The only pre-processing is what's caused by using the cabal directive
"Extensions: CPP". Using "./setup haddock --verbose ...", I get lines like
c:\ghc\ghc-6.6\bin\ghc.exe -E -cpp -optP-P -o
dist\build\tmp\src\Graphics\UI\TV\Input.hs src\Graphics\UI\TV\Input.hs
-Dmingw32_BUILD_OS -Dmingw32_HOST_OS -Di386_BUILD_ARCH -Di386_HOST_ARCH
-D__GLASGOW_HASKELL__=606 -D__HADDOCK__
When I try this preprocessing myself, I find that I *do not* get the Haskell
line pragma:
bash-3.2$ ghc -E -cpp -optP-P -o z src/Graphics/UI/TV/Input.hs
-Dmingw32_BUILD_OS -Dmingw32_HOST_OS -Di386_BUILD_ARCH -Di386_HOST_ARCH
-D__GLASGOW_HASKELL__=606 -D__HADDOCK__; head -3 z
{-# OPTIONS -fglasgow-exts -cpp #-}
----------------------------------------------------------------------
Fiddling with flags, I see that -optP-P is the culprit. Removing it:
bash-3.2$ ghc -E -cpp -o z src/Graphics/UI/TV/Input.hs -Dmingw32_BUILD_OS
-Dmingw32_HOST_OS -Di386_BUILD_ARCH -Di386_HOST_ARCH
-D__GLASGOW_HASKELL__=606 -D__HADDOCK__; head -3 z
# 1 "src/Graphics/UI/TV/Input.hs"
# 1 "<built-in>"
# 1 "<command line>"
bash-3.2$
Any ideas? - Conal
On 1/9/07, Duncan Coutts
(oops, I meant to reply to the list as well as to Conal)
On Mon, 2007-01-08 at 22:26 -0800, Conal Elliott wrote:
I pre-process my source code before handing to haddock. The %{FILE} directive for --source-comments etc uses the actual preprocessed file name rather than the the original, which is not what I want. Is this just an oversight?
If your pre-processor uses the C or Haskell line pragmas then haddock (as of version 0.8) will know the original file name and the links to source will work (I've tested it).
So the question is, what pre-processor are you using, and how can we persuade it to emit C or Haskell line pragmas. cpp can do it, as can cpphs, hsc2hs, c2hs, alex, happy etc.
It may be that they don't all do it by default at the moment, or that Cabal doesn't instruct them to do it by default. Previous versions of haddock didn't cope with C style line pragmas iirc so I think they used to be disabled for cpp/cpphs.
Duncan
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