Using Local packages
Generate a local package
After version 2.5.5, we have provided a new local package packaging solution that will seamlessly integrate add_requires
and add_packages
.
We can execute the xmake package
command to generate the default new version of the packaging format.
$ xmake package
package(foo): build/packages/f/foo generated
It will generate the file build/packages/f/foo/xmake.lua
with the following content:
package("foo")
set_description("The foo package")
set_license("Apache-2.0")
add_deps("add", "sub")
on_load(function (package)
package:set("installdir", path.join(os.scriptdir(), package:plat(), package:arch(), package:mode()))
end)
on_fetch(function (package)
local result = {}
result.links = "foo"
result.linkdirs = package:installdir("lib")
result.includedirs = package:installdir("include")
return result
end)
In fact, it uses package()
to define and describe local packages, just like remote packages.
The generated directory structure is as follows:
$ tree build/packages/f/foo/
build/packages/f/foo/
├── macosx
│ └── x86_64
│ └── release
│ ├── include
│ │ └── foo.h
│ └── lib
│ └── libfoo.a
└── xmake.lua
Using generated package
We can also use the add_requires
/add_repositories
interface to seamlessly integrate this package.
add_rules("mode.debug", "mode.release")
add_repositories("local-repo build")
add_requires("foo")
target("bar")
set_kind("binary")
add_files("src/*.cpp")
add_packages("foo")
Among them, add_repositories configuration specifies the warehouse root directory of the local package, and then this package can be referenced through add_requires
.
In addition, the generated local package has another feature, which is to support target/add_deps
, which automatically associates the dependencies of multiple packages, and automatically connects all dependency links during integration.
Here is the complete test example.
"/usr/bin/xcrun -sdk macosx clang++" -o build/macosx/x86_64/release/bar build/.objs/bar/macosx/x86_64/release/src/main.cpp.o -arch x86_64 -mmacosx-version -min=10.15 -isysroot
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX11.0.sdk -stdlib=libc++
-L/Users/ruki/projects/personal/xmake/tests/actions/package/localpkg/bar/build/packages/f/foo/macosx/x86_64/release/lib
-L/Users/ruki/projects/personal/xmake/tests/actions/package/localpkg/bar/build/packages/s/sub/macosx/x86_64/release/lib
-L/Users/ruki/projects/personal/xmake/tests/actions/package/localpkg/bar/build/packages/a/add/macosx/x86_64/release/lib
-Wl,-x -lfoo -lsub -ladd -lz
Using package from CMake
Now cmake is the de facto standard, so the find_package provided by CMake can already find a large number of libraries and modules. We fully reuse this part of cmake's ecology to expand xmake's integration of packages.
We can use find_package("cmake::xxx")
to find some packages with cmake, xmake will automatically generate a cmake script to call cmake's find_package to find some packages and get the bread information.
E.g:
$ xmake l find_package cmake::ZLIB
{
links = {
"z"
},
includedirs = {
"/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.
15.sdk/usr/include"
},
linkdirs = {
"/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.
15.sdk/usr/lib"
}
}
$ xmake l find_package cmake::LibXml2
{
links = {
"xml2"
},
includedirs = {
"/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/usr/include/libxml2"
},
linkdirs = {
"/usr/lib"
}
}
If we integrate and find cmake dependent packages in the xmake.lua project configuration, we usually don't need to use find_package directly, and we can use a more general and simple package integration method.
add_requires("cmake::ZLIB", {alias = "zlib", system = true})
target("test")
set_kind("binary")
add_files("src/*.c")
add_packages("zlib")
We specify system = true
to tell xmake to force cmake to find the package from the system. If it cannot be found, the installation logic will not be followed, because cmake does not provide the installation function of package managers such as vcpkg/conan. Only the package search feature is provided.
Specify version
add_requires("cmake::OpenCV 4.1.1", {system = true})
Specified components
add_requires("cmake::Boost", {system = true, configs = {components = {"regex", "system"}}))
Default switch
add_requires("cmake::Boost", {system = true, configs = {components = {"regex", "system"},
presets = {Boost_USE_STATIC_LIB = true}}})
It is equivalent to predefine some configurations in CMakeLists.txt before calling find_package internally to find the package to control the find_package search strategy and status.
set(Boost_USE_STATIC_LIB ON) - will be used in FindBoost.cmake
find_package(Boost REQUIRED COMPONENTS regex system)
Set environment variables
add_requires("cmake::OpenCV", {system = true, configs = {envs = {CMAKE_PREFIX_PATH = "xxx"}}})
Specify custom FindFoo.cmake module script directory
mydir/cmake_modules/FindFoo.cmake
add_requires("cmake::Foo", {system = true, configs = {moduledirs = "mydir/cmake_modules"}})
Related issues: #1632
Specifying links
For cmake packages, we have added the link_libraries
configuration option to allow users to customize the configuration of package dependencies and even support for target links when looking to use cmake packages.
add_requires("cmake::xxx", {configs = {link_libraries = {"abc::lib1", "abc::lib2"}}})
xmake automatically appends the following configuration to improve the extraction of links libraries when looking for cmake packages.
target_link_libraries(test PRIVATE ABC::lib1 ABC::lib2)
Specify the search mode
In addition, we add the following search mode configuration.
add_requires("cmake::xxx", {configs = {search_mode = "config"}})
add_requires("cmake::xxx", {configs = {search_mode = "module"}})
add_requires("cmake::xxx") -- both
Specify config search mode, for example, to tell cmake to look for packages from XXXConfig.cmake
.
xmake will automatically append the following configuration internally when it looks for cmake packages.
find_package(ABC CONFIG REQUIRED)