[O] [PATCH] org-latex-compile timestamp checks

[Anthony Cowley]

I’ve had some trouble with toggling latex fragment previews in a document on OS 
X. It would sometimes work, sometimes not, so I could just try a few times 
until it worked and get on with things. Looking into it more, the problem seems 
to be with the HFS+ filesystem’s second granularity on file timestamps. The Org 
code checks that the generated file is not older than a (current-time) obtained 
before starting latex compilation, but the truncated time of the generated file 
can indeed be older in the sub-second fields of the timestamp.

The attached patch simply compares timestamps truncated to 1-second precision. 
This does mean that there is the possibility of a false positive in the 
compilation test if a successful compilation is followed up by an unsuccessful 
compilation in less than one second. I do not know if anyone encounters such a 
scenario.

Anthony

0001-lisp-ox-latex.el-PDF-generation-timestamp-check.patch
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