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build.zig: predefine some CPU features

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Eventually, we should compile files depending on specific CPU
extensions separately, like what regular Makefiles are doing.
This commit is contained in:
Frank Denis 2023-09-11 00:07:38 +02:00
parent 79e44b494e
commit d84fbc2304
1 changed files with 20 additions and 1 deletions
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21
build.zig
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@ -14,7 +14,7 @@ pub fn build(b: *std.build.Builder) !void {
const src_path = "src/libsodium";
const src_dir = try fs.Dir.openIterableDir(cwd, src_path, .{ .no_follow = true });
const target = b.standardTargetOptions(.{});
var target = b.standardTargetOptions(.{});
const optimize = b.standardOptimizeOption(.{});
const enable_benchmarks = b.option(bool, "enable_benchmarks", "Whether tests should be benchmarks.") orelse false;
@ -27,6 +27,25 @@ pub fn build(b: *std.build.Builder) !void {
if (build_tests) {
build_static = true;
}
switch (target.getCpuArch()) {
// Features we assume are always available because they won't affect
// code generation in files that don't use them.
.x86_64 => {
target.cpu_features_add.addFeature(@intFromEnum(Target.x86.Feature.aes));
target.cpu_features_add.addFeature(@intFromEnum(Target.x86.Feature.pclmul));
target.cpu_features_add.addFeature(@intFromEnum(Target.x86.Feature.rdrnd));
},
.aarch64, .aarch64_be => {
target.cpu_features_add.addFeature(@intFromEnum(Target.aarch64.Feature.crypto));
// ARM CPUs supported by Windows also support NEON.
if (target.isWindows()) {
target.cpu_features_add.addFeature(@intFromEnum(Target.aarch64.Feature.neon));
}
},
else => {},
}
const static_lib = b.addStaticLibrary(.{
.name = "sodium",
.target = target,