unable to infer tagged configuration

[Dominic Fandrey]

A lot of ports currently break with spaces in CC, e.g. audio/flac
or multimedia/libtheora, they seem to be using gnome-libtool:

if /bin/sh /usr/local/bin/libtool --mode=compile env CCACHE_PREFIX=/usr/local/bin/distcc /usr/local/bin/ccache cc -DHAVE_CONFIG_H -I. -I. -I../..    -DFLaC__INLINE=__inline__ -DNDEBUG -I../.. -I./include -I../../include -I/usr/obj/mobileKamikaze.norad/amd64/usr/ports/audio/flac/work/flac-1.2.1/include -I/usr/local/include   -I/usr/local/include -Wall -W -O2 -pipe -march=nocona -fno-strict-aliasing -MT bitwriter.lo -MD -MP -MF ".deps/bitwriter.Tpo"  -c -o bitwriter.lo `test -f 'bitwriter.c' || echo './'`bitwriter.c;  then mv -f ".deps/bitwriter.Tpo" ".deps/bitwriter.Plo";  else rm -f ".deps/bitwriter.Tpo"; exit 1;  fi
libtool: compile: unable to infer tagged configuration
libtool: compile: specify a tag with `--tag'
*** Error code 1
libtool: compile: unable to infer tagged configuration
libtool: compile: specify a tag with `--tag'
libtool: compile: unable to infer tagged configuration
libtool: compile: specify a tag with `--tag'
*** Error code 1
*** Error code 1
3 errors
*** Error code 1
1 error
*** Error code 1
1 error
*** Error code 1
1 error
*** Error code 2
1 error
*** Error code 1

Stop in /usr/ports/audio/flac.