Comment 1 for bug 831256

I'm not sure what happened here really, and I can't recreate it locally. It also appears to have built successfully in the archive since this too.

The error is because the wrong path for the GCC headers is passed (GCC_PLUGIN_HEADERS="-I/lib/x86_64-linux-gnu//plugin/include), but this comes directly from this line, and it works ok here:

plugin_dir := $(shell $(CC) -print-file-name= | sed 's,\(/4\.[0-9]\)\.[0-9],\1,')/plugin