#11445: Turn on SplitSections by default -------------------------------------+------------------------------------- Reporter: ezyang | Owner: Type: task | Status: new Priority: normal | Milestone: 8.2.1 Component: Build System | Version: 8.0.1-rc1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: 11285 Related Tickets: | Differential Rev(s): Phab:D1800 Wiki Page: | -------------------------------------+------------------------------------- Comment (by awson): The summary (for Windows): 1. I always used patched binutils and never used separate linker scripts, thus can't comment on potential problems with the latter. 2. On 64-bit GHC I don't use `-split-objs` at all and use `-split- sections` exclusively for almost a year and I never had any problems with this. The only '''important''' thing one should remember is that we sometimes need to supply `-opta-Wa,-mbig-obj` to GHC to make it build correct object files (I know 2 package which require this: `template- haskell` when building GHC itself and `haskell-src-exts`). One possible option is to always use this flag if `-split-sections` is used. 3. `-split-sections` doesn't introduce any noticeable overhead when compiling and thus is '''dramatically''' faster than `-split-objs` when building packages, it is slightly slower when linking final executables though. 4. 64-bit GHC itself can be built in release configuration with `-split- objs` replaced by `-split-sections` absolutely with no problems (only `-opta-Wa,-mbig-obj` should be added to `ghc-options` in `template- haskell` cabal file). 32-bit GHC building process is less smooth and requires a special handling of `template-haskell` package (one needs to recompile `Language.Haskell.TH.Syntax` module in profiling configuration with `-split-objs`). Overall, building release GHC itself with `-split- sections` is '''much''' faster than with `-split-objs`. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11445#comment:18 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler