-dnl Check longest integer in digits.
+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.
-AC_DEFUN([BLP_INT_DIGITS],
-[
-AC_MSG_CHECKING(number of digits in LONG_MIN (incl. sign))
-AC_CACHE_VAL(blp_int_digits,
- [AC_TRY_RUN([#include <stdio.h>
- #include <limits.h>
- int
- main()
- {
- int len;
- char s[80];
- sprintf(s, "%ld", LONG_MAX);
- len = strlen(s);
- sprintf(s, "%ld", LONG_MIN);
- if(strlen(s)>len) len=strlen(s);
- sprintf(s, "%lu", ULONG_MAX);
- if(strlen(s)>len) len=strlen(s);
- exit(len);
- }
- ],
- eval "blp_int_digits=19",
- eval "blp_int_digits=$?"
- if test "$blp_int_digits" -lt 11; then
- blp_int_digits=11
- fi,
- eval "blp_int_digits=19")
- ])
-AC_DEFINE_UNQUOTED([INT_DIGITS], $blp_int_digits,
- [Number of digits in longest `long' value, including sign.
- This is usually 11, for 32-bit `long's, or 19, for 64-bit
- `long's.])
-AC_MSG_RESULT($blp_int_digits) ])dnl
+dnl Check for readline and history libraries.
-dnl Check quality of this machine's sprintf implementation.
+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([BLP_IS_SPRINTF_GOOD],
+AC_DEFUN([PSPP_READLINE],
[
-AC_MSG_CHECKING(if sprintf returns a char count)
-AC_CACHE_VAL(blp_is_sprintf_good,
- [AC_TRY_RUN([#include <stdio.h>
- int
- main()
- {
- char s[8];
- exit((int)sprintf(s, "abcdefg")!=7);
- }
- ],
- eval "blp_is_sprintf_good=yes",
- eval "blp_is_sprintf_good=no",
- eval "blp_is_sprintf_good=no")
- ])
-if test "$blp_is_sprintf_good" = yes; then
- AC_DEFINE([HAVE_GOOD_SPRINTF], 1,
- [Define if sprintf() returns the number of characters written
- to the destination string, excluding the null terminator.])
- AC_MSG_RESULT(yes)
-else
- AC_MSG_RESULT(no)
-fi
-])dnl
+ dnl Prerequisites of AC_LIB_LINKFLAGS_BODY.
+ AC_REQUIRE([AC_LIB_PREPARE_PREFIX])
+ AC_REQUIRE([AC_LIB_RPATH])
-dnl Check for proper random number generator.
+ dnl Search for libreadline and define LIBREADLINE, LTLIBREADLINE and
+ dnl INCREADLINE accordingly.
+ AC_LIB_LINKFLAGS_BODY([readline])
+ AC_LIB_LINKFLAGS_BODY([history])
-AC_DEFUN([BLP_RANDOM],
-[
-AC_MSG_CHECKING(random number generator)
-AC_CACHE_VAL(blp_random_good,
- AC_TRY_COMPILE([#include <stdlib.h>], [int x=RAND_MAX;],
- blp_random_good=yes, blp_random_good=no))
-if test "$blp_random_good" = yes; then
- AC_DEFINE([HAVE_GOOD_RANDOM], 1,
- [Define if rand() and company work according to ANSI.])
- AC_MSG_RESULT(good)
-else
- AC_MSG_RESULT(bad)
-fi
-])dnl
+ 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
projects / pspp-builds.git / blobdiff