Do not use test -a/-o.  Use shell features like &&, || or case...esac.
Use grep instead of egrep (but not the not-yet-portable Posix variant grep -E).
Based on a patch from Paul Eggert.

update misc notices

Trim this.

Improve regex to allow detection of : inside of filenames.
Skip files with ':' in name
Fix noslash 'next' vs 'continue' bug

macros.  Proceedures for using alternative dependency generation
"compiler" and "flags" has changed.
    Pre-configure:
        env MKDEP=mycc MKDEP_FLAGS=myccflags ./configure
    Post-configure:
        hack top.mk and run ./config.status