Properly link flecs library

engine/libs/flecs/examples/cpp/entities/emplace/include/emplace.h

@@ -0,0 +1,16 @@
+#ifndef EMPLACE_H
+#define EMPLACE_H
+
+/* This generated file contains includes for project dependencies */
+#include "emplace/bake_config.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
+

engine/libs/flecs/examples/cpp/entities/emplace/include/emplace/bake_config.h

@@ -0,0 +1,24 @@
+/*
+                                   )
+                                  (.)
+                                  .|.
+                                  | |
+                              _.--| |--._
+                           .-';  ;`-'& ; `&.
+                          \   &  ;    &   &_/
+                           |"""---...---"""|
+                           \ | | | | | | | /
+                            `---.|.|.|.---'
+
+ * This file is generated by bake.lang.c for your convenience. Headers of
+ * dependencies will automatically show up in this file. Include bake_config.h
+ * in your main project file. Do not edit! */
+
+#ifndef EMPLACE_BAKE_CONFIG_H
+#define EMPLACE_BAKE_CONFIG_H
+
+/* Headers of public dependencies */
+#include <flecs.h>
+
+#endif
+

engine/libs/flecs/examples/cpp/entities/emplace/project.json

@@ -0,0 +1,11 @@
+{
+    "id": "emplace",
+    "type": "application",
+    "value": {
+        "use": [
+            "flecs"
+        ],
+        "public": false,
+        "language": "c++"
+    }
+}

engine/libs/flecs/examples/cpp/entities/emplace/src/main.cpp

@@ -0,0 +1,28 @@
+#include <emplace.h>
+#include <iostream>
+
+// The emplace method constructs a component directly in the storage vs. a 
+// regular set, which moves the value into an already constructed value in the
+// storage. This reduces the overhead of creating a new component.
+//
+// Components that do not have a default constructor need to be created with
+// emplace, as they can't be constructed automatically by flecs.
+
+struct NoDefaultCtor {
+    NoDefaultCtor(double x_, double y_) : x(x_), y(y_) { }
+
+    double x, y;
+};
+
+int main(int, char *[]) {
+    flecs::world ecs;
+
+    flecs::entity e = ecs.entity()
+        .emplace<NoDefaultCtor>(10.0, 20.0);
+
+    const NoDefaultCtor *ptr = e.get<NoDefaultCtor>();
+    std::cout << "{" << ptr->x << ", " << ptr->y << "}" << "\n";
+
+    // Output
+    //  {10, 20}
+}