70 lines
3.4 KiB
Zig
70 lines
3.4 KiB
Zig
const std = @import("std");
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// Returns true if the version includes https://github.com/ziglang/zig/pull/10572/commits.
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// When this is false, trying to place the stack first will result in data corruption.
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fn version_supports_stack_first(zig_version: std.SemanticVersion) !bool {
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if (zig_version.order(try std.SemanticVersion.parse("0.10.0")).compare(.gte)) {
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// Merged here: https://github.com/ziglang/zig/pull/10572
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return true;
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}
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if (zig_version.major == 0 and zig_version.minor == 10) {
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// Check for 0.10.0-dev.258+. Conservatively check the prefix of the tag
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// in case zig uses other prefixes that don't respect semver ordering.
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if (zig_version.pre) |pre| {
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// Merged here: https://github.com/ziglang/zig/pull/10572
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return std.mem.startsWith(u8, pre, "dev.") and zig_version.order(try std.SemanticVersion.parse("0.10.0-dev.258")).compare(.gte);
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}
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}
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// Backported here: https://github.com/ziglang/zig/commit/6f49233ac6a6569b909b689f22fc260dc8c19234
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return zig_version.order(try std.SemanticVersion.parse("0.9.1")).compare(.gte);
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}
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test "stack version check" {
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const expect = std.testing.expect;
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const parse = std.SemanticVersion.parse;
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try expect(!try version_supports_stack_first(try parse("0.8.0")));
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try expect(!try version_supports_stack_first(try parse("0.9.0")));
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try expect(!try version_supports_stack_first(try parse("0.9.1-dev.259")));
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try expect(try version_supports_stack_first(try parse("0.9.1")));
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// Conservatively don't recognize tags other than 'dev'.
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try expect(!try version_supports_stack_first(try parse("0.10.0-aev.259")));
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try expect(!try version_supports_stack_first(try parse("0.10.0-zev.259")));
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try expect(!try version_supports_stack_first(try parse("0.10.0-dev.257")));
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try expect(try version_supports_stack_first(try parse("0.10.0-dev.258")));
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try expect(try version_supports_stack_first(try parse("0.10.0-dev.259")));
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try expect(try version_supports_stack_first(try parse("0.10.0")));
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try expect(try version_supports_stack_first(try parse("0.10.1-dev.100")));
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try expect(try version_supports_stack_first(try parse("0.10.1-dev.300")));
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try expect(try version_supports_stack_first(try parse("0.10.1")));
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try expect(try version_supports_stack_first(try parse("1.0.0")));
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}
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pub fn build(b: *std.build.Builder) !void {
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const zig_version = @import("builtin").zig_version;
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const mode = b.standardReleaseOptions();
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const lib = b.addSharedLibrary("cart", "src/main.zig", .unversioned);
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lib.setBuildMode(mode);
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lib.setTarget(.{ .cpu_arch = .wasm32, .os_tag = .freestanding });
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lib.import_memory = true;
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lib.initial_memory = 65536;
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lib.max_memory = 65536;
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if (try version_supports_stack_first(zig_version)) {
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lib.stack_size = 14752;
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} else {
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// `--stack-first` option have been reenabled on wasm targets with https://github.com/ziglang/zig/pull/10572
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std.log.warn("Update to Zig >=0.9.1 (or >=0.10.0-dev.258 for nightly) to detect stack overflows at runtime.", .{});
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lib.global_base = 6560;
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lib.stack_size = 8192;
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}
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// Workaround https://github.com/ziglang/zig/issues/2910, preventing
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// functions from compiler_rt getting incorrectly marked as exported, which
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// prevents them from being removed even if unused.
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lib.export_symbol_names = &[_][]const u8{ "start", "update" };
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lib.install();
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}
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