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Welcome to OS/en
Check the folder C:\Program Files\Haskell Platform\8.6.5\lib\include
, in it you will find the file HsFFi.h
and possible dependencies.
Note: 1) Use a folder for your project, it is not recommended to use the desktop.
Note: 2) Obviously, I’m considering that you already have downloaded and installed the Haskell.
<Hsffi. h> does not exist in the default directory of includes, usually /usr/include.
– anonimo