Generated bash completion at configure time

configure.ac

@@ -29,7 +29,16 @@ AM_CONDITIONAL([ENABLE_BASH_COMPLETION],[test "x$with_bash_completion_dir" != "x
 # TIO_CHECK_BAUDRATE(N)
 AC_DEFUN(
     [TIO_CHECK_BAUDRATE],
-    [AC_CHECK_DECLS([B$1], [AC_SUBST([B$1], [$1])], [], [[#include <termios.h>]])]
+    [
+        tio_have_decl=0
+        AS_IF([test $1 -le 38400],
+            # Baud rates up to 38400 are defined by POSIX,
+            # so we don't have to check for them.
+            [tio_have_decl=1],
+            [AC_CHECK_DECLS([B$1], [tio_have_decl=1], [], [[#include <termios.h>]])]
+        )
+        AS_IF([test $tio_have_decl = 1], [AC_SUBST([BAUDRATES], ["$BAUDRATES $1"])])
+    ]
 )
 
 # TIO_CHECK_BAUDRATES(N1, N2, ...)
@@ -39,7 +48,24 @@ AC_DEFUN(
 )
 
 # Check for available terminal I/O speeds
+BAUDRATES=
 TIO_CHECK_BAUDRATES(
+    0,
+    50,
+    75,
+    110,
+    134,
+    150,
+    200,
+    300,
+    600,
+    1200,
+    1800,
+    2400,
+    4800,
+    9600,
+    19200,
+    38400,
     57600,
     115200,
     230400,
@@ -59,5 +85,6 @@ TIO_CHECK_BAUDRATES(
 
 AC_CONFIG_FILES([Makefile])
 AC_CONFIG_FILES([src/Makefile])
+AC_CONFIG_FILES([src/bash-completion/tio])
 AC_CONFIG_FILES([man/Makefile])
 AC_OUTPUT

src/Makefile.am

@@ -14,26 +14,6 @@ tio_SOURCES = tty.c \
               include/tio/error.h
 
 if ENABLE_BASH_COMPLETION
-CLEANFILES = bash-completion/tio
-
-do_subst = sed -e 's/57600 /$(B57600) /g' \
-               -e 's/115200 /$(B115200) /g' \
-               -e 's/230400 /$(B230400) /g' \
-               -e 's/460800 /$(B460800) /g' \
-               -e 's/500000 /$(B500000) /g' \
-               -e 's/576000 /$(B576000) /g' \
-               -e 's/921600 /$(B921600) /g' \
-               -e 's/1000000 /$(B1000000) /g' \
-               -e 's/1152000 /$(B1152000) /g' \
-               -e 's/1500000 /$(B1500000) /g' \
-               -e 's/2000000 /$(B2000000) /g' \
-               -e 's/2500000 /$(B2500000) /g' \
-               -e 's/3000000 /$(B3000000) /g' \
-               -e 's/3500000 /$(B3500000) /g' \
-               -e 's/4000000/$(B4000000)/g'
-
-bash-completion/tio: bash-completion/tio.in
-	$(do_subst) < bash-completion/tio.in > bash-completion/tio
 
 bashcompletiondir=@BASH_COMPLETION_DIR@
 dist_bashcompletion_DATA=bash-completion/tio

src/bash-completion/tio.in

@@ -24,37 +24,7 @@ _tio()
     #  Complete the arguments to the options.
     case "${prev}" in
         -b | --baudrate)
-            local baudrates="0 \
+            local baudrates="@BAUDRATES@"
-                             50 \
-                             75 \
-                             110 \
-                             134 \
-                             150 \
-                             200 \
-                             300 \
-                             600 \
-                             1200 \
-                             1800 \
-                             2400 \
-                             4800 \
-                             9600 \
-                             19200 \
-                             38400 \
-                             57600 \
-                             115200 \
-                             230400 \
-                             460800 \
-                             500000 \
-                             576000 \
-                             921600 \
-                             1000000 \
-                             1152000 \
-                             1500000 \
-                             2000000 \
-                             2500000 \
-                             3000000 \
-                             3500000 \
-                             4000000"
             COMPREPLY=( $(compgen -W "$baudrates" -- ${cur}) )
             return 0
             ;;