On Fri, May 27, 2011 at 04:35:17PM +0100, Simon Marlow wrote:
Next best idea is to make GHC use repeatable temporary .c& .o file names for each invocation. There is already a unique temporary directory where all the the temporary files are created. This suggests I do not need to worry about adversarial races. So GHC just need to avoid racing with itself. I see a couple of options:
1) newTempName should create a new subdirectory for each call and the return a fixed name inside of this (so /tmp/ghc28016_0/ghc28016_0.c above would become /tmp/ghc28016_0/0/dummy.c) 2) mkExtraCObj could compute some hash function of its xs argument (C program text) and then create a file named, e.g. /tmp/ghc28016_0/38eb8d8eb0abe9c828ba60983e2a97f7a069ec41.c
Which of these two looks better? Other ideas?
The first is easier, and would be fine with me.
An alternative could be to just strip the single `symbol' off the object file (using something like strip -N ...). I didn't yet test this for real. Ciao, Kili