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From: "Wojciech Meyer" <Wojciech.Meyer@arm.com>
To: "'Martin Sebor'" <msebor@gmail.com>
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Subject: RE: patch for STDCXX-1051
Date: Tue, 8 Mar 2011 15:10:43 -0000
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> > 2) Removed the changes to the link and compile_then_link
> >     functions. Because of the comments within them these
> >     were effectively commented out and had no effect.
> > I also don't understand why the chmod +x command is
> > necessary. The linker should set the executable bit after
> > a successful link. There is one linker (HP) that fails (or
> > used to) to delete the output file on failure (maybe when
> > when it crashes). With that linker the only way to tell
> > that the file is bad (other than the exit status of the
> > linker) is by examining the executable bit.

> I don't remember why I did this, but I remember it was something
> that I needed to do, probably it was related somewhat to
> cross-compilation.

Now I know!
The reason behind it, is that our linker which performs linking *does
not* setup executable flag on the destination file. It's an image which
should not be executed directly anyway.

Now, it would be all fine besides that stdcxx build system checks for
this flag here

(..)
etc/config/GNUmakefile.cfg:247:
              elif [ ! -x $$file ] ; then                                \
                  nm -gp $$file.o 2>&1 | grep "T *main *$$" >/dev/null ; \
                  test -f $$file.o -a ! $$? -eq 0 ;                      \
              else                                                       \
                  echo "./$$file" >>$(LOGFILE) ;                         \
                  LD_LIBRARY_PATH=3D$$LD_LIBRARY_PATH:. ;                  =
\
                  LIBPATH=3D$$LIBPATH:. ;                                  =
\
                  export LIBPATH LD_LIBRARY_PATH ;                       \
                  text=3D`./$$file` ;                                      =
\
              fi;                                                        \
(..)

So, I needed to do it manually to ensure it does search for
that. Using this shell trickery everything seems to work fine.

Let me know your thoughts.

Thanks!
Wojciech