On 10/09/2014 01:14 PM, Eric Blake wrote: > On 10/09/2014 12:47 PM, Eric Blake wrote: > >>> git clone git://git.debian.org/git/collab-maint/pkg-util-linux.git >>> util-linux >>> cd util-linux >>> git checkout v2.20.1 >>> ./autogen.sh >>> autopoint: /usr/bin/autopoint (GNU gettext-tools) 0.19.2 > > Okay, I am repeating the setup on my Fedora 20 system, with autopoint > 0.18.3 and m4 1.4.16; and I can reproduce that running 'autopoint > --force' is the step in ./autogen.sh that causes m4 to run away with > memory. At this point, I'm suspecting an autopoint bug. > >> >> Most likely, this is not a memory leak in m4, so much as a bug in >> util-linux' configure.ac that is causing m4 to go into an infinite loop. > > Or something in the way autopoint is running m4.
In particular, autom4te --verbose shows this is the runaway command line: /usr/bin/m4 --nesting-limit=1024 --gnu --include=/usr/share/autoconf --debug=aflq --fatal-warning --debugfile=/tmp/am4tSXlU7J/traces.0t --trace=AM_GNU_GETTEXT_VERSION --trace=_m4_warn --trace=include --trace=m4_include --trace=m4_pattern_allow --trace=m4_pattern_forbid --reload-state=/usr/share/autoconf/autoconf/autoconf.m4f --undefine=__m4_version__ - configure.ac > /tmp/am4tSXlU7J/output.0t where stdin is fed the following prepended to configure.ac: echo '\ dnl disable macros which may abort autom4te m4_undefine([m4_assert]) m4_undefine([m4_fatal]) m4_undefine([m4_warn]) m4_undefine([m4_errprintn]) m4_undefine([m4_exit]) m4_undefine([m4_include]) m4_undefine([m4_esyscmd]) dnl macros which needs to be traced without aclocal.m4 m4_define([AM_GNU_GETTEXT], []) m4_define([AM_GNU_GETTEXT_VERSION], []) ' I bet if you downgrade to gettext 0.17, that things work again (it was gettext 0.18 that tried to switch to an m4 trace run rather than a grep for learning about the existence of gettext macros embedded in configure.ac). I'm still not easily seeing the inf-loop in all of that, though. -- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org
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