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        * configure.in (AC_PREREQ): Update to 2.13.
        (AC_EXEEXT): Call to find possible file extension.
        (compiler_name): Use.
        * configure: Regenerate.
libio, libstdc++
        * configure.in: Test for ${compiler_name}.exe as well.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@27050 138bc75d-0d04-0410-961f-82ee72b054a4