example4 (mix C++/D) added

.github/workflows/ci.yml

@@ -25,4 +25,4 @@ jobs:
             zig build run-example1
             zig build run-example2
             zig build run-example3
-            zig build run-cpp
+            zig build run-example4

build.zig

@@ -73,16 +73,14 @@ pub fn build(b: *std.Build) !void {
         },
     });
 
-    // C++ build test
-
-    const exe = b.addExecutable(.{
-        .name = "cpp_tests",
+    const lib = b.addStaticLibrary(.{
+        .name = "example4",
         .target = target,
         .optimize = optimize,
     });
-    exe.addCSourceFiles(.{
+    lib.addCSourceFiles(.{
         .root = bdwgc_path,
-        .files = if (exe.rootModuleTarget().abi != .msvc)
+        .files = if (lib.rootModuleTarget().abi != .msvc)
             &.{
                 "gc_cpp.cc",
                 "gc_badalc.cc",
@@ -98,27 +96,35 @@ pub fn build(b: *std.Build) !void {
             "-Wextra",
         },
     });
-    exe.addCSourceFile(.{
-        .file = b.path("tests/cpp.cc"),
+    lib.addCSourceFile(.{
+        .file = b.path("examples/example4.cc"),
         .flags = &.{
             "-Wall",
             "-Wpedantic",
             "-Wextra",
         },
     });
     for (bdwgc_artifact.root_module.include_dirs.items) |dir| {
-        exe.addIncludePath(dir.path);
+        lib.addIncludePath(dir.path);
     }
-    exe.linkLibrary(bdwgc_artifact);
-    if (exe.rootModuleTarget().abi != .msvc) {
-        exe.linkLibCpp();
+    lib.linkLibrary(bdwgc_artifact);
+    if (lib.rootModuleTarget().abi != .msvc) {
+        lib.linkLibCpp();
     } else {
-        exe.linkLibC();
+        lib.linkLibC();
     }
-    b.installArtifact(exe);
-    const run_cmd = b.addRunArtifact(exe);
-    const run_step = b.step("run-cpp", "Run the C++ app");
-    run_step.dependOn(&run_cmd.step);
+    try buildExe(b, .{
+        .name = "example4",
+        .target = target,
+        .optimize = optimize,
+        .betterC = true, // need D runtimeGC
+        .artifact = lib,
+        .sources = &.{"examples/example4.d"},
+        .dflags = &.{
+            "-w",
+            "-Isrc",
+        },
+    });
 }
 fn buildExe(b: *std.Build, options: abs.DCompileStep) !void {
     const exe = try abs.ldcBuildStep(b, options);

build.zig.zon

@@ -4,7 +4,7 @@
     .dependencies = .{
         .abs = .{
             .url = "git+https://github.com/kassane/anotherBuildStep#main",
-            .hash = "12201a8ca860ea3f27538562f1862891242699679edde2a6159b73177b3c495ff6de",
+            .hash = "12200d68b7fe7b0c3b63c703ee20eb919fe15760b62e794946e99fd11c4f2e738378",
         },
         .bdwgc = .{
             .url = "git+https://github.com/ivmai/bdwgc#df1a787929aa550ec5343442fd2212a2717ac0cd",

examples/example4.cc

@@ -0,0 +1,17 @@
+#include <gc_cpp.h>
+
+struct Person {
+  char* name;
+  int age;
+  Person* people;
+};
+
+Person createPerson(const char* name, int age) {
+  Person p;
+  p.name = GC_strdup(name);
+  p.age = age;
+  p.people = static_cast<Person*>(GC_malloc(sizeof(Person)));
+  // FIXME: undefined reference to `__gxx_personality_v0'
+  // p.people = gc_allocator<Person>().allocate(1);
+  return p;
+}

examples/example4.d

@@ -0,0 +1,27 @@
+import bdwgc;
+
+extern (C++)
+{
+    struct Person
+    {
+        char* name;
+        int age;
+        Person* people;
+    }
+
+    Person createPerson(const(char)* name, int age);
+}
+extern (C):
+void main()
+{
+    GC_init();
+    GC_set_all_interior_pointers(1);
+
+    Person p1 = createPerson("John", 42);
+    Person p2 = createPerson("Sarah", 35);
+    GC_gcollect();
+    GC_printf("%s, have %d years old.\n", p1.name, p1.age);
+    GC_printf("%s, have %d years old.\n", p2.name, p2.age);
+}
+pragma(printf)
+void GC_printf(const(char)* format, ...);