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Annotation of embedaddon/rsync/aclocal.m4, revision 1.1

1.1     ! misho       1: dnl AC_VALIDATE_CACHE_SYSTEM_TYPE[(cmd)]
        !             2: dnl if the cache file is inconsistent with the current host,
        !             3: dnl target and build system types, execute CMD or print a default
        !             4: dnl error message.
        !             5: AC_DEFUN(AC_VALIDATE_CACHE_SYSTEM_TYPE, [
        !             6:     AC_REQUIRE([AC_CANONICAL_SYSTEM])
        !             7:     AC_MSG_CHECKING([config.cache system type])
        !             8:     if { test x"${ac_cv_host_system_type+set}" = x"set" &&
        !             9:          test x"$ac_cv_host_system_type" != x"$host"; } ||
        !            10:        { test x"${ac_cv_build_system_type+set}" = x"set" &&
        !            11:          test x"$ac_cv_build_system_type" != x"$build"; } ||
        !            12:        { test x"${ac_cv_target_system_type+set}" = x"set" &&
        !            13:          test x"$ac_cv_target_system_type" != x"$target"; }; then
        !            14:        AC_MSG_RESULT([different])
        !            15:        ifelse($#, 1, [$1],
        !            16:                [AC_MSG_ERROR(["you must remove config.cache and restart configure"])])
        !            17:     else
        !            18:        AC_MSG_RESULT([same])
        !            19:     fi
        !            20:     ac_cv_host_system_type="$host"
        !            21:     ac_cv_build_system_type="$build"
        !            22:     ac_cv_target_system_type="$target"
        !            23: ])
        !            24: 
        !            25: dnl Check for socklen_t: historically on BSD it is an int, and in
        !            26: dnl POSIX 1g it is a type of its own, but some platforms use different
        !            27: dnl types for the argument to getsockopt, getpeername, etc.  So we
        !            28: dnl have to test to find something that will work.
        !            29: 
        !            30: dnl This is no good, because passing the wrong pointer on C compilers is
        !            31: dnl likely to only generate a warning, not an error.  We don't call this at
        !            32: dnl the moment.
        !            33: 
        !            34: AC_DEFUN([TYPE_SOCKLEN_T],
        !            35: [
        !            36:    AC_CHECK_TYPE([socklen_t], ,[
        !            37:       AC_MSG_CHECKING([for socklen_t equivalent])
        !            38:       AC_CACHE_VAL([rsync_cv_socklen_t_equiv],
        !            39:       [
        !            40:          # Systems have either "struct sockaddr *" or
        !            41:          # "void *" as the second argument to getpeername
        !            42:          rsync_cv_socklen_t_equiv=
        !            43:          for arg2 in "struct sockaddr" void; do
        !            44:             for t in int size_t unsigned long "unsigned long"; do
        !            45:                AC_TRY_COMPILE([
        !            46: #include <sys/types.h>
        !            47: #include <sys/socket.h>
        !            48: 
        !            49:                   int getpeername (int, $arg2 *, $t *);
        !            50:                ],[
        !            51:                   $t len;
        !            52:                   getpeername(0,0,&len);
        !            53:                ],[
        !            54:                   rsync_cv_socklen_t_equiv="$t"
        !            55:                   break
        !            56:                ])
        !            57:             done
        !            58:          done
        !            59: 
        !            60:          if test "x$rsync_cv_socklen_t_equiv" = x; then
        !            61:             AC_MSG_ERROR([Cannot find a type to use in place of socklen_t])
        !            62:          fi
        !            63:       ])
        !            64:       AC_MSG_RESULT($rsync_cv_socklen_t_equiv)
        !            65:       AC_DEFINE_UNQUOTED(socklen_t, $rsync_cv_socklen_t_equiv,
        !            66:                        [type to use in place of socklen_t if not defined])],
        !            67:       [#include <sys/types.h>
        !            68: #include <sys/socket.h>])
        !            69: ])
        !            70: 
        !            71: dnl AC_HAVE_TYPE(TYPE,INCLUDES)
        !            72: AC_DEFUN([AC_HAVE_TYPE], [
        !            73: AC_REQUIRE([AC_HEADER_STDC])
        !            74: cv=`echo "$1" | sed 'y%./+- %__p__%'`
        !            75: AC_MSG_CHECKING(for $1)
        !            76: AC_CACHE_VAL([ac_cv_type_$cv],
        !            77: AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
        !            78: AC_INCLUDES_DEFAULT
        !            79: $2]],
        !            80: [[$1 foo;]])],
        !            81: [eval "ac_cv_type_$cv=yes"],
        !            82: [eval "ac_cv_type_$cv=no"]))dnl
        !            83: ac_foo=`eval echo \\$ac_cv_type_$cv`
        !            84: AC_MSG_RESULT($ac_foo)
        !            85: if test "$ac_foo" = yes; then
        !            86:   ac_tr_hdr=HAVE_`echo $1 | sed 'y%abcdefghijklmnopqrstuvwxyz./- %ABCDEFGHIJKLMNOPQRSTUVWXYZ____%'`
        !            87: if false; then
        !            88:        AC_CHECK_TYPES($1)
        !            89: fi
        !            90:   AC_DEFINE_UNQUOTED($ac_tr_hdr, 1, [Define if you have type `$1'])
        !            91: fi
        !            92: ])