#11744: Latest Xcode update violates POSIX compliance of `nm -P` ---------------------------------+---------------------------------------- Reporter: hvr | Owner: Type: bug | Status: new Priority: highest | Milestone: Component: Build System | Version: Resolution: | Keywords: Operating System: MacOS X | Architecture: Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): phab:D2113 Wiki Page: | ---------------------------------+---------------------------------------- Comment (by ilovezfs): Unsurprisingly, especially since the bug is in the upstream LLVM code, it's not fixed in 7.3.1. However, this may be a relatively simple workaround until it's fixed. On OS X, these all appear to have the same output: With Xcode >= 7.3, {{{ nm $k | awk '{ print $NF" "$2" "$1" 0" }' llvm-nm $k | awk '{ print $NF" "$2" "$1" 0" }' nm-classic $k | awk '{ print $NF" "$2" "$1" 0" }' nm-classic -P $k }}} With Xcode < 7.3, {{{ nm $k | awk '{ print $NF" "$2" "$1" 0" }' nm -P $k }}} So {{{ if darwin, `nm $k | awk '{ print $NF" "$2" "$1" 0" }'` else `nm -P` }}} should give the same output regardless of platform or Xcode version. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11744#comment:16 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler