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183 lines
7.1 KiB
Markdown
Executable File
183 lines
7.1 KiB
Markdown
Executable File
## Installing and Using Packages Example: SQLite
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_Note: this old example uses Classic Mode, but most developers will be happier with Manifest Mode. See [Manifest Mode: CMake Example](manifest-mode-cmake.md) for an example of converting to Manifest Mode._
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- [Step 1: Install](#install)
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- [Step 2: Use](#use)
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- [VS/MSBuild Project (User-wide integration)](#msbuild)
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- [CMake (Toolchain file)](#cmake)
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- [Other integration options](../users/buildsystems/integration.md)
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---
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<a name="install"></a>
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## Step 1: Install
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First, we need to know what name [SQLite](https://sqlite.org) goes by in the ports tree. To do that, we'll run the `search` command and inspect the output:
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```no-highlight
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PS D:\src\vcpkg> .\vcpkg search sqlite
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libodb-sqlite 2.4.0 Sqlite support for the ODB ORM library
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sqlite3 3.32.1 SQLite is a software library that implements a se...
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If your library is not listed, please open an issue at:
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https://github.com/Microsoft/vcpkg/issues
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```
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Looking at the list, we can see that the port is named "sqlite3". You can also run the `search` command without arguments to see the full list of packages.
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Installing is then as simple as using the `install` command.
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```no-highlight
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PS D:\src\vcpkg> .\vcpkg install sqlite3
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Computing installation plan...
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The following packages will be built and installed:
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sqlite3[core]:x86-windows
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Starting package 1/1: sqlite3:x86-windows
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Building package sqlite3[core]:x86-windows...
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-- Downloading https://sqlite.org/2020/sqlite-amalgamation-3320100.zip...
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-- Extracting source C:/src/vcpkg/downloads/sqlite-amalgamation-3320100.zip
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-- Applying patch fix-arm-uwp.patch
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-- Using source at C:/src/vcpkg/buildtrees/sqlite3/src/3320100-15aeda126a.clean
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-- Configuring x86-windows
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-- Building x86-windows-dbg
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-- Building x86-windows-rel
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-- Performing post-build validation
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-- Performing post-build validation done
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Building package sqlite3[core]:x86-windows... done
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Installing package sqlite3[core]:x86-windows...
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Installing package sqlite3[core]:x86-windows... done
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Elapsed time for package sqlite3:x86-windows: 12 s
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Total elapsed time: 12.04 s
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The package sqlite3:x86-windows provides CMake targets:
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find_package(unofficial-sqlite3 CONFIG REQUIRED)
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target_link_libraries(main PRIVATE unofficial::sqlite3::sqlite3))
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```
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We can check that sqlite3 was successfully installed for x86 Windows desktop by running the `list` command.
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```no-highlight
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PS D:\src\vcpkg> .\vcpkg list
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sqlite3:x86-windows 3.32.1 SQLite is a software library that implements a se...
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```
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To install for other architectures and platforms such as Universal Windows Platform or x64 Desktop, you can suffix the package name with `:<target>`.
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```no-highlight
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PS D:\src\vcpkg> .\vcpkg install sqlite3:x86-uwp zlib:x64-windows
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```
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See `.\vcpkg help triplet` for all supported targets.
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---
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<a name="use"></a>
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## Step 2: Use
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<a name="msbuild"></a>
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#### VS/MSBuild Project (User-wide integration)
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The recommended and most productive way to use vcpkg is via user-wide integration, making the system available for all projects you build. The user-wide integration will prompt for administrator access the first time it is used on a given machine, but afterwards is no longer required and the integration is configured on a per-user basis.
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```no-highlight
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PS D:\src\vcpkg> .\vcpkg integrate install
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Applied user-wide integration for this vcpkg root.
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All C++ projects can now #include any installed libraries.
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Linking will be handled automatically.
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Installing new libraries will make them instantly available.
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```
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*Note: You will need to restart Visual Studio or perform a Build to update intellisense with the changes.*
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You can now simply use File -> New Project in Visual Studio and the library will be automatically available. For SQLite, you can try out their [C/C++ sample](https://sqlite.org/quickstart.html).
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To remove the integration for your user, you can use `.\vcpkg integrate remove`.
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<a name="cmake"></a>
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#### CMake (Toolchain File)
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The best way to use installed libraries with cmake is via the toolchain file `scripts\buildsystems\vcpkg.cmake`. To use this file, you simply need to add it onto your CMake command line as:
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`-DCMAKE_TOOLCHAIN_FILE=D:\src\vcpkg\scripts\buildsystems\vcpkg.cmake`.
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If you are using CMake through Open Folder with Visual Studio you can define `CMAKE_TOOLCHAIN_FILE` by adding a "variables" section to each of your `CMakeSettings.json` configurations:
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```json
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{
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"configurations": [{
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"name": "x86-Debug",
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"generator": "Visual Studio 15 2017",
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"configurationType" : "Debug",
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"buildRoot": "${env.LOCALAPPDATA}\\CMakeBuild\\${workspaceHash}\\build\\${name}",
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"cmakeCommandArgs": "",
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"buildCommandArgs": "-m -v:minimal",
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"variables": [{
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"name": "CMAKE_TOOLCHAIN_FILE",
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"value": "D:\\src\\vcpkg\\scripts\\buildsystems\\vcpkg.cmake"
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}]
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}]
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}
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```
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*Note: It might be necessary to delete the CMake cache folder of each modified configuration, to force a full regeneration. In the `CMake` menu, under `Cache (<configuration name>)` you'll find `Delete Cache Folders`.*
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Now let's make a simple CMake project with a main file.
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```cmake
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# CMakeLists.txt
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cmake_minimum_required(VERSION 3.0)
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project(test)
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find_package(unofficial-sqlite3 CONFIG REQUIRED)
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add_executable(main main.cpp)
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target_link_libraries(main PRIVATE unofficial::sqlite3::sqlite3)
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```
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```cpp
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// main.cpp
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#include <sqlite3.h>
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#include <stdio.h>
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int main()
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{
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printf("%s\n", sqlite3_libversion());
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return 0;
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}
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```
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Then, we build our project in the normal CMake way:
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```no-highlight
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PS D:\src\cmake-test> mkdir build
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PS D:\src\cmake-test> cd build
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PS D:\src\cmake-test\build> cmake .. "-DCMAKE_TOOLCHAIN_FILE=D:\src\vcpkg\scripts\buildsystems\vcpkg.cmake"
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// omitted CMake output here //
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-- Build files have been written to: D:/src/cmake-test/build
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PS D:\src\cmake-test\build> cmake --build .
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// omitted MSBuild output here //
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Build succeeded.
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0 Warning(s)
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0 Error(s)
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Time Elapsed 00:00:02.38
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PS D:\src\cmake-test\build> .\Debug\main.exe
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3.15.0
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```
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*Note: The correct sqlite3.dll is automatically copied to the output folder when building for x86-windows. You will need to distribute this along with your application.*
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##### Handling libraries without native cmake support
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Unlike other platforms, we do not automatically add the `include\` directory to your compilation line by default. If you're using a library that does not provide CMake integration, you will need to explicitly search for the files and add them yourself using [`find_path()`][1] and [`find_library()`][2].
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```cmake
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# To find and use catch
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find_path(CATCH_INCLUDE_DIR catch.hpp)
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include_directories(${CATCH_INCLUDE_DIR})
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# To find and use azure-storage-cpp
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find_path(WASTORAGE_INCLUDE_DIR was/blob.h)
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find_library(WASTORAGE_LIBRARY wastorage)
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include_directories(${WASTORAGE_INCLUDE_DIR})
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link_libraries(${WASTORAGE_LIBRARY})
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# Note that we recommend using the target-specific directives for a cleaner cmake:
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# target_include_directories(main ${LIBRARY})
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# target_link_libraries(main PRIVATE ${LIBRARY})
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```
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[1]: https://cmake.org/cmake/help/latest/command/find_path.html
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[2]: https://cmake.org/cmake/help/latest/command/find_library.html
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