SCons provides a number of ways that allow the writer of the SConscript files to give users a great deal of control over how to run the builds.
Users may find themselves supplying
the same command-line options every time
they run SCons.
For example, a user might find that it saves time
to specify a value of -j 2
to run the builds in parallel.
To avoid having to type -j 2 by hand
you can set the external environment variable
SCONSFLAGS to a string containing
command-line options that you want SCons to use.
If, for example,
you're using a POSIX shell that's
compatible with the Bourne shell,
and you always want SCons to use the
you can set the
environment as follows:
% scons scons: Reading SConscript files ... scons: done reading SConscript files. scons: Building targets ... ... [build output] ... scons: done building targets. % export SCONSFLAGS="-Q" % scons ... [build output] ...
Users of csh-style shells on POSIX systems
can set the
SCONSFLAGS environment as follows:
$ setenv SCONSFLAGS "-Q"
Windows users may typically want to set the
SCONSFLAGS in the appropriate tab of the
System Properties window.