[proaudio] media-sound/sonic-visualiser-1.2 build fails on x86-64

["Anders Dahnielson" <anders@xxxxxxxxxxxxxx>]

The build adds a second "--march" specifying "pentium3" despite there already being one from my make.conf specifying "nocona". Error message:

make[1]: Entering directory `/var/tmp/portage/media-sound/sonic-visualiser-1.2/work/sonic-visualiser-1.2/audioio'
g++ -c -pipe -D'RUBBERBAND_VERSION="1.0"' -D'FFTW3F_VERSION="3.1.2"' -D'SAMPLERATE_VERSION="0.1.2"' -D'JACK_VERSION="0.109.0"' -march=nocona -O2 -pipe -DNDEBUG -DNO_TIMING -O3 -march=pentium3 -msse -mmmx -DBUILD_RELEASE -D'SVNREV="exported"' -Wall -W -D_REENTRANT -fPIC -DHAVE_BZ2 -DHAVE_RUBBERBAND -DHAVE_FFTW3F -DHAVE_SAMPLERATE -DHAVE_JACK -DQT_NO_DEBUG -DQT_GUI_LIB -DQT_CORE_LIB -DQT_SHARED -I/usr/share/qt4/mkspecs/linux-g++ -I. -I/usr/include/qt4/QtCore -I/usr/include/qt4/QtCore -I/usr/include/qt4/QtGui -I/usr/include/qt4/QtGui -I/usr/include/qt4 -I. -I.. -Itmp_moc -I. -o tmp_obj/AudioCallbackPlaySource.o AudioCallbackPlaySource.cpp
AudioCallbackPlaySource.cpp:1: error: CPU you selected does not support x86-64 instruction set
AudioCallbackPlaySource.cpp:1: error: CPU you selected does not support x86-64 instruction set

-- 
Anders Dahnielson
<anders@xxxxxxxxxxxxxx>