2008-12-29 Ralf Corsépius <ralf.corsepius@rtems.org>

* configure.ac: Require <errno.h>. Cleanup comments.
	Remove check for <sys/errno.h>.

cpukit/configure.ac

@@ -66,7 +66,7 @@ AC_CHECK_FUNCS([ttyname getcwd])
 # </FIXME>
 
 ## Check if the installed toolchain has these headers
-AC_CHECK_HEADER([tar.h])
+AC_CHECK_HEADERS([tar.h errno.h])
 
 ## error out if libc doesn't provide stdint.h
 AS_IF([test x"${ac_cv_header_stdint_h}" != xyes],