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SC_MISSING_POSIX_HEADERS
#--------------------------------------------------------------------
# Determines the correct executable file extension (.exe)
#--------------------------------------------------------------------
AC_EXEEXT
#------------------------------------------------------------------------
# If we're using GCC, see if the compiler understands -fshort-wchar. If so, use it.
# It makes sure you can use the wchar_t type interchangable with Tcl_UniChar
#------------------------------------------------------------------------
if test -z "$no_short_wchar" && test -n "$GCC"; then
AC_CACHE_CHECK([if the compiler understands -fshort-wchar],
tcl_cv_cc_short_wchar, [
hold_cflags=$CFLAGS; CFLAGS="$CFLAGS -fshort-wchar"
AC_TRY_COMPILE(,, tcl_cv_cc_short_wchar=yes, tcl_cv_cc_short_wchar=no)
CFLAGS=$hold_cflags])
if test $tcl_cv_cc_short_wchar = yes; then
CFLAGS="$CFLAGS -fshort-wchar"
fi
fi
#------------------------------------------------------------------------
# If we're using GCC, see if the compiler understands -pipe. If so, use it.
# It makes compiling go faster. (This is only a performance feature.)
#------------------------------------------------------------------------
if test -z "$no_pipe" && test -n "$GCC"; then
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