You can try using ghc directly (instead of cabal) so that you have full
control over what flags are passed, like this:
ghc -fPIC -dynamic -package xx -c plugin.hs
ld -shared -Bsymbolic -L<path to rts lib> -lHSrts-ghc8.0.2 -o plugin.so
plugin.o
If this works then you can find what is wrong/different with your cabal
setup by using verbose flags and looking at what is being passed to ghc.
-harendra
On 10 April 2017 at 18:14, Lana Black
Hello,
I'm working on a Haskell plugin (a shared library) for a C program. When I load the plugin, I get the following error:
./open dlopen() failed: /usr/lib64/ghc-8.0.2/ghc-prim-0.5.0.0/libHSghc-prim-0.5.0.0-ghc8.0.2.so: undefined symbol: stg_thawArrayzh
open is just a testing wrapper around dlopen(). I found out that stg_thawArrayzh symbol is exported by the rts, and my library isn't linked to it, and neither is ghc-prim. How do I fix that? Adding -lHSrts-ghc8.0.2 to ld-options doesn't seem to have any effect.
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