termios.h contains the winsize structure we need to determine the
width of a terminal. Don't try to get the width of a terminal if we
don't have this header.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72018 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/autoconf/configure.ac b/autoconf/configure.ac
index 1e04b8c..cb217a5 100644
--- a/autoconf/configure.ac
+++ b/autoconf/configure.ac
@@ -823,8 +823,8 @@
 AC_HEADER_TIME
 
 AC_CHECK_HEADERS([dlfcn.h execinfo.h fcntl.h inttypes.h limits.h link.h])
-AC_CHECK_HEADERS([malloc.h setjmp.h signal.h stdint.h unistd.h utime.h])
-AC_CHECK_HEADERS([windows.h])
+AC_CHECK_HEADERS([malloc.h setjmp.h signal.h stdint.h termios.h unistd.h])
+AC_CHECK_HEADERS([utime.h windows.h])
 AC_CHECK_HEADERS([sys/mman.h sys/param.h sys/resource.h sys/time.h])
 AC_CHECK_HEADERS([sys/types.h sys/ioctl.h malloc/malloc.h mach/mach.h])
 if test "$ENABLE_THREADS" -eq 1 ; then