[GHC] #12806: curl dependency in conjunction with Template Haskell causes "unknown symbol" errors

[GHC]

#12806: curl dependency in conjunction with Template Haskell causes "unknown
symbol" errors
-------------------------------------+-------------------------------------
           Reporter:  Darwin226      |             Owner:
               Type:  bug            |            Status:  new
           Priority:  normal         |         Milestone:
          Component:  Compiler       |           Version:  8.0.1
           Keywords:                 |  Operating System:  Unknown/Multiple
       Architecture:  x86_64         |   Type of failure:  Compile-time
  (amd64)                            |  crash or panic
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
-------------------------------------+-------------------------------------
 I've reported on this issue to the stack issue tracker here
 https://github.com/commercialhaskell/stack/issues/2752#issuecomment-257378515

 The steps to reproduce are the following
 * Make a new stack project (lts-5.3 in my case). stack new curl-test
 -resolver=lts-5,3
 * Add curl as a dependency to the library.
 * Modify the Lib file to the following

 {{{
 {-# LANGUAGE TemplateHaskell #-}
 module Lib where

 return []

 someFunc :: IO ()
 someFunc = return ()
 }}}

 The error that I get with GHC 8 is this

 {{{
 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'
 }}}

 but this still fails with GHC 7.10.3 with a similar error.

 This is happening on two Windows 10 machines so it's not an isolated case.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12806>
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