contrib/ntp/sntp/m4/ntp_lineeditlibs.m4

   1 AC_DEFUN([NTP_LINEEDITLIBS], [
   2     NTP_ORIG_LIBS="$LIBS"
   3     AC_ARG_WITH(
   4         [lineeditlibs],
   5         [AS_HELP_STRING(
   6             [--with-lineeditlibs],
   7             [edit,editline (readline may be specified if desired)]
   8         )],
   9         [use_lineeditlibs="$withval"],
  10         [use_lineeditlibs="edit,editline"]
  11     )
  12     AC_MSG_CHECKING([line editing libraries])
  13     AC_MSG_RESULT([$use_lineeditlibs])
  14     case "$use_lineeditlibs" in
  15      no)
  16         ntp_lib_lineedit=no
  17         ;;
  18      *)
  19         for lineedit_lib in `echo $use_lineeditlibs | sed -e 's/,/ /'`; do
  20             for term_lib in "" termcap curses ncurses; do
  21                 case "$term_lib" in
  22                  '')
  23                     TRY_LIB="-l$lineedit_lib"
  24                     ;;
  25                  *)
  26                     TRY_LIB="-l$lineedit_lib -l$term_lib"
  27                     ;;
  28                 esac
  29                 LIBS="$NTP_ORIG_LIBS $TRY_LIB"
  30                 AC_MSG_CHECKING([for readline() with $TRY_LIB])
  31                 AC_TRY_LINK_FUNC([readline], [ntp_lib_lineedit="$TRY_LIB"])
  32                 case "$ntp_lib_lineedit" in
  33                  '')
  34                     AC_MSG_RESULT([no])
  35                     ;;
  36                  *)
  37                     # Use readline()
  38                     AC_MSG_RESULT([yes])
  39                     break
  40                 esac
  41                 case "$term_lib" in
  42                  '')
  43                     # do not try el_gets without a terminal library
  44                     ;;
  45                  *)
  46                     AC_MSG_CHECKING([for el_gets() with $TRY_LIB])
  47                     AC_TRY_LINK_FUNC([el_gets], [ntp_lib_lineedit="$TRY_LIB"])
  48                     case "$ntp_lib_lineedit" in
  49                      '')
  50                         AC_MSG_RESULT([no])
  51                         ;;
  52                      *) # Use el_gets()
  53                         AC_MSG_RESULT([yes])
  54                         break
  55                         ;;
  56                     esac        # $ntp_lib_lineedit
  57                 esac            # $term_lib
  58             done
  59             case "$ntp_lib_lineedit" in
  60              '')
  61                 ;;
  62              *)
  63                 break
  64                 ;;
  65             esac
  66         done
  67         LIBS="$NTP_ORIG_LIBS"
  68         ;;
  69     esac        # $use_lineeditlibs
  70
  71     case "$ntp_lib_lineedit" in
  72      '')
  73         ntp_lib_lineedit="no"
  74         ;;
  75      no)
  76         ;;
  77      *)
  78         EDITLINE_LIBS="$ntp_lib_lineedit"
  79         AC_SUBST([EDITLINE_LIBS])
  80         ;;
  81     esac        # $ntp_lib_lineedit
  82
  83     case "$ntp_lib_lineedit" in
  84      no)
  85         ;;
  86      *)
  87         AC_CHECK_HEADERS([readline.h readline/readline.h histedit.h])
  88         AC_CHECK_HEADERS([history.h readline/history.h])
  89
  90         case "$ac_cv_header_histedit_h" in
  91          yes)
  92             AC_CACHE_CHECK(
  93                 [number of arguments to el_init()],
  94                 [ntp_cv_el_init_args],
  95                 [AC_COMPILE_IFELSE(
  96                     [AC_LANG_PROGRAM(
  97                         [[
  98                             #include <stdio.h>
  99                             #include <histedit.h>
 100                         ]],
 101                         [[
 102                             el_init("conftest", stdin, stdout, stderr);
 103                         ]]
 104                     )],
 105                     [ntp_cv_el_init_args=4],
 106                     [ntp_cv_el_init_args=3]
 107                 )]
 108             )
 109             AC_DEFINE_UNQUOTED(
 110                 [EL_INIT_ARGS],
 111                 [$ntp_cv_el_init_args],
 112                 [number of args to el_init()]
 113                 )
 114         esac
 115
 116         AC_MSG_CHECKING([whether readline supports history])
 117
 118         ntp_lib_lineedit_history="no"
 119         ORIG_LIBS="$LIBS"
 120         LIBS="$ORIG_LIBS $ntp_lib_lineedit"
 121         AC_TRY_LINK_FUNC([add_history], [ntp_lib_lineedit_history="yes"])
 122         LIBS="$ORIG_LIBS"
 123
 124         AC_MSG_RESULT([$ntp_lib_lineedit_history])
 125
 126         case "$ntp_lib_lineedit_history" in
 127          yes)
 128             AC_DEFINE([HAVE_READLINE_HISTORY], [1],
 129                 [Define if your readline library has \`add_history'])
 130         esac
 131     esac        # $ntp_lib_lineedit
 132     AS_UNSET([NTP_ORIG_LIBS])
 133     AS_UNSET([ORIG_LIBS])
 134     AS_UNSET([TRY_LIB])
 135     AS_UNSET([use_lineeditlibs])
 136 ])dnl