#7143: ghc-7.6.0.20120810-x86_64-windows.exe -> ghc can't figure out LLVM version -------------------------------------------------+------------------------- Reporter: cetinsert | Owner: Type: bug | dterei Priority: high | Status: new Component: Compiler (LLVM) | Milestone: 7.8.1 Resolution: | Version: Operating System: Windows | 7.6.1-rc1 Type of failure: Incorrect warning at | Keywords: llvm compile-time | Architecture: Test Case: | Unknown/Multiple Blocking: | Difficulty: | Unknown | Blocked By: | Related Tickets: -------------------------------------------------+------------------------- Comment (by schyler): Using the HP ghc on Windows you get an error like this (even if llc and opt are directly callable from the *same* command line): {{{ <no location info>: Warning: Couldn't figure out LLVM version! Make sure you have installed LLVM }}} This occurs with all versions of llvm. ghc --info is interesting: {{{ [("Project name","The Glorious Glasgow Haskell Compilation System") ,("GCC extra via C opts"," -fwrapv") ,("C compiler command","$topdir/../mingw/bin/gcc.exe") ,("C compiler flags"," -fno-stack-protector -Wl,--hash-size=31 -Wl ,--reduce-memory-overheads") ,("ar command","$topdir/../mingw/bin/ar.exe") ,("ar flags","q") ,("ar supports at file","YES") ,("touch command","$topdir/touchy.exe") ,("dllwrap command","$topdir/../mingw/bin/dllwrap.exe") ,("windres command","$topdir/../mingw/bin/windres.exe") ,("perl command","$topdir/../perl/perl.exe") ,("target os","OSMinGW32") ,("target arch","ArchX86") ,("target word size","4") ,("target has GNU nonexec stack","False") ,("target has .ident directive","True") ,("target has subsections via symbols","False") ,("LLVM llc command","") ,("LLVM opt command","") ,("Project version","7.6.3") ,("Booter version","7.4.1") ,("Stage","2") ,("Build platform","i386-unknown-mingw32") ,("Host platform","i386-unknown-mingw32") ,("Target platform","i386-unknown-mingw32") ,("Have interpreter","YES") ,("Object splitting supported","YES") ,("Have native code generator","YES") ,("Support SMP","YES") ,("Unregisterised","NO") ,("Tables next to code","YES") ,("RTS ways","l debug thr thr_debug thr_l thr_p dyn debug_dyn thr_dyn thr_debug_dyn") ,("Leading underscore","YES") ,("Debug on","False") ,("LibDir","C:\\Program Files (x86)\\Haskell Platform\\2013.2.0.0\\lib") ,("Global Package DB","C:\\Program Files (x86)\\Haskell Platform\\2013.2.0.0\\lib\\package.conf.d") ,("Gcc Linker flags","[\"-Wl,--hash-size=31\",\"-Wl,--reduce-memory- overheads\"]") ,("Ld Linker flags","[\"--hash-size=31\",\"--reduce-memory-overheads\"]") ] }}} For some reason the commands to interface with llc/opt are empty. I was able to work around it by doing this; `alias ghc-llvm="ghc -pgmlo opt -pgmlc llc -fllvm"` ... and then using `ghc-llvm` whenever I wanted to use llvm. This works perfectly. The 64-bit GHC from GHC HQ has the same problem, and the same workaround works for me. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/7143#comment:8 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler