[Rd] Note: no visible definition
mick.jordan at oracle.com
Sun Apr 10 00:54:25 CEST 2016
On 4/9/16 12:13 PM, Duncan Murdoch wrote:
> On 09/04/2016 2:55 PM, Mick Jordan wrote:
>> On 4/9/16 10:54 AM, Dirk Eddelbuettel wrote:
>>> On 9 April 2016 at 10:28, Mick Jordan wrote:
>>> | Can someone explain a message of this form from an rscript execution:
>>> | Note: no visible global function definition for 'foo'
>>> | This happens right at the start of execution. 'foo' is only
>>> executed in
>>> | a branch of an 'if' that is not reached with the particular arguments
>>> | passed to the script. If I source the script in a shell and run it
>>> I do
>>> | not get the message.
>>> Guess: your shell session has an object foo. It will be referenced.
>>> Your Rscript, running from 'empty' never defines foo. And codetools
>>> you that because more often than not it is error. Sometimes
>>> codetools gets
>>> it wrong too, ie with you peek into data structure via evaluation
>>> tricks or
>>> with simple with(mydataframe, columnOne).
>> No, the symbol is acytually defined in a package that is not loaded when
>> running under GnuR. But I still don't understand what is even trying to
>> find the symbol in an execution path that doesn't reference it. I'm not
>> sure what you mean by codetools, but is it examining my source code
>> somehow before it is executed? That would be unexpected at best.
> That message comes from the compiler package, so presumbly you (or
> Rscript) are trying to compile something. You can't have undefined
> references in compiled code.
> Duncan Murdoch
Ah, so if the jit is enabled that would do it? we are no explicitly
compiling anything but it turns out I was setting R_ENABLE_JIT (accidently).
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