Improve subproj handling and deprecated target options:

Exclude several libraries from build when we are included in a
super-project (this is the case when someone only wants to use
xrpl_core). Force several target (deprecated) params to be cache
variables since they are now exposed as options.

Builds/CMake/CMakeFuncs.cmake

@@ -50,11 +50,11 @@ macro(parse_target)
       endif()
 
       if (${cur_component} STREQUAL unity)
-        set(unity true)
+        set(unity ON CACHE BOOL "" FORCE)
       endif()
 
       if (${cur_component} STREQUAL nounity)
-        set(unity false)
+        set(unity OFF CACHE BOOL "" FORCE)
       endif()
 
       if (${cur_component} STREQUAL debug)
@@ -66,12 +66,12 @@ macro(parse_target)
       endif()
 
       if (${cur_component} STREQUAL coverage)
-        set(coverage true)
+        set(coverage ON CACHE BOOL "" FORCE)
         set(debug true)
       endif()
 
       if (${cur_component} STREQUAL profile)
-        set(profile true)
+        set(profile ON CACHE BOOL "" FORCE)
       endif()
     endwhile()
   endif()
@@ -108,3 +108,10 @@ macro(group_sources curdir)
   group_sources_in(${PROJECT_SOURCE_DIR} ${curdir})
 endmacro()
 
+macro (exclude_if_included target_)
+  if (NOT ${CMAKE_CURRENT_SOURCE_DIR} STREQUAL ${CMAKE_SOURCE_DIR})
+    set_target_properties (${target_} PROPERTIES EXCLUDE_FROM_ALL ON)
+    set_target_properties (${target_} PROPERTIES EXCLUDE_FROM_DEFAULT_BUILD ON)
+  endif ()
+endmacro ()
+

CMakeLists.txt

@@ -22,6 +22,12 @@ if (is_multiconfig STREQUAL "NOTFOUND")
   endif ()
 endif ()
 
+if (${CMAKE_CURRENT_SOURCE_DIR} STREQUAL ${CMAKE_SOURCE_DIR})
+  set (is_root_project ON)
+else ()
+  set (is_root_project OFF)
+endif ()
+
 if ("${CMAKE_CXX_COMPILER_ID}" MATCHES ".*Clang") # both Clang and AppleClang
   set (is_clang TRUE)
 elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
@@ -655,6 +661,7 @@ add_custom_command (TARGET lz4 POST_BUILD
     ${CMAKE_BINARY_DIR}/lz4/include
   COMMAND ${CMAKE_COMMAND} -E copy
     $<TARGET_FILE:lz4> ${CMAKE_BINARY_DIR}/lz4/lib)
+exclude_if_included (lz4)
 
 #[===================================================================[
    NIH dep: libarchive (via external project)
@@ -805,6 +812,7 @@ add_custom_command (TARGET sqlite3 POST_BUILD
   COMMAND ${CMAKE_COMMAND} -E copy
     $<TARGET_FILE:sqlite3> ${CMAKE_BINARY_DIR}/sqlite3/lib
   BYPRODUCTS ${CMAKE_BINARY_DIR}/sqlite3/include/sqlite3.h)
+exclude_if_included (sqlite3)
 
 #[===================================================================[
    NIH dep: soci
@@ -840,6 +848,7 @@ target_link_libraries (soci
   Ripple::boost)
 add_library (NIH::soci ALIAS soci)
 target_link_libraries (ripple_libs INTERFACE NIH::soci)
+exclude_if_included (soci)
 
 #[===================================================================[
    NIH dep: snappy
@@ -862,6 +871,7 @@ target_include_directories (snappy
     src/snappy/config)
 add_library (NIH::snappy ALIAS snappy)
 target_link_libraries (ripple_libs INTERFACE NIH::snappy)
+exclude_if_included (snappy)
 
 #[===================================================================[
    NIH dep: rocksdb
@@ -908,6 +918,7 @@ else ()
 endif ()
 add_library (NIH::rocksdb ALIAS rocksdb)
 target_link_libraries (ripple_libs INTERFACE NIH::rocksdb)
+exclude_if_included (rocksdb)
 
 #[===================================================================[
    NIH dep: nudb
@@ -1012,6 +1023,7 @@ target_compile_options (pbufs
     >)
 add_library (Ripple::pbufs ALIAS pbufs)
 target_link_libraries (ripple_libs INTERFACE Ripple::pbufs)
+exclude_if_included (pbufs)
 
 #[===================================================================[
    xrpl_core
@@ -2012,6 +2024,7 @@ target_link_libraries (rippled
   Ripple::libs
   Ripple::boost
   Ripple::xrpl_core)
+exclude_if_included (rippled)
 
 #[===================================================================[
    install stuff
@@ -2041,7 +2054,7 @@ write_basic_package_version_file (
   VERSION ${rippled_version}
   COMPATIBILITY SameMajorVersion)
 
-if (${CMAKE_CURRENT_SOURCE_DIR} STREQUAL ${CMAKE_SOURCE_DIR})
+if (is_root_project)
   install (TARGETS rippled RUNTIME DESTINATION bin)
   set_target_properties(rippled PROPERTIES INSTALL_RPATH_USE_LINK_PATH ON)
   install (
@@ -2063,9 +2076,6 @@ if (${CMAKE_CURRENT_SOURCE_DIR} STREQUAL ${CMAKE_SOURCE_DIR})
     copy_if_not_exists(\"${CMAKE_CURRENT_SOURCE_DIR}/cfg/rippled-example.cfg\" etc rippled.cfg)
     copy_if_not_exists(\"${CMAKE_CURRENT_SOURCE_DIR}/cfg/validators-example.txt\" etc validators.txt)
   ")
-else ()
-  set_target_properties (rippled PROPERTIES EXCLUDE_FROM_ALL ON)
-  set_target_properties (rippled PROPERTIES EXCLUDE_FROM_DEFAULT_BUILD ON)
 endif ()
 
 #[===================================================================[