134 lines
4.5 KiB
Markdown
134 lines
4.5 KiB
Markdown
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How To Compile with CMake
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# Building with CMake
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This document describes how to configure, build and install curl and libcurl
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from source code using the CMake build tool. To build with CMake, you of
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course first have to install CMake. The minimum required version of CMake is
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specified in the file `CMakeLists.txt` found in the top of the curl source
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tree. Once the correct version of CMake is installed you can follow the
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instructions below for the platform you are building on.
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CMake builds can be configured either from the command line, or from one of
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CMake's GUIs.
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# Current flaws in the curl CMake build
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Missing features in the CMake build:
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- Builds libcurl without large file support
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- Does not support all SSL libraries (only OpenSSL, Schannel, Secure
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Transport, and mbedTLS, WolfSSL)
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- Does not allow different resolver backends (no c-ares build support)
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- No RTMP support built
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- Does not allow build curl and libcurl debug enabled
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- Does not allow a custom CA bundle path
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- Does not allow you to disable specific protocols from the build
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- Does not find or use krb4 or GSS
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- Rebuilds test files too eagerly, but still cannot run the tests
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- Does not detect the correct `strerror_r` flavor when cross-compiling
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(issue #1123)
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# Configuring
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A CMake configuration of curl is similar to the autotools build of curl.
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It consists of the following steps after you have unpacked the source.
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## Using `cmake`
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You can configure for in source tree builds or for a build tree
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that is apart from the source tree.
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- Build in the source tree.
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$ cmake -B .
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- Build in a separate directory (parallel to the curl source tree in this
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example). The build directory is created for you.
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$ cmake -B ../curl-build
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### Fallback for CMake before version 3.13
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CMake before version 3.13 does not support the `-B` option. In that case,
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you must create the build directory yourself, `cd` to it and run `cmake`
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from there:
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$ mkdir ../curl-build
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$ cd ../curl-build
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$ cmake ../curl
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If you want to build in the source tree, it is enough to do this:
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$ cmake .
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## Using `ccmake`
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CMake comes with a curses based interface called `ccmake`. To run `ccmake`
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on a curl use the instructions for the command line cmake, but substitute
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`ccmake` for `cmake`.
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This brings up a curses interface with instructions on the bottom of the
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screen. You can press the "c" key to configure the project, and the "g" key to
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generate the project. After the project is generated, you can run make.
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## Using `cmake-gui`
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CMake also comes with a Qt based GUI called `cmake-gui`. To configure with
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`cmake-gui`, you run `cmake-gui` and follow these steps:
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1. Fill in the "Where is the source code" combo box with the path to
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the curl source tree.
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2. Fill in the "Where to build the binaries" combo box with the path to
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the directory for your build tree, ideally this should not be the same
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as the source tree, but a parallel directory called curl-build or
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something similar.
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3. Once the source and binary directories are specified, press the
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"Configure" button.
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4. Select the native build tool that you want to use.
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5. At this point you can change any of the options presented in the GUI.
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Once you have selected all the options you want, click the "Generate"
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button.
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# Building
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Build (you have to specify the build directory).
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$ cmake --build ../curl-build
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### Fallback for CMake before version 3.13
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CMake before version 3.13 does not support the `--build` option. In that
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case, you have to `cd` to the build directory and use the building tool that
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corresponds to the build files that CMake generated for you. This example
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assumes that CMake generates `Makefile`:
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$ cd ../curl-build
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$ make
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# Testing
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(The test suite does not yet work with the cmake build)
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# Installing
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Install to default location (you have to specify the build directory).
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$ cmake --install ../curl-build
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### Fallback for CMake before version 3.15
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CMake before version 3.15 does not support the `--install` option. In that
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case, you have to `cd` to the build directory and use the building tool that
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corresponds to the build files that CMake generated for you. This example
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assumes that CMake generates `Makefile`:
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$ cd ../curl-build
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$ make install
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