Annotation of embedaddon/readline/examples/autoconf/wi_LIB_READLINE, revision 1.1.1.1
1.1 misho 1: dnl Borut Razem
2: dnl
3: dnl This macro checks for the presence of the readline library.
4: dnl It works also in cross-compilation environment.
5: dnl
6: dnl To get it into the aclocal.m4 dnl file, do this:
7: dnl aclocal -I . --verbose
8: dnl
9: dnl The --verbose will show all of the files that are searched
10: dnl for .m4 macros.
11:
12: AC_DEFUN([wi_LIB_READLINE], [
13: dnl check for the readline.h header file
14:
15: AC_CHECK_HEADER(readline/readline.h)
16:
17: if test "$ac_cv_header_readline_readline_h" = yes; then
18: dnl check the readline version
19:
20: cat > conftest.$ac_ext <<EOF
21: #include <stdio.h>
22: #include <readline/readline.h>
23: wi_LIB_READLINE_VERSION RL_VERSION_MAJOR RL_VERSION_MINOR
24: EOF
25:
26: wi_READLINE_VERSION=$($CPP $CPPFLAGS conftest.$ac_ext | sed -n -e "s/^wi_LIB_READLINE_VERSION *\([[0-9\]][[0-9\]]*\) *\([[0-9\]][[0-9\]]*\)$/\1.\2/p")
27: rm -rf conftest*
28:
29: if test -n "$wi_READLINE_VERSION"; then
30: wi_MAJOR=$(expr $wi_READLINE_VERSION : '\([[0-9]][[0-9]]*\)\.')
31: wi_MINOR=$(expr $wi_READLINE_VERSION : '[[0-9]][[0-9]]*\.\([[0-9]][[0-9]]*$\)')
32: if test $wi_MINOR -lt 10; then
33: wi_MINOR=$(expr $wi_MINOR \* 10)
34: fi
35: wi_READLINE_VERSION=$(expr $wi_MAJOR \* 100 + $wi_MINOR)
36: else
37: wi_READLINE_VERSION=-1
38: fi
39:
40: dnl check for the readline library
41:
42: ac_save_LIBS="$LIBS"
43: # Note: $LIBCURSES is permitted to be empty.
44:
45: for LIBREADLINE in "-lreadline.dll" "-lreadline" "-lreadline $LIBCURSES" "-lreadline -ltermcap" "-lreadline -lncurses" "-lreadline -lcurses"
46: do
47: AC_MSG_CHECKING([for GNU Readline library $LIBREADLINE])
48:
49: LIBS="$ac_save_LIBS $LIBREADLINE"
50:
51: AC_TRY_LINK([
52: /* includes */
53: #include <stdio.h>
54: #include <readline/readline.h>
55: ],[
56: /* function-body */
57: int dummy = rl_completion_append_character; /* rl_completion_append_character appeared in version 2.1 */
58: readline(NULL);
59: ],[
60: wi_cv_lib_readline=yes
61: AC_MSG_RESULT(yes)
62: ],[
63: wi_cv_lib_readline=no
64: AC_MSG_RESULT(no)
65: ])
66:
67: if test "$wi_cv_lib_readline" = yes; then
68: AC_SUBST(LIBREADLINE)
69: AC_DEFINE_UNQUOTED(HAVE_LIBREADLINE, $wi_READLINE_VERSION, [Readline])
70: break
71: fi
72: done
73:
74: LIBS="$ac_save_LIBS"
75: fi
76: ])
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