ld error when building esp-llvm as a release build

[ghost]

when building esp-llvm using gcc with build type release (branch: trunk), the ld would fail building target libLTO.so due to RISCVVectorFetchOptimizer refer to undefined symbol llvm::Metadata::dump() const in RISCVVectorFetchIROpt::processOpenCLKernel. But the bug won't appear when building a debug release.

the log:

[ 76%] Linking CXX shared library ../../lib/libLTO.so /usr/bin/ld: ../../lib/libLLVMRISCVCodeGen.a(RISCVVectorFetchOptimizer.cpp.o): in function (anonymous namespace)::RISCVVectorFetchIROpt::processOpenCLKernel(llvm::Function*)': RISCVVectorFetchOptimizer.cpp:(.text._ZN12_GLOBAL__N_121RISCVVectorFetchIROpt19processOpenCLKernelEPN4llvm8FunctionE+0xda9): undefined reference tollvm::Metadata::dump() const' collect2: error: ld returned 1 exit status make[2]: [tools/lto/CMakeFiles/LTO.dir/build.make:146: lib/libLTO.so.9svn] Error 1 make[1]: [CMakeFiles/Makefile2:11926: tools/lto/CMakeFiles/LTO.dir/all] Error 2 make: *** [Makefile:152: all] Error 2

[pranav-prakash]

Unless you have a specific need to target the Hwacha accelerator you should not use this. General support for riscv is present in upstream llvm.

[colinschmidt]

This project isn't being actively developed so I think you will just have to settle for using the Debug build. If you would like to fix this issue I would review a PR for it, but will not have time to fix it myself.

[pranav-prakash]

Just to clarify did you build riscv-trunk (which is the default selected on github) or the (confusingly similar) trunk branch, which is rebased to a newer version of llvm?

For a hacky fix you could try commenting out the ->dump() since that's only for debugging output.

[ghost]

I use the trunk branch. I think I would have a try to modify the dump codes and try again.