[llvm-dev] [RFC] Queries for LLVM version

[Hal Finkel via llvm-dev]

On 01/26/2017 12:45 AM, Nemanja Ivanovic via llvm-dev wrote:
> This has actually come up in the context of a JIT, but I think that 
> having the functionality in general could be useful.
>
> Currently, there does not appear to be an API in LLVM to query for 
> LLVM version information. In the particular context where this came 
> up, LLVM is used as a shared library and various functionality (and 
> bug fixes) used by the JIT is available in various LLVM versions. So 
> it would be quite convenient to be able to dynamically determine the 
> version that happens to be loaded.
>
> Honestly, I am not completely clear on what the best place for 
> something like this would be, but it appears that the following seems 
> like a natural choice:
>
> llvm::VersionPrinter in lib/Support/CommandLine.cpp already queries 
> this data so it might make sense for it to expose the following API's 
> (as part of VersionPrinter, accessed through the instance):
> llvm::cl::getVersionMajor()
> llvm::cl::getVersionMinor()
> llvm::cl::getVersionPatch()

Makes sense to me, although I see no reason for the functions to be in 
the 'cl' namespace.

  -Hal

>
>
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-- 
Hal Finkel
Lead, Compiler Technology and Programming Languages
Leadership Computing Facility
Argonne National Laboratory

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