* configure.in (i[34]86-*-solaris2*): Use config/mh-sysv4.
i[34]86-ncr-sysv4*) host_makefile_frag=config/mh-ncr3000 ;;
i[34]86-*-sco*) host_makefile_frag=config/mh-sco ;;
i[34]86-*-linux) host_makefile_frag=config/mh-linux ;;
+ i[34]86-*-solaris2*) host_makefile_frag=config/mh-sysv4 ;;
*-ibm-aix*) host_makefile_frag=config/mh-aix ;;
*-sun-solaris*) host_makefile_frag=config/mh-solaris ;;
*-hp-hpux) host_makefile_frag=config/mh-hpux ;;