On Fri, 27 Jan 2012, Faheem Mitha wrote:
Hi Dirk,
After some time spent trying to debug this, I discovered I can make the hang
disappear by defining (or possibly redefining) get_seed and set_seed. If I
rewrite my example to be instead
[snippage]
taking the definitions of `get_seed` and `set_seed` directly from
`src/nmath/standalone/sunif.c` then the hang disappears. Now, I used set_seed
many times before, and have never needed to do this before.
However, when thinking about this a little more, I realised that though I
have used `set_seed` many times, I didn't have any idea where it was defined.
I then did a `grep -r set_seed *` in the R sources, and the only definition
that came up was the `src/nmath/standalone/sunif.c` one. So, now I'm puzzled.
Where is the definition I have been using?
I don't mean to beat this to death, but if there was already a version of
set_seed defined, I would have expected the linker to complain about
duplicate definitions and it didn't, which is puzzling.
So, to summarize:
set_seed must be defined somewhere in the R sources, since otherwise my
code (see my original example) would not have worked.
However, if it was defined, the linker should have given an error when I
added a definition, which it didn't.
Also, I can't actually find a definition of set_seed or get_seed in the R
sources, aside from src/nmath/standalone/sunif.c, which is an example
file.
I must be missing something. Explanations appreciated.
Regards, Faheem Mitha
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