The Tor Browser: build/docs/environment-variables.rst@6474c204b198

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     1 .. _environment_variables:

     3 ================================================

     4 Environment Variables Impacting the Build System

     5 ================================================

     7 Various environment variables have an impact on the behavior of the

     8 build system. This document attempts to document them.

    10 AUTOCLOBBER

    11    If defines, the build system will automatically clobber as needed.

    12    The default behavior is to print a message and error out when a

    13    clobber is needed.

    15    This variable is typically defined in a :ref:`mozconfig <mozconfig>`

    16    file via ``mk_add_options``.

    18 REBUILD_CHECK

    19    If defined, the build system will print information about why

    20    certain files were rebuilt.

    22    This feature is disabled by default because it makes the build slower.

    24 MACH_NO_TERMINAL_FOOTER

    25    If defined, the terminal footer displayed when building with mach in

    26    a TTY is disabled.

    28 MACH_NO_WRITE_TIMES

    29    If defined, mach commands will not prefix output lines with the

    30    elapsed time since program start. This option is equivalent to

    31    passing ``--log-no-times`` to mach.

    33 MOZ_PSEUDO_DERECURSE

    34    Activate an *experimental* build mode where make directory traversal

    35    is derecursified. This mode should result in faster build times at

    36    the expense of busted builds from time-to-time. The end goal is for

    37    this build mode to be the default. At which time, this variable will

    38    likely go away.

    40    A value of ``1`` activates the mode with full optimizations.

    42    A value of ``no-parallel-export`` activates the mode without

    43    optimizations to the *export* tier, which are known to be slightly

    44    buggy.

    46    A value of ``no-skip`` activates the mode without optimizations to skip

    47    some directories during traversal.

    49    Values may be combined with a comma.

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