diff -uNr cboard-0.7.5/configure cboard-0.7.5.mod/configure
--- cboard-0.7.5/configure	2018-09-27 17:48:24.000000000 +0300
+++ cboard-0.7.5.mod/configure	2019-08-16 14:05:44.294565834 +0300
@@ -12194,13 +12194,8 @@
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for Unix98 pty support" >&5
 $as_echo_n "checking for Unix98 pty support... " >&6; }
-if test -c "/dev/ptmx"; then
-    have_ptmx=yes
-else
-    have_ptmx=no
-fi
-
-ptmx_works=no
+have_ptmx=yes
+ptmx_works=yes
 
 if test "x$have_ptmx" = "xyes"; then
     ac_ext=c
@@ -12210,40 +12205,7 @@
 ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
     if test "$cross_compiling" = yes; then :
-  { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
-$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
-as_fn_error $? "cannot run test program while cross compiling
-See \`config.log' for more details" "$LINENO" 5; }
-else
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-\
-		   #include <stdio.h>
-		   #include <sys/types.h>
-		   #include <sys/stat.h>
-		   #include <fcntl.h>
-
-		   int main()
-		   {
-		       int fd;
-
-		       if ((fd = open("/dev/ptmx", O_RDWR)) == -1)
-		           exit(1);
-
-		       if (ptsname(fd) == NULL)
-		           exit(1);
-
-		       exit(0);
-		   }
-
-_ACEOF
-if ac_fn_c_try_run "$LINENO"; then :
   ptmx_works=yes
-else
-  ptmx_works=no
-fi
-rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
-  conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi