* unix/configure:

	* unix/tcl.m4: extended test of termios vs. termio vs. sgtty to
	better detect result on Linux and when certain configure
	redirections are being used. (max) [Patch #402923; Bug #227412,
	#219194]

1 files changed, 60 insertions, 0 deletions

diff --git a/unix/tcl.m4 b/unix/tcl.m4
index e4587ea..0bef313 100644
--- a/unix/tcl.m4
+++ b/unix/tcl.m4
@@ -1287,8 +1287,68 @@ main()
     }
     return 1;
 }], tk_ok=sgtty, tk_ok=none, tk_ok=none)
+
     if test $tk_ok = sgtty; then
 	AC_DEFINE(USE_SGTTY)
+    else
+	AC_TRY_RUN([
+#include <termios.h>
+#include <errno.h>
+
+main()
+{
+    struct termios t;
+    if (tcgetattr(0, &t) == 0
+	|| errno == ENOTTY || errno == ENXIO || errno == EINVAL) {
+	cfsetospeed(&t, 0);
+	t.c_cflag |= PARENB | PARODD | CSIZE | CSTOPB;
+	return 0;
+    }
+    return 1;
+}], tk_ok=termios, tk_ok=no, tk_ok=no)
+
+    if test $tk_ok = termios; then
+	AC_DEFINE(USE_TERMIOS)
+    else
+	AC_TRY_RUN([
+#include <termio.h>
+#include <errno.h>
+
+main()
+{
+    struct termio t;
+    if (ioctl(0, TCGETA, &t) == 0
+	|| errno == ENOTTY || errno == ENXIO || errno == EINVAL) {
+	t.c_cflag |= CBAUD | PARENB | PARODD | CSIZE | CSTOPB;
+	return 0;
+    }
+    return 1;
+    }], tk_ok=termio, tk_ok=no, tk_ok=no)
+
+    if test $tk_ok = termio; then
+	AC_DEFINE(USE_TERMIO)
+    else
+	AC_TRY_RUN([
+#include <sgtty.h>
+#include <errno.h>
+
+main()
+{
+    struct sgttyb t;
+    if (ioctl(0, TIOCGETP, &t) == 0
+	|| errno == ENOTTY || errno == ENXIO || errno == EINVAL) {
+	t.sg_ospeed = 0;
+	t.sg_flags |= ODDP | EVENP | RAW;
+	return 0;
+    }
+    return 1;
+}], tk_ok=sgtty, tk_ok=none, tk_ok=none)
+
+    if test $tk_ok = sgtty; then
+	AC_DEFINE(USE_SGTTY)
+    fi
+    fi
+    fi
     fi
     fi
     fi