Roadmap

[kassane]

Some references for improvements

• Calling C++ from Fortran
• Issues interfacing between C++ and Fortran
• TS 29113 Further
  Interoperability of Fortran with C

Tasks

• solve Windows Issue #2
• add more tests and make examples (Fortran <=> C, C++ & Zig), explore zig-toolchain resources
• add doc (rly?? maybe!)

[kassane]

How to test flang-new on CI (GH-action)?

Now, replace ubuntu-latest to ubuntu-24.04 or wait...

• Support setting up LLVM flang toolchain fortran-lang/setup-fortran#12

[kassane]

Adding more build targets requires changes to this LoC:

ffi-flang-zig/src/lib/Optimizer/CodeGen/Target.cpp

Lines 1112 to 1163 in b127abd

	// Instantiate the overloaded target instance based on the triple value.
	// TODO: Add other targets to this file as needed.
	std::unique_ptr<fir::CodeGenSpecifics>
	fir::CodeGenSpecifics::get(mlir::MLIRContext *ctx, llvm::Triple &&trp,
	KindMapping &&kindMap, const mlir::DataLayout &dl) {
	switch (trp.getArch()) {
	default:
	break;
	case llvm::Triple::ArchType::x86:
	if (trp.isOSWindows())
	return std::make_unique<TargetI386Win>(ctx, std::move(trp),
	std::move(kindMap), dl);
	else
	return std::make_unique<TargetI386>(ctx, std::move(trp),
	std::move(kindMap), dl);
	case llvm::Triple::ArchType::x86_64:
	if (trp.isOSWindows())
	return std::make_unique<TargetX86_64Win>(ctx, std::move(trp),
	std::move(kindMap), dl);
	else
	return std::make_unique<TargetX86_64>(ctx, std::move(trp),
	std::move(kindMap), dl);
	case llvm::Triple::ArchType::aarch64:
	return std::make_unique<TargetAArch64>(ctx, std::move(trp),
	std::move(kindMap), dl);
	case llvm::Triple::ArchType::ppc64:
	return std::make_unique<TargetPPC64>(ctx, std::move(trp),
	std::move(kindMap), dl);
	case llvm::Triple::ArchType::ppc64le:
	return std::make_unique<TargetPPC64le>(ctx, std::move(trp),
	std::move(kindMap), dl);
	case llvm::Triple::ArchType::sparc:
	return std::make_unique<TargetSparc>(ctx, std::move(trp),
	std::move(kindMap), dl);
	case llvm::Triple::ArchType::sparcv9:
	return std::make_unique<TargetSparcV9>(ctx, std::move(trp),
	std::move(kindMap), dl);
	case llvm::Triple::ArchType::riscv64:
	return std::make_unique<TargetRISCV64>(ctx, std::move(trp),
	std::move(kindMap), dl);
	case llvm::Triple::ArchType::amdgcn:
	return std::make_unique<TargetAMDGPU>(ctx, std::move(trp),
	std::move(kindMap), dl);
	case llvm::Triple::ArchType::nvptx64:
	return std::make_unique<TargetNVPTX>(ctx, std::move(trp),
	std::move(kindMap), dl);
	case llvm::Triple::ArchType::loongarch64:
	return std::make_unique<TargetLoongArch64>(ctx, std::move(trp),
	std::move(kindMap), dl);
	}
	TODO(mlir::UnknownLoc::get(ctx), "target not implemented");
	}

References

• Fortran support with FLANG emscripten-core/emscripten#5553 (comment)
• Fortran on WebAssembly