Re: [GHC] #13541: Make it easier to use the gold linker

#13541: Make it easier to use the gold linker -------------------------------------+------------------------------------- Reporter: bgamari | Owner: (none) Type: feature request | Status: patch Priority: highest | Milestone: 8.2.1 Component: Compiler | Version: 8.0.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: #13810, #13739 | Differential Rev(s): Phab:D3449, Wiki Page: | Phab:D3694 -------------------------------------+------------------------------------- Comment (by Ben Gamari ): In [changeset:"960918bd1f7e3811845a525ba85bbd390ddf28c8/ghc" 960918bd/ghc]: {{{ #!CommitTicketReference repository="ghc" revision="960918bd1f7e3811845a525ba85bbd390ddf28c8" Add -fuse-ld flag to CFLAGS during configure The decisions made by configure later in the script may depend upon the linker used. Consequently, it is important that configure uses the same linker as GHC will eventually use. For instance, on Nix I found that a program requiring `libpthread` would link fine with only `-lrt` when linked with BFD ld. However, with gold we needed to explicitly provide the `-lpthread` dependency. Presumably the former would happily loaded any `NEEDED` libraries whereas the latter wants them explicitly given. Regardless, since `configure`'s `NEED_PTHREAD_LIB` check didn't use the `-fuse-ld` flag that GHC would eventually use, we inferred the wrong value, resulting in link errors later in the build. Test Plan: Validate Reviewers: austin, hvr Subscribers: rwbarton, thomie, erikd GHC Trac Issues: #13541 Differential Revision: https://phabricator.haskell.org/D3694 }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13541#comment:31 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler