***** aclocal ***** ***** PWD: /var/tmp/portage/media-sound/cava-0.10.2/work/cava-0.10.2 ***** aclocal -I m4 --system-acdir=/var/tmp/portage/media-sound/cava-0.10.2/temp/aclocal configure.ac:306: error: _AX_CHECK_GL_MANUAL_LIBS_GENERIC: argument must not be empty lib/m4sugar/m4sh.m4:690: _AS_IF_ELSE is expanded from... lib/m4sugar/m4sh.m4:697: AS_IF is expanded from... /usr/share/aclocal/ax_check_gl.m4:187: _AX_CHECK_GL_MANUAL_LIBS_GENERIC is expanded from... lib/m4sugar/m4sh.m4:595: AS_CASE is expanded from... /usr/share/aclocal/ax_check_gl.m4:253: AX_CHECK_GL is expanded from... lib/m4sugar/m4sh.m4:697: AS_IF is expanded from... lib/m4sugar/m4sh.m4:697: AS_IF is expanded from... configure.ac:306: the top level autom4te-2.72: error: /usr/bin/m4 failed with exit status: 1 aclocal-1.16: error: autom4te failed with exit status: 1