问题
I'm running the default installation of Haskell platform on Ubuntu and when I run this example http://www.haskell.org/haskellwiki/Calling_Haskell_from_C "ghc -c -O Safe.hs" is not producing the Safe_stub.o file. I have checked this on a separate installation of Ubuntu on a friends box and on both 32 bit and 64 bit Ubuntu installs.
Can somebody confirm if this is specific to ghc-7.4.1 or Ubuntu installs only?
Thanks!
回答1:
It's a ghc-7.4 (ghc >= 7.2 actually) thing. That doesn't need and produce *_stub.o (or *_stub.c) files anymore. However, the command line for the final compilation has to change
$ ghc -no-hs-main -optc-O test.c Safe.o -o test
You have to tell GHC that the main is not a haskell call.
来源：https://stackoverflow.com/questions/10983728/ghc-7-4-1-not-producing-stub-o-files