There are several bugfixes in this update, but the most important one is
to ensure __start_ and __stop_ symbols for linker sets and kernel module
metadata are always emitted in object files:
http://llvm.org/bugs/show_bug.cgi?id=9292
Before this fix, if you compiled kernel modules with clang, they would
not be properly processed by kldxref, and if they had any dependencies,
the kernel would fail to load those. Another problem occurred when
attempting to mount a tmpfs filesystem, which would result in 'operation
not supported by device'.
arguments passed to ld, when linking. This was to appease configure
scripts in several ports, that grep for such a -L option in "${CC} -v"
output, to determine the startup objects passed to ld. Note ld itself
does not need to be told about /usr/lib, since it has this path builtin
anyway.
However, if clang is built as a bootstrap tool during buildworld, it
should not use *anything* outside ${WORLDTMP} to include or link with.
The upstream fix to add -L/usr/lib breaks this assumption, and can thus
cause libraries from /usr/lib to be linked in during buildworld.
This can result in buildworld dying during linking of zinject, where it
picks up the wrong copy of libzpool.so, eventually leading to:
/usr/obj/usr/src/tmp/lib/libthr.so.3: undefined reference to `_rtld_get_stack_prot'
Fix this issue by not adding any hardcoded paths, but by looping through
the run-time library path list, which is already correctly set for the
bootstrap phase.
Reported by: datastream.freecity@gmail.com
Pointy hat to: dim
This commit merges the latest LLVM sources from the vendor space. It
also updates the build glue to match the new sources. Clang's version
number is changed to match LLVM's, which means /usr/include/clang/2.0
has been renamed to /usr/include/clang/2.8.
Obtained from: projects/clangbsd
