Missing C library

[Phyks]

Hi,

I don't know much about Haskell, so I am not sure about the correct way to fix it.

When trying to build libpandoc on Arch, I got * Missing C library: HSrts-ghc7.10.2, very similar to https://stackoverflow.com/questions/34267376/haskell-missing-c-library-on-arch-linux-works-on-ubuntu.

I fixed it by moving the extra-libraries option to Ghc-Options. Also, I have GHC 8.0.2 and not GHC 7.10.2, so here is my diff:

diff --git a/libpandoc.cabal b/libpandoc.cabal
index 560a596..4c11ef2 100644
--- a/libpandoc.cabal
+++ b/libpandoc.cabal
@@ -29,9 +29,8 @@ Executable libpandoc.so
   Main-Is:              LibPandoc.hs
   if !os(windows)
     CC-Options:         -fPIC
-  Ghc-Options:          -no-hs-main -shared
+  Ghc-Options:          -no-hs-main -shared -lHSrts-ghc8.0.2
   if !os(windows)
     Ghc-Options:        -dynamic
-    extra-libraries:    HSrts-ghc7.10.2
   else
     extra-libraries:    HSrts

Not sure about the clean way to handle it :/ Should we really edit the libpandoc.cabal file at each GHC update?

[ShabbyX]

The Makefile does a sed to automatically change $compiler to the version that is installed, which sucks as it leaves the libpandoc.cabal file dirty. That's how it seems to have mistakenly gotten committed. About moving it from extra-libraries to Ghc-Options, I don't know. I remember windows was a bitch about everything, so it should at least be only added in the !os(windows) part (after -dynamic for example). Also, the answer to that question talks about issues with what you did if there is an executable (which a .so file is, but there is ambiguity here).

As long as it builds and works for you, feel free to use this method locally. I'm afraid I might break the build elsewhere by taking this.

[Phyks]

Ok, no problem for this. At least the solution is listed somewhere in the issues if some encounters it again.

Maybe the Makefile should generate the libpandoc.cabal file from a template as well, but apparently being compatible with all OSes is a pity :/

[ShabbyX]

As always, windows is the reason we can't have nice things.