There are three major issues with gcc5-aux on NetBSD 7.0 Beta.
1) The gold linker fails in the middle of the build with an
"operation not permitted" error. I believe this is either an issue
directory with NetBSD 7.0 beta (not seen on 6.99) or an issue with
the binutils 2.25 from pkgsrc.
It turns out that NetBSD 7.0 uses binutils 2.23 which is new enough.
By removing the requirement for using pkgsrc binutils, it will build
until it hits issue #2 which is ...
2) Fortran no longer builds on NetBSD 7.0. Something about an "old"
version of locale symbol. Something changed with locales and gcc5's
Fortran does not like it.
The solution is to turn off fortran and objc options by default. This
means only C, C++, and Ada languages are supported by default. Obviously
this is not a "solution" but it will have to do for now.
3) The signal trampoline has changed. The pattern for the signal
trampoline has been altered and now the NetBSD unwind support can't
recognize the end of the stack. This causes all the stack overflow
and stack check tests to fail.
I didn't do anything here. It requires a lot of work with gdb to figure
out what the new pattern looks like and I don't have any sort of time
for that. Stack handling still works for NetBSD 5 and 6 though.
This compiler package is not like the lang/gcc4* packages, but rather
the lang/gcc-aux package which exists to bring GNAT, the Ada language
compiler. The lang/gcc-aux package is based on gcc-4.9, and this
package is based on gcc-5. This is the first gcc5 package in pkgsrc,
and it does support C, C++, ObjC, and Fortran in addition to Ada thus
it is very useful, but it does have a different purpose than other
gcc ports.
This port has had minimal testing. I verified GNAT passes 100% of the
testsuite on NetBSD 6.1/amd64, but it has not been tested on any
NetBSD 5, 7.0 or 7.99 platform yet. I don't have any hardware, so it
will require using a VM or having others report failure/success. Due
to similarity with lang/gcc-aux, chances are good that it will build
and function properly on other platforms.
See http://gcc.gnu.org/gcc-5/changes.html for more information about
improvements over the gcc-4.9 series.
