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Annotation of embedaddon/readline/examples/autoconf/wi_LIB_READLINE, revision 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: ])