build fails with "ar: no archive members specified"

[Ben Abbott]

Anyone else seeing this?

I tried a maintainer clean, autogen.sh, configure ..., and make, but this error 
is still present for me.

/bin/sh ../libtool --tag=CC   --mode=link /opt/local/bin/gcc-mp-4.5  -pipe -O0 
-g -m64 -ggdb3 -gstabs -D_THREAD_SAFE -funroll-loops -lstdc++ -D_THREAD_SAFE 
-pthread  -headerpad_max_install_names -D_THREAD_SAFE -L/opt/local/lib -o 
src/libgui-src.la    -lm  
libtool: link: ar cru src/.libs/libgui-src.a 
ar: no archive members specified
usage:  ar -d [-TLsv] archive file ...
        ar -m [-TLsv] archive file ...
        ar -m [-abiTLsv] position archive file ...
        ar -p [-TLsv] archive [file ...]
        ar -q [-cTLsv] archive file ...
        ar -r [-cuTLsv] archive file ...
        ar -r [-abciuTLsv] position archive file ...
        ar -t [-TLsv] archive [file ...]
        ar -x [-ouTLsv] archive [file ...]

Ben