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support all OSs for the build (although many will not be practical)

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This commit is contained in:
Emil Lerch 2024-07-17 19:04:19 -07:00
parent 4318c14fe3
commit bfea6e15ef
Signed by: lobo
GPG key ID: A7B62D657EF764F8
1 changed files with 25 additions and 27 deletions
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52
build.zig
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@ -112,36 +112,34 @@ fn configure(compile: *std.Build.Step.Compile, paths: std.zig.system.NativePaths
} }
fn checkNix(b: *std.Build, target_query: *std.Target.Query) !std.zig.system.NativePaths { fn checkNix(b: *std.Build, target_query: *std.Target.Query) !std.zig.system.NativePaths {
// All linux-specific stuff should be in here
if (@import("builtin").os.tag != .linux or !(target_query.os_tag == null or target_query.os_tag.? == .linux)) {
std.log.err("Only linux host and target builds supported right now", .{});
return error.NotImplemented;
}
// Capture the natively detected paths for potential future use
const native_result = b.resolveTargetQuery(target_query.*); const native_result = b.resolveTargetQuery(target_query.*);
const paths = try std.zig.system.NativePaths.detect(b.allocator, native_result.result); const paths = try std.zig.system.NativePaths.detect(b.allocator, native_result.result);
const nix_develop_bintools = std.posix.getenv("NIX_BINTOOLS");
if (nix_develop_bintools) |bintools| {
// std.debug.print("\nDetected nix bintools\n", .{});
// We'll capture the interpreter used in $NIX_BINTOOLS/bin/size
// We expect this to be a symlink to a native elf executable
// readlink $NIX_BINTOOLS/bin/size
var pathbuf: [std.posix.PATH_MAX]u8 = undefined;
const elf_path = try std.posix.readlink(
try std.fs.path.join(b.allocator, &[_][]const u8{
bintools,
"bin",
"size",
}),
&pathbuf,
);
// Setting the dynamic linker (necessary to avoid dll hell) will put // If we are not using nix, we can build anywhere provided the system dependencies exist
// zig into a non-native mode, and will therefore ignore all the native if (!std.process.hasEnvVarConstant("NIX_BINTOOLS")) return paths;
// paths. We'll put these back from the values captured above in
// our configure function // Capture the natively detected paths for potential future use
target_query.dynamic_linker = try getDynamicLinker(elf_path); const bintools = try std.process.getEnvVarOwned(b.allocator, "NIX_BINTOOLS");
}
// We'll capture the interpreter used in $NIX_BINTOOLS/bin/size
// We expect this to be a symlink to a native elf executable
// readlink $NIX_BINTOOLS/bin/size
var pathbuf: [std.posix.PATH_MAX]u8 = undefined;
// posix.readlink is supported on all OSs
const elf_path = try std.posix.readlink(
try std.fs.path.join(b.allocator, &[_][]const u8{
bintools,
"bin",
"size",
}),
&pathbuf,
);
// Setting the dynamic linker (necessary to avoid dll hell) will put
// zig into a non-native mode, and will therefore ignore all the native
// paths. We'll put these back from the values captured above in
// our configure function
target_query.dynamic_linker = try getDynamicLinker(elf_path);
return paths; return paths;
} }
fn getDynamicLinker(elf_path: []const u8) !std.Target.DynamicLinker { fn getDynamicLinker(elf_path: []const u8) !std.Target.DynamicLinker {