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const std = @import("std");
const builtin = @import("builtin");
const Build = std.Build;
const LazyPath = Build.LazyPath;
const Step = Build.Step;
const Run = Step.Run;
const WriteFile = Step.WriteFile;
pub fn build(b: *Build) void {
const nb_files = b.option(u32, "nb_files", "Number of c files to generate.") orelse 10;
const test_step = b.step("test", "Test it");
b.default_step = test_step;
// generate c files
const files = b.allocator.alloc(LazyPath, nb_files) catch unreachable;
defer b.allocator.free(files);
{
for (files[0 .. nb_files - 1], 1..nb_files) |*file, i| {
const wf = WriteFile.create(b);
file.* = wf.add(b.fmt("src_{}.c", .{i}), b.fmt(
\\extern int foo_0();
\\extern int bar_{}();
\\extern int one_{};
\\int one_{} = 1;
\\int foo_{}() {{ return one_{} + foo_0(); }}
\\int bar_{}() {{ return bar_{}(); }}
, .{ i - 1, i - 1, i, i, i - 1, i, i - 1 }));
}
{
const wf = WriteFile.create(b);
files[nb_files - 1] = wf.add("src_last.c", b.fmt(
\\extern int foo_0();
\\extern int bar_{}();
\\extern int one_{};
\\int foo_last() {{ return one_{} + foo_0(); }}
\\int bar_last() {{ return bar_{}(); }}
, .{ nb_files - 1, nb_files - 1, nb_files - 1, nb_files - 1 }));
}
}
add(b, test_step, files, .Debug);
add(b, test_step, files, .ReleaseSafe);
add(b, test_step, files, .ReleaseSmall);
add(b, test_step, files, .ReleaseFast);
}
fn add(b: *Build, test_step: *Step, files: []const LazyPath, optimize: std.builtin.OptimizeMode) void {
const flags = [_][]const u8{
"-Wall",
"-std=c11",
};
// all files at once
{
const exe = b.addExecutable(.{
.name = "test1",
.root_module = b.createModule(.{
.root_source_file = b.path("main.zig"),
.optimize = optimize,
.target = b.graph.host,
}),
});
for (files) |file| {
exe.root_module.addCSourceFile(.{ .file = file, .flags = &flags });
}
const run_cmd = b.addRunArtifact(exe);
run_cmd.skip_foreign_checks = true;
run_cmd.expectExitCode(0);
test_step.dependOn(&run_cmd.step);
}
// using static librairies
{
const mod_a = b.createModule(.{ .target = b.graph.host, .optimize = optimize });
const mod_b = b.createModule(.{ .target = b.graph.host, .optimize = optimize });
for (files, 1..) |file, i| {
const mod = if (i & 1 == 0) mod_a else mod_b;
mod.addCSourceFile(.{ .file = file, .flags = &flags });
}
const lib_a = b.addLibrary(.{
.linkage = .static,
.name = "test2_a",
.root_module = mod_a,
});
const lib_b = b.addLibrary(.{
.linkage = .static,
.name = "test2_b",
.root_module = mod_b,
});
const exe = b.addExecutable(.{
.name = "test2",
.root_module = b.createModule(.{
.root_source_file = b.path("main.zig"),
.target = b.graph.host,
.optimize = optimize,
}),
});
exe.root_module.linkLibrary(lib_a);
exe.root_module.linkLibrary(lib_b);
const run_cmd = b.addRunArtifact(exe);
run_cmd.skip_foreign_checks = true;
run_cmd.expectExitCode(0);
test_step.dependOn(&run_cmd.step);
}
// using static librairies and object files
{
const mod_a = b.createModule(.{ .target = b.graph.host, .optimize = optimize });
const mod_b = b.createModule(.{ .target = b.graph.host, .optimize = optimize });
for (files, 1..) |file, i| {
const obj_mod = b.createModule(.{ .target = b.graph.host, .optimize = optimize });
obj_mod.addCSourceFile(.{ .file = file, .flags = &flags });
const obj = b.addObject(.{
.name = b.fmt("obj_{}", .{i}),
.root_module = obj_mod,
});
const lib_mod = if (i & 1 == 0) mod_a else mod_b;
lib_mod.addObject(obj);
}
const lib_a = b.addLibrary(.{
.linkage = .static,
.name = "test3_a",
.root_module = mod_a,
});
const lib_b = b.addLibrary(.{
.linkage = .static,
.name = "test3_b",
.root_module = mod_b,
});
const exe = b.addExecutable(.{
.name = "test3",
.root_module = b.createModule(.{
.root_source_file = b.path("main.zig"),
.target = b.graph.host,
.optimize = optimize,
}),
});
exe.root_module.linkLibrary(lib_a);
exe.root_module.linkLibrary(lib_b);
const run_cmd = b.addRunArtifact(exe);
run_cmd.skip_foreign_checks = true;
run_cmd.expectExitCode(0);
test_step.dependOn(&run_cmd.step);
}
}
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