Properly link flecs library

engine/libs/flecs/examples/cpp/systems/custom_phases/include/custom_phases.h

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

engine/libs/flecs/examples/cpp/systems/custom_phases/include/custom_phases/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 CUSTOM_PHASES_BAKE_CONFIG_H
+#define CUSTOM_PHASES_BAKE_CONFIG_H
+
+/* Headers of public dependencies */
+#include <flecs.h>
+
+#endif
+

engine/libs/flecs/examples/cpp/systems/custom_phases/project.json

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

engine/libs/flecs/examples/cpp/systems/custom_phases/src/main.cpp

@@ -0,0 +1,47 @@
+#include <custom_phases.h>
+#include <iostream>
+
+// This application demonstrates how to use custom phases for systems. The 
+// default pipeline will automatically run systems for custom phases as long as 
+// they have the flecs::Phase tag.
+
+// Dummy system
+void Sys(flecs::iter& it) {
+    std::cout << "system " << it.system().name() << "\n";
+}
+
+int main(int argc, char *argv[]) {
+    flecs::world ecs(argc, argv);
+
+    // Create two custom phases that branch off of EcsOnUpdate. Note that the
+    // phases have the Phase tag, which is necessary for the builtin pipeline 
+    // to discover which systems it should run.
+    flecs::entity Physics = ecs.entity()
+        .add(flecs::Phase)
+        .depends_on(flecs::OnUpdate);
+
+    flecs::entity Collisions = ecs.entity()
+        .add(flecs::Phase)
+        .depends_on(Physics);
+
+    // Create 3 dummy systems.
+    ecs.system("CollisionSystem")
+        .kind(Collisions)
+        .iter(Sys);
+
+    ecs.system("PhysicsSystem")
+        .kind(Physics)
+        .iter(Sys);
+
+    ecs.system("GameSystem")
+        .kind(flecs::OnUpdate)
+        .iter(Sys);
+
+    // Run pipeline
+    ecs.progress();
+
+    // Output
+    //   system GameSystem
+    //   system PhysicsSystem
+    //   system CollisionSystem
+}