Since the anti-ROP mechanism in libc [2] was added in late April, -current with 
read-only /usr produces something like the following message:
re-ordering libraries:install: /usr/lib/INS@OPOjn7ck17: Read-only file system

I thought I was following best practice by mounting /usr, /usr/X11R6, and 
/usr/local read-only.  I submitted a bug report and a patch to fix my problem 
[2] but have had no response.

[1]<http://marc.info/?l=openbsd-tech&m=146159002802803&w=2>
[2]<http://marc.info/?l=openbsd-bugs&m=146195109602946&w=2>

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