[Bug libgcj/28009] New: libjava cannot be cross-built; X_CFLAGS includes /usr/include

["tbm at cyrius dot com" <gcc-bugzilla at gcc dot gnu dot org>]

libjava fails to cross-build because the Makefile includes an -I/usr/include. 
Removing that makes it work.  I've seen this a number of times now, i386 to
alpha-linux, i386 to m68-linux, etc.  The problem is this in the Makefile:
X_CFLAGS =  -I/usr/include
and X_CFLAGS is part of AM_CXXFLAGS which is where it causes the problem.

I configured gcc with:
/home/tbm/scratch/gcc/configure --disable-bootstrap \
  --enable-languages=c,c++,java --target=alpha-linux-gnu


-- 
           Summary: libjava cannot be cross-built; X_CFLAGS includes
                    /usr/include
           Product: gcc
           Version: 4.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libgcj
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: tbm at cyrius dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28009