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Changed `Features' chapter, giving credit to some

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people who may have invented some things.
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Roland McGrath 1988-07-10 00:51:51 +00:00
parent bf81164407
commit 2153102725
1 changed files with 10 additions and 23 deletions
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@ -4628,7 +4628,7 @@ Execution of recursive commands to run @code{make} via the variable
@item
Support for suffix @samp{.a} in suffix rules. In GNU @code{make},
this is actually implemented by chaining with one pattern rule for
this is actually implemented by changing with one pattern rule for
installing members in an archive. @xref{Chained Rules}.@refill
@item
@ -4643,18 +4643,7 @@ don't recall:
@itemize @bullet
@item
Pattern rules using @samp{%}.
This has been implemented in several versions of @code{make}.
We're not sure who invented it first, but it's been spread around a bit.
@xref{Pattern Rules}.@refill
@item
Rule chaining and implicit intermediate files.
This was implemented by Stu Feldman in his version of @code{make}
for AT&T Eighth Edition Research Unix, and later by Andrew Hume of
AT&T Bell Labs in his @code{mk} program. We don't really know if
we got this from either of them or thought it up ourselves at the
same time. @xref{Chained Rules}.
Pattern rules using @samp{%}. @xref{Pattern Rules}.
@item
The automatic variable @code{$^} containing a list of all dependencies
@ -4683,9 +4672,7 @@ Verbatim variable definitions made with @code{define}. @xref{Defining}.
@item
Phony targets declared with the special target @code{.PHONY}.
A similar feature with a different syntax was implemented by
Andrew Hume of AT&T Bell Labs in his @code{mk} program. This
seems to be a case of parallel discovery. @xref{Phony Targets}.
@xref{Phony Targets}.
@item
Text manipulation by calling functions. @xref{Functions}.
@ -4695,11 +4682,7 @@ The @samp{-o} option to pretend a file's modification-time is old.
@xref{Avoid Compilation}.
@item
Conditional execution.
This has been implemented numerous times in various versions of
@code{make}; it seems a natural extension derived from the features
of the C preprocessor and similar macro languages and is not a
revolutionary concept. @xref{Conditionals}.
Conditional execution. @xref{Conditionals}.
@item
Included makefiles never determine the default goal.
@ -4728,6 +4711,9 @@ any characters. In other version of @code{make}, they must begin with
The variable @code{MAKELEVEL} which keeps track of the current level
of @code{make} recursion. @xref{Recursion}.
@item
Rule chaining and implicit intermediate files. @xref{Chained Rules}.
@item
Static pattern rules. @xref{Static Pattern}.
@ -4792,8 +4778,9 @@ $(targets): %: %.o lib.a
In System V and 4.3 BSD @code{make}, files found by @code{VPATH} search
(@pxref{Directory Search}) have their names changed inside command strings.
We feel it is much cleaner to always use automatic variables and thus
obviate the need for this feature. We are still debating whether to
implement this to be compatible or to leave it out to avoid such ugliness.
obviate the need for this feature. However, this feature may be
implemented in the near future for the sake of compatibility. (In fact, it
may be implemented before anyone but the author reads this paragraph.)
@end itemize
@node Concept Index, Name Index, Missing, Top