#13030: Build error from following default nixos instructions and -Werror -------------------------------------+------------------------------------- Reporter: mpickering | Owner: Type: bug | Status: new Priority: lowest | Milestone: Component: Compiler | Version: 8.0.1 Keywords: | Operating System: Unknown/Multiple Architecture: | Type of failure: None/Unknown Unknown/Multiple | Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- When building the RTS with the nixos instructions from the wiki (https://ghc.haskell.org/trac/ghc/wiki/Building/Preparation/Linux#NixNixOS) if you enable `Werror` then the build fails with warnings from the rts. For example {{{ rts/Interpreter.c: In function ‘interpretBCO’: rts/Interpreter.c:593:41: error: warning: ‘obj’ may be used uninitialized in this function [-Wmaybe- uninitialized] debugBelch("Returning: "); printObj(obj); }}} Is this something I should worry about? Are there additional flags that I should pass to gcc in order to turn these warnings off? The workaround is compile without `-Werror` and then turn it on once the `rts` has been compiled. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13030 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler