llvm dev - Sep 2019 - (How) Can I add C standard libraries to JIT?

When I declare some functions in my IR code which belongs to the C standard
library(printf for example), the JIT will report that symbol cannot found.

So is there any way I can add these libraries to my JIT?

P.S. When I using lli, the printf will work, I guess lli is a JIT(right?)
and it somehow knows where to find the symbol printf
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+Lang Hames <lhames at gmail.com> , JITer of JITs.

I believe there's some kind of resolver you can add that finds symbols in
the current process. Yes, lli uses some of the same pieces of JIT
infrastructure so you could go look at its source code to see how it's
managing this.

On Wed, Sep 18, 2019 at 2:23 AM Yafei Liu via llvm-dev <
llvm-dev at lists.llvm.org> wrote:
> When I declare some functions in my IR code which belongs to the C
> standard library(printf for example), the JIT will report that symbol
> cannot found.
>
> So is there any way I can add these libraries to my JIT?
>
> P.S. When I using lli, the printf will work, I guess lli is a JIT(right?)
> and it somehow knows where to find the symbol printf
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>
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Hi Yafei,
As david told, you can make the symbols of your host process visible to the
JIT'd code through DynamicLibrarySearchGenerator::getForCurrentProcess.


On Thu, 19 Sep 2019 at 00:46, David Blaikie via llvm-dev <
llvm-dev at lists.llvm.org> wrote:
> +Lang Hames <lhames at gmail.com> , JITer of JITs.
>
> I believe there's some kind of resolver you can add that finds symbols
in
> the current process. Yes, lli uses some of the same pieces of JIT
> infrastructure so you could go look at its source code to see how it's
> managing this.
>
> On Wed, Sep 18, 2019 at 2:23 AM Yafei Liu via llvm-dev <
> llvm-dev at lists.llvm.org> wrote:
>
>> When I declare some functions in my IR code which belongs to the C
>> standard library(printf for example), the JIT will report that symbol
>> cannot found.
>>
>> So is there any way I can add these libraries to my JIT?
>>
>> P.S. When I using lli, the printf will work, I guess lli is a
>> JIT(right?) and it somehow knows where to find the symbol printf
>> _______________________________________________
>> LLVM Developers mailing list
>> llvm-dev at lists.llvm.org
>> https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>>
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>
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