From f701beb408b9e9ed3379a1898bd45c182868d462 Mon Sep 17 00:00:00 2001
From: Jakub Wilk <jwilk@jwilk.net>
Date: Thu, 26 May 2016 12:59:12 +0200
Subject: [PATCH] Reduced code duplication in baud rate detection

---
 configure.ac | 44 +++++++++++++++++++++++++++++---------------
 1 file changed, 29 insertions(+), 15 deletions(-)

diff --git a/configure.ac b/configure.ac
index 3d5b5b0..8086897 100644
--- a/configure.ac
+++ b/configure.ac
@@ -26,22 +26,36 @@ fi
 AC_SUBST([BASH_COMPLETION_DIR])
 AM_CONDITIONAL([ENABLE_BASH_COMPLETION],[test "x$with_bash_completion_dir" != "xno"])
 
+# TIO_CHECK_BAUDRATE(N)
+AC_DEFUN(
+    [TIO_CHECK_BAUDRATE],
+    [AC_CHECK_DECLS([B$1], [AC_SUBST([B$1], [$1])], [], [[#include <termios.h>]])]
+)
+
+# TIO_CHECK_BAUDRATES(N1, N2, ...)
+AC_DEFUN(
+    [TIO_CHECK_BAUDRATES],
+    [m4_foreach([n], [$@], [TIO_CHECK_BAUDRATE(m4_normalize(n))])]
+)
+
 # Check for available terminal I/O speeds
-AC_CHECK_DECLS([B57600], [AC_SUBST([B57600],["57600"])], [], [[#include <termios.h>]])
-AC_CHECK_DECLS([B115200], [AC_SUBST([B115200],["115200"])], [], [[#include <termios.h>]])
-AC_CHECK_DECLS([B230400], [AC_SUBST([B230400],["230400"])], [], [[#include <termios.h>]])
-AC_CHECK_DECLS([B460800], [AC_SUBST([B460800],["460800"])], [], [[#include <termios.h>]])
-AC_CHECK_DECLS([B500000], [AC_SUBST([B500000],["500000"])], [], [[#include <termios.h>]])
-AC_CHECK_DECLS([B576000], [AC_SUBST([B576000],["576000"])], [], [[#include <termios.h>]])
-AC_CHECK_DECLS([B921600], [AC_SUBST([B921600],["921600"])], [], [[#include <termios.h>]])
-AC_CHECK_DECLS([B1000000], [AC_SUBST([B1000000],["1000000"])], [], [[#include <termios.h>]])
-AC_CHECK_DECLS([B1152000], [AC_SUBST([B1152000],["1152000"])], [], [[#include <termios.h>]])
-AC_CHECK_DECLS([B1500000], [AC_SUBST([B1500000],["1500000"])], [], [[#include <termios.h>]])
-AC_CHECK_DECLS([B2000000], [AC_SUBST([B2000000],["2000000"])], [], [[#include <termios.h>]])
-AC_CHECK_DECLS([B2500000], [AC_SUBST([B2500000],["2500000"])], [], [[#include <termios.h>]])
-AC_CHECK_DECLS([B3000000], [AC_SUBST([B3000000],["3000000"])], [], [[#include <termios.h>]])
-AC_CHECK_DECLS([B3500000], [AC_SUBST([B3500000],["3500000"])], [], [[#include <termios.h>]])
-AC_CHECK_DECLS([B4000000], [AC_SUBST([B4000000],["4000000"])], [], [[#include <termios.h>]])
+TIO_CHECK_BAUDRATES(
+    57600,
+    115200,
+    230400,
+    460800,
+    500000,
+    576000,
+    921600,
+    1000000,
+    1152000,
+    1500000,
+    2000000,
+    2500000,
+    3000000,
+    3500000,
+    4000000
+)
 
 AC_CONFIG_FILES([Makefile])
 AC_CONFIG_FILES([src/Makefile])