Properly link flecs library

engine/libs/flecs/test/custom_builds/cpp/timer/include/timer.h

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

engine/libs/flecs/test/custom_builds/cpp/timer/include/timer/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 TIMER_BAKE_CONFIG_H
+#define TIMER_BAKE_CONFIG_H
+
+/* Headers of public dependencies */
+#include "../../deps/flecs.h"
+
+#endif
+

engine/libs/flecs/test/custom_builds/cpp/timer/project.json

@@ -0,0 +1,15 @@
+{
+    "id": "timer",
+    "type": "application",
+    "value": {
+        "use": [
+            "flecs"
+        ],
+        "public": false,
+        "standalone": true,
+        "language": "c++"
+    },
+    "lang.cpp": {
+        "defines": ["FLECS_CUSTOM_BUILD", "FLECS_CPP", "FLECS_TIMER"]
+    }
+}

engine/libs/flecs/test/custom_builds/cpp/timer/src/main.cpp

@@ -0,0 +1,41 @@
+#include <timer.h>
+#include <iostream>
+
+struct Position { 
+    int32_t x, y;
+};
+
+struct Velocity { 
+    int32_t x, y;
+};
+
+int main(int, char *[]) {
+    flecs::world ecs;
+
+    flecs::entity s = ecs.system<Position, const Velocity>()
+        .interval(2.9f)
+        .each([](Position& p, const Velocity& v) {
+            p.x += v.x;
+            p.y += v.y;
+        });
+
+    flecs::Timer *t = s.get_mut<flecs::Timer>();
+    t->time = 0;
+
+    auto e = ecs.entity()
+        .set<Position>({10, 20})
+        .set<Velocity>({1, 2});
+
+    const Position *p = e.get<Position>();
+
+    ecs.progress(1.0);
+    ecs.progress(1.0);
+
+    assert(p->x == 10);
+    assert(p->y == 20);
+
+    ecs.progress(1.0);
+
+    assert(p->x == 11);
+    assert(p->y == 22);
+}