diff --git a/src/base/base_wave.h b/src/base/base_wave.h
index 5957fadb..ca516d2b 100644
--- a/src/base/base_wave.h
+++ b/src/base/base_wave.h
@@ -6,6 +6,7 @@
 AlignedStruct(WaveCtx, CachelineSize)
 {
     i32 lanes_count;
+    void *udata;
 
     /* Sync barrier */
     Atomic32Padded sync_count;
@@ -26,7 +27,7 @@ AlignedStruct(WaveLaneCtx, CachelineSize)
     i64 seen_broadcast_gen;
 };
 
-typedef void WaveLaneEntryFunc(WaveLaneCtx *lane, void *udata);
+typedef void WaveLaneEntryFunc(WaveLaneCtx *lane);
 
 ////////////////////////////////////////////////////////////
 //~ Wave sync ops
diff --git a/src/base/base_win32/base_win32_wave.c b/src/base/base_win32/base_win32_wave.c
index ff168415..7db076bd 100644
--- a/src/base/base_win32/base_win32_wave.c
+++ b/src/base/base_win32/base_win32_wave.c
@@ -27,7 +27,7 @@ DWORD WINAPI W32_ThreadProc(LPVOID thread_args_vp)
     W32_ThreadArgs *thread_args = (W32_ThreadArgs *)thread_args_vp;
     W32_InitCurrentThread(thread_args->name);
     LogInfoF("New thread \"%F\" created with ID %F", FmtString(thread_args->name), FmtUint(ThreadId()));
-    thread_args->entry(thread_args->lane, thread_args->udata);
+    thread_args->entry(thread_args->lane);
     return 0;
 }
 
@@ -40,6 +40,7 @@ void DispatchWave(String name, u32 num_lanes, WaveLaneEntryFunc *entry, void *ud
 
     WaveCtx *wave_ctx = PushStruct(perm, WaveCtx);
     wave_ctx->lanes_count = num_lanes;
+    wave_ctx->udata = udata;
 
     for (u32 lane_idx = 0; lane_idx < num_lanes; ++lane_idx)
     {
diff --git a/src/meta/meta.c b/src/meta/meta.c
index a648be67..186a2bc0 100644
--- a/src/meta/meta.c
+++ b/src/meta/meta.c
@@ -1,65 +1,7 @@
-/* TODO: Move decls to meta.h */
-
-#define MetaRebuildCode 1317212284
-
-////////////////////////////////////////////////////////////
-//~ Default base layer compiler definitions
-
-#ifndef IsConsoleApp
-# define IsConsoleApp 1
-#endif
-
-#ifndef IsRtcEnabled
-# define IsRtcEnabled 1
-#endif
-
-#ifndef IsUnoptimized
-# define IsUnoptimized 1
-#endif
-
-#ifndef IsAsanEnabled
-# define IsAsanEnabled 0
-#endif
-
-#ifndef IsCrtlibEnabled
-# define IsCrtlibEnabled 1
-#endif
-
-#ifndef IsDebinfoEnabled
-# define IsDebinfoEnabled 1
-#endif
-
-#ifndef IsDeveloperModeEnabled
-# define IsDeveloperModeEnabled 1
-#endif
-
-#ifndef IsUnoptimized
-# define IsUnoptimized 1
-#endif
-
-#ifndef IsTestingEnabled
-# define IsTestingEnabled 0
-#endif
-
-#ifndef IsHotSwappingEnabled
-# define IsHotSwappingEnabled 0
-#endif
-
-////////////////////////////////////////////////////////////
-//~ Includes
-
-//- Header files
-#include "../base/base_inc.h"
-#include "meta_os/meta_os_inc.h"
-#include "meta_file/meta_file_inc.h"
-#include "meta_lay.h"
 #include "meta.h"
 
-//- Source files
-#include "meta_lay.c"
-
 ////////////////////////////////////////////////////////////
-//~ Util
+//~ Helpers
 
 void EchoLine(String msg)
 {
@@ -80,12 +22,6 @@ void EchoLineOrNothing(String msg)
     }
 }
 
-Struct(LineCol)
-{
-    i64 line;
-    i64 col;
-};
-
 LineCol LineColFromPos(String data, i64 pos)
 {
     TempArena scratch = BeginScratchNoConflict();
@@ -147,9 +83,9 @@ String StringFromMetaErrors(Arena *arena, M_ErrorList errors)
 }
 
 ////////////////////////////////////////////////////////////
-//~ Startup
+//~ Build
 
-void BuildEntryPoint(WaveLaneCtx *lane, void *udata)
+void BuildEntryPoint(WaveLaneCtx *lane)
 {
     Arena *perm = PermArena();
 
@@ -230,26 +166,7 @@ void BuildEntryPoint(WaveLaneCtx *lane, void *udata)
     //////////////////////////////
     //- Generate compiler params
 
-    Struct(CompilerParams)
-    {
-        StringList defs;
-
-        StringList warnings_msvc;
-        StringList warnings_clang;
-        StringList warnings_dxc;
-
-        StringList flags_msvc;
-        StringList flags_clang;
-        StringList flags_dxc;
-
-        StringList compiler_only_flags_msvc;
-        StringList compiler_only_flags_clang;
-
-        StringList linker_only_flags_msvc;
-        StringList linker_only_flags_clang;
-    };
     CompilerParams cp = ZI;
-
     {
         //- Common
         {
@@ -345,41 +262,6 @@ void BuildEntryPoint(WaveLaneCtx *lane, void *udata)
     String c_out_file = F_GetFull(perm, StringF(perm, "%F_gen_c.c", FmtString(cmdline.leaf_layer_name)));
     String gpu_out_file = F_GetFull(perm, StringF(perm, "%F_gen_gpu.hlsl", FmtString(cmdline.leaf_layer_name)));
 
-    Enum(ShaderEntryKind)
-    {
-        ShaderEntryKind_VS,
-        ShaderEntryKind_PS,
-        ShaderEntryKind_CS,
-    };
-
-    Struct(ShaderEntry)
-    {
-        ShaderEntry *next;
-        ShaderEntryKind kind;
-        String name;
-    };
-
-    Struct(ArcInfoEntry)
-    {
-        ArcInfoEntry *next;
-        String dir_path;
-        String store_name;
-        String out_path;
-    };
-
-    Struct(GpuComp)
-    {
-        String output;
-        i32 return_code;
-    };
-
-    Struct(ResComp)
-    {
-        String obj_file;
-        String output;
-        i32 return_code;
-    };
-
     /*
      * ## Phase 1
      *
@@ -409,57 +291,6 @@ void BuildEntryPoint(WaveLaneCtx *lane, void *udata)
 
     /* TODO: Dispatch OS Cmds asynchronously rather than synchronously waiting on each lane */
 
-    Struct(BuildData)
-    {
-        M_Layer flattened;
-
-        struct
-        {
-            M_ErrorList errors;
-        } cgen;
-
-        struct
-        {
-            M_ErrorList errors;
-            ShaderEntry *first_shader_entry;
-            ShaderEntry *last_shader_entry;
-            u64 shader_entries_count;
-        } gpugen;
-
-        struct
-        {
-            String obj_file;
-            String output;
-            i32 return_code;
-        } ccomp;
-
-        struct
-        {
-            GpuComp *array;
-            u32 count;
-        } gpucomps;
-
-        struct
-        {
-            M_ErrorList errors;
-            ArcInfoEntry *first_arc_entry;
-            ArcInfoEntry *last_arc_entry;
-            u64 arc_entries_count;
-        } arcinfogen;
-
-        struct
-        {
-            ResComp *array;
-            u32 count;
-        } rescomps;
-
-        struct
-        {
-            String output;
-            i32 return_code;
-        } link;
-    };
-
     BuildData *build = 0;
     if (lane->idx == 0)
     {
@@ -470,41 +301,27 @@ void BuildEntryPoint(WaveLaneCtx *lane, void *udata)
     i32 ret = 0;
 
     //////////////////////////////
-    //- Parse meta layers
+    //- Parse layers, generate final C file, generate final HLSL file, and gather resource archive info
 
     if (lane->idx == 0 && !ret)
     {
-        //- Lex layers
-        M_TokenFileList lexed = ZI;
+        //- Parse layers
         {
+            /* Lex */
             StringList src_dirs = ZI;
             PushStringToList(perm, &src_dirs, Lit("../src"));
-            lexed = M_TokensFromSrcDirs(perm, src_dirs);
-        }
+            M_TokenFileList lexed = M_TokensFromSrcDirs(perm, src_dirs);
 
-        //- Parse layers
-        M_LayerList parsed = ZI;
-        {
-            parsed = M_LayersFromTokenFiles(perm, lexed);
-        }
+            /* Parse */
+            M_LayerList parsed = M_LayersFromTokenFiles(perm, lexed);;
 
-        //- Flatten layers
-        {
+            /* Flatten */
             StringList starting_layer_names = ZI;
             PushStringToList(perm, &starting_layer_names, cmdline.leaf_layer_name);
             build->flattened = M_GetFlattenedEntries(perm, parsed, starting_layer_names);
         }
-    }
 
-    WaveSync(lane);
-    if (!ret) ret = build->flattened.errors.count > 0;
-
-    //////////////////////////////
-    //- Generate C & HLSL files
-
-    if (lane->idx == 0 && !ret)
-    {
-        /* Generate C file */
+        //- Generate C file
         {
             String c_out_file = F_GetFull(perm, StringF(perm, "%F_gen_c.c", FmtString(cmdline.leaf_layer_name)));
             StringList c_store_lines = ZI;
@@ -667,7 +484,7 @@ void BuildEntryPoint(WaveLaneCtx *lane, void *udata)
             }
         }
 
-        /* Generate HLSL file */
+        //- Generate HLSL file
         {
             /* Clear shader store */
             OS_Mkdir(shader_store_name);
@@ -780,72 +597,134 @@ void BuildEntryPoint(WaveLaneCtx *lane, void *udata)
                     F_ClearWrite(gpu_out_file, c_out);
                 }
             }
+
+            build->gpucomps.count = build->gpugen.shader_entries_count;
+            build->gpucomps.array = PushStructs(perm, GpuComp, build->gpucomps.count);
         }
 
-        build->gpucomps.count = build->gpugen.shader_entries_count;
-        build->gpucomps.array = PushStructs(perm, GpuComp, build->gpucomps.count);
+        //- Generate archive info
+        {
+            /* Gather archives from embedded dirs */
+            for (M_Entry *entry = build->flattened.first; entry->valid; entry = entry->next)
+            {
+                M_EntryKind kind = entry->kind;
+                M_Token *entry_tok = entry->name_token;
+                M_Token *arg0_tok = entry->arg_tokens[0];
+                M_Token *arg1_tok = entry->arg_tokens[1];
+                switch (kind)
+                {
+                    default: break;
+                    case M_EntryKind_EmbedDir:
+                    {
+                        if (arg0_tok->valid && arg1_tok->valid)
+                        {
+                            String store_name = arg0_tok->s;
+                            String token_file = arg1_tok->file->name;
+                            String token_parent_dir = F_GetParentDir(token_file);
+                            String arg_dir = arg1_tok->s;
+                            String full = F_GetFullCrossPlatform(perm, StringF(perm, "%F/%F", FmtString(token_parent_dir), FmtString(arg_dir)));
+                            if (F_IsDir(full))
+                            {
+                                ArcInfoEntry *arc = PushStruct(perm, ArcInfoEntry);
+                                arc->store_name = store_name;
+                                arc->dir_path = full;
+                                arc->out_path = StringF(perm, "%F.arc", FmtString(store_name));
+                                SllQueuePush(build->arcinfogen.first_arc_entry, build->arcinfogen.last_arc_entry, arc);
+                                ++build->arcinfogen.arc_entries_count;
+                            }
+                            else
+                            {
+                                String err = StringF(perm, "Directory '%F' not found", FmtString(full));
+                                M_PushError(perm, &build->arcinfogen.errors, arg1_tok, err);
+                            }
+                        }
+                        else
+                        {
+                            M_PushError(perm, &build->arcinfogen.errors, entry_tok, Lit("Expected resource store & directory name"));
+                        }
+                    } break;
+                }
+            }
+            /* Gather shader archive */
+            {
+                ArcInfoEntry *arc = PushStruct(perm, ArcInfoEntry);
+                arc->store_name = shader_store_name;
+                arc->dir_path = F_GetFullCrossPlatform(perm, shader_store_name);
+                arc->out_path = StringF(perm, "%F.arc", FmtString(shader_store_name));
+                SllQueuePush(build->arcinfogen.first_arc_entry, build->arcinfogen.last_arc_entry, arc);
+                ++build->arcinfogen.arc_entries_count;
+            }
+
+            build->rescomps.count = build->arcinfogen.arc_entries_count;
+            build->rescomps.array = PushStructs(perm, ResComp, build->rescomps.count);
+        }
     }
 
     WaveSync(lane);
     if (!ret) ret = build->cgen.errors.count > 0;
     if (!ret) ret = build->gpugen.errors.count > 0;
+    if (!ret) ret = build->arcinfogen.errors.count > 0;
+    if (!ret) ret = build->flattened.errors.count > 0;
 
     //////////////////////////////
     //- Compile C & Shaders
 
     if (!ret)
     {
-        /* Compile C */
-        u64 ccomp_task_idx = 0;
-        if (lane->idx == WaveLaneIdxFromTaskIdx(lane, ccomp_task_idx))
+        u64 task_idx = 0;
+
+        //- Compile C
         {
-            build->ccomp.obj_file = StringF(perm, "%F_gen_c.obj", FmtString(cmdline.leaf_layer_name));
-            String cmd =  StringF(perm,
-                                  "cl.exe /c %F -Fo:%F %F %F %F %F",
-                                  FmtString(c_out_file),
-                                  FmtString(build->ccomp.obj_file),
-                                  FmtString(StringFromList(perm, cp.flags_msvc, Lit(" "))),
-                                  FmtString(StringFromList(perm, cp.compiler_only_flags_msvc, Lit(" "))),
-                                  FmtString(StringFromList(perm, cp.warnings_msvc, Lit(" "))),
-                                  FmtString(StringFromList(perm, cp.defs, Lit(" "))));
-            OS_CommandResult cmd_result = OS_RunCommand(perm, cmd);
-            String cmd_output = TrimWhitespace(cmd_result.output);
-            build->ccomp.output = cmd_output;
-            build->ccomp.return_code = cmd_result.code;
+            if (lane->idx == WaveLaneIdxFromTaskIdx(lane, task_idx++))
+            {
+                build->ccomp.obj_file = StringF(perm, "%F_gen_c.obj", FmtString(cmdline.leaf_layer_name));
+                String cmd =  StringF(perm,
+                                      "cl.exe /c %F -Fo:%F %F %F %F %F",
+                                      FmtString(c_out_file),
+                                      FmtString(build->ccomp.obj_file),
+                                      FmtString(StringFromList(perm, cp.flags_msvc, Lit(" "))),
+                                      FmtString(StringFromList(perm, cp.compiler_only_flags_msvc, Lit(" "))),
+                                      FmtString(StringFromList(perm, cp.warnings_msvc, Lit(" "))),
+                                      FmtString(StringFromList(perm, cp.defs, Lit(" "))));
+                OS_CommandResult cmd_result = OS_RunCommand(perm, cmd);
+                String cmd_output = TrimWhitespace(cmd_result.output);
+                build->ccomp.output = cmd_output;
+                build->ccomp.return_code = cmd_result.code;
+            }
         }
 
-        /* Compile shaders */
-        u32 gpucomp_idx = 0;
-        for (ShaderEntry *e = build->gpugen.first_shader_entry; e; e = e->next)
+        //- Compile shaders
         {
-            /* NOTE: Using gpucomp_idx + 1 as task index for parralelism w/ C compilation */
-            u64 gpucomp_task_idx = gpucomp_idx + 1;
-            if (lane->idx == WaveLaneIdxFromTaskIdx(lane, gpucomp_task_idx))
+            u32 gpucomp_idx = 0;
+            for (ShaderEntry *e = build->gpugen.first_shader_entry; e; e = e->next)
             {
-                GpuComp *gpucomp = &build->gpucomps.array[gpucomp_idx];
-                String out_file = StringF(perm, "%F/%F", FmtString(shader_store_name), FmtString(e->name));
-                String target = e->kind == ShaderEntryKind_VS ? Lit("vs_6_6")
-                              : e->kind == ShaderEntryKind_PS ? Lit("ps_6_6")
-                              : e->kind == ShaderEntryKind_CS ? Lit("cs_6_6")
-                              : Lit("vs_6_6");
-                String compile_cmd = StringF(perm,
-                                             "dxc.exe -T %F -E %F -Fo %F %F %F %F",
-                                             FmtString(target),
-                                             FmtString(e->name),
-                                             FmtString(out_file),
-                                             FmtString(gpu_out_file),
-                                             FmtString(StringFromList(perm, cp.defs, Lit(" "))),
-                                             FmtString(StringFromList(perm, cp.flags_dxc, Lit(" "))));
-
-                OS_CommandResult cmd_result = OS_RunCommand(perm, compile_cmd);
-
-                if (cmd_result.code == 0)
+                if (lane->idx == WaveLaneIdxFromTaskIdx(lane, task_idx++))
                 {
-                    gpucomp->output = cmd_result.output;
-                    gpucomp->return_code = cmd_result.code;
+                    GpuComp *gpucomp = &build->gpucomps.array[gpucomp_idx];
+                    String out_file = StringF(perm, "%F/%F", FmtString(shader_store_name), FmtString(e->name));
+                    String target = e->kind == ShaderEntryKind_VS ? Lit("vs_6_6")
+                                  : e->kind == ShaderEntryKind_PS ? Lit("ps_6_6")
+                                  : e->kind == ShaderEntryKind_CS ? Lit("cs_6_6")
+                                  : Lit("vs_6_6");
+                    String compile_cmd = StringF(perm,
+                                                 "dxc.exe -T %F -E %F -Fo %F %F %F %F",
+                                                 FmtString(target),
+                                                 FmtString(e->name),
+                                                 FmtString(out_file),
+                                                 FmtString(gpu_out_file),
+                                                 FmtString(StringFromList(perm, cp.defs, Lit(" "))),
+                                                 FmtString(StringFromList(perm, cp.flags_dxc, Lit(" "))));
+
+                    OS_CommandResult cmd_result = OS_RunCommand(perm, compile_cmd);
+
+                    if (cmd_result.code == 0)
+                    {
+                        gpucomp->output = cmd_result.output;
+                        gpucomp->return_code = cmd_result.code;
+                    }
                 }
+                ++gpucomp_idx;
             }
-            ++gpucomp_idx;
         }
     }
 
@@ -856,69 +735,6 @@ void BuildEntryPoint(WaveLaneCtx *lane, void *udata)
         if (!ret) ret = build->gpucomps.array[i].return_code;
     }
 
-    //////////////////////////////
-    //- Gather resource archive info
-
-    if (lane->idx == 0 && !ret)
-    {
-        /* Gather archives from embedded dirs */
-        for (M_Entry *entry = build->flattened.first; entry->valid; entry = entry->next)
-        {
-            M_EntryKind kind = entry->kind;
-            M_Token *entry_tok = entry->name_token;
-            M_Token *arg0_tok = entry->arg_tokens[0];
-            M_Token *arg1_tok = entry->arg_tokens[1];
-            switch (kind)
-            {
-                default: break;
-                case M_EntryKind_EmbedDir:
-                {
-                    if (arg0_tok->valid && arg1_tok->valid)
-                    {
-                        String store_name = arg0_tok->s;
-                        String token_file = arg1_tok->file->name;
-                        String token_parent_dir = F_GetParentDir(token_file);
-                        String arg_dir = arg1_tok->s;
-                        String full = F_GetFullCrossPlatform(perm, StringF(perm, "%F/%F", FmtString(token_parent_dir), FmtString(arg_dir)));
-                        if (F_IsDir(full))
-                        {
-                            ArcInfoEntry *arc = PushStruct(perm, ArcInfoEntry);
-                            arc->store_name = store_name;
-                            arc->dir_path = full;
-                            arc->out_path = StringF(perm, "%F.arc", FmtString(store_name));
-                            SllQueuePush(build->arcinfogen.first_arc_entry, build->arcinfogen.last_arc_entry, arc);
-                            ++build->arcinfogen.arc_entries_count;
-                        }
-                        else
-                        {
-                            String err = StringF(perm, "Directory '%F' not found", FmtString(full));
-                            M_PushError(perm, &build->arcinfogen.errors, arg1_tok, err);
-                        }
-                    }
-                    else
-                    {
-                        M_PushError(perm, &build->arcinfogen.errors, entry_tok, Lit("Expected resource store & directory name"));
-                    }
-                } break;
-            }
-        }
-        /* Gather shader archive */
-        {
-            ArcInfoEntry *arc = PushStruct(perm, ArcInfoEntry);
-            arc->store_name = shader_store_name;
-            arc->dir_path = F_GetFullCrossPlatform(perm, shader_store_name);
-            arc->out_path = StringF(perm, "%F.arc", FmtString(shader_store_name));
-            SllQueuePush(build->arcinfogen.first_arc_entry, build->arcinfogen.last_arc_entry, arc);
-            ++build->arcinfogen.arc_entries_count;
-        }
-
-        build->rescomps.count = build->arcinfogen.arc_entries_count;
-        build->rescomps.array = PushStructs(perm, ResComp, build->rescomps.count);
-    }
-
-    WaveSync(lane);
-    if (!ret) ret = build->arcinfogen.errors.count > 0;
-
     //////////////////////////////
     //- Generate resource archives
 
@@ -927,7 +743,7 @@ void BuildEntryPoint(WaveLaneCtx *lane, void *udata)
         u32 task_idx = 0;
         for (ArcInfoEntry *entry = build->arcinfogen.first_arc_entry; entry; entry = entry->next)
         {
-            if (lane->idx == WaveLaneIdxFromTaskIdx(lane, task_idx))
+            if (lane->idx == WaveLaneIdxFromTaskIdx(lane, task_idx++))
             {
                 String dir_path = entry->dir_path;
                 String store_name = entry->store_name;
@@ -1031,7 +847,6 @@ void BuildEntryPoint(WaveLaneCtx *lane, void *udata)
                 F_ClearWrite(arc_path, arc_contents);
             }
         }
-        ++task_idx;
     }
 
     WaveSync(lane);
diff --git a/src/meta/meta.h b/src/meta/meta.h
index e69de29b..c687f7c1 100644
--- a/src/meta/meta.h
+++ b/src/meta/meta.h
@@ -0,0 +1,186 @@
+#define MetaRebuildCode 1317212284
+
+////////////////////////////////////////////////////////////
+//~ Base layer definitions
+
+#ifndef IsConsoleApp
+# define IsConsoleApp 1
+#endif
+
+#ifndef IsRtcEnabled
+# define IsRtcEnabled 1
+#endif
+
+#ifndef IsUnoptimized
+# define IsUnoptimized 1
+#endif
+
+#ifndef IsAsanEnabled
+# define IsAsanEnabled 0
+#endif
+
+#ifndef IsCrtlibEnabled
+# define IsCrtlibEnabled 1
+#endif
+
+#ifndef IsDebinfoEnabled
+# define IsDebinfoEnabled 1
+#endif
+
+#ifndef IsDeveloperModeEnabled
+# define IsDeveloperModeEnabled 1
+#endif
+
+#ifndef IsUnoptimized
+# define IsUnoptimized 1
+#endif
+
+#ifndef IsTestingEnabled
+# define IsTestingEnabled 0
+#endif
+
+#ifndef IsHotSwappingEnabled
+# define IsHotSwappingEnabled 0
+#endif
+
+////////////////////////////////////////////////////////////
+//~ Includes
+
+//- Header files
+#include "../base/base_inc.h"
+#include "meta_os/meta_os_inc.h"
+#include "meta_file/meta_file_inc.h"
+#include "meta_lay.h"
+
+//- Source files
+#include "meta_lay.c"
+
+////////////////////////////////////////////////////////////
+//~ Build types
+
+Struct(CompilerParams)
+{
+    StringList defs;
+
+    StringList warnings_msvc;
+    StringList warnings_clang;
+    StringList warnings_dxc;
+
+    StringList flags_msvc;
+    StringList flags_clang;
+    StringList flags_dxc;
+
+    StringList compiler_only_flags_msvc;
+    StringList compiler_only_flags_clang;
+
+    StringList linker_only_flags_msvc;
+    StringList linker_only_flags_clang;
+};
+
+Enum(ShaderEntryKind)
+{
+    ShaderEntryKind_VS,
+    ShaderEntryKind_PS,
+    ShaderEntryKind_CS,
+};
+
+Struct(ShaderEntry)
+{
+    ShaderEntry *next;
+    ShaderEntryKind kind;
+    String name;
+};
+
+Struct(ArcInfoEntry)
+{
+    ArcInfoEntry *next;
+    String dir_path;
+    String store_name;
+    String out_path;
+};
+
+Struct(GpuComp)
+{
+    String output;
+    i32 return_code;
+};
+
+Struct(ResComp)
+{
+    String obj_file;
+    String output;
+    i32 return_code;
+};
+
+Struct(BuildData)
+{
+    M_Layer flattened;
+
+    struct
+    {
+        M_ErrorList errors;
+    } cgen;
+
+    struct
+    {
+        M_ErrorList errors;
+        ShaderEntry *first_shader_entry;
+        ShaderEntry *last_shader_entry;
+        u64 shader_entries_count;
+    } gpugen;
+
+    struct
+    {
+        String obj_file;
+        String output;
+        i32 return_code;
+    } ccomp;
+
+    struct
+    {
+        GpuComp *array;
+        u32 count;
+    } gpucomps;
+
+    struct
+    {
+        M_ErrorList errors;
+        ArcInfoEntry *first_arc_entry;
+        ArcInfoEntry *last_arc_entry;
+        u64 arc_entries_count;
+    } arcinfogen;
+
+    struct
+    {
+        ResComp *array;
+        u32 count;
+    } rescomps;
+
+    struct
+    {
+        String output;
+        i32 return_code;
+    } link;
+};
+
+////////////////////////////////////////////////////////////
+//~ Helper types
+
+Struct(LineCol)
+{
+    i64 line;
+    i64 col;
+};
+
+////////////////////////////////////////////////////////////
+//~ Helpers
+
+void EchoLine(String msg);
+void EchoLineOrNothing(String msg);
+LineCol LineColFromPos(String data, i64 pos);
+String StringFromMetaErrors(Arena *arena, M_ErrorList errors);
+
+////////////////////////////////////////////////////////////
+//~ Build
+
+void BuildEntryPoint(WaveLaneCtx *lane);
diff --git a/src/platform/platform_win32/platform_win32.c b/src/platform/platform_win32/platform_win32.c
index 473c7289..06e117a1 100644
--- a/src/platform/platform_win32/platform_win32.c
+++ b/src/platform/platform_win32/platform_win32.c
@@ -157,7 +157,7 @@ P_Address P_W32_PlatformAddressFromWin32Address(P_W32_Address ws_addr)
 ////////////////////////////////////////////////////////////
 //~ Timer job
 
-void P_W32_SyncTimerForever(WaveLaneCtx *lane, void *udata)
+void P_W32_SyncTimerForever(WaveLaneCtx *lane)
 {
     P_W32_SharedState *g = &P_W32_shared_state;
     SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_TIME_CRITICAL);
diff --git a/src/platform/platform_win32/platform_win32.h b/src/platform/platform_win32/platform_win32.h
index 180677a1..5517d0b4 100644
--- a/src/platform/platform_win32/platform_win32.h
+++ b/src/platform/platform_win32/platform_win32.h
@@ -103,4 +103,4 @@ P_Address P_W32_PlatformAddressFromWin32Address(P_W32_Address ws_addr);
 ////////////////////////////////////////////////////////////
 //~ Timer job
 
-void P_W32_SyncTimerForever(WaveLaneCtx *lane, void *udata);
+void P_W32_SyncTimerForever(WaveLaneCtx *lane);
diff --git a/src/proto/proto.c b/src/proto/proto.c
index 7ce1dc96..9e329fcd 100644
--- a/src/proto/proto.c
+++ b/src/proto/proto.c
@@ -1,4 +1,4 @@
-void PT_RunForever(WaveLaneCtx *lane, void *udata)
+void PT_RunForever(WaveLaneCtx *lane)
 {
     GPU_ArenaHandle gpu_frame_arena = GPU_AcquireArena();
 
diff --git a/src/window/window_win32/window_win32.c b/src/window/window_win32/window_win32.c
index 4abc2c9f..ad15dda0 100644
--- a/src/window/window_win32/window_win32.c
+++ b/src/window/window_win32/window_win32.c
@@ -101,7 +101,7 @@ WND_W32_Window *WND_W32_WindowFromHandle(WND_Handle handle)
 //~ Initialization
 
 /* Win32 limitation: Window must be initialized on same thread that processes events */
-void WND_W32_ProcessMessagesForever(WaveLaneCtx *lane, void *udata)
+void WND_W32_ProcessMessagesForever(WaveLaneCtx *lane)
 {
     WND_W32_SharedState *g = &WND_W32_shared_state;
     WND_W32_Window *window = &g->window;
diff --git a/src/window/window_win32/window_win32.h b/src/window/window_win32/window_win32.h
index 37016e6c..14d10402 100644
--- a/src/window/window_win32/window_win32.h
+++ b/src/window/window_win32/window_win32.h
@@ -77,7 +77,7 @@ WND_W32_Window *WND_W32_WindowFromHandle(WND_Handle handle);
 ////////////////////////////////////////////////////////////
 //~ Initialization
 
-void WND_W32_ProcessMessagesForever(WaveLaneCtx *lane, void *udata);
+void WND_W32_ProcessMessagesForever(WaveLaneCtx *lane);
 
 ////////////////////////////////////////////////////////////
 //~ Message processing