--- Ven 29/5/09, Christopher Faylor ha scritto:
> Da: Christopher Faylor
> Oggetto: Re: R: [1.7] does LD_PRELOAD support more than 1 dll ?
> A: cygwin
> Data: Venerdì 29 maggio 2009, 18:01
> On Fri, May 29, 2009 at 05:02:01PM
> +0100, Dave Korn wrote:
> >Christopher Faylor wrote:
> >>On Fri, May 29, 2009 at 09:34:36AM +0000, Marco
> Atzeri wrote:
> >>>It seems that cygwin does not accept the space
> as separator in
> >>>LD_PRELOAD as other systems
> >>
> >>And lets just all take a moment of silence for a
> second to see if we
> >>can discern why that might be.
> >
> >The ubiquity of paths containing spaces on windows file
> systems?
>
> Yes, I probably never should have done it though since it
> isn't
> compatible with Linux.
>
> cgf
>
May I suggest a small note in the documentation ?
Just to help the next one to not fall in the same problem.
:-)
Further question, which are the limitation of
the LD_PRELOAD implementation in cygwin ?
Octave is built around 3 dlls
cygcheck src/octave.exe
C:\cygwin2\bin\cygoctinterp.dll
C:\cygwin2\bin\cygcruft.dll
[snip]
C:\cygwin2\bin\cygoctave.dll
[snip]
on the other systems for the make check the program is
called with
LD_PRELOAD="$liboctinterp $liboctave $libcruft" \
OCTAVE_SITE_INITFILE="$top_srcdir/scripts/startup/main-rcfile" \
LD_LIBRARY_PATH="$builddir/src:$builddir/liboctave:$builddir/libcruft:$LD_LIBRARY_PATH"
\
exec $driver "$builddir/src/octave" --no-init-path --path="$LOADPATH" --imag
e-path="$IMAGEPATH" --doc-cache-file="$DOCFILE" --info-file="$INFOFILE" "$@"
I replaced the space with ":" and now the program is loaded
but on the tests I obtained mainly a long list of:
src/DLD-FUNCTIONS/chol.cc .............................. 3 [main] sh
4032 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
the same if I try to plot
plot(x,x)
3 [main] sh 4052 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
3 [main] gnuplot 1640 C:\cygwin2\bin\gnuplot.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
so it seems that the LD_PRELOAD is not working well
in case of fork.
It is not a critical issue as I already have implemented
a workaround. For the test I remove the LD_PRELOAD
definition and add the build directories in front of the PATH.
I am just curious to understand the limitation.
Thanks
Marco
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