[Gnucash-changes] r11805 - gnucash/branches/cashutil/cashutil - Add readline support

[Neil Williams]

Author: codehelp
Date: 2005-11-03 06:08:17 -0500 (Thu, 03 Nov 2005)
New Revision: 11805

Added:
   gnucash/branches/cashutil/cashutil/m4/
   gnucash/branches/cashutil/cashutil/m4/vl_lib_readline.m4
Log:
Add readline support

Added: gnucash/branches/cashutil/cashutil/m4/vl_lib_readline.m4
===================================================================
--- gnucash/branches/cashutil/cashutil/m4/vl_lib_readline.m4	2005-11-03 11:07:39 UTC (rev 11804)
+++ gnucash/branches/cashutil/cashutil/m4/vl_lib_readline.m4	2005-11-03 11:08:17 UTC (rev 11805)
@@ -0,0 +1,112 @@
+dnl @synopsis VL_LIB_READLINE
+dnl
+dnl Searches for a readline compatible library.  If found, defines
+dnl `HAVE_LIBREADLINE'.  If the found library has the `add_history'
+dnl function, sets also `HAVE_READLINE_HISTORY'.  Also checks for the
+dnl locations of the necessary include files and sets `HAVE_READLINE_H'
+dnl or `HAVE_READLINE_READLINE_H' and `HAVE_READLINE_HISTORY_H' or
+dnl 'HAVE_HISTORY_H' if the corresponding include files exists.
+dnl
+dnl The libraries that may be readline compatible are `libedit',
+dnl `libeditline' and `libreadline'.  Sometimes we need to link a termcap
+dnl library for readline to work, this macro tests these cases too by
+dnl trying to link with `libtermcap', `libcurses' or `libncurses' before
+dnl giving up.
+dnl
+dnl Here is an example of how to use the information provided by this
+dnl macro to perform the necessary includes or declarations in a C file:
+dnl
+dnl   #ifdef HAVE_LIBREADLINE
+dnl   #  if defined(HAVE_READLINE_READLINE_H)
+dnl   #    include <readline/readline.h>
+dnl   #  elif defined(HAVE_READLINE_H)
+dnl   #    include <readline.h>
+dnl   #  else /* !defined(HAVE_READLINE_H) */
+dnl   extern char *readline ();
+dnl   #  endif /* !defined(HAVE_READLINE_H) */
+dnl   char *cmdline = NULL;
+dnl   #else /* !defined(HAVE_READLINE_READLINE_H) */
+dnl     /* no readline */
+dnl   #endif /* HAVE_LIBREADLINE */
+dnl
+dnl   #ifdef HAVE_READLINE_HISTORY
+dnl   #  if defined(HAVE_READLINE_HISTORY_H)
+dnl   #    include <readline/history.h>
+dnl   #  elif defined(HAVE_HISTORY_H)
+dnl   #    include <history.h>
+dnl   #  else /* !defined(HAVE_HISTORY_H) */
+dnl   extern void add_history ();
+dnl   extern int write_history ();
+dnl   extern int read_history ();
+dnl   #  endif /* defined(HAVE_READLINE_HISTORY_H) */
+dnl     /* no history */
+dnl   #endif /* HAVE_READLINE_HISTORY */
+dnl
+dnl
+dnl @version 1.1
+dnl @author Ville Laurikari <vl at iki.fi>
+dnl
+dnl Modifications by T. Joseph Carter for pilot-link:
+dnl  - Don't put -lreadline in LIBS
+dnl  - Add --without-readline to disable use of it
+dnl  - Set msg_readline and RL_LIBS appropriately
+dnl
+dnl  TODO:
+dnl   - Add --with-readline-includes and -headers
+dnl   - Make the above default to $with_readline/{include,lib} if set to
+dnl     something other than "yes" or "no".
+dnl
+AC_DEFUN([VL_LIB_READLINE], [
+  msg_readline="no"
+  RL_LIBS=""
+  AC_ARG_WITH(readline,
+      [  --without-readline      Disable readline            [[default=no]]],,
+      with_readline="yes")
+  if test "x$with_readline" != "xno"; then
+
+    AC_CACHE_CHECK([for a readline compatible library],
+                   vl_cv_lib_readline, [
+      ORIG_LIBS="$LIBS"
+      for readline_lib in readline edit editline; do
+        for termcap_lib in "" termcap curses ncurses; do
+          if test -z "$termcap_lib"; then
+            TRY_LIB="-l$readline_lib"
+          else
+            TRY_LIB="-l$readline_lib -l$termcap_lib"
+          fi
+          LIBS="$ORIG_LIBS $TRY_LIB"
+          AC_TRY_LINK_FUNC(readline, vl_cv_lib_readline="$TRY_LIB")
+          if test -n "$vl_cv_lib_readline"; then
+            break
+          fi
+        done
+        if test -n "$vl_cv_lib_readline"; then
+          break
+        fi
+      done
+      if test -z "$vl_cv_lib_readline"; then
+        vl_cv_lib_readline="no"
+      fi
+      LIBS="$ORIG_LIBS"
+    ])
+  fi
+
+  if test "$vl_cv_lib_readline" != "no"; then
+    msg_readline="yes"
+    RL_LIBS="$vl_cv_lib_readline"
+    AC_DEFINE(HAVE_LIBREADLINE, 1,
+              [Define if you have a readline compatible library])
+    AC_CHECK_HEADERS(readline.h readline/readline.h)
+    AC_CACHE_CHECK([whether readline supports history],
+                   vl_cv_lib_readline_history, [
+      vl_cv_lib_readline_history="no"
+      AC_TRY_LINK_FUNC(add_history, vl_cv_lib_readline_history="yes")
+    ])
+    if test "$vl_cv_lib_readline_history" = "yes"; then
+      AC_DEFINE(HAVE_READLINE_HISTORY, 1,
+                [Define if your readline library has \`add_history'])
+      AC_CHECK_HEADERS(history.h readline/history.h)
+    fi
+  fi
+  AC_SUBST(RL_LIBS)
+])dnl