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130 lines
7.8 KiB
130 lines
7.8 KiB
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short-description: Built-in options to configure project properties |
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# Built-in options |
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Meson provides two kinds of options: [build options provided by the |
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build files](Build-options.md) and built-in options that are either |
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universal options, base options, compiler options. |
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## Universal options |
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A list of these options can be found by running `meson --help`. All |
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these can be set by passing to `meson` (aka `meson setup`) in any of |
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these ways: `--option=value`, `--option value`, `-Doption=value`, or |
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by setting them inside `default_options` of `project()` in your `meson.build`. |
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For legacy reasons `--warnlevel` is the cli argument for the `warning_level` option. |
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They can also be edited after setup using `meson configure`. |
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Installation options are all relative to the prefix, except: |
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* When the prefix is `/usr`: `sysconfdir` defaults to `/etc`, `localstatedir` defaults to `/var`, and `sharedstatedir` defaults to `/var/lib` |
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* When the prefix is `/usr/local`: `localstatedir` defaults to `/var/local`, and `sharedstatedir` defaults to `/var/local/lib` |
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| Option | Default value | Description | |
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| ------ | ------------- | ----------- | |
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| prefix | see below | Installation prefix | |
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| libdir | see below | Library directory | |
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| libexecdir | libexec | Library executable directory | |
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| bindir | bin | Executable directory | |
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| sbindir | sbin | System executable directory | |
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| includedir | include | Header file directory | |
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| datadir | share | Data file directory | |
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| mandir | share/man | Manual page directory | |
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| infodir | share/info | Info page directory | |
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| localedir | share/locale | Locale data directory | |
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| sysconfdir | etc | Sysconf data directory | |
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| localstatedir | var | Localstate data directory | |
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| sharedstatedir | com | Architecture-independent data directory | |
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| werror | false | Treat warnings as errors | |
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| warning_level {0, 1, 2, 3} | 1 | Set the warning level. From 0 = none to 3 = highest | |
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| layout {mirror,flat} | mirror | Build directory layout. | |
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| default_library {shared, static, both} | shared | Default library type. | |
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| backend {ninja, vs,<br>vs2010, vs2015, vs2017, xcode} | | Backend to use (default: ninja). | |
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| stdsplit | | Split stdout and stderr in test logs. | |
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| errorlogs | | Whether to print the logs from failing tests. | |
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| cross-file CROSS_FILE | | File describing cross compilation environment. | |
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| wrap-mode {default, nofallback, nodownload, forcefallback} | | Special wrap mode to use | |
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`prefix` defaults to `C:/` on Windows, and `/usr/local/` otherwise. You should always |
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override this value. |
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`libdir` is automatically detected based on your platform, but the |
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implementation is [currently buggy](https://github.com/mesonbuild/meson/issues/2038) |
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on Linux platforms. |
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There are various other options to set, for instance the backend to use and |
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the path to the cross-file while cross compiling, which won't be repeated here. |
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Please see the output of `meson --help`. |
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## Base options |
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These are set in the same way as universal options, but cannot be shown in the |
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output of `meson --help` because they depend on both the current platform and |
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the compiler that will be selected. The only way to see them is to setup |
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a builddir and then run `meson configure` on it with no options. |
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The following options are available. Note that they may not be available on all |
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platforms or with all compilers: |
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| Option | Default value | Possible values | Description | |
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| ----------- | ------------- | --------------- | ----------- | |
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| b_asneeded | true | true, false | Use -Wl,--as-needed when linking | |
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| b_bitcode | false | true, false | Embed Apple bitcode, see below | |
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| b_colorout | always | auto, always, never | Use colored output | |
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| b_coverage | false | true, false | Enable coverage tracking | |
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| b_vscrt | from_buildtype| none, md, mdd, mt, mtd, from_buildtype | VS runtime library to use (since 0.48.0) | |
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| b_lundef | true | true, false | Don't allow undefined symbols when linking | |
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| b_lto | false | true, false | Use link time optimization | |
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| b_ndebug | false | true, false, if-release | Disable asserts | |
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| b_pch | true | true, false | Use precompiled headers | |
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| b_pgo | off | off, generate, use | Use profile guided optimization | |
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| b_sanitize | none | see below | Code sanitizer to use | |
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| b_staticpic | true | true, false | Build static libraries as position independent | |
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| b_pie | false | true, false | Build position-independent executables (since 0.49.0)| |
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The value of `b_sanitize` can be one of: `none`, `address`, `thread`, |
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`undefined`, `memory`, `address,undefined`. |
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### Notes about Apple Bitcode support |
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`b_bitcode` will pass `-fembed-bitcode` while compiling and will pass |
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`-Wl,-bitcode_bundle` while linking. These options are incompatible with |
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`b_asneeded`, so that option will be silently disabled. |
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[Shared modules](#Reference-manual.md#shared_module) will not have bitcode |
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embedded because `-Wl,-bitcode_bundle` is incompatible with both `-bundle` and |
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`-Wl,-undefined,dynamic_lookup` which are necessary for shared modules to work. |
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## Compiler options |
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Same caveats as base options above. |
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The following options are available. Note that both the options themselves and |
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the possible values they can take will depend on the target platform or |
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compiler being used: |
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| Option | Default value | Possible values | Description | |
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| ------ | ------------- | --------------- | ----------- | |
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| c_args | | free-form comma-separated list | C compile arguments to use | |
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| c_link_args | | free-form comma-separated list | C link arguments to use | |
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| c_std | none | none, c89, c99, c11, gnu89, gnu99, gnu11 | C language standard to use | |
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| c_winlibs | see below | free-form comma-separated list | Standard Windows libs to link against | |
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| cpp_args | | free-form comma-separated list | C++ compile arguments to use | |
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| cpp_link_args| | free-form comma-separated list | C++ link arguments to use | |
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| cpp_std | none | none, c++98, c++03, c++11, c++14, c++17, <br/>c++1z, gnu++03, gnu++11, gnu++14, gnu++17, gnu++1z | C++ language standard to use | |
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| cpp_debugstl | false | true, false | C++ STL debug mode | |
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| cpp_eh | sc | none, a, s, sc | C++ exception handling type | |
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| cpp_winlibs | see below | free-form comma-separated list | Standard Windows libs to link against | |
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The default values of `c_winlibs` and `cpp_winlibs` are in compiler-specific |
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argument forms, but the libraries are: kernel32, user32, gdi32, winspool, |
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shell32, ole32, oleaut32, uuid, comdlg32, advapi32. |
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c_args, cpp_args, c_link_args, and cpp_link_args only affect native builds, |
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when cross compiling they will not be applied to binaries or libraries |
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targeting the host system, only those being run on the build system.
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