#9010: TemplateHaskell leads to an "unknown symbol" error -------------------------------------+------------------------------------- Reporter: Feuerbach | Owner: Type: bug | Status: closed Priority: normal | Milestone: Component: Compiler | Version: 7.6.3 Resolution: fixed | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by Darwin226): I'm facing the same issue on Windows with both GHC 7.10.3 and GHC 8.0.1. In my case it's the curl library. I've provided a way to reproduce this in this ticket https://github.com/commercialhaskell/stack/issues/2752 The error I'm getting is the following {{{ ghc.EXE: unable to load package `curl-1.3.8' ghc.EXE: C:\Users\darwi\AppData\Local\Programs\stack\x86_64-windows\msys2-20150512\mingw64\lib\libcurl.a: unknown symbol `stricmp' ghc.EXE: Could not on-demand load symbol 'curl_strequal' ghc.EXE: C:\Users\darwi\AppData\Local\Programs\stack\x86_64-windows\msys2-20150512\mingw64\lib\libcurl.a: unknown symbol `curl_strequal' ghc.EXE: Could not on-demand load symbol '.refptr.Curl_cstrdup' ghc.EXE: C:\Users\darwi\AppData\Local\Programs\stack\x86_64-windows\msys2-20150512\mingw64\lib\libcurl.a: unknown symbol `.refptr.Curl_cstrdup' ghc.EXE: Could not on-demand load symbol 'curl_slist_free_all' ghc.EXE: C:\Users\darwi\AppData\Local\Programs\stack\x86_64-windows\msys2-20150512\mingw64\lib\libcurl.a: unknown symbol `curl_slist_free_all' ghc.EXE: Could not on-demand load symbol 'Curl_ssl_connect_nonblocking' ghc.EXE: C:\Users\darwi\AppData\Local\Programs\stack\x86_64-windows\msys2-20150512\mingw64\lib\libcurl.a: unknown symbol `Curl_ssl_connect_nonblocking' ghc.EXE: Could not on-demand load symbol '.refptr.Curl_crealloc' ghc.EXE: C:\Users\darwi\AppData\Local\Programs\stack\x86_64-windows\msys2-20150512\mingw64\lib\libcurl.a: unknown symbol `.refptr.Curl_crealloc' ghc.EXE: Could not on-demand load symbol 'curl_msnprintf' ghc.EXE: C:\Users\darwi\AppData\Local\Programs\stack\x86_64-windows\msys2-20150512\mingw64\lib\libcurl.a: unknown symbol `curl_msnprintf' ghc.EXE: Could not on-demand load symbol '.refptr.Curl_cmalloc' ghc.EXE: C:\Users\darwi\AppData\Local\Programs\stack\x86_64-windows\msys2-20150512\mingw64\lib\libcurl.a: unknown symbol `.refptr.Curl_cmalloc' ghc.EXE: Could not on-demand load symbol 'Curl_verify_windows_version' ghc.EXE: C:\Users\darwi\AppData\Local\Programs\stack\x86_64-windows\msys2-20150512\mingw64\lib\libcurl.a: unknown symbol `Curl_verify_windows_version' ghc.EXE: Could not on-demand load symbol 'Curl_sspi_global_init' ghc.EXE: C:\Users\darwi\AppData\Local\Programs\stack\x86_64-windows\msys2-20150512\mingw64\lib\libcurl.a: unknown symbol `Curl_sspi_global_init' ghc.EXE: Could not on-demand load symbol 'curl_global_init' ghc.EXE: C:\sr\snapshots\df48cbae\lib\x86_64-windows- ghc-8.0.1\curl-1.3.8-B8AxMCtSRkiFrZLK4gerBe\HScurl-1.3.8-B8AxMCtSRkiFrZLK4gerBe.o: unknown symbol `curl_global_init' }}} This is the GHC 8 error. The 7.10.3 is different and shorter but in the same gist. I've seen the `ghc --info` mentioned above and I indeed get `("GHC Dynamic","NO")`. I installed both versions of GHC through stack. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9010#comment:20 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler