diff --git a/deps/gdb_server/gdb/gdb_server.h b/deps/gdb_server/gdb/gdb_server.h
index e37bce09..7d151e57 100644
--- a/deps/gdb_server/gdb/gdb_server.h
+++ b/deps/gdb_server/gdb/gdb_server.h
@@ -303,6 +303,15 @@ gdb_server_t *gdb_server_create(gdb_target_t *target, int port) {
     return NULL;
   }
 
+#if PLATFORM_WINDOWS
+  WSADATA wsadata;
+  int r = WSAStartup(MAKEWORD(2, 2), &wsadata);
+  if (r) {
+    GDB_SERVER_LOG("Failed to initialize WinSock");
+    return NULL;
+  }
+#endif
+
   gdb_server_t *sv = (gdb_server_t *)GDB_SERVER_MALLOC(sizeof(gdb_server_t));
   memset(sv, 0, sizeof(*sv));
   sv->target = *target;
@@ -310,8 +319,8 @@ gdb_server_t *gdb_server_create(gdb_target_t *target, int port) {
   sv->client = INVALID_SOCKET;
 
   if (gdb_server_create_listen(sv, port) == -1) {
-    GDB_SERVER_FREE(sv);
-    sv = NULL;
+    gdb_server_destroy(sv);
+    return NULL;
   }
 
   return sv;
@@ -346,6 +355,11 @@ void gdb_server_destroy(gdb_server_t *sv) {
   gdb_server_destroy_listen(sv);
 
   GDB_SERVER_FREE(sv);
+
+#if PLATFORM_WINDOWS
+  int r = WSACleanup();
+  GDB_SERVER_ASSERT(r == 0);
+#endif
 }
 
 //
@@ -414,6 +428,10 @@ static int gdb_server_create_listen(gdb_server_t *sv, int port) {
 // destroy the listen server
 //
 static void gdb_server_destroy_listen(gdb_server_t *sv) {
+  if (sv->listen == INVALID_SOCKET) {
+    return;
+  }
+
   gdb_server_destroy_client(sv);
 
   shutdown(sv->listen, SHUT_RDWR);
diff --git a/src/core/assert.h b/src/core/assert.h
index d371e745..3df6122c 100644
--- a/src/core/assert.h
+++ b/src/core/assert.h
@@ -54,7 +54,7 @@ const char *format_check_error(const char *filename, int linenum,
   do {                                                                 \
     if (!CHECK_EXPECT_TRUE(!strcmp(v1, v2))) {                         \
       const char *msg = FORMAT_CHECK_ERROR(                            \
-          __FILE__, __LINE__, "Expected '" #v1 "' to eq '" #v2 "'", 0, \
+          __FILE__, __LINE__, "expected '" #v1 "' to eq '" #v2 "'", 0, \
           ##__VA_ARGS__);                                              \
       LOG_FATAL(msg);                                                  \
     }                                                                  \
diff --git a/src/core/sort.c b/src/core/sort.c
index 805e5c1b..0a482672 100644
--- a/src/core/sort.c
+++ b/src/core/sort.c
@@ -1,8 +1,9 @@
+#include <stdint.h>
 #include <stdlib.h>
 #include <string.h>
 #include "core/sort.h"
 
-static void merge(void *in, void *out, size_t size, int l, int m, int r,
+static void merge(uint8_t *in, uint8_t *out, size_t size, int l, int m, int r,
                   sort_cmp cmp) {
   int i = l;
   int j = m;
@@ -21,7 +22,7 @@ static void merge(void *in, void *out, size_t size, int l, int m, int r,
   }
 }
 
-static void msort_r(void *in, void *out, size_t size, int l, int r,
+static void msort_r(uint8_t *in, uint8_t *out, size_t size, int l, int r,
                     sort_cmp cmp) {
   if ((r - l) < 2) {
     return;
diff --git a/src/core/thread.h b/src/core/thread.h
index fa664dd6..3f5fa5ee 100644
--- a/src/core/thread.h
+++ b/src/core/thread.h
@@ -42,7 +42,7 @@ void cond_destroy(cond_t cond);
  * sleeping
  */
 #if PLATFORM_WINDOWS
-#include <Synchapi.h>
+#include <windows.h>
 #define sleep Sleep
 #else
 #include <unistd.h>
diff --git a/src/dreamcast.c b/src/dreamcast.c
index 9f1e7c9e..79b280bc 100644
--- a/src/dreamcast.c
+++ b/src/dreamcast.c
@@ -131,10 +131,12 @@ int dc_load(struct dreamcast *dc, const char *path) {
 
 int dc_init(struct dreamcast *dc) {
   if (dc->debugger && !debugger_init(dc->debugger)) {
+    LOG_WARNING("failed to initialize debugger");
     return 0;
   }
 
   if (!memory_init(dc->memory)) {
+    LOG_WARNING("failed to initialize shared memory");
     return 0;
   }
 
@@ -159,11 +161,13 @@ int dc_init(struct dreamcast *dc) {
   /* initialize each device */
   list_for_each_entry(dev, &dc->devices, struct device, it) {
     if (!dev->init(dev)) {
+      LOG_WARNING("failed to initialize device '%s'", dev->name);
       return 0;
     }
   }
 
   if (!bios_init(dc->bios)) {
+    LOG_WARNING("failed to initialize bios");
     return 0;
   }
 
diff --git a/src/emulator.c b/src/emulator.c
index ed625c8c..f9de6e95 100644
--- a/src/emulator.c
+++ b/src/emulator.c
@@ -362,7 +362,7 @@ static void *emu_video_thread(void *data) {
   struct emu *emu = data;
 
   /* make secondary context active for this thread */
-  r_make_current(emu->r2);
+  r_bind_context(emu->r2);
 
   while (1) {
     mutex_lock(emu->pending_mutex);
@@ -399,6 +399,10 @@ static void *emu_video_thread(void *data) {
     mutex_unlock(emu->pending_mutex);
   }
 
+  /* unbind context from this thread before it dies, otherwise the main thread
+     may not be able to bind it in order to clean it up */
+  r_unbind_context(emu->r2);
+
   return NULL;
 }
 
@@ -619,7 +623,7 @@ static void emu_host_context_destroyed(void *userdata) {
   /* destroy the video thread */
   if (emu->multi_threaded) {
     mutex_lock(emu->pending_mutex);
-    emu->pending_ctx = (struct tile_context *)0xdeadbeef;
+    emu->pending_ctx = (struct tile_context *)(intptr_t)0xdeadbeef;
     cond_signal(emu->pending_cond);
     mutex_unlock(emu->pending_mutex);
 
@@ -632,8 +636,7 @@ static void emu_host_context_destroyed(void *userdata) {
 
   /* destroy video renderer */
   struct render_backend *r2 = emu_video_renderer(emu);
-
-  r_make_current(r2);
+  r_bind_context(r2);
 
   r_destroy_framebuffer(r2, emu->video_fb);
   if (emu->video_sync) {
@@ -647,7 +650,7 @@ static void emu_host_context_destroyed(void *userdata) {
   }
 
   /* destroy primary renderer */
-  r_make_current(emu->r);
+  r_bind_context(emu->r);
 
   mp_destroy(emu->mp);
   imgui_destroy(emu->imgui);
@@ -674,20 +677,19 @@ static void emu_host_context_reset(void *userdata) {
   }
 
   struct render_backend *r2 = emu_video_renderer(emu);
-
-  r_make_current(r2);
+  r_bind_context(r2);
 
   emu->video_fb = r_create_framebuffer(r2, emu->video_width, emu->video_height,
                                        &emu->video_tex);
 
+  /* make primary renderer active for the current thread */
+  r_bind_context(emu->r);
+
   /* startup video thread */
   if (emu->multi_threaded) {
     emu->video_thread = thread_create(&emu_video_thread, NULL, emu);
     CHECK_NOTNULL(emu->video_thread);
   }
-
-  /* make primary renderer active for the current thread */
-  r_make_current(emu->r);
 }
 
 static void emu_host_resized(void *userdata) {
diff --git a/src/hw/gdrom/gdi.c b/src/hw/gdrom/gdi.c
index 366b05d4..46e4747c 100644
--- a/src/hw/gdrom/gdi.c
+++ b/src/hw/gdrom/gdi.c
@@ -21,7 +21,7 @@ static int gdi_read_sector(struct disc *disc, int fad, enum gd_secfmt fmt,
   CHECK(mask == MASK_DATA);
 
   /* open the file backing the track */
-  int n = track - gdi->tracks;
+  int n = (int)(track - gdi->tracks);
   FILE *fp = gdi->files[n];
 
   if (!fp) {
diff --git a/src/hw/gdrom/gdrom.c b/src/hw/gdrom/gdrom.c
index 68b7e6cc..3942d1bc 100644
--- a/src/hw/gdrom/gdrom.c
+++ b/src/hw/gdrom/gdrom.c
@@ -207,7 +207,7 @@ static void gdrom_spi_data(struct gdrom *gd, int arg) {
   int offset = gd->pio_offset;
   uint8_t *data = gd->pio_buffer;
   int size = gd->pio_size;
-  memcpy((void *)&gd->hw_info + offset, data, size);
+  memcpy((uint8_t *)&gd->hw_info + offset, data, size);
 
   gdrom_spi_end(gd);
 }
@@ -249,7 +249,7 @@ static void gdrom_spi_cmd(struct gdrom *gd, int arg) {
       int offset = data[2];
       int size = data[4];
 
-      gdrom_spi_write(gd, (void *)&gd->hw_info + offset, size);
+      gdrom_spi_write(gd, (uint8_t *)&gd->hw_info + offset, size);
     } break;
 
     case SPI_REQ_ERROR: {
diff --git a/src/hw/rom/boot.c b/src/hw/rom/boot.c
index 02669f26..e57adcf4 100644
--- a/src/hw/rom/boot.c
+++ b/src/hw/rom/boot.c
@@ -64,7 +64,7 @@ static int boot_load_rom(struct boot *boot) {
   fclose(fp);
 
   if (!boot_validate(boot)) {
-    LOG_WARNING("invalid BIOS file");
+    LOG_WARNING("failed to validate boot rom");
     return 0;
   }
 
diff --git a/src/jit/backend/interp/interp_backend.c b/src/jit/backend/interp/interp_backend.c
index 3d1e85fb..7e3d499d 100644
--- a/src/jit/backend/interp/interp_backend.c
+++ b/src/jit/backend/interp/interp_backend.c
@@ -11,10 +11,10 @@ static void interp_backend_run_code(struct jit_backend *base, int cycles) {
   struct interp_backend *backend = (struct interp_backend *)base;
   struct jit *jit = backend->jit;
   struct jit_guest *guest = jit->guest;
-  void *ctx = guest->ctx;
-  uint32_t *pc = ctx + guest->offset_pc;
-  int32_t *run_cycles = ctx + guest->offset_cycles;
-  int32_t *ran_instrs = ctx + guest->offset_instrs;
+  uint8_t *ctx = guest->ctx;
+  uint32_t *pc = (uint32_t *)(ctx + guest->offset_pc);
+  int32_t *run_cycles = (int32_t *)(ctx + guest->offset_cycles);
+  int32_t *ran_instrs = (int32_t *)(ctx + guest->offset_instrs);
 
   *run_cycles = cycles;
   *ran_instrs = 0;
diff --git a/src/render/gl_backend.c b/src/render/gl_backend.c
index c940980f..29f73190 100644
--- a/src/render/gl_backend.c
+++ b/src/render/gl_backend.c
@@ -829,7 +829,11 @@ void r_set_debug_flag(struct render_backend *r, int flag) {
   r->debug_flags |= flag;
 }
 
-void r_make_current(struct render_backend *r) {
+void r_unbind_context(struct render_backend *r) {
+  video_gl_make_current(r->host, NULL);
+}
+
+void r_bind_context(struct render_backend *r) {
   video_gl_make_current(r->host, r->ctx);
 }
 
diff --git a/src/render/render_backend.h b/src/render/render_backend.h
index 8351d676..9eaddb19 100644
--- a/src/render/render_backend.h
+++ b/src/render/render_backend.h
@@ -136,7 +136,8 @@ struct render_backend *r_create(struct host *host);
 struct render_backend *r_create_from(struct render_backend *other);
 void r_destroy(struct render_backend *rc);
 
-void r_make_current(struct render_backend *r);
+void r_bind_context(struct render_backend *r);
+void r_unbind_context(struct render_backend *r);
 
 void r_set_debug_flag(struct render_backend *r, int flag);
 int r_get_debug_flag(struct render_backend *r, int flag);
diff --git a/src/tracer.c b/src/tracer.c
index 8b635861..b5c7e74b 100644
--- a/src/tracer.c
+++ b/src/tracer.c
@@ -559,7 +559,7 @@ static void tracer_render_side_menu(struct tracer *tracer) {
     igSetWindowPos(pos, ImGuiSetCond_Once);
 
     int i = 0;
-    int tex_per_row = MAX(igGetContentRegionAvailWidth() / 44, 1);
+    int tex_per_row = MAX((int)(igGetContentRegionAvailWidth() / 44.0f), 1);
 
     rb_for_each_entry(tex, &tracer->live_textures, struct tracer_texture,
                       live_it) {