#703: all binaries built by ghc have executable stacks ----------------------------+---------------------------------------------- Reporter: duncan | Owner: ezyang Type: merge | Status: merge Priority: normal | Milestone: 6.6.1 Component: | Version: 7.6.3 Compiler (NCG) | Keywords: Resolution: | Architecture: Unknown/Multiple Operating System: Linux | Difficulty: Moderate (less than a day) Type of failure: | Blocked By: None/Unknown | Related Tickets: Test Case: N/A | Blocking: | ----------------------------+---------------------------------------------- Comment (by ezyang): Hm, that's not right. I'll need some of your assistance: please run `ghc --make example.hs -v -fforce-recomp -keep-tmp-files` (where example.hs is some trivial Haskell program) and look at the output. You should see something like: {{{ *** C Compiler: '/usr/bin/gcc' '-fno-stack-protector' '-Wl,--hash-size=31' '-Wl,--reduce- memory-overheads' '-c' '/tmp/ghc1284_0/ghc1284_0.c' '-o' '/tmp/ghc1284_0/ghc1284_0.o' '-DTABLES_NEXT_TO_CODE' '-I/usr/lib/ghc/include' *** C Compiler: '/usr/bin/gcc' '-fno-stack-protector' '-Wl,--hash-size=31' '-Wl,--reduce- memory-overheads' '-c' '/tmp/ghc1284_0/ghc1284_1.s' '-o' '/tmp/ghc1284_0/ghc1284_1.o' '-DTABLES_NEXT_TO_CODE' '-I/usr/lib/ghc/include' }}} if you scroll up a little bit. Run `readelf -S` on both of the object files and check if `.note.GNU-stack` is present. The bug I saw in HEAD was `/tmp/ghc1284_0/ghc1284_1.s` did not have the appropriate `.note.GNU- stack` applied. If you see something different maybe something else has changed between 7.6 and HEAD. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/703#comment:21 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler