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cmake: Download Boost if inadequate local version 

Building SDL2 from externals is incompatible with Conan's version of
libiconv, a requirement of Conan's Boost package. Solution is to use the
same Boost package in use by the linux-fresh container. This tells CMake
to download boost_1_75_0.tar.xz from yuzu-emu/ext-linux-bin at CMake's
configuration step, much the same way Qt and FFmpeg are downloaded for
Windows.

Also makes DownloadExternals.cmake cross-platform. Although the CMake
code is not entirely specific to Linux, only Linux has Boost libraries
available at ext-linux-bin, whereas there is no equivalent Boost package
for Windows at ext-windows-bin. caveat emptor
This commit is contained in:
lat9nq 2021-04-21 01:51:28 -04:00
parent 607ff3489c
commit ad55faaa35
2 changed files with 37 additions and 5 deletions
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20
CMakeLists.txt
View File

@ -19,6 +19,8 @@ CMAKE_DEPENDENT_OPTION(YUZU_USE_BUNDLED_QT "Download bundled Qt binaries" ON "EN
option(ENABLE_WEB_SERVICE "Enable web services (telemetry, etc.)" ON)
option(YUZU_USE_BUNDLED_BOOST "Download bundled Boost" OFF)
CMAKE_DEPENDENT_OPTION(YUZU_USE_BUNDLED_FFMPEG "Download/Build bundled FFmpeg" ON "WIN32" OFF)
option(YUZU_USE_QT_WEB_ENGINE "Use QtWebEngine for web applet implementation" OFF)
@ -199,7 +201,9 @@ macro(yuzu_find_packages)
unset(FN_FORCE_REQUIRED)
endmacro()
find_package(Boost 1.73.0 COMPONENTS context headers QUIET)
if (NOT YUZU_USE_BUNDLED_BOOST)
find_package(Boost 1.73.0 COMPONENTS context headers QUIET)
endif()
if (Boost_FOUND)
set(Boost_LIBRARIES Boost::boost)
# Conditionally add Boost::context only if the active version of the Conan or system Boost package provides it
@ -210,6 +214,20 @@ if (Boost_FOUND)
if (TARGET Boost::context)
list(APPEND Boost_LIBRARIES Boost::context)
endif()
elseif (${CMAKE_SYSTEM_NAME} STREQUAL "Linux" OR YUZU_USE_BUNDLED_BOOST)
message(STATUS "Boost 1.73.0 or newer not found, falling back to externals")
set(YUZU_USE_BUNDLED_BOOST ON CACHE BOOL "Download bundled Boost" FORCE)
# Use yuzu Boost binaries
set(Boost_EXT_NAME "boost_1_75_0")
set(Boost_PATH "${CMAKE_BINARY_DIR}/externals/${Boost_EXT_NAME}")
download_bundled_external("boost/" ${Boost_EXT_NAME} "")
set(Boost_USE_DEBUG_RUNTIME FALSE)
set(Boost_USE_STATIC_LIBS ON)
find_package(Boost 1.75.0 REQUIRED COMPONENTS context headers PATHS ${Boost_PATH} NO_DEFAULT_PATH)
# Manually set the include dirs since the find_package sets it incorrectly
set(Boost_INCLUDE_DIRS ${Boost_PATH}/include CACHE PATH "Path to Boost headers" FORCE)
include_directories(SYSTEM "${Boost_INCLUDE_DIRS}")
else()
message(STATUS "Boost 1.73.0 or newer not found, falling back to Conan")
list(APPEND CONAN_REQUIRED_LIBS "boost/1.73.0")

22
CMakeModules/DownloadExternals.cmake
View File

@ -4,15 +4,29 @@
# remote_path: path to the file to download, relative to the remote repository root
# prefix_var: name of a variable which will be set with the path to the extracted contents
function(download_bundled_external remote_path lib_name prefix_var)
set(package_repo "no_platform")
set(package_extension "no_platform")
if (WIN32)
set(package_repo "ext-windows-bin/raw/master/")
set(package_extension ".7z")
elseif (${CMAKE_SYSTEM_NAME} STREQUAL "Linux")
set(package_repo "ext-linux-bin/raw/main/")
set(package_extension ".tar.xz")
else()
message(FATAL_ERROR "No package available for this platform")
endif()
set(package_url "https://github.com/yuzu-emu/${package_repo}")
set(prefix "${CMAKE_BINARY_DIR}/externals/${lib_name}")
if (NOT EXISTS "${prefix}")
message(STATUS "Downloading binaries for ${lib_name}...")
file(DOWNLOAD
https://github.com/yuzu-emu/ext-windows-bin/raw/master/${remote_path}${lib_name}.7z
"${CMAKE_BINARY_DIR}/externals/${lib_name}.7z" SHOW_PROGRESS)
execute_process(COMMAND ${CMAKE_COMMAND} -E tar xf "${CMAKE_BINARY_DIR}/externals/${lib_name}.7z"
${package_url}${remote_path}${lib_name}${package_extension}
"${CMAKE_BINARY_DIR}/externals/${lib_name}${package_extension}" SHOW_PROGRESS)
execute_process(COMMAND ${CMAKE_COMMAND} -E tar xf "${CMAKE_BINARY_DIR}/externals/${lib_name}${package_extension}"
WORKING_DIRECTORY "${CMAKE_BINARY_DIR}/externals")
endif()
message(STATUS "Using bundled binaries at ${prefix}")
set(${prefix_var} "${prefix}" PARENT_SCOPE)
endfunction()
endfunction()