No Targets in TargetRegistry

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1

This is from https://stackoverflow.com/questions/48360685/no-targets-in-targetregistry

I have the following code, which should get the default llvm::Target.

auto const targetTriple = llvm::sys::getDefaultTargetTriple();
llvm_module.setTargetTriple(targetTriple);
std::string error;
auto const * target = llvm::TargetRegistry::lookupTarget(targetTriple, error);
if (target == nullptr) {
auto targets = llvm::TargetRegistry::targets();
size_t targetCount = 0;
for (auto const & _ : targets) {
++targetCount;
}
ERROR(Unknown, "llvm::TargetRegistry::lookupTarget failed for " + targetTriple + “. llvm::TargetRegistry::targets() contains " + std::to_string(targetCount) + " elements.”);
}

This code produces this error message:

…
llvm::TargetRegistry::lookupTarget failed for i686-pc-windows-msvc.
llvm::TargetRegistry::targets() contains 0 elements
…

Am I missing a step?

2

Not sure. But when doing this in the C-Api, you’ve to initialize/add the Targets first. It’ll not run with all buildin-targets by default.

As an example: LLVMInitializeX86Target

This is for the C-API, so i think similar things apply to the C++ API the C-API is based on.

3

Hi, have you resolved this issue? I’m running into the same problem as you…

4

Quick question about this, these functions are not in the included header files, so how can I access them from out-of-tree code?