| author |  Alex Rønne Petersen <alex@alexrp.com> 2024-12-16 06:07:02+01:00 |
| committer | Alex Rønne Petersen <alex@alexrp.com> 2025-01-25 14:57:33+01:00 |
| log | afe2fed34dd960afb44f88cfe6ce088e1817cb5b |
| tree | a83b5824089c293bf133e5ccab81e342a5972471 |
| parent | cd8c92fc40993d307e891be27bfd86574c2ce85d |
| signature |  Signed by SSH key SHA256:7B/LJ7bpR1eX8aCXSr4mtd5M45VMPKcx9zY8e95b5QM |
link: Set machine and float ABI when invoking ld.lld and lld-link.
If this isn't done, LTO can completely miscompile the input bitcode modules for
certain targets where we need to explicitly set these ABIs (because LLVM's
defaults are bad).2 files changed, 19 insertions(+), 0 deletions(-)
src/link/Coff.zig+7
| ... | ... | @@ -1876,6 +1876,13 @@ fn linkWithLLD(coff: *Coff, arena: Allocator, tid: Zcu.PerThread.Id, prog_node: |
| 1876 | 1876 | if (comp.version) |version| { |
| 1877 | 1877 | try argv.append(try allocPrint(arena, "-VERSION:{}.{}", .{ version.major, version.minor })); |
| 1878 | 1878 | } |
| 1879 | ||
| 1880 | if (target_util.llvmMachineAbi(target)) |mabi| { | |
| 1881 | try argv.append(try allocPrint(arena, "-MLLVM:-target-abi={s}", .{mabi})); | |
| 1882 | } | |
| 1883 | ||
| 1884 | try argv.append(try allocPrint(arena, "-MLLVM:-float-abi={s}", .{if (target.abi.floatAbi() == .hard) "hard" else "soft"})); | |
| 1885 | ||
| 1879 | 1886 | if (comp.config.lto != .none) { |
| 1880 | 1887 | switch (optimize_mode) { |
| 1881 | 1888 | .Debug => {}, |
src/link/Elf.zig+12
| ... | ... | @@ -1700,6 +1700,18 @@ fn linkWithLLD(self: *Elf, arena: Allocator, tid: Zcu.PerThread.Id, prog_node: s |
| 1700 | 1700 | try argv.append(try std.fmt.allocPrint(arena, "--sysroot={s}", .{sysroot})); |
| 1701 | 1701 | } |
| 1702 | 1702 | |
| 1703 | if (target_util.llvmMachineAbi(target)) |mabi| { | |
| 1704 | try argv.appendSlice(&.{ | |
| 1705 | "-mllvm", | |
| 1706 | try std.fmt.allocPrint(arena, "-target-abi={s}", .{mabi}), | |
| 1707 | }); | |
| 1708 | } | |
| 1709 | ||
| 1710 | try argv.appendSlice(&.{ | |
| 1711 | "-mllvm", | |
| 1712 | try std.fmt.allocPrint(arena, "-float-abi={s}", .{if (target.abi.floatAbi() == .hard) "hard" else "soft"}), | |
| 1713 | }); | |
| 1714 | ||
| 1703 | 1715 | if (comp.config.lto != .none) { |
| 1704 | 1716 | switch (comp.root_mod.optimize_mode) { |
| 1705 | 1717 | .Debug => {}, |