egcs-971201 top-level configure mishandles --with-gxx-include-dir

["Loren J. Rittle" <rittle at supra dot rsch dot comm dot mot dot com>]

Cygnus configure parses --with options provided on the command line
differently than GNU configure.

If the command line argument is xxx, then Cygnus configure places
with_xxx into the environment whereas GNU configure places xxx into
the environment.

GNU configure is used within the gcc subdirectory. Cygnus configure is
used within the top-level.

The following patch to the top-level configure program fixes the
handling of the --with-gxx-include-dir option (which appears to
have been written based upon GNU configure rules).

S rittle@supra; diff -c configure~ configure
*** configure~  Mon Dec  1 16:31:55 1997
--- configure   Tue Dec  2 20:47:14 1997
***************
*** 1174,1183 ****
            # provide a proper gxx_include_dir to all subdirs.
            # Note, if you change the default, make sure to fix both here
            # and in the gcc subdirectory.
!           if test -z "${gxx_include_dir}"; then
                echo gxx_include_dir = '${prefix}/include/g++' >> ${Makefile}
            else
!               echo gxx_include_dir = ${gxx_include_dir} >> ${Makefile}
            fi
  
              # reset prefix, exec_prefix, srcdir, SUBDIRS, NONSUBDIRS,
--- 1174,1183 ----
            # provide a proper gxx_include_dir to all subdirs.
            # Note, if you change the default, make sure to fix both here
            # and in the gcc subdirectory.
!           if test -z "${with_gxx_include_dir}"; then
                echo gxx_include_dir = '${prefix}/include/g++' >> ${Makefile}
            else
!               echo gxx_include_dir = ${with_gxx_include_dir} >> ${Makefile}
            fi
  
              # reset prefix, exec_prefix, srcdir, SUBDIRS, NONSUBDIRS,