Merge #164: cmake: Switch from tri-state options to boolean. Stage THREE

2b4ad50 cmake [KILL 3-STATE]: Switch `WITH_{SQLITE,BDB}` to boolean (Hennadii Stepanov)

Pull request description:

  This PR is a continuation of #161 and #162 and tackles with the `WITH_SQLITE` and `WITH_BDB` options.

  For the latter the default value `OFF` is suggested.

  The #83 (comment):
  > Shouldn't `WITH_SQLITE=ON` imply `ENABLE_WALLET`? What (extra) does `ENABLE_WALLET` do here? I'm not sure we'll actually want to keep it as an option.

  has been addressed.

ACKs for top commit:
  TheCharlatan:
    ACK 2b4ad50

Tree-SHA512: 13d5bd16709ab557ee736696fe1d5d3fe64bae8cb77c000401c26b8be2deab0473474f7fa9bb958884ba3ab9c4d0b66e44766ca5c1c86d0fab3957642ec996b9

CMakeLists.txt

@@ -57,7 +57,10 @@ set(CMAKE_CXX_EXTENSIONS OFF)
 
 list(APPEND CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/cmake/module)
 
-# Configurable options.
+#=============================
+# Configurable options
+#=============================
+include(CMakeDependentOption)
 # When adding a new option, end the <help_text> with a full stop for consistency.
 option(BUILD_DAEMON "Build bitcoind executable." ON)
 option(BUILD_CLI "Build bitcoin-cli executable." ON)
@@ -67,20 +70,44 @@ option(BUILD_UTIL_CHAINSTATE "Build experimental bitcoin-chainstate executable."
 option(BUILD_KERNEL_LIB "Build experimental bitcoinkernel library." ${BUILD_UTIL_CHAINSTATE})
 
 option(ENABLE_WALLET "Enable wallet." ON)
-# TODO: These tri-state options will be removed and most features
-#       will become opt-in by default before merging into master.
-include(TristateOption)
-tristate_option(WITH_SQLITE "Enable SQLite wallet support." "if libsqlite3 is found." AUTO)
-tristate_option(WITH_BDB "Enable Berkeley DB (BDB) wallet support." "if libdb_cxx is found." AUTO)
-option(WARN_INCOMPATIBLE_BDB "Warn when using a Berkeley DB (BDB) version other than 4.8." ON)
-include(CMakeDependentOption)
+option(WITH_SQLITE "Enable SQLite wallet support." ${ENABLE_WALLET})
+if(WITH_SQLITE)
+  if(VCPKG_TARGET_TRIPLET)
+    # Use of the `unofficial::` namespace is a vcpkg package manager convention.
+    find_package(unofficial-sqlite3 CONFIG REQUIRED)
+  else()
+    find_package(SQLite3 3.7.17 REQUIRED)
+  endif()
+  set(USE_SQLITE ON)
+  set(ENABLE_WALLET ON)
+endif()
+option(WITH_BDB "Enable Berkeley DB (BDB) wallet support." OFF)
+cmake_dependent_option(WARN_INCOMPATIBLE_BDB "Warn when using a Berkeley DB (BDB) version other than 4.8." ON "WITH_BDB" OFF)
+if(WITH_BDB)
+  find_package(BerkeleyDB 4.8 MODULE REQUIRED)
+  set(USE_BDB ON)
+  set(ENABLE_WALLET ON)
+  if(NOT BerkeleyDB_VERSION VERSION_EQUAL 4.8)
+    message(WARNING "Found Berkeley DB (BDB) other than 4.8.\n"
+                    "BDB (legacy) wallets opened by this build will not be portable!"
+    )
+    if(WARN_INCOMPATIBLE_BDB)
+      message(WARNING "If this is intended, pass \"-DWARN_INCOMPATIBLE_BDB=OFF\".\n"
+                      "Passing \"-DWITH_BDB=OFF\" will suppress this warning."
+      )
+    endif()
+  endif()
+endif()
 cmake_dependent_option(BUILD_WALLET_TOOL "Build bitcoin-wallet tool." ON "ENABLE_WALLET" OFF)
 
 option(THREADLOCAL "Enable features that depend on the C++ thread_local keyword (currently just thread names in debug logs)." ON)
 option(HARDENING "Attempt to harden the resulting executables." ON)
 option(REDUCE_EXPORTS "Attempt to reduce exported symbols in the resulting executables." OFF)
 option(WERROR "Treat compiler warnings as errors." OFF)
 
+# TODO: These tri-state options will be removed and most features
+#       will become opt-in by default before merging into master.
+include(TristateOption)
 tristate_option(CCACHE "Use ccache for compiling." "if ccache is found." AUTO)
 
 option(WITH_NATPMP "Enable NAT-PMP." OFF)

cmake/optional.cmake

@@ -49,47 +49,3 @@ if(CCACHE)
   endif()
   mark_as_advanced(CCACHE_COMMAND)
 endif()
-
-if(ENABLE_WALLET)
-  if(WITH_SQLITE)
-    if(VCPKG_TARGET_TRIPLET)
-      # Use of the `unofficial::` namespace is a vcpkg package manager convention.
-      find_package(unofficial-sqlite3 CONFIG)
-    else()
-      find_package(SQLite3 3.7.17)
-    endif()
-    if(TARGET unofficial::sqlite3::sqlite3 OR TARGET SQLite::SQLite3)
-      set(WITH_SQLITE ON)
-      set(USE_SQLITE ON)
-    elseif(WITH_SQLITE STREQUAL "AUTO")
-      set(WITH_SQLITE OFF)
-    else()
-      message(FATAL_ERROR "SQLite requested, but not found.")
-    endif()
-  endif()
-
-  if(WITH_BDB)
-    find_package(BerkeleyDB 4.8 MODULE)
-    if(BerkeleyDB_FOUND)
-      set(WITH_BDB ON)
-      set(USE_BDB ON)
-      if(NOT BerkeleyDB_VERSION VERSION_EQUAL 4.8)
-        message(WARNING "Found Berkeley DB (BDB) other than 4.8.")
-        if(WARN_INCOMPATIBLE_BDB)
-          message(WARNING "BDB (legacy) wallets opened by this build would not be portable!\n"
-                          "If this is intended, pass \"-DWARN_INCOMPATIBLE_BDB=OFF\".\n"
-                          "Passing \"-DWITH_BDB=OFF\" will suppress this warning.\n")
-        else()
-          message(WARNING "BDB (legacy) wallets opened by this build will not be portable!")
-        endif()
-      endif()
-    else()
-      message(WARNING "Berkeley DB (BDB) required for legacy wallet support, but not found.\n"
-                      "Passing \"-DWITH_BDB=OFF\" will suppress this warning.\n")
-      set(WITH_BDB OFF)
-    endif()
-  endif()
-else()
-  set(WITH_SQLITE OFF)
-  set(WITH_BDB OFF)
-endif()

depends/toolchain.cmake.in

@@ -134,16 +134,22 @@ else()
   set(WITH_ZMQ ON CACHE BOOL "")
 endif()
 
-if(NOT ENABLE_WALLET AND "@no_wallet@" STREQUAL "1")
-  set(ENABLE_WALLET OFF CACHE BOOL "Enable wallet.")
+if("@no_wallet@")
+  set(ENABLE_WALLET OFF CACHE BOOL "")
+else()
+  set(ENABLE_WALLET ON CACHE BOOL "")
 endif()
 
-if(NOT WITH_BDB AND "@no_bdb@" STREQUAL "1")
-  set(WITH_BDB OFF CACHE STRING "Enable Berkeley DB (BDB) wallet support.")
+if("@no_wallet@" OR "@no_bdb@")
+  set(WITH_BDB OFF CACHE BOOL "")
+else()
+  set(WITH_BDB ON CACHE BOOL "")
 endif()
 
-if(NOT WITH_SQLITE AND "@no_sqlite@" STREQUAL "1")
-  set(WITH_SQLITE OFF CACHE STRING "Enable SQLite wallet support.")
+if("@no_wallet@" OR "@no_sqlite@")
+  set(WITH_SQLITE OFF CACHE BOOL "")
+else()
+  set(WITH_SQLITE ON CACHE BOOL "")
 endif()
 
 if("@no_upnp@")