3 dnl This macro checks for the presence of the readline library.
4 dnl It works also in cross-compilation environment.
6 dnl To get it into the aclocal.m4 dnl file, do this:
7 dnl aclocal -I . --verbose
9 dnl The --verbose will show all of the files that are searched
12 AC_DEFUN([wi_LIB_READLINE], [
13 dnl check for the readline.h header file
15 AC_CHECK_HEADER(readline/readline.h)
17 if test "$ac_cv_header_readline_readline_h" = yes; then
18 dnl check the readline version
20 cat > conftest.$ac_ext <<EOF
22 #include <readline/readline.h>
23 wi_LIB_READLINE_VERSION RL_VERSION_MAJOR RL_VERSION_MINOR
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\]]*\)$/\1.\2/p")
29 if test -n "$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 $wi_MINOR \* 10)
35 wi_READLINE_VERSION=$(expr $wi_MAJOR \* 100 + $wi_MINOR)
37 wi_READLINE_VERSION=-1
40 dnl check for the readline library
43 # Note: $LIBCURSES is permitted to be empty.
45 for LIBREADLINE in "-lreadline.dll" "-lreadline" "-lreadline $LIBCURSES" "-lreadline -ltermcap" "-lreadline -lncurses" "-lreadline -lcurses"
47 AC_MSG_CHECKING([for GNU Readline library $LIBREADLINE])
49 LIBS="$ac_save_LIBS $LIBREADLINE"
54 #include <readline/readline.h>
57 int dummy = rl_completion_append_character; /* rl_completion_append_character appeared in version 2.1 */
60 wi_cv_lib_readline=yes
67 if test "$wi_cv_lib_readline" = yes; then
69 AC_DEFINE_UNQUOTED(HAVE_LIBREADLINE, $wi_READLINE_VERSION, [Readline])