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cmake: Support building with libmultiprocess subtree

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When ENABLE_IPC option is on, build with libmultiprocess subtree and
`add_subdirectory(src/ipc/libmultiprocess)` instead of external package
and `find_package(Libmultiprocess)` by default.

Behavior can be toggled with `WITH_EXTERNAL_LIBMULTIPROCESS` option. Using a
subtree should be more convenient for most bitcoin developers, but using an
external package is more convenient for developing in the libmultiprocess
repository.

The `WITH_EXTERNAL_LIBMULTIPROCESS` option is also used to avoid needing to
changing the depends build here. But in later commits, the depends build is
switched to use the add_subdirectory build as well.

Co-authored-by: Cory Fields <cory-nospam-@coryfields.com>
Co-authored-by: Hennadii Stepanov <32963518+hebasto@users.noreply.github.com>
This commit is contained in:
Ryan Ofsky 2025-01-26 13:12:23 -05:00
parent 69f0d4adb7
commit d597ab1dee
4 changed files with 46 additions and 1 deletions
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13
CMakeLists.txt
View file

@ -154,7 +154,8 @@ endif()
cmake_dependent_option(WITH_DBUS "Enable DBus support." ON "CMAKE_SYSTEM_NAME STREQUAL \"Linux\" AND BUILD_GUI" OFF)
option(ENABLE_IPC "Build multiprocess bitcoin-node and bitcoin-gui executables in addition to monolithic bitcoind and bitcoin-qt executables. Requires libmultiprocess library. Experimental." OFF)
if(ENABLE_IPC)
cmake_dependent_option(WITH_EXTERNAL_LIBMULTIPROCESS "Build with external libmultiprocess library instead of with local git subtree when ENABLE_IPC is enabled. This is not normally recommended, but can be useful when cross-compiling or making changes to the upstream project." OFF "ENABLE_IPC" OFF)
if(ENABLE_IPC AND WITH_EXTERNAL_LIBMULTIPROCESS)
find_package(Libmultiprocess REQUIRED COMPONENTS Lib)
find_package(LibmultiprocessNative REQUIRED COMPONENTS Bin
NAMES Libmultiprocess
@ -674,6 +675,16 @@ if(ENABLE_WALLET)
endif()
message(" external signer ..................... ${ENABLE_EXTERNAL_SIGNER}")
message(" ZeroMQ .............................. ${WITH_ZMQ}")
if(ENABLE_IPC)
if (WITH_EXTERNAL_LIBMULTIPROCESS)
set(ipc_status "ON (with external libmultiprocess)")
else()
set(ipc_status ON)
endif()
else()
set(ipc_status OFF)
endif()
message(" IPC ................................. ${ipc_status}")
message(" USDT tracing ........................ ${WITH_USDT}")
message(" QR code (GUI) ....................... ${WITH_QRENCODE}")
message(" DBus (GUI, Linux only) .............. ${WITH_DBUS}")

28
cmake/libmultiprocess.cmake Normal file
View file

@ -0,0 +1,28 @@
# Copyright (c) 2025 The Bitcoin Core developers
# Distributed under the MIT software license, see the accompanying
# file COPYING or https://opensource.org/license/mit/.
function(add_libmultiprocess subdir)
# Set BUILD_TESTING to match BUILD_TESTS. BUILD_TESTING is a standard cmake
# option that controls whether enable_testing() is called, but in the bitcoin
# build a BUILD_TESTS option is used instead.
set(BUILD_TESTING "${BUILD_TESTS}")
add_subdirectory(${subdir} EXCLUDE_FROM_ALL)
# Apply core_interface compile options to libmultiprocess runtime library.
target_link_libraries(multiprocess PUBLIC $<BUILD_INTERFACE:core_interface>)
target_link_libraries(mputil PUBLIC $<BUILD_INTERFACE:core_interface>)
target_link_libraries(mpgen PUBLIC $<BUILD_INTERFACE:core_interface>)
# Mark capproto options as advanced to hide by default from cmake UI
mark_as_advanced(CapnProto_DIR)
mark_as_advanced(CapnProto_capnpc_IMPORTED_LOCATION)
mark_as_advanced(CapnProto_capnp_IMPORTED_LOCATION)
mark_as_advanced(CapnProto_capnp-json_IMPORTED_LOCATION)
mark_as_advanced(CapnProto_capnp-rpc_IMPORTED_LOCATION)
mark_as_advanced(CapnProto_capnp-websocket_IMPORTED_LOCATION)
mark_as_advanced(CapnProto_kj-async_IMPORTED_LOCATION)
mark_as_advanced(CapnProto_kj-gzip_IMPORTED_LOCATION)
mark_as_advanced(CapnProto_kj-http_IMPORTED_LOCATION)
mark_as_advanced(CapnProto_kj_IMPORTED_LOCATION)
mark_as_advanced(CapnProto_kj-test_IMPORTED_LOCATION)
mark_as_advanced(CapnProto_kj-tls_IMPORTED_LOCATION)
endfunction()

2
depends/toolchain.cmake.in
View file

@ -160,8 +160,10 @@ endif()
if("@multiprocess@" STREQUAL "1")
set(ENABLE_IPC ON CACHE BOOL "")
set(WITH_EXTERNAL_LIBMULTIPROCESS ON CACHE BOOL "")
set(Libmultiprocess_ROOT "${CMAKE_CURRENT_LIST_DIR}" CACHE PATH "")
set(LibmultiprocessNative_ROOT "${CMAKE_CURRENT_LIST_DIR}/native" CACHE PATH "")
else()
set(ENABLE_IPC OFF CACHE BOOL "")
set(WITH_EXTERNAL_LIBMULTIPROCESS OFF CACHE BOOL "")
endif()

4
src/CMakeLists.txt
View file

@ -19,6 +19,10 @@ include(../cmake/crc32c.cmake)
include(../cmake/leveldb.cmake)
include(../cmake/minisketch.cmake)
add_subdirectory(univalue)
if (ENABLE_IPC AND NOT WITH_EXTERNAL_LIBMULTIPROCESS)
include(../cmake/libmultiprocess.cmake)
add_libmultiprocess(ipc/libmultiprocess)
endif()
#=============================
# secp256k1 subtree
#=============================