PATH "${nudb_src_SOURCE_DIR}" nudb_src_SOURCE_DIR)
 # specify as system includes so as to avoid warnings
-  target_include_directories (nudb SYSTEM INTERFACE ${nudb_src_SOURCE_DIR}/include)
-  target_link_libraries (nudb
-    INTERFACE
-      Boost::thread
-      Boost::system)
-  add_library (NIH::nudb ALIAS nudb)
-  target_link_libraries (ripple_libs INTERFACE NIH::nudb)
-endif ()
+target_include_directories (nudb SYSTEM INTERFACE ${nudb_src_SOURCE_DIR}/include)
+target_link_libraries (nudb
+  INTERFACE
+    Boost::thread
+    Boost::system)
+add_library (NIH::nudb ALIAS nudb)
+target_link_libraries (ripple_libs INTERFACE NIH::nudb)

Builds/CMake/deps/Protobuf.cmake

@@ -65,7 +65,7 @@ if (local_protobuf OR NOT (Protobuf_FOUND AND Protobuf_PROTOC_EXECUTABLE AND pro
       ${CMAKE_COMMAND}
       --build .
       --config $<CONFIG>
-      $<$<VERSION_GREATER_EQUAL:${CMAKE_VERSION},3.12>:--parallel ${ep_procs}>
+      --parallel ${ep_procs}
     TEST_COMMAND ""
     INSTALL_COMMAND
       ${CMAKE_COMMAND} -E env --unset=DESTDIR ${CMAKE_COMMAND} --build . --config $<CONFIG> --target install

Builds/CMake/deps/Rocksdb.cmake

@@ -136,7 +136,7 @@ if (local_rocksdb)
       ${CMAKE_COMMAND}
       --build .
       --config $<CONFIG>
-      $<$<VERSION_GREATER_EQUAL:${CMAKE_VERSION},3.12>:--parallel ${ep_procs}>
+      --parallel ${ep_procs}
       $<$<BOOL:${is_multiconfig}>:
         COMMAND
           ${CMAKE_COMMAND} -E copy

Builds/CMake/deps/Snappy.cmake

@@ -42,7 +42,7 @@ else()
       ${CMAKE_COMMAND}
       --build .
       --config $<CONFIG>
-      $<$<VERSION_GREATER_EQUAL:${CMAKE_VERSION},3.12>:--parallel ${ep_procs}>
+      --parallel ${ep_procs}
       $<$<BOOL:${is_multiconfig}>:
         COMMAND
           ${CMAKE_COMMAND} -E copy

Builds/CMake/deps/Soci.cmake

@@ -113,7 +113,7 @@ else()
       ${CMAKE_COMMAND}
       --build .
       --config $<CONFIG>
-      $<$<VERSION_GREATER_EQUAL:${CMAKE_VERSION},3.12>:--parallel ${ep_procs}>
+      --parallel ${ep_procs}
       $<$<BOOL:${is_multiconfig}>:
         COMMAND
           ${CMAKE_COMMAND} -E copy

Builds/CMake/deps/Sqlite.cmake

@@ -56,7 +56,7 @@ else()
       ${CMAKE_COMMAND}
       --build .
       --config $<CONFIG>
-      $<$<VERSION_GREATER_EQUAL:${CMAKE_VERSION},3.12>:--parallel ${ep_procs}>
+      --parallel ${ep_procs}
       $<$<BOOL:${is_multiconfig}>:
         COMMAND
           ${CMAKE_COMMAND} -E copy

Builds/CMake/deps/date.cmake

@@ -9,41 +9,10 @@
 
 find_package (date QUIET)
 if (NOT TARGET date::date)
-  if (CMAKE_VERSION VERSION_GREATER_EQUAL 3.14)
-    FetchContent_Declare(
-      hh_date_src
-      GIT_REPOSITORY https://github.com/HowardHinnant/date.git
-      GIT_TAG        fc4cf092f9674f2670fb9177edcdee870399b829
-    )
-    FetchContent_MakeAvailable(hh_date_src)
-  else ()
-    ExternalProject_Add (hh_date_src
-      PREFIX ${nih_cache_path}
-      GIT_REPOSITORY https://github.com/HowardHinnant/date.git
-      GIT_TAG        fc4cf092f9674f2670fb9177edcdee870399b829
-      CONFIGURE_COMMAND ""
-      BUILD_COMMAND ""
-      TEST_COMMAND ""
-      INSTALL_COMMAND ""
-    )
-    ExternalProject_Get_Property (hh_date_src SOURCE_DIR)
-    set (hh_date_src_SOURCE_DIR "${SOURCE_DIR}")
-    file (MAKE_DIRECTORY ${hh_date_src_SOURCE_DIR}/include)
-    add_library (date_interface INTERFACE)
-    add_library (date::date ALIAS date_interface)
-    add_dependencies (date_interface hh_date_src)
-    file (TO_CMAKE_PATH "${hh_date_src_SOURCE_DIR}" hh_date_src_SOURCE_DIR)
-    target_include_directories (date_interface
-      SYSTEM INTERFACE
-          $<BUILD_INTERFACE:${hh_date_src_SOURCE_DIR}/include>
-          $<INSTALL_INTERFACE:include>)
-    install (
-      FILES
-        ${hh_date_src_SOURCE_DIR}/include/date/date.h
-      DESTINATION include/date)
-    install (TARGETS date_interface
-      EXPORT RippleExports
-      INCLUDES DESTINATION include)
-  endif ()
+  FetchContent_Declare(
+    hh_date_src
+    GIT_REPOSITORY https://github.com/HowardHinnant/date.git
+    GIT_TAG        fc4cf092f9674f2670fb9177edcdee870399b829
+  )
+  FetchContent_MakeAvailable(hh_date_src)
 endif ()
-

Builds/CMake/deps/gRPC.cmake

@@ -112,7 +112,7 @@ else ()
         ${CMAKE_COMMAND}
           --build .
           --config $<CONFIG>
-          $<$<VERSION_GREATER_EQUAL:${CMAKE_VERSION},3.12>:--parallel ${ep_procs}>
+          --parallel ${ep_procs}
       TEST_COMMAND ""
       INSTALL_COMMAND
         ${CMAKE_COMMAND} -E env --unset=DESTDIR ${CMAKE_COMMAND} --build . --config $<CONFIG> --target install
@@ -169,7 +169,7 @@ else ()
           ${CMAKE_COMMAND}
             --build .
             --config $<CONFIG>
-            $<$<VERSION_GREATER_EQUAL:${CMAKE_VERSION},3.12>:--parallel ${ep_procs}>
+            --parallel ${ep_procs}
         TEST_COMMAND ""
         INSTALL_COMMAND
           ${CMAKE_COMMAND} -E env --unset=DESTDIR ${CMAKE_COMMAND} --build . --config $<CONFIG> --target install
@@ -237,7 +237,7 @@ else ()
         ${CMAKE_COMMAND}
         --build .
         --config $<CONFIG>
-        $<$<VERSION_GREATER_EQUAL:${CMAKE_VERSION},3.12>:--parallel ${ep_procs}>
+        --parallel ${ep_procs}
         $<$<BOOL:${is_multiconfig}>:
           COMMAND
             ${CMAKE_COMMAND} -E copy

CMakeLists.txt

@@ -25,12 +25,7 @@ list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/Builds/CMake")
 list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/Builds/CMake/deps")
 
 include (CheckCXXCompilerFlag)
-if (CMAKE_VERSION VERSION_GREATER_EQUAL 3.11)
-  include (FetchContent)
-endif ()
-if (MSVC AND CMAKE_VERSION VERSION_LESS 3.12)
-  message (FATAL_ERROR "MSVC requires cmake 3.12 or greater for proper boost support")
-endif ()
+include (FetchContent)
 include (ExternalProject)
 include (CMakeFuncs) # must come *after* ExternalProject b/c it overrides one function in EP
 include (ProcessorCount)