Re: Problem with an oct file that won't load

[John W. Eaton]

On 23-Oct-2008, John Swensen wrote:

| Attached is a patch to give more information when it fails to load on  
| OSX.  FYI, as of OSX 10.5 dlopen is the preferred method and all these  
| NS* functions are deprecated.

OK, then would someone who uses OS X like to take a look at the
following part of Octave's configure.in file and modify it so that it
first checks for dlopen on OS X systems, and only uses the older
interface if it dlopen is not present?

  ## Check for dyld first since OS X can have a non-standard libdl      

  AC_CHECK_HEADER(mach-o/dyld.h)  
  if test "$ac_cv_header_mach_o_dyld_h" = yes; then
    dyld_api=true
  else 
    AC_CHECK_LIB(dld, shl_load)
    AC_CHECK_FUNCS(shl_load shl_findsym)
    if test "$ac_cv_func_shl_load" = yes \
      && test "$ac_cv_func_shl_findsym" = yes; then
      shl_load_api=true
    else
      AC_CHECK_LIB(wsock32, LoadLibrary)
      AC_CHECK_FUNCS(LoadLibrary)
      if test "$ac_cv_func_loadlibrary" = yes; then
        loadlibrary_api=true
      else
        AC_CHECK_LIB(dl, dlopen)
        AC_CHECK_FUNCS(dlopen dlsym dlerror dlclose)
        if test "$ac_cv_func_dlclose" = yes \
          && test "$ac_cv_func_dlerror" = yes \
          && test "$ac_cv_func_dlopen" = yes \
          && test "$ac_cv_func_dlsym" = yes; then
          dlopen_api=true
        else
          case "$canonical_host_type" in
            i[[3456]]86-*-sco3.2v5*)
              LD_CXX='LD_RUN_PATH=$LD_RUN_PATH:$(octlibdir) $(CXX)'
              dlopen_api=true
            ;;
          esac
        fi
      fi
    fi
  fi


Thanks,

jwe