git.gag.com Git - fw/sdcc/blob - debugger/mcs51/acinclude.m4

   1 dnl Scott Dattalo
   2 dnl
   3 dnl  This is copied from the NcFTP distribution.
   4 dnl  Author Mike Gleason mgleason@NcFTP.com
   5 dnl
   6 dnl This macro will check for the presence and version
   7 dnl of the readline library. To get it into the aclocal.m4
   8 dnl file, do this:
   9 dnl   aclocal -I . --verbose
  10 dnl
  11 dnl The --verbose will show all of the files that are searched
  12 dnl for .m4 macros.
  13 AC_DEFUN([wi_LIB_READLINE], [
  14 AC_MSG_CHECKING([for GNU Readline library, version 2.0 or newer])
  15
  16 wi_cv_lib_readline=no
  17 wi_cv_lib_readline_result=no
  18 ac_save_LIBS="$LIBS"
  19 # Note: $LIBCURSES is permitted to be empty.
  20 for LIBREADLINE in "-lreadline" "-lreadline $LIBCURSES" "-lreadline -ltermcap" "-lreadline -lncurses" "-lreadline -lcurses"
  21 do
  22         LIBS="$ac_save_LIBS $LIBREADLINE"
  23         AC_TRY_RUN([
  24         /* program */
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27
  28 main(int argc, char **argv)
  29 {
  30         /* Note:  don't actually call readline, since it may block;
  31          * We just want to see if it (dynamic) linked in okay.
  32          */
  33         if (argc == 0)  /* never true */
  34                 readline(0);
  35         exit(0);
  36 }
  37 ],[
  38         # action if true
  39         wi_cv_lib_readline=yes
  40 ],[
  41         # action if false
  42         wi_cv_lib_readline=no
  43 ],[
  44         # action if cross compiling
  45         wi_cv_lib_readline=no
  46 ])
  47
  48         if test "$wi_cv_lib_readline" = yes ; then break ; fi
  49 done
  50
  51 # Now try it again, to be sure it is recent enough.
  52 # rl_function_of_keyseq appeared in version 2.0
  53 #
  54 dnl AC_CHECK_FUNC(rl_function_of_keyseq, [wi_cv_lib_readline=yes],[
  55 dnl     wi_cv_lib_readline=no;wi_cv_lib_readline_result="no (it is present but too old to use)"
  56 dnl ])
  57         AC_TRY_LINK([
  58                 /* includes */
  59         ],[
  60                 /* function-body */
  61                 readline(0);
  62                 rl_function_of_keyseq(0);
  63         ],[
  64                 wi_cv_lib_readline=yes
  65         ],[
  66                 wi_cv_lib_readline=no
  67                 wi_cv_lib_readline_result="no (it is present but too old to use)"
  68         ])
  69
  70 if test "$wi_cv_lib_readline" = no ; then
  71         LIBREADLINE=""
  72         # restore LIBS
  73         LIBS="$ac_save_LIBS"
  74 else
  75         /bin/rm -f readline.ver
  76         touch readline.ver
  77
  78         AC_TRY_RUN([
  79         /* program */
  80 #include <unistd.h>
  81 #include <sys/types.h>
  82 #include <stdio.h>
  83
  84 extern char *rl_library_version;
  85
  86 main()
  87 {
  88         FILE *fp;
  89         double d;
  90
  91         sscanf(rl_library_version, "%lf", &d);
  92         fp = fopen("readline.ver", "w");
  93         if (fp == NULL) exit(1);
  94         if (fprintf(fp, "%s\n", rl_library_version) < 0) exit(1);
  95         if (fprintf(fp, "%03d\n", (int) (d * 100.0)) < 0) exit(1);
  96         if (fclose(fp) < 0) exit(1);
  97         exit(0);
  98 }
  99         ],[
 100                 # action if true
 101                 rl_library_version=`sed -n 1,1p readline.ver 2>/dev/null`
 102                 rlver=`sed -n 2,2p readline.ver 2>/dev/null`
 103                 /bin/rm -f readline.ver
 104         ],[
 105                 # action if false
 106                 rl_library_version=''
 107                 rlver=''
 108                 /bin/rm -f readline.ver
 109         ],[
 110                 # action if cross compiling
 111                 rl_library_version=''
 112                 rlver=''
 113                 /bin/rm -f readline.ver
 114         ])
 115
 116         case "$rlver" in
 117                 ???)
 118                         wi_cv_lib_readline_result="yes, installed version is $rl_library_version"
 119                         ;;
 120                 *)
 121                         # Test using current LIBS.
 122                         AC_TRY_LINK([
 123                                 /* includes */
 124                                 extern int rl_completion_append_character;
 125                         ],[
 126                                 /* function-body */
 127                                 readline(0);
 128                                 rl_completion_append_character = 0;
 129                         ],[
 130                                 rlver="210"
 131                         ],[
 132                                 rlver="200"
 133                         ])
 134
 135                         if test "$rlver" = "210" ; then
 136                                 wi_cv_lib_readline_result="yes, version 2.1 or higher"
 137                         else
 138                                 wi_cv_lib_readline_result="yes, version 2.0"
 139                         fi
 140                         ;;
 141         esac
 142
 143         wi_cv_lib_readline=yes
 144         # restore LIBS
 145         LIBS="$ac_save_LIBS"
 146 fi
 147 AC_MSG_RESULT($wi_cv_lib_readline_result)
 148 AC_SUBST(LIBREADLINE)
 149
 150 if test "$wi_cv_lib_readline" = yes ; then
 151         # Now verify that all the headers are installed.
 152         #
 153         AC_REQUIRE_CPP()
 154         unset ac_cv_header_readline_chardefs_h
 155         unset ac_cv_header_readline_history_h
 156         unset ac_cv_header_readline_keymaps_h
 157         unset ac_cv_header_readline_readline_h
 158         unset ac_cv_header_readline_tilde_h
 159         AC_CHECK_HEADERS([readline/chardefs.h readline/history.h readline/keymaps.h readline/readline.h readline/tilde.h])
 160
 161         for xxwi in \
 162                 "$ac_cv_header_readline_chardefs_h" \
 163                 "$ac_cv_header_readline_history_h" \
 164                 "$ac_cv_header_readline_keymaps_h" \
 165                 "$ac_cv_header_readline_readline_h" \
 166                 "$ac_cv_header_readline_tilde_h"
 167         do
 168                 if test "$xxwi" = no ; then
 169                         break
 170                 fi
 171         done
 172
 173         if test "$xxwi" = no ; then
 174                 AC_MSG_WARN([GNU Readline headers are not installed or could not be found -- GNU Readline will not be used.])
 175                 wi_cv_lib_readline=no
 176                 wi_cv_lib_readline_result="no (headers not installed)"
 177         else
 178                 AC_DEFINE_UNQUOTED(HAVE_LIBREADLINE, $rlver,[Readline])
 179         fi
 180 fi
 181         dnl Check to see if we have a namespace clean version of readline
 182         dnl or not. At least FreeBSD 4.9 ships with non-ns-clean readline.
 183         if test "$wi_cv_lib_readline" = "yes" ; then
 184                 ac_save_LIBS="$LIBS"
 185                 LIBS="$ac_save_LIBS $LIBREADLINE"
 186                 AC_CHECK_FUNCS(rl_completion_matches completion_matches)
 187                 # restore LIBS
 188                 LIBS="$ac_save_LIBS"
 189         fi
 190         dnl Check to see if rl_callback_handler_install takes a cast
 191         AC_MSG_CHECKING([to see if readline callbacks take a cast])
 192         ac_save_LIBS="$LIBS"
 193         LIBS="$ac_save_LIBS $LIBREADLINE"
 194         ac_save_CC="$CC"
 195         CC="$CXX"
 196         AC_TRY_LINK([
 197 #include <stdio.h>
 198 #include <readline/readline.h>
 199 void func(void) { return; }
 200         ],[
 201                 rl_callback_handler_install(">", (void(*)(char*))func);
 202         ],[
 203                 AC_DEFINE(READLINE_CB_TAKES_CAST, 1, [callbacks take a cast])
 204                 AC_MSG_RESULT([yes])
 205         ],[
 206                 AC_MSG_RESULT([no])
 207         ])
 208         # restore LIBS
 209         LIBS="$ac_save_LIBS"
 210         CC="$ac_save_CC"
 211 ])
 212 dnl
 213 dnl