GNU bug report logs - #13962
24.3: build fails when make run as a sub-make process

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: balducci <at> units.it
Subject: bug#13962: closed (Re: 24.3: build fails when make run as a
 sub-make process)
Date: Mon, 18 Mar 2013 21:07:03 +0000

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Your bug report

#13962: 24.3: build fails when make run as a sub-make process

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 13962 <at> debbugs.gnu.org.

-- 
13962: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=13962
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

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From: Paul Eggert <eggert <at> cs.ucla.edu>
To: 13962-done <at> debbugs.gnu.org
Subject: Re: 24.3: build fails when make run as a sub-make process
Date: Mon, 18 Mar 2013 14:04:31 -0700

Thanks for the report and idea for a fix.
I installed a MAKELEVEL=0 fix into trunk bzr 112086
and am marking this as done.

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From: balducci <at> units.it
To: bug-gnu-emacs <at> gnu.org
Subject: 24.3: build fails when make run as a sub-make process
Date: Thu, 14 Mar 2013 19:07:33 +0100

hello,

while building 24.3 I stumbled on the following problem.

The main Makefile contains the following two lines:


   info_misc=`cd $${thisdir}/doc/misc; ${MAKE} -s echo-info`; \

   (info_misc=`cd doc/misc; ${MAKE} -s echo-info`; \

Everything works nicely if I run make from the shell prompt.

However, I usually build emacs with a script which in turn is run from
a Makefile of mine. If I attempt to build this way, I find
that the definitions of info_misc above contain also the make messages
"Entering directory..." "Leaving directory...", which, of course,
break the build.

The problem is that -s suppresses recipe lines echoing, but NOT
directory change messages from make, which make emits when run in a
sub-make process (which is why I do not get errors when runnig from the
shell prompt, while I get errors when running from my script, run by 
make)

The above lines assume that the main Makefile will never be run by a
sub-make, which of course is true most of the time, but is false in my
case.

Everything is fixed joining --no-print-directory with the -s option, but,
as I was told by paul smith on the help-make mail list, that won't work
for non-GNU make. Following paul's suggestion, I propose:

=> use of MAKELEVEL=0, so that GNU make thinks to be a top-most level:
      info_misc=`cd doc/misc && MAKELEVEL=0 ${MAKE} -s echo-info`
   while other make's won't be disturbed
=> sed-ing the ${MAKE} -s echo-info command to strip off any spurios
   directory change message

Apologies if I have overlooked something

and thank you really very much for maintaining and developing emacs


ciao
gabriele

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