wip/gcc45: Please test after recent updates.

Hello,

in the last weeks I have added several fixes which should help
in building the package on all platforms. I did a successful build
on Scientific Linux 6.0 amd64 besides NetBSD 5.1 and current (i386
and amd64). I am especially interested in feedback from DragonflyBSD
where pkgsrc is the default package system. 

Java is not build by default. On Linux, package compilation went
fine with java enabled, but bmake install had two issues due to 
libgcj. Someone with interest in the java compiler on Linux should
try to resolve the issue. Fixing this is beyond my resources. 

Fortran users on NetBSD (only i386/amd64) will enjoy the addition
of iso_c_binding support which passed all tests and works well on
two packages that I use for my scientific work. I have sent patches
to the gfortran list. Only one file of the gfortran testsuite shows
a test failure (default_format_denormal_1.f90) which is known to fail
on FreeBSD as well, due to missing features in printf. I will try to
get NetBSD added to the XFAIL section in the dejagnu testsuite, making
gfortran-4.5.2 on NetBSD free of any unexpected failure. 

Have fun,

Kai-Uwe Eckhardt
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