#9116: RTS Linker doesn't recognize .text.unlikely section on Windows -------------------------------------+------------------------------------- Reporter: niklasl | Owner: simonmar Type: bug | Status: new Priority: normal | Milestone: Component: Runtime System | Version: 7.8.2 Keywords: | Operating System: Windows Architecture: Unknown/Multiple | Type of failure: GHC rejects Difficulty: Easy (less than 1 | valid program hour) | Test Case: Blocked By: | Blocking: Related Tickets: | -------------------------------------+------------------------------------- When trying to use a newer gcc with GHC 7.8.2, some .o files are rejected by the linker for containing a .text.unlikely section with the following message: {{{ Loading package text-1.1.1.2 ... ghc.exe: panic! (the 'impossible' happened) (GHC version 7.8.2 for x86_64-unknown-mingw32): loadObj "C:\\Niklas\\src\\Idris-dev\\.cabal-sandbox\\x86_64 -windows-ghc-7.8.2\\text-1.1.1.2\\HStext-1.1.1.2.o": failed Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug ghc.exe: Unknown PEi386 section name `.text.unlikely' (while processing: C:\Niklas\src\Idris-dev\.cabal-sandbox\x86_64-windows- ghc-7.8.2\text-1.1.1.2\HStext-1.1.1.2.o) }}} This comes from the ocGetNames_PEi386 function in rts/Linker.c. There is a list of section names recognized as code sections at line 4146- in that file. The fix is to add .text.unlikely there, or maybe the right solution is to cast the net wider and accept .text.* as code sections. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9116 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler