1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
|
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
dnl termcap library for readline to work, this macro tests these cases
dnl too by trying to link with `libtermcap', `libcurses' or
dnl `libncurses' before 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
dnl 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 Modifications to add --enable-gnu-readline to work around licensing
dnl problems between the traditional BSD licence and the GPL.
dnl Martin Ebourne, 2005/7/11
dnl
dnl @category InstalledPackages
dnl @author Ville Laurikari <vl@iki.fi>
dnl @version 2002-04-04
dnl @license AllPermissive
AC_DEFUN([VL_LIB_READLINE], [
AC_ARG_ENABLE(
[gnu-readline],
AC_HELP_STRING([--enable-gnu-readline],
[Allow use of GNU readline (may violate GNU licence)])
)
vl_gnu_readline_lib=""
if test "x$enable_gnu_readline" = "xyes"; then
vl_gnu_readline_lib=readline
fi
AC_CACHE_CHECK([for a readline compatible library],
vl_cv_lib_readline, [
ORIG_LIBS="$LIBS"
for readline_lib in edit editline $vl_gnu_readline_lib; do
for termcap_lib in "" termcap curses ncurses; do
if test -z "$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 "$vl_cv_lib_readline"; then
vl_cv_lib_readline="no"
LIBS="$ORIG_LIBS"
fi
])
if test "x$vl_cv_lib_readline" != "xno"; then
AC_DEFINE(HAVE_LIBREADLINE, 1,
[Define if you have a readline compatible library])
AC_CHECK_HEADERS(readline.h readline/readline.h)
AC_CACHE_CHECK([whether readline supports history],
vl_cv_lib_readline_history, [
vl_cv_lib_readline_history="no"
AC_TRY_LINK_FUNC(add_history, vl_cv_lib_readline_history="yes")
])
if test "x$vl_cv_lib_readline_history" = "xyes"; 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
])dnl
|
