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45 lines
1.6 KiB
ReStructuredText
45 lines
1.6 KiB
ReStructuredText
.. _environment_variables:
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================================================
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Environment Variables Impacting the Build System
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================================================
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Various environment variables have an impact on the behavior of the
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build system. This document attempts to document them.
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AUTOCLOBBER
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If defines, the build system will automatically clobber as needed.
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The default behavior is to print a message and error out when a
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clobber is needed.
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This variable is typically defined in a :ref:`mozconfig <mozconfig>`
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file via ``mk_add_options``.
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REBUILD_CHECK
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If defined, the build system will print information about why
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certain files were rebuilt.
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This feature is disabled by default because it makes the build slower.
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MACH_NO_TERMINAL_FOOTER
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If defined, the terminal footer displayed when building with mach in
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a TTY is disabled.
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MACH_NO_WRITE_TIMES
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If defined, mach commands will not prefix output lines with the
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elapsed time since program start. This option is equivalent to
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passing ``--log-no-times`` to mach.
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MOZ_PSEUDO_DERECURSE
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Activate an *experimental* build mode where make directory traversal
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is derecursified. This mode should result in faster build times at
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the expense of busted builds from time-to-time. The end goal is for
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this build mode to be the default. At which time, this variable will
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likely go away.
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A value of ``1`` activates the mode with full optimizations.
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A value of ``no-parallel-export`` activates the mode without
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optimizations to the *export* tier, which are known to be slightly
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buggy.
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