Mine

gcc -DHAVE_CONFIG_H -I. -I. -I.. -I.. -DG_LOG_DOMAIN=\"GLib\" -DG_DISABLE_CAST_CHECKS -DG_DISABLE_DEPRECATED -DGLIB_COMPILATION -pthread -march=k8 -O2 -pipe -Wall -MT gatomic.lo -MD -MP -MF .deps/gatomic.Tpo -c gatomic.c  -fPIC -DPIC -o .libs/gatomic.o 
  gcc -DHAVE_CONFIG_H -I. -I. -I.. -I.. -DG_LOG_DOMAIN=\"GLib\" -DG_DISABLE_CAST_CHECKS -DG_DISABLE_DEPRECATED -DGLIB_COMPILATION -pthread -march=k8 -O2 -pipe -Wall -MT garray.lo -MD -MP -MF .deps/garray.Tpo -c garray.c  -fPIC -DPIC -o .libs/garray.o 
  gcc -DHAVE_CONFIG_H -I. -I. -I.. -I.. -DG_LOG_DOMAIN=\"GLib\" -DG_DISABLE_CAST_CHECKS -DG_DISABLE_DEPRECATED -DGLIB_COMPILATION -pthread -march=k8 -O2 -pipe -Wall -MT gasyncqueue.lo -MD -MP -MF .deps/gasyncqueue.Tpo -c gasyncqueue.c  -fPIC -DPIC -o .libs/gasyncqueue.o 
 {standard input}: Assembler messages: 
 {standard input}:61: Error: Incorrect register `%rdx' used with `l' suffix 
 make[4]: *** [gatomic.lo] Error 1 
 make[4]: *** Waiting for unfinished jobs.... 
 make[4]: Leaving directory `/var/tmp/portage/glib-2.8.6/work/glib-2.8.6/glib' 
 make[3]: *** [all-recursive] Error 1 
 make[3]: Leaving directory `/var/tmp/portage/glib-2.8.6/work/glib-2.8.6/glib' 
 make[2]: *** [all] Error 2 
 make[2]: Leaving directory `/var/tmp/portage/glib-2.8.6/work/glib-2.8.6/glib' 
 make[1]: *** [all-recursive] Error 1 
 make[1]: Leaving directory `/var/tmp/portage/glib-2.8.6/work/glib-2.8.6' 
 make: *** [all] Error 2