Re: AFFECTS: 10-CURRENT users with any port depending on converters/libiconv

While proceeding in the iconv-mess, I run into a very nasty situation
with some ports showing strange linker errors on most recent systems.

The symptoms are present on boxes with CURRENT > r255259, for instance,
the error below is taken from a box which has already compiled the port
in question successfully, but then I recompiled world, installed world
and proceeded this morning with the port's updating mess. And the boxes
in question are at

FreeBSD 10.0-CURRENT #2 r255356: Sat Sep  7 13:04:03 CEST 2013 amd64

Those machines I maintain all use the very same /etc/src.conf and
settings there, so issues with libc++11 et cetera must then related to
the different OS revision.

I see qt4-scripts and kdelibs4 failing with some strange undefined
references to 'swap' in c++ classes, as well as several very severe
prerequisits for kdevelop (I do not use KDE, so I simply have the
kdevelopp stuff amongst necessary ports). Below the failing port
textproc/libxml++26 which fails on r255356, but not on the box with
r255259.

On the failing system, I'm able to compile the port devel/glibmm.


[...]
libtool: link: c++ -Wall -O2 -pipe -O3 -march=native
-fno-strict-aliasing -o
examples/dom_parse_entities/.libs/dom_parse_entities
examples/dom_parse_entities/main.o  libxml++/.libs/libxml++-2.6.so
-L/usr/local/lib /usr/local/lib/libxml2.so -L/usr/lib -lz -llzma
-lm /usr/local/lib/libglibmm-2.4.so /usr/local/lib/libgmodule-2.0.so /usr/local/lib/libgobject-2.0.so /usr/local/lib/libffi.so /usr/local/lib/libglib-2.0.so
-licui18n /usr/local/lib/libpcre.so /usr/local/lib/libintl.so /usr/local/lib/libsigc-2.0.so
-pthread -Wl,-rpath -Wl,/usr/local/lib libtool: link: c++ -Wall -O2
-pipe -O3 -march=native -fno-strict-aliasing -o
examples/dom_build/.libs/dom_build examples/dom_build/main.o
libxml++/.libs/libxml++-2.6.so
-L/usr/local/lib /usr/local/lib/libxml2.so -L/usr/lib -lz -llzma
-lm /usr/local/lib/libglibmm-2.4.so /usr/local/lib/libgmodule-2.0.so /usr/local/lib/libgobject-2.0.so /usr/local/lib/libffi.so /usr/local/lib/libglib-2.0.so
-licui18n /usr/local/lib/libpcre.so /usr/local/lib/libintl.so /usr/local/lib/libsigc-2.0.so
-pthread -Wl,-rpath -Wl,/usr/local/lib /usr/local/lib/libglibmm-2.4.so:
undefined reference to
`sigc::internal::signal_impl::erase(std::__1::__list_iterator<sigc::slot_base,
void*>)' /usr/local/lib/libglibmm-2.4.so: undefined reference to
`sigc::internal::signal_impl::insert(std::__1::__list_iterator<sigc::slot_base,
void*>, sigc::slot_base const&)' /usr/local/lib/libglibmm-2.4.so:
undefined reference to
`sigc::internal::signal_impl::erase(std::__1::__list_iterator<sigc::slot_base,
void*>)/usr/local/lib/libglibmm-2.4.so: undefined reference to
`sigc::internal::signal_impl::erase(std::__1::__list_iterator<sigc::slot_base,
void*>)'
' /usr/local/lib/libglibmm-2.4.so: /usr/local/lib/libglibmm-2.4.so:
undefined reference to
`sigc::internal::signal_impl::insert(std::__1::__list_iterator<sigc::slot_base,
void*>, sigc::slot_base const&)' undefined reference to
`sigc::internal::signal_impl::insert(std::__1::__list_iterator<sigc::slot_base,
void*>, sigc::slot_base const&)' c++: error: linker command failed with
exit code 1 (use -v to see invocation) gmake[2]: ***
[examples/dom_parser/dom_parser] Error 1 gmake[2]: *** Waiting for
unfinished jobs.... c++: error: linker command failed with exit code 1
(use -v to see invocation) c++: error: linker command failed with exit
code 1 (use -v to see invocation) gmake[2]: ***
[examples/dom_parse_entities/dom_parse_entities] Error 1 gmake[2]: ***
[examples/dom_build/dom_build] Error 1 gmake[2]: Leaving directory
`/usr/ports/textproc/libxml++26/work/libxml++-2.34.2' gmake[1]: ***
[all] Error 2 gmake[1]: Leaving directory
`/usr/ports/textproc/libxml++26/work/libxml++-2.34.2' ===> Compilation
failed unexpectedly. Try to set MAKE_JOBS_UNSAFE=yes and rebuild before
reporting the failure to the maintainer. *** Error code 1

Stop.
make: stopped in /usr/ports/textproc/libxml++26

===>>> make failed for textproc/libxml++26
===>>> Aborting update

===>>> Update for textproc/libxml++26 failed
===>>> Aborting update

===>>> Killing background jobs
Terminated

===>>> You can restart from the point of failure with this command line:
       portmaster <flags> x11-toolkits/pangomm textproc/libxml++26 

===>>> Exiting