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Compilation Targets

Seen's shipped LLVM compiler can build native binaries for the platforms below. Use the canonical target names with seen compile --target=<name>.

Target LLVM Triple Notes
linux-x86_64 x86_64-unknown-linux-gnu Default Linux desktop/server target
linux-arm64 aarch64-unknown-linux-gnu GNU/Linux AArch64 cross target
linux-riscv64 riscv64-unknown-linux-gnu RV64GC Linux GNU, LP64D ABI
windows-x86_64 x86_64-w64-windows-gnu Windows cross-build/package target
macos-x86_64 x86_64-apple-darwin Intel macOS target
macos-arm64 arm64-apple-darwin Apple Silicon macOS target
ios-arm64 arm64-apple-ios iOS device target
ios-sim-arm64 arm64-apple-ios-simulator iOS simulator target
android-arm64 aarch64-linux-android Android NDK ARM64 target

The canonical names above and only these exact aliases are accepted:

  • Linux x86-64: x86_64-linux-gnu, x86_64-unknown-linux-gnu
  • Linux ARM64: aarch64-linux-gnu, aarch64-unknown-linux-gnu
  • Linux RISC-V: riscv64, riscv64-linux-gnu, riscv64-unknown-linux-gnu
  • Windows x86-64: windows-gnu-x86_64, x86_64-pc-windows-msvc, x86_64-w64-windows-gnu
  • macOS x86-64: x86_64-apple-darwin
  • macOS ARM64: arm64-apple-darwin, aarch64-apple-darwin
  • iOS device: arm64-apple-ios, aarch64-apple-ios, arm64-apple-ios17.0, aarch64-apple-ios17.0
  • iOS simulator: arm64-apple-ios-simulator, aarch64-apple-ios-simulator, arm64-apple-ios17.0-simulator, aarch64-apple-ios17.0-simulator
  • Android ARM64: aarch64-linux-android, aarch64-linux-android24

Other values are rejected as CLI usage errors before toolchain discovery.

Linux RISC-V

linux-riscv64 is a first-class cross target for 64-bit Linux RISC-V userspace. The baseline is RV64GC with the LP64D ABI. Runtime SIMD reports scalar fallback features on RISC-V until RVV lowering is implemented.

On Arch-compatible hosts, the toolchain used by the QEMU smoke scripts is:

sudo pacman -Syu --needed clang llvm lld file qemu-user qemu-user-static qemu-system-riscv qemu-system-riscv-firmware riscv64-linux-gnu-binutils riscv64-linux-gnu-gcc riscv64-linux-gnu-glibc

Fast user-mode verification:

bash scripts/test_riscv64_qemu.sh --compiler compiler_seen/target/seen --require

Optional full-system verification requires a RISC-V kernel/rootfs and runs:

SEEN_RISCV64_QEMU_KERNEL=/path/to/Image \
SEEN_RISCV64_QEMU_ROOTFS=/path/to/rootfs.qcow2 \
SEEN_RISCV64_QEMU_IDENTITY=/path/to/key \
bash scripts/test_riscv64_system_qemu.sh --compiler compiler_seen/target/seen --require

Cross-Build Artifacts

Packaging and cross-build helpers can request per-module LLVM IR without scraping global temporary directories:

seen compile app.seen app-rv64 --target=linux-riscv64 \
  --emit-module-ir-dir target/riscv64-ir --stop-after-ir

The build and packaging scripts cache IR, transformed objects, runtime objects, and package payload manifests under ignored target/ directories when the full target, toolchain, compiler, runtime, profile, and LTO signatures match.