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Add new --trace[=MODE] flags, with --trace=dir

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This mode replaces the previous heuristic setting enabled with -O, where we
would log directory enter/leave for each synchronized output.  Now we only
do that if --trace=dir is given.
This commit is contained in:
Paul Smith
2013-05-13 01:30:24 -04:00
parent 5367d393dd
commit 381baeef7a
9 changed files with 102 additions and 36 deletions
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19
doc/make.texi
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@@ -8730,7 +8730,8 @@ With no type or the type @samp{target}, output from the entire recipe
of each target is grouped together. With the type @samp{line}, output
from each line in the recipe is grouped together. With the type
@samp{recurse}, the output from an entire recursive make is grouped
together. @xref{Parallel Output, ,Output During Parallel Execution}.
together. With the type @samp{none}, no output synchronization is
performed. @xref{Parallel Output, ,Output During Parallel Execution}.
@item -q
@cindex @code{-q}
@@ -8803,13 +8804,17 @@ instead of running their recipes. This is used to pretend that the
recipes were done, in order to fool future invocations of
@code{make}. @xref{Instead of Execution, ,Instead of Executing Recipes}.
@item --trace
@item --trace[=@var{mode}]
@cindex @code{--trace}
@c Extra blank line here makes the table look better.
Print the entire recipe to be executed, even for recipes that are
normally silent (due to @code{.SILENT} or @samp{@@}). Also print the
makefile name and line number where the recipe was defined.
Show tracing information for @code{make} execution. With no mode or
the type @samp{rule}, print the entire recipe to be executed, even for
recipes that are normally silent (due to @code{.SILENT} or @samp{@@}).
Also print the makefile name and line number where the recipe was
defined, and information on why the target is being rebuilt. With the
type @samp{dir}, directory enter/leave lines are shown around each
synchronized output segment. These modes are cumulative and can be
set with multiple instances of the @code{--trace} flag. With the type
@samp{none}, all tracing is disabled.
@item -v
@cindex @code{-v}