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118 lines
8.3 KiB
118 lines
8.3 KiB
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short-description: Configuring a pre-generated build directory |
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# Configuring a build directory |
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Often you want to change the settings of your build after it has been |
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generated. For example you might want to change from a debug build |
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into a release build, set custom compiler flags, change the build |
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options provided in your `meson_options.txt` file and so on. |
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The main tool for this is the `meson configure` command. |
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You invoke `meson configure` by giving it the location of your build dir. If |
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omitted, the current working directory is used instead. Here's a |
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sample output for a simple project. |
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Core properties |
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Source dir /home/jpakkane/clangdemo/2_address |
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Build dir /home/jpakkane/clangdemo/2_address/buildmeson |
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Core options: |
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Option Current Value Possible Values Description |
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------ ------------- --------------- ----------- |
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auto_features auto [enabled, disabled, auto] Override value of all 'auto' features |
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backend ninja [ninja, vs, vs2010, vs2015, vs2017, xcode] Backend to use |
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buildtype release [plain, debug, debugoptimized, release, minsize, custom] Build type to use |
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debug false [true, false] Debug |
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default_library shared [shared, static, both] Default library type |
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install_umask 0022 [preserve, 0000-0777] Default umask to apply on permissions of installed files |
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layout mirror [mirror, flat] Build directory layout |
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optimization 3 [0, g, 1, 2, 3, s] Optimization level |
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strip false [true, false] Strip targets on install |
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unity off [on, off, subprojects] Unity build |
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warning_level 1 [0, 1, 2, 3] Compiler warning level to use |
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werror false [true, false] Treat warnings as errors |
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Backend options: |
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Option Current Value Possible Values Description |
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------ ------------- --------------- ----------- |
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backend_max_links 0 >=0 Maximum number of linker processes to run or 0 for no limit |
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Base options: |
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Option Current 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_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_lto false [true, false] Use link time optimization |
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b_lundef true [true, false] Use -Wl,--no-undefined when linking |
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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 [none, address, thread, undefined, memory, address,undefined] Code sanitizer to use |
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b_staticpic true [true, false] Build static libraries as position independent |
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Compiler options: |
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Option Current Value Possible Values Description |
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------ ------------- --------------- ----------- |
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c_args [] Extra arguments passed to the C compiler |
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c_link_args [] Extra arguments passed to the C linker |
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c_std c99 [none, c89, c99, c11, gnu89, gnu99, gnu11] C language standard to use |
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cpp_args [] Extra arguments passed to the C++ compiler |
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cpp_debugstl false [true, false] STL debug mode |
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cpp_link_args [] Extra arguments passed to the C++ linker |
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cpp_std c++11 [none, c++98, c++03, c++11, c++14, c++17, c++1z, c++2a, gnu++03, gnu++11, gnu++14, gnu++17, gnu++1z, gnu++2a] C++ language standard to use |
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Directories: |
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Option Current Value Description |
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------ ------------- ----------- |
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bindir bin Executable directory |
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datadir share Data file directory |
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includedir include Header file directory |
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infodir share/info Info page directory |
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libdir lib/x86_64-linux-gnu Library directory |
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libexecdir libexec Library executable directory |
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localedir share/locale Locale data directory |
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localstatedir /var/local Localstate data directory |
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mandir share/man Manual page directory |
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prefix /usr/local Installation prefix |
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sbindir sbin System executable directory |
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sharedstatedir /var/local/lib Architecture-independent data directory |
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sysconfdir etc Sysconf data directory |
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Project options: |
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Option Current Value Possible Values Description |
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------ ------------- --------------- ----------- |
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array_opt [one, two] [one, two, three] array_opt |
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combo_opt three [one, two, three] combo_opt |
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free_array_opt [one, two] free_array_opt |
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integer_opt 3 >=0, <=5 integer_opt |
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other_one false [true, false] other_one |
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some_feature enabled [enabled, disabled, auto] some_feature |
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someoption optval An option |
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Testing options: |
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Option Current Value Possible Values Description |
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------ ------------- --------------- ----------- |
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errorlogs true [true, false] Whether to print the logs from failing tests |
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stdsplit true [true, false] Split stdout and stderr in test logs |
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These are all the options available for the current project arranged |
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into related groups. The first column in every field is the name of |
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the option. To set an option you use the `-D` option. For example, |
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changing the installation prefix from `/usr/local` to `/tmp/testroot` |
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you would issue the following command. |
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meson configure -Dprefix=/tmp/testroot |
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Then you would run your build command (usually `ninja`), which would |
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cause Meson to detect that the build setup has changed and do all the |
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work required to bring your build tree up to date. |
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Since 0.50.0, it is also possible to get a list of all build options |
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by invoking `meson configure` with the project source directory or |
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the path to the root `meson.build`. In this case, meson will print the |
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default values of all options similar to the example output from above.
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