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Searching Directories for Prerequisites
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   For large systems, it is often desirable to put sources in a separate
directory from the binaries.  The "directory search" features of `make'
facilitate this by searching several directories automatically to find
a prerequisite.  When you redistribute the files among directories, you
do not need to change the individual rules, just the search paths.

General Search

Specifying a search path that applies

to every prerequisite.

Selective Search

Specifying a search path

for a specified class of names.

Search Algorithm

When and how search paths are applied.

Commands/Search

How to write shell commands that work together

with search paths.

Implicit/Search

How search paths affect implicit rules.

Libraries/Search

Directory search for link libraries.