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Roland McGrath 1992-06-26 00:58:23 +00:00
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@ -1435,7 +1435,8 @@ Thus, if a files that is listed as a dependency does not exist in the
current directory, @code{make} searches the directories listed in current directory, @code{make} searches the directories listed in
@code{VPATH} for a file with that name. If a file is found in one of @code{VPATH} for a file with that name. If a file is found in one of
them, that file becomes the dependency. Rules may then specify the them, that file becomes the dependency. Rules may then specify the
names of source files as if they all existed in the current directory. names of source files in the dependencies as if they all existed in the
current directory.
In the @code{VPATH} variable, directory names are separated by colons. In the @code{VPATH} variable, directory names are separated by colons.
The order in which directories are listed is the order followed by The order in which directories are listed is the order followed by
@ -1482,7 +1483,7 @@ There are three forms of the @code{vpath} directive:
@table @code @table @code
@item vpath @var{pattern} @var{directories} @item vpath @var{pattern} @var{directories}
Specify the search path @var{directories} for file names that match Specify the search path @var{directories} for file names that match
@code{pattern}. If another path was previously specified for the same @var{pattern}. If another path was previously specified for the same
pattern, the new path is effectively appended to the old path.@refill pattern, the new path is effectively appended to the old path.@refill
The search path, @var{directories}, is a colon-separated list of The search path, @var{directories}, is a colon-separated list of
@ -1570,8 +1571,10 @@ foo.o : foo.c defs.h hack.h
@noindent @noindent
@c !!! following paragraph rewritten to avoid overfull hbox @c !!! following paragraph rewritten to avoid overfull hbox
In this example, the value of @samp{$^} would be a value such as In this example, the value of @samp{$^} would be a value such as
@samp{src/foo.c ../headers/defs.h hack.h}; you would use @samp{src/foo.c ../headers/defs.h hack.h}; you would use
@samp{$(firstword $^)} to extract just @samp{src/foo.c}.@refill @samp{$(firstword $^)} to extract just @samp{src/foo.c}. Since you want
to do this so often, the automatic variable @code{$<} is always the
first dependency, the same as @samp{$(firstword $^)}.@refill
@node Implicit/Search, Libraries/Search, Commands/Search, Directory Search @node Implicit/Search, Libraries/Search, Commands/Search, Directory Search
@subsection Directory Search and Implicit Rules @subsection Directory Search and Implicit Rules