#8562: Builtin function __builtin___clear_cache is unavailable on GCC 4.2 ------------------------------+-------------------------------------------- Reporter: heatsink | Owner: simonmar Type: bug | Status: new Priority: normal | Milestone: Component: Runtime | Version: 7.7 System | Operating System: MacOS X Keywords: | Type of failure: GHC doesn't work at all Architecture: x86_64 | Test Case: (amd64) | Blocking: Difficulty: Unknown | Blocked By: | Related Tickets: #8561 | ------------------------------+-------------------------------------------- A recent update to the RTS uses the GCC builtin function `__builtin___clear_cache`. This function was introduced in GCC 4.3. In older GCCs that don't have this builtin function, it's treated as an undefined function, leading to a link-time error. My system has GCC 4.2.1, bundled with XCode 3.2.6. The function is called from `rts/sm/Storage.c`. It seems that x86 architectures don't need a cache flush, so a possible fix is to do nothing on GCC < 4.3.6 on x86 architectures. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/8562 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler