Merge branch 'next'

* next:
  minor, check for xiar in c.ac to support intel's IPO
  cosmetics, up c.ac's copyright notice
  fix, move libtool checks further down so the linker doesn't interfere with other checks
  chore, update sxe-libtool m4 macro package
  chore, remove all unused macro packages
  chore, adapt c.ac to missing SXE_CHECK_LDFLAGS
  chore, update sxe-compiler.m4 macro package
  fix, refactor symbanging, finish on \nul