diff options
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/make.texi | 32 |
1 files changed, 17 insertions, 15 deletions
diff --git a/doc/make.texi b/doc/make.texi index e004984..ce8e07b 100644 --- a/doc/make.texi +++ b/doc/make.texi @@ -8616,26 +8616,28 @@ The data base output contains file name and line number information for recipe and variable definitions, so it can be a useful debugging tool in complex environments. -@item -O +@item -O[@var{type}] @cindex @code{-O} -@itemx --output-sync +@itemx --output-sync[=@var{type}] @cindex @code{--output-sync} -@cindex output of parallel execution -@cindex parallel execution, output of +@cindex output during parallel execution +@cindex parallel execution, output during Ensure that the complete output from each recipe is printed in one uninterrupted sequence. This option is only useful when using the @code{--jobs} option to run multiple recipes simultaneously -(@pxref{Parallel, ,Parallel Execution}). Without this option output -will be displayed as it is generated by the recipes. - -With no argument or the argument @samp{1}, messages from each job in -recursive makes are grouped together. With the argument @samp{2}, the -complete output from any recursive make is grouped together. The latter -achieves better grouping of output from related jobs, but causes longer -delay, since messages do not appear until the recursive make has -completed. Therefore @samp{-O} is more useful when watching the output -while make runs, and @samp{-O2} is better suited when running a complex -parallel build in the background and checking its output afterwards. +(@pxref{Parallel, ,Parallel Execution}) Without this option output +will be displayed as it is generated by the recipes.@refill + +With no type or the type @samp{target}, output from each individual +target is grouped together. With the type @samp{make}, the output +from an entire recursive make is grouped together. The latter +achieves better grouping of output from related jobs, but causes +longer delay since messages do not appear until the entire recursive +make has completed (this does not increase the total build time, +though). In general @samp{target} mode is useful when watching the +output while make runs, and @samp{make} mode is useful when running a +complex parallel build in the background and checking its output +afterwards. @item -q @cindex @code{-q} |