+dnl Copyright (C) 2005, 2006 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
dnl Check longest integer in digits.
AC_DEFUN([BLP_INT_DIGITS],
fi
])dnl
+dnl Check for readline and history libraries.
+
+dnl Modified for PSPP by Ben Pfaff, based on readline.m4 serial 3 from
+dnl gnulib, which was written by Simon Josefsson, with help from Bruno
+dnl Haible and Oskar Liljeblad.
+
+AC_DEFUN([PSPP_READLINE],
+[
+ dnl Prerequisites of AC_LIB_LINKFLAGS_BODY.
+ AC_REQUIRE([AC_LIB_PREPARE_PREFIX])
+ AC_REQUIRE([AC_LIB_RPATH])
+
+ dnl Search for libreadline and define LIBREADLINE, LTLIBREADLINE and
+ dnl INCREADLINE accordingly.
+ AC_LIB_LINKFLAGS_BODY([readline])
+ AC_LIB_LINKFLAGS_BODY([history])
+
+ dnl Add $INCREADLINE to CPPFLAGS before performing the following checks,
+ dnl because if the user has installed libreadline and not disabled its use
+ dnl via --without-libreadline-prefix, he wants to use it. The AC_TRY_LINK
+ dnl will then succeed.
+ am_save_CPPFLAGS="$CPPFLAGS"
+ AC_LIB_APPENDTOVAR([CPPFLAGS], [$INCREADLINE $INCHISTORY])
+
+ AC_CACHE_CHECK(for readline, gl_cv_lib_readline, [
+ gl_cv_lib_readline=no
+ am_save_LIBS="$LIBS"
+ dnl On some systems, -lreadline doesn't link without an additional
+ dnl -lncurses or -ltermcap.
+ dnl Try -lncurses before -ltermcap, because libtermcap is unsecure
+ dnl by design and obsolete since 1994. Try -lcurses last, because
+ dnl libcurses is unusable on some old Unices.
+ for extra_lib in "" ncurses termcap curses; do
+ LIBS="$am_save_LIBS $LIBREADLINE $LIBHISTORY"
+ if test -n "$extra_lib"; then
+ LIBS="$LIBS -l$extra_lib"
+ fi
+ AC_TRY_LINK([#include <stdio.h>
+#include <readline/readline.h>
+#include <readline/history.h>],
+ [readline((char*)0); add_history((char*)0);],
+ gl_cv_lib_readline=yes)
+ if test "$gl_cv_lib_readline" = yes; then
+ if test -n "$extra_lib"; then
+ LIBREADLINE="$LIBREADLINE $LIBHISTORY -l$extra_lib"
+ LTLIBREADLINE="$LTLIBREADLINE $LTLIBHISTORY -l$extra_lib"
+ fi
+ break
+ fi
+ done
+ LIBS="$am_save_LIBS"
+ ])
+
+ if test "$gl_cv_lib_readline" = yes; then
+ AC_DEFINE(HAVE_READLINE, 1, [Define if you have the readline library.])
+ fi
+
+ if test "$gl_cv_lib_readline" = yes; then
+ AC_MSG_CHECKING([how to link with libreadline])
+ AC_MSG_RESULT([$LIBREADLINE])
+ else
+ dnl If $LIBREADLINE didn't lead to a usable library, we don't
+ dnl need $INCREADLINE either.
+ CPPFLAGS="$am_save_CPPFLAGS"
+ LIBREADLINE=
+ LTLIBREADLINE=
+ LIBHISTORY=
+ LTLIBHISTORY=
+ fi
+ AC_SUBST(LIBREADLINE)
+ AC_SUBST(LTLIBREADLINE)
+])
+
dnl aclocal.m4 ends here