Build of 4.1.0 in cross env

[David Daney]

Andrew Haley wrote:
> FERANDELLE Pascal writes:
>  > 
>  > 
>  > Andrew Haley a écrit :
>  > 
>  > > FERANDELLE Pascal writes:
>  > >  > I am trying to build GCC 4.1.0 for a powerpc-linux target, on PC/Linux, and I have problems in the build of java parts.
>  > >  > During the build, there are calls to powerpc-linux-gcj, powerpc-linux-gcjh commands, which do not exist, as we are just building it ...
>  > >
>  > > We don't know what you're doing.
>  > >
>  > > You have to tell us *exactly* how you configured and built.  Maybe
>  > > then we'll be able to figure out what is cauing the problem.
>  > >
>  > >
>  > 
>  > - extraction of gcc-core-4.1.0.tar, gcc-g++-4.1.0.tar and gcc-java-4.1.0.tar
>  > 
>  > - ./configure --with-sysroot=/VMPC/BlueCat --enable-langages=c,java --target=powerpc-linux
>  > (my Linux PowerPC environment is under /VMPC/BlueCat)
> 
> Configuring gcc in the srcdir is truly scary, and I'm surprised it
> works at all, but I don't know that's the cause of your problem.
> 
> "First, we highly recommend that GCC be built into a separate
> directory than the sources which does not reside within the source
> tree. This is how we generally build GCC; building where srcdir ==
> objdir should still work, but doesn't get extensive testing; building
> where objdir is a subdirectory of srcdir is unsupported.
> 
> "To configure GCC:
> 
>         % mkdir objdir
>         % cd objdir
>         % srcdir/configure [options] [target]"
> 
>  > - modification ot the LDFLAGS_FOR_TARGET variable in the Makefile, to put :
>  >     LDFLAGS_FOR_TARGET = -L/VMPC/BlueCat -L/VMPC/BlueCat/lib -L/VMPC/BlueCat/usr/lib
>  >                                               -Wl,-rpath-link -Wl,/VMPC/BlueCat
>  >                                               -Wl,-rpath-link -Wl,/VMPC/BlueCat/lib
>  >                                               -Wl,-rpath-link -Wl,/VMPC/BlueCat/usr/lib
>  > 
>  >  (without this, lots of libraries are not found during link phases
>  >  of the build, and I also have to copy two libraries of my Linux
>  >  PPC environment to /usr/local/powerpc-linux/lib directory)
> 
> I don't like this either.  --with-sysroot is supposed to do the right
> thing here.  I would investigate this a bit further.
> 
> It sounds to me as though gcj's build system may be broken for cross
> compilers in the 4.1 release, but I'd like you to try a more
> conventional configure and make first.

FWIW MIPS cross compilers build out-of-the-box with 4.1 (at least for 
me), but I always set --prefix to the same value as --with-sysroot.

David Daney