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* configure: Add support for 'subdirs' variable, which is

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like 'configdirs', except that configure doesn't re-invoke
	itself for subdirs, it just creates a Makefile for each subdir.
	* configure.texi:  Document subdirs.
This commit is contained in:
Per Bothner
1992-04-14 19:02:48 +00:00
parent 13b5a7ff3e
commit 8becd045a3
3 changed files with 254 additions and 172 deletions
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27
configure.texi
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@ -983,13 +983,30 @@ error message.
@defvar{configdirs}
Contains the names of any subdirectories where @code{configure} should
recur. You must usually set this in the per-invocation section of
@file{configure.in}. If @file{Makefile.in} contains a line starting
with @code{SUBDIRS =}, then it will be replaced with an assignment to
@code{SUBDIRS} using the value of @code{configdirs}. This can be used
to determine which directories to configure and build depending on the
host and target configurations.
@file{configure.in}.
If @file{Makefile.in} contains a line starting with @code{SUBDIRS =},
then it will be replaced with an assignment to @code{SUBDIRS} using
the value of @code{configdirs} (if #code{subdirs} is empty). This can
be used to determine which directories to configure and build depending
on the host and target configurations.
@c Most other matching makefile/config vars use the same name. Why not
@c this? (FIXME).
@c Can we get rid of SUBDIRS-substitution? It doesn't work well with subdirs.
Use @code{configdirs} (instead of the @code{subdirs} variable
described below) if you want to be able to partition the
sub-directories, or use independent Makefile fragments.
Each sub-directory can be independent, and independently re-configured.
@end defvar
@defvar{subdirs}
Contains the names of any subdirectories where @code{configure} should
create a @code{Makefile} (in addition to the current directory),
@emph{without} recursively running @code{configure}.
Use @code{subdirs} (instead of the @code{configdirs} variable
described above) if you want to configure all of the directories
as a unit. Since there is a single invocation of @code{configure}
that configures many directories, all the directories can use the
same Makefile fragments, and the same @code{configure.in}.
@end defvar
@defvar{host}