I think this happens if any of the cpp files that are used for IR generation (clang —emit-llvm) includes <iostream>. For decimal support, I’m generating IR code from arrow/util/decimal.cc <http://decimal.cc/> which includes <iostream> (many times in the header file chain).
> On Dec 16, 2018, at 9:14 AM, Ravindra Pindikura <ravin...@dremio.com> wrote: > > Hi, > > I’ve been working on adding decimal support in gandiva - I’m hitting a symbol > resolution error with std::ios_base::Init with the java tests on ubuntu. Any > ideas on what I may be doing wrong ? > > LLVM ERROR: Program used external function '_ZNSt8ios_base4InitC1Ev' which > could not be resolved! > > > I’ve the same test (add two decimals) in three forms : > > 1. Cpp test executable with shared gandiva lib > > Works on both ubuntu and Mac > > 2. Cpp test executable with static gandiva lib > > Works on both ubuntu and Mac > > 3. Java test (internally uses jni over static gandiva lib) > > Works on Mac, but fails on ubuntu !! > > Ubuntu failure : https://travis-ci.org/apache/arrow/jobs/468562791 > > I tried switching to ORC JIT (from MC JIT) but that didn’t help. In the JIT, > the symbol is not found in the process address space for ubuntu+java. For all > the other cases, the symbol is found. > > https://github.com/apache/arrow/pull/2942/files#diff-5ef29a5cabe384645dbf7a9c704aceeaR36 > > Thanks & regards, > Ravindra.
