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Date:	Sat, 30 May 2009 12:59:15 +0000 (GMT)
From:	Marco Atzeri <marco_atzeri AT yahoo DOT it>
Subject:	Re: R: [1.7] does LD_PRELOAD support more than 1 dll ?
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--- Sab 30/5/09, Christopher ha scritto:

> >> ? Did you export it?? That might make a
> >> difference if the shell is involved.
> >>=20
> >> ? ? cheers,
> >> ? ? ? DaveK
> >>=20
> >Hi Dave,
> >also exporting all the 3 variables in the script
> >does make no difference
> >
> >export
> PATH=3D"$builddir/src:$builddir/liboctave:$builddir/libcruft:$PATH"
> >export LD_PRELOAD=3D"$liboctinterp:$liboctave:$libcruft"
> >export
> LD_LIBRARY_PATH=3D"$builddir/src:$builddir/liboctave:$builddir/libcruft:$=
LD_LIBRARY_PATH"
> >OCTAVE_SITE_INITFILE=3D"$top_srcdir/scripts/startup/main-rcfile"
> \
> >=A0 exec $driver "$builddir/src/octave"
> --no-init-path --path=3D"$LOADPATH" --image-path=3D"$IMAGEPATH"
> --doc-cache-file=3D"$DOCFILE" --info-file=3D"$INFOFILE" "$@"
> >
> >
> >=A0 =A0 =A0 5 [main] sh 3964
> C:\cygwin2\bin\sh.exe: *** fatal error - error while loading
> shared libraries:
> /pub/cygports/octave/octave-3.2.0-rc4_build/src/cygoctinterp.dll:
> cannot open shared object file: No such process
>=20
>  From the source:
>=20
> =A0 =A0 =A0 if (!LoadLibraryW
> (lib.get_wide_win32_path (libname)))
> =A0 =A0 =A0 =A0 {
> =A0 =A0 =A0 =A0 =A0 __seterrno ();
> =A0 =A0 =A0 =A0 =A0 api_fatal ("error while
> loading shared libraries: %s: "
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0
> =A0 =A0=A0=A0"cannot open shared object file:
> %s", p,
> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0
> =A0 =A0=A0=A0strerror (get_errno ()));
> =A0 =A0 =A0 =A0 }
>=20
>  "No such process" =3D=3D ESRCH =3D=3D PROC_NOT_FOUND
>=20
> cgf

Hi Christopher
but the dll file is there:

$ ls -lh /pub/cygports/octave/octave-3.2.0-rc4_build/src/cygoctinterp.dll
-rwxr-xr-x 1 itq00146 Domain_Users 202M May 27 20:01 /pub/cygports/octave/o=
ctave-3.2.0-rc4_build/src/cygoctinterp.dll

so how can it fail to load dlls only with LD_PRELOAD defined ?

Ok, I found it.=20
The order is also relevant

cygoctinterp.dll requires=20
   cygcruft.dll and cygoctave.dll

cygoctave.dll requires=20
  cygcruft.dll

So the working way is :

export LD_PRELOAD=3D"$libcruft:$liboctave:$liboctinterp"



Regards
Marco





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