ghc: Do not add a space in '-U __PIC__'
GHC previously introduced a space here. However, this can in some cases be interpreted as "-U __PIC__" - note that in shell, the -U would still be recognized with an argument, but the argument would be " __PIC__", with a space in front, as opposed to the single string '__PIC__'. In practice most tools seem to handle this OK. But the Coverity Scan analysis tool does not: it errors on the fact that ' __PIC__' is an invalid CPP name to undefine. With this, it seems the Coverity analysis tool can easily analyze the entire GHC build. Signed-off-by: Austin Seipp <email@example.com>
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