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Table of Contents
Immediately upon starting, the Boost.Build engine (b2)
loads the Jam code that implements the build system. To do this, it searches for a file
called boost-build.jam, first in the invocation directory, then
in its parent and so forth up to the filesystem root, and finally
in the directories specified by the environment variable
BOOST_BUILD_PATH. When found, the file is interpreted, and should
specify the build system location by calling the boost-build
rule:
rule boost-build ( location ? )
If location is a relative path, it is treated as relative to
the directory of boost-build.jam. The directory specified by
that location and the directories in BOOST_BUILD_PATH are then searched for
a file called bootstrap.jam, which is expected to
bootstrap the build system. This arrangement allows the build
system to work without any command-line or environment variable
settings. For example, if the build system files were located in a
directory "build-system/" at your project root, you might place a
boost-build.jam at the project root containing:
boost-build build-system ;
In this case, running b2 anywhere in the project tree will automatically find the build system.
The default bootstrap.jam, after loading some standard
definitions, loads two site-config.jam and user-config.jam.