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|
dnl Scott Dattalo
dnl
dnl This is copied from the NcFTP distribution.
dnl Author Mike Gleason mgleason@NcFTP.com
dnl
dnl This macro will check for the presence and version
dnl of the readline library. To get it into the aclocal.m4
dnl file, do this:
dnl aclocal -I . --verbose
dnl
dnl The --verbose will show all of the files that are searched
dnl for .m4 macros.
AC_DEFUN(wi_LIB_READLINE, [
AC_MSG_CHECKING([for GNU Readline library, version 2.0 or newer])
wi_cv_lib_readline=no
wi_cv_lib_readline_result=no
ac_save_LIBS="$LIBS"
# Note: $LIBCURSES is permitted to be empty.
for LIBREADLINE in "-lreadline" "-lreadline $LIBCURSES" "-lreadline -ltermcap" "-lreadline -lncurses" "-lreadline -lcurses"
do
LIBS="$ac_save_LIBS $LIBREADLINE"
AC_TRY_RUN([
/* program */
#include <stdio.h>
#include <stdlib.h>
main(int argc, char **argv)
{
/* Note: don't actually call readline, since it may block;
* We just want to see if it (dynamic) linked in okay.
*/
if (argc == 0) /* never true */
readline(0);
exit(0);
}
],[
# action if true
wi_cv_lib_readline=yes
],[
# action if false
wi_cv_lib_readline=no
],[
# action if cross compiling
wi_cv_lib_readline=no
])
if test "$wi_cv_lib_readline" = yes ; then break ; fi
done
# Now try it again, to be sure it is recent enough.
# rl_function_of_keyseq appeared in version 2.0
#
dnl AC_CHECK_FUNC(rl_function_of_keyseq, [wi_cv_lib_readline=yes],[
dnl wi_cv_lib_readline=no;wi_cv_lib_readline_result="no (it is present but too old to use)"
dnl ])
AC_TRY_LINK([
/* includes */
],[
/* function-body */
readline(0);
rl_function_of_keyseq(0);
],[
wi_cv_lib_readline=yes
],[
wi_cv_lib_readline=no
wi_cv_lib_readline_result="no (it is present but too old to use)"
])
if test "$wi_cv_lib_readline" = no ; then
LIBREADLINE=""
# restore LIBS
LIBS="$ac_save_LIBS"
else
/bin/rm -f readline.ver
touch readline.ver
AC_TRY_RUN([
/* program */
#include <unistd.h>
#include <sys/types.h>
#include <stdio.h>
extern char *rl_library_version;
main()
{
FILE *fp;
double d;
sscanf(rl_library_version, "%lf", &d);
fp = fopen("readline.ver", "w");
if (fp == NULL) exit(1);
if (fprintf(fp, "%s\n", rl_library_version) < 0) exit(1);
if (fprintf(fp, "%03d\n", (int) (d * 100.0)) < 0) exit(1);
if (fclose(fp) < 0) exit(1);
exit(0);
}
],[
# action if true
rl_library_version=`sed -n 1,1p readline.ver 2>/dev/null`
rlver=`sed -n 2,2p readline.ver 2>/dev/null`
/bin/rm -f readline.ver
],[
# action if false
rl_library_version=''
rlver=''
/bin/rm -f readline.ver
],[
# action if cross compiling
rl_library_version=''
rlver=''
/bin/rm -f readline.ver
])
case "$rlver" in
???)
wi_cv_lib_readline_result="yes, installed version is $rl_library_version"
;;
*)
# Test using current LIBS.
AC_TRY_LINK([
/* includes */
extern int rl_completion_append_character;
],[
/* function-body */
readline(0);
rl_completion_append_character = 0;
],[
rlver="210"
],[
rlver="200"
])
if test "$rlver" = "210" ; then
wi_cv_lib_readline_result="yes, version 2.1 or higher"
else
wi_cv_lib_readline_result="yes, version 2.0"
fi
;;
esac
wi_cv_lib_readline=yes
# restore LIBS
LIBS="$ac_save_LIBS"
fi
AC_MSG_RESULT($wi_cv_lib_readline_result)
AC_SUBST(LIBREADLINE)
if test "$wi_cv_lib_readline" = yes ; then
# Now verify that all the headers are installed.
#
AC_REQUIRE_CPP()
unset ac_cv_header_readline_chardefs_h
unset ac_cv_header_readline_history_h
unset ac_cv_header_readline_keymaps_h
unset ac_cv_header_readline_readline_h
unset ac_cv_header_readline_tilde_h
AC_CHECK_HEADERS([readline/chardefs.h readline/history.h readline/keymaps.h readline/readline.h readline/tilde.h])
for xxwi in \
"$ac_cv_header_readline_chardefs_h" \
"$ac_cv_header_readline_history_h" \
"$ac_cv_header_readline_keymaps_h" \
"$ac_cv_header_readline_readline_h" \
"$ac_cv_header_readline_tilde_h"
do
if test "$xxwi" = no ; then
break
fi
done
if test "$xxwi" = no ; then
AC_MSG_WARN([GNU Readline headers are not installed or could not be found -- GNU Readline will not be used.])
wi_cv_lib_readline=no
wi_cv_lib_readline_result="no (headers not installed)"
else
AC_DEFINE_UNQUOTED(HAVE_LIBREADLINE, $rlver)
fi
fi
])
dnl
dnl
|
