diff options
Diffstat (limited to 'make.texinfo')
| -rw-r--r-- | make.texinfo | 23 |
1 files changed, 20 insertions, 3 deletions
diff --git a/make.texinfo b/make.texinfo index bb74eb9..911127e 100644 --- a/make.texinfo +++ b/make.texinfo @@ -5514,6 +5514,19 @@ find out which files are out of date without changing them. By giving arguments when you run @code{make}, you can do any of these things and many others. +The exit status of @code{make} is always one of three values: +@table @code +@item 0 +The exit status is zero if @code{make} is successful. +@item 2 +The exit status is two if @code{make} encounters any errors. +It will print messages describing the particular errors. +@item 1 +The exit status is one if you use the @samp{-q} flag and @code{make} +determines that some target is not already up to date. +@xref{Instead of Execution, ,Instead of Executing the Commands}. +@end table + @menu * Makefile Arguments:: How to specify which makefile to use. * Goals:: How to use goal arguments to specify which @@ -5734,7 +5747,10 @@ the program @code{touch}. It does the work directly. With the @samp{-q} flag, @code{make} prints nothing and executes no commands, but the exit status code it returns is zero if and only if the -targets to be considered are already up to date. +targets to be considered are already up to date. If the exit status is +one, then some updating needs to be done. If @code{make} encounters an +error, the exit status is two, so you can distinguish an error from a +target that is not up to date. It is an error to use more than one of these three flags in the same invocation of @code{make}. @@ -6064,8 +6080,9 @@ trying to remake any files, use @w{@samp{make -p -f /dev/null}}. @cindex @code{--question} ``Question mode''. Do not run any commands, or print anything; just return an exit status that is zero if the specified targets are already -up to date, nonzero otherwise. @xref{Instead of Execution, ,Instead of -Executing the Commands}.@refill +up to date, one if any remaking is required, or two if an error is +encountered. @xref{Instead of Execution, ,Instead of Executing the +Commands}.@refill @item -r @cindex @code{-r} |