[LLVMdev] Problem with InsertPointGuard ABI? (original) (raw)

Paweł Bylica chfast at gmail.com
Tue Jul 21 10:06:57 PDT 2015

On Tue, Jul 21, 2015 at 6:58 PM Justin Bogner <mail at justinbogner.com> wrote:

Paweł Bylica <chfast at gmail.com> writes: > On Tue, Jul 21, 2015 at 6:30 PM Justin Bogner <mail at justinbogner.com> wrote: >> Paweł Bylica <chfast at gmail.com> writes: >>> On Tue, Jul 21, 2015 at 5:55 PM Justin Bogner <mail at justinbogner.com> wrote: >>>> FWIW, llvm-config --assertion-mode will tell you whether or not your >>>> LLVM was built with or without NDEBUG. >>> >>> That's not true in all cases. In case CMAKEBUILDTYPE=Release, >>> LLVMENABLEASSERTIONS=Off and CMAKECXXFLAGSRELEASE="" >>> llvm-config reports asserts as off but NDEBUG flag is not set. >> >> Um, okay, but why would you set CMAKECXXFLAGSRELEASE=""? That >> doesn't make any sense... > > I agree, it make no sense. But homebrew actually does that: > https://github.com/Homebrew/homebrew/blob/master/Library/Homebrew/formula.rb#L615

That sounds very broken - maybe ask them to fix it?

I've fixed that for the LLVM formula. https://github.com/Homebrew/homebrew/blob/master/Library/Formula/llvm.rb#L140

In any case, llvm-config seems to correctly report asserts as ON in this case, despite the configuration being completely bogus:

In the same time the shared cmake file LLVMConfig.cmake will have LLVM_ENABLE_ASSERTIONS set to On.

% cmake -G Ninja ../llvm -DCMAKEBUILDTYPE=Release -DLLVMENABLEASSERTIONS=Off -DCMAKECXXFLAGSRELEASE="" ... % ninja llvm-config [94/94] Linking CXX executable bin/llvm-config % ./bin/llvm-config --assertion-mode ON The code that prints this just checks NDEBUG: llvm-config.cpp:320: > } else if (Arg == "--assertion-mode") { > #if defined(NDEBUG) > OS << "OFF\n";_ _> #else > OS << "ON\n";_ _> #endif -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20150721/63fcb33d/attachment.html>

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