[LLVMdev] How to identify LLVM version?

[Óscar Fuentes]

Kangkook Jee <aixer77 at gmail.com> writes:

> Hi, all
>
> I'd like to write a code that can build different codes based on LLVM version. 
> Like code snippets in the below. 
>
> #ifdef __LLVM_29__
>    PHINode *PN = Builder.CreatePHI (Type::getDoubleTy(getGlobalContext()), 2, "iftmp");
> #elif __LLVM_28__
>    PHINode *PN = Builder.CreatePHI (Type::getDoubleTy(getGlobalContext()), "iftmp");
> #else
>    assert ("wrong version");
> #endif
>
> I've been trying to find something like these (__LLVM_29__,
> __LLVM_28__), but I couldn't find them yet.

llvm/Config/config.h defines PACKAGE_VERSION to a string like "3.0", but
I'm afraid that it is not very convenient for your purposes.

To the developers: maybe it is a good idea to define something like
LLVM_MAJOR_VERSION and LLVM_MINOR_VERSION ? Preferably in llvm-config.h