From 5423778f6f9d1ec424bf74d40c16c433f20681b2 Mon Sep 17 00:00:00 2001
From: Jakub Konka <kubkon@jakubkonka.com>
Date: Sun, 15 Oct 2023 15:38:32 +0200
Subject: [PATCH] elf: add self-hosted tests

---
 test/link/elf.zig | 68 ++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 67 insertions(+), 1 deletion(-)

diff --git a/test/link/elf.zig b/test/link/elf.zig
index 3ff1028393..c673f0cd46 100644
--- a/test/link/elf.zig
+++ b/test/link/elf.zig
@@ -18,7 +18,9 @@ pub fn build(b: *Build) void {
     };
 
     // Exercise linker with self-hosted backend (no LLVM)
-    // elf_step.dependOn(testLinkingZig(b, .{ .use_llvm = false }));
+    elf_step.dependOn(testLinkingZig(b, .{ .use_llvm = false }));
+    elf_step.dependOn(testImportingDataDynamic(b, .{ .use_llvm = false, .target = glibc_target }));
+    elf_step.dependOn(testImportingDataStatic(b, .{ .use_llvm = false, .target = musl_target }));
 
     // Exercise linker with LLVM backend
     // musl tests
@@ -1223,6 +1225,70 @@ fn testImageBase(b: *Build, opts: Options) *Step {
     return test_step;
 }
 
+fn testImportingDataDynamic(b: *Build, opts: Options) *Step {
+    const test_step = addTestStep(b, "importing-data-dynamic", opts);
+
+    const dso = addSharedLibrary(b, "a", .{
+        .target = opts.target,
+        .optimize = opts.optimize,
+        .use_llvm = true,
+    });
+    addCSourceBytes(dso, "int foo = 42;", &.{});
+
+    const main = addExecutable(b, "main", opts);
+    addZigSourceBytes(main,
+        \\extern var foo: i32;
+        \\pub fn main() void {
+        \\    @import("std").debug.print("{d}\n", .{foo});
+        \\}
+    );
+    main.pie = true;
+    main.strip = true; // TODO temp hack
+    main.linkLibrary(dso);
+    main.linkLibC();
+
+    const run = addRunArtifact(main);
+    run.expectStdErrEqual("42\n");
+    test_step.dependOn(&run.step);
+
+    return test_step;
+}
+
+fn testImportingDataStatic(b: *Build, opts: Options) *Step {
+    const test_step = addTestStep(b, "importing-data-static", opts);
+
+    const obj = addObject(b, "a", .{
+        .target = opts.target,
+        .optimize = opts.optimize,
+        .use_llvm = true,
+    });
+    addCSourceBytes(obj, "int foo = 42;", &.{});
+
+    const lib = addStaticLibrary(b, "a", .{
+        .target = opts.target,
+        .optimize = opts.optimize,
+        .use_llvm = true,
+    });
+    lib.addObject(obj);
+
+    const main = addExecutable(b, "main", opts);
+    addZigSourceBytes(main,
+        \\extern var foo: i32;
+        \\pub fn main() void {
+        \\    @import("std").debug.print("{d}\n", .{foo});
+        \\}
+    );
+    main.strip = true; // TODO temp hack
+    main.linkLibrary(lib);
+    main.linkLibC();
+
+    const run = addRunArtifact(main);
+    run.expectStdErrEqual("42\n");
+    test_step.dependOn(&run.step);
+
+    return test_step;
+}
+
 fn testInitArrayOrder(b: *Build, opts: Options) *Step {
     const test_step = addTestStep(b, "init-array-order", opts);