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std.zig.system: add OS checks for QEMU in getExternalExecutor()

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FreeBSD doesn't support the same number of platforms as Linux, and even then,
only has usermode emulation for a subset of its supported platforms.

NetBSD's usermode emulation support is apparently just broken at the moment.
This commit is contained in:
Alex Rønne Petersen 2025-10-05 17:47:27 +02:00
parent 5969d6180f
commit 9e61a64033
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1 changed files with 56 additions and 42 deletions
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98
lib/std/zig/system.zig
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@ -81,53 +81,67 @@ pub fn getExternalExecutor(
// If the OS matches, we can use QEMU to emulate a foreign architecture.
if (options.allow_qemu and os_match and (!cpu_ok or options.qemu_fixes_dl)) {
return switch (candidate.cpu.arch) {
.aarch64 => Executor{ .qemu = "qemu-aarch64" },
.aarch64_be => Executor{ .qemu = "qemu-aarch64_be" },
.arm, .thumb => Executor{ .qemu = "qemu-arm" },
.armeb, .thumbeb => Executor{ .qemu = "qemu-armeb" },
.hexagon => Executor{ .qemu = "qemu-hexagon" },
.loongarch64 => Executor{ .qemu = "qemu-loongarch64" },
.m68k => Executor{ .qemu = "qemu-m68k" },
.mips => Executor{ .qemu = "qemu-mips" },
.mipsel => Executor{ .qemu = "qemu-mipsel" },
.mips64 => Executor{
.qemu = switch (candidate.abi) {
.gnuabin32, .muslabin32 => "qemu-mipsn32",
else => "qemu-mips64",
},
inline .aarch64,
.arm,
.riscv64,
.x86,
.x86_64,
=> |t| switch (candidate.os.tag) {
.linux,
.freebsd,
=> .{ .qemu = switch (t) {
.x86 => "qemu-i386",
.x86_64 => switch (candidate.abi) {
.gnux32, .muslx32 => return bad_result,
else => "qemu-x86_64",
},
else => "qemu-" ++ @tagName(t),
} },
else => bad_result,
},
.mips64el => Executor{
.qemu = switch (candidate.abi) {
.gnuabin32, .muslabin32 => "qemu-mipsn32el",
else => "qemu-mips64el",
},
inline .aarch64_be,
.armeb,
.hexagon,
.loongarch64,
.m68k,
.mips,
.mipsel,
.mips64,
.mips64el,
.or1k,
.powerpc,
.powerpc64,
.powerpc64le,
.riscv32,
.s390x,
.sparc,
.sparc64,
.thumb,
.thumbeb,
.xtensa,
=> |t| switch (candidate.os.tag) {
.linux,
=> .{ .qemu = switch (t) {
.powerpc => "qemu-ppc",
.powerpc64 => "qemu-ppc64",
.powerpc64le => "qemu-ppc64le",
.mips64, .mips64el => switch (candidate.abi) {
.gnuabin32, .muslabin32 => if (t == .mips64el) "qemu-mipsn32el" else "qemu-mipsn32",
else => "qemu-" ++ @tagName(t),
},
.sparc => if (candidate.cpu.has(.sparc, .v8plus)) "qemu-sparc32plus" else "qemu-sparc",
.thumb => "qemu-arm",
.thumbeb => "qemu-armeb",
else => "qemu-" ++ @tagName(t),
} },
else => bad_result,
},
.or1k => Executor{ .qemu = "qemu-or1k" },
.powerpc => Executor{ .qemu = "qemu-ppc" },
.powerpc64 => Executor{ .qemu = "qemu-ppc64" },
.powerpc64le => Executor{ .qemu = "qemu-ppc64le" },
.riscv32 => Executor{ .qemu = "qemu-riscv32" },
.riscv64 => Executor{ .qemu = "qemu-riscv64" },
.s390x => Executor{ .qemu = "qemu-s390x" },
.sparc => Executor{
.qemu = if (candidate.cpu.has(.sparc, .v8plus))
"qemu-sparc32plus"
else
"qemu-sparc",
},
.sparc64 => Executor{ .qemu = "qemu-sparc64" },
.x86 => Executor{ .qemu = "qemu-i386" },
.x86_64 => switch (candidate.abi) {
.gnux32, .muslx32 => return bad_result,
else => Executor{ .qemu = "qemu-x86_64" },
},
.xtensa => Executor{ .qemu = "qemu-xtensa" },
else => bad_result,
};
}
if (options.allow_wasmtime and candidate.cpu.arch.isWasm()) {
return Executor{ .wasmtime = "wasmtime" };
return .{ .wasmtime = "wasmtime" };
}
switch (candidate.os.tag) {
@ -143,7 +157,7 @@ pub fn getExternalExecutor(
.x86_64 => host.cpu.arch == .x86_64,
else => false,
};
return if (wine_supported) Executor{ .wine = "wine" } else bad_result;
return if (wine_supported) .{ .wine = "wine" } else bad_result;
}
return bad_result;
},
@ -155,7 +169,7 @@ pub fn getExternalExecutor(
if (candidate.cpu.arch != host.cpu.arch) {
return bad_result;
}
return Executor{ .darling = "darling" };
return .{ .darling = "darling" };
}
return bad_result;
},