pineapple-src/externals/vcpkg/docs/examples/installing-and-using-packages.md

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2022-07-23 01:01:36 +00:00
## Installing and Using Packages Example: SQLite
_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._
- [Step 1: Install](#install)
- [Step 2: Use](#use)
- [VS/MSBuild Project (User-wide integration)](#msbuild)
- [CMake (Toolchain file)](#cmake)
- [Other integration options](../users/buildsystems/integration.md)
---
<a name="install"></a>
## Step 1: Install
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:
```no-highlight
PS D:\src\vcpkg> .\vcpkg search sqlite
libodb-sqlite 2.4.0 Sqlite support for the ODB ORM library
sqlite3 3.32.1 SQLite is a software library that implements a se...
If your library is not listed, please open an issue at:
https://github.com/Microsoft/vcpkg/issues
```
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.
Installing is then as simple as using the `install` command.
```no-highlight
PS D:\src\vcpkg> .\vcpkg install sqlite3
Computing installation plan...
The following packages will be built and installed:
sqlite3[core]:x86-windows
Starting package 1/1: sqlite3:x86-windows
Building package sqlite3[core]:x86-windows...
-- Downloading https://sqlite.org/2020/sqlite-amalgamation-3320100.zip...
-- Extracting source C:/src/vcpkg/downloads/sqlite-amalgamation-3320100.zip
-- Applying patch fix-arm-uwp.patch
-- Using source at C:/src/vcpkg/buildtrees/sqlite3/src/3320100-15aeda126a.clean
-- Configuring x86-windows
-- Building x86-windows-dbg
-- Building x86-windows-rel
-- Performing post-build validation
-- Performing post-build validation done
Building package sqlite3[core]:x86-windows... done
Installing package sqlite3[core]:x86-windows...
Installing package sqlite3[core]:x86-windows... done
Elapsed time for package sqlite3:x86-windows: 12 s
Total elapsed time: 12.04 s
The package sqlite3:x86-windows provides CMake targets:
find_package(unofficial-sqlite3 CONFIG REQUIRED)
target_link_libraries(main PRIVATE unofficial::sqlite3::sqlite3))
```
We can check that sqlite3 was successfully installed for x86 Windows desktop by running the `list` command.
```no-highlight
PS D:\src\vcpkg> .\vcpkg list
sqlite3:x86-windows 3.32.1 SQLite is a software library that implements a se...
```
To install for other architectures and platforms such as Universal Windows Platform or x64 Desktop, you can suffix the package name with `:<target>`.
```no-highlight
PS D:\src\vcpkg> .\vcpkg install sqlite3:x86-uwp zlib:x64-windows
```
See `.\vcpkg help triplet` for all supported targets.
---
<a name="use"></a>
## Step 2: Use
<a name="msbuild"></a>
#### VS/MSBuild Project (User-wide integration)
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.
```no-highlight
PS D:\src\vcpkg> .\vcpkg integrate install
Applied user-wide integration for this vcpkg root.
All C++ projects can now #include any installed libraries.
Linking will be handled automatically.
Installing new libraries will make them instantly available.
```
*Note: You will need to restart Visual Studio or perform a Build to update intellisense with the changes.*
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).
To remove the integration for your user, you can use `.\vcpkg integrate remove`.
<a name="cmake"></a>
#### CMake (Toolchain File)
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:
`-DCMAKE_TOOLCHAIN_FILE=D:\src\vcpkg\scripts\buildsystems\vcpkg.cmake`.
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:
```json
{
"configurations": [{
"name": "x86-Debug",
"generator": "Visual Studio 15 2017",
"configurationType" : "Debug",
"buildRoot": "${env.LOCALAPPDATA}\\CMakeBuild\\${workspaceHash}\\build\\${name}",
"cmakeCommandArgs": "",
"buildCommandArgs": "-m -v:minimal",
"variables": [{
"name": "CMAKE_TOOLCHAIN_FILE",
"value": "D:\\src\\vcpkg\\scripts\\buildsystems\\vcpkg.cmake"
}]
}]
}
```
*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`.*
Now let's make a simple CMake project with a main file.
```cmake
# CMakeLists.txt
cmake_minimum_required(VERSION 3.0)
project(test)
find_package(unofficial-sqlite3 CONFIG REQUIRED)
add_executable(main main.cpp)
target_link_libraries(main PRIVATE unofficial::sqlite3::sqlite3)
```
```cpp
// main.cpp
#include <sqlite3.h>
#include <stdio.h>
int main()
{
printf("%s\n", sqlite3_libversion());
return 0;
}
```
Then, we build our project in the normal CMake way:
```no-highlight
PS D:\src\cmake-test> mkdir build
PS D:\src\cmake-test> cd build
PS D:\src\cmake-test\build> cmake .. "-DCMAKE_TOOLCHAIN_FILE=D:\src\vcpkg\scripts\buildsystems\vcpkg.cmake"
// omitted CMake output here //
-- Build files have been written to: D:/src/cmake-test/build
PS D:\src\cmake-test\build> cmake --build .
// omitted MSBuild output here //
Build succeeded.
0 Warning(s)
0 Error(s)
Time Elapsed 00:00:02.38
PS D:\src\cmake-test\build> .\Debug\main.exe
3.15.0
```
*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.*
##### Handling libraries without native cmake support
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].
```cmake
# To find and use catch
find_path(CATCH_INCLUDE_DIR catch.hpp)
include_directories(${CATCH_INCLUDE_DIR})
# To find and use azure-storage-cpp
find_path(WASTORAGE_INCLUDE_DIR was/blob.h)
find_library(WASTORAGE_LIBRARY wastorage)
include_directories(${WASTORAGE_INCLUDE_DIR})
link_libraries(${WASTORAGE_LIBRARY})
# Note that we recommend using the target-specific directives for a cleaner cmake:
# target_include_directories(main ${LIBRARY})
# target_link_libraries(main PRIVATE ${LIBRARY})
```
[1]: https://cmake.org/cmake/help/latest/command/find_path.html
[2]: https://cmake.org/cmake/help/latest/command/find_library.html