[llvm-dev] link error for analysis pass

[Alex S via llvm-dev]

Thanks a lot! Mehdi. I tried to change the LLVMBuild.txt. However, it
doesn't help under Makefile/autotools.
I will try cmake to rebuild the system again.

Thanks again,
Alex

On Fri, Dec 4, 2015 at 5:50 PM, Mehdi Amini <mehdi.amini at apple.com> wrote:

>
> On Dec 4, 2015, at 2:36 PM, Alex S <alexmountain13 at gmail.com> wrote:
>
> Hi Mehdi,
>
> I meant when I build the LLVM and it will give the following errors:
>
> make[2]: Entering directory `/home/alex/new/llvm-obj/tools/llc'
> llvm[2]: Linking Debug+Asserts executable llc
> /home/alex/new/llvm-obj/Debug+Asserts/lib/libLLVMCodeGen.a(Passes.o): In
> function `llvm::TargetPassConfig::addIRPasses()':
> /home/alex/new/llvm-3.1.src/lib/CodeGen/Passes.cpp:295: undefined
> reference to `llvm::createMyAliasAnalysisPass()'
> collect2: ld returned 1 exit status
> make[2]: *** [/home/alex/new/llvm-obj/Debug+Asserts/bin/llc] Error 1
> make[2]: Leaving directory `/home/alex/new/llvm-obj/tools/llc'
> make[1]: *** [llc/.makeall] Error 2
> make[1]: Leaving directory `/home/alex/new/llvm-obj/tools'
> make: *** [all] Error 1
>
>
> Since you created a new library, you need to add it as a dependency
> wherever you’re calling into it: see lib/CodeGen/LLVMBuild.txt
>
> Also, on a side note, the Makefile/autotools build is deprecated, you may
> want to look at cmake.
>
> —
> Mehdi
>
>
>
> Thanks,
> Alex
>
>
> On Fri, Dec 4, 2015 at 5:17 PM, Mehdi Amini <mehdi.amini at apple.com> wrote:
>
>>
>> > On Dec 4, 2015, at 1:37 PM, Alex S via llvm-dev <
>> llvm-dev at lists.llvm.org> wrote:
>> >
>> > Hi all,
>> >
>> > I create a folder containing my new alias analysis pass in the
>> lib/Analysis folder of the source tree.
>> > I mimic the way IPA did to create a LLVMipa.a library. That is, I write
>> a Makefile to create my library
>> > and I change the Makefile correspondingly in the Analysis folder.
>> >
>> > However, when I want to use my new alias analysis in the Codegen. The
>> compiler will complain
>> > "undefined error" during the link phase.  Could anyone point me out
>> where I need to change in order
>> > to use my new alias analysis pass in the Codegen?
>>
>>
>> Can you provide the link command that fails and the output?
>>
>>
>> Mehdi
>>
>>
>
>
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