Rscons User Guide - 4.3.2 Construction Variables

4.3.2 Construction Variables

Construction variables are values assigned to keys within an Environment. Construction variables are used by Builders to produce output files. See Default Construction Variables for a reference of all built-in construction variables.

Example:

env do |env|
  env["CCFLAGS"] += %w[-O2 -Wall]
  env["LIBS"] += %w[m]
end

This example modifies the CCFLAGS construction variable to add -O2 and -Wall to the compilation commands used for C and C++ source files. It also instructs the linker to link against the m library.

4.3.2.1 Construction Variable Naming

uppercase strings - the default construction variables that Rscons uses
strings beginning with "_" - set and used internally by builders
lowercase strings with a ":" as "#{taskname}:#{parametername}" - set to task parameter values
symbols, lowercase strings - reserved as user-defined construction variables

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