Closed
Description
When a file has a pragma with Cabal macros like
#if MIN_VERSION_template_haskell(2, 7, 0)
it would not loaded by the inferior haskell process because of
error: missing binary operator before token "("
phase `C pre-processor' failed (exitcode = 1)
I suggest detecting this error message and issuing a command :set -optP-include -optPdist/build/autogen/cabal_macros.h as pointed out at http://stackoverflow.com/questions/12546757/how-do-i-use-cabals-min-version-and-other-macros-with-ghci
If the header file is absent, haskell-mode can run a cabal build.