diff --git a/toonz/sources/CMakeLists.txt b/toonz/sources/CMakeLists.txt
index e0ac08b..2e621d7 100644
--- a/toonz/sources/CMakeLists.txt
+++ b/toonz/sources/CMakeLists.txt
@@ -406,9 +406,6 @@ elseif(BUILD_ENV_APPLE)
     pkg_check_modules(MYPAINT_LIB REQUIRED libmypaint)
 elseif(BUILD_ENV_UNIXLIKE)
     if(BUILD_TARGET_WIN)
-        if(PLATFORM EQUAL 32)
-            set(QT_LIB ${SDKROOT}/quicktime/QT73SDK/Libraries/QTMLClient.lib)
-        endif()
         find_library(GL_LIB opengl32)
         find_library(GLU_LIB glu32)
         find_library(GLUT_LIB NAMES glut freeglut)
@@ -611,7 +608,7 @@ if(BUILD_ENV_APPLE)
     add_subdirectory(mousedragfilter)
 endif()
 
-if((PLATFORM EQUAL 32) AND (BUILD_TARGET_WIN OR BUILD_TARGET_APPLE))
+if((PLATFORM EQUAL 32) AND ((BUILD_TARGET_WIN AND BUILD_ENV_MSVC) OR BUILD_TARGET_APPLE))
     add_subdirectory(t32bitsrv)
 endif()
 
diff --git a/toonz/sources/common/tfx/ttzpimagefx.cpp b/toonz/sources/common/tfx/ttzpimagefx.cpp
index 31d3f84..c2c0fdc 100644
--- a/toonz/sources/common/tfx/ttzpimagefx.cpp
+++ b/toonz/sources/common/tfx/ttzpimagefx.cpp
@@ -10,7 +10,7 @@
 //**********************************************************************************************
 
 void parseIndexes(std::string indexes, std::vector<std::string> &items) {
-#ifdef _WIN32
+#ifdef _MSC_VER
   char seps[] = " ,;";
   char *token;
   if (indexes == "all" || indexes == "All" || indexes == "ALL")
@@ -38,7 +38,7 @@ void parseIndexes(std::string indexes, std::vector<std::string> &items) {
 
 void insertIndexes(std::vector<std::string> items,
                    PaletteFilterFxRenderData *t) {
-#ifdef _WIN32
+#ifdef _MSC_VER
   for (int i = 0; i < (int)items.size(); i++) {
     char *starttoken, *endtoken;
     char subseps[]  = "-";
diff --git a/toonz/sources/common/tiio/movsettings.cpp b/toonz/sources/common/tiio/movsettings.cpp
index e8cb9c2..4b095fb 100644
--- a/toonz/sources/common/tiio/movsettings.cpp
+++ b/toonz/sources/common/tiio/movsettings.cpp
@@ -7,7 +7,7 @@
 #include "tproperty.h"
 #include "tiio.h"
 
-#if !(defined(x64) || defined(__LP64__) || defined(LINUX))
+#if !defined(x64) && !defined(__LP64__) && !defined(LINUX) && !(defined(__GNUC__) && defined(_WIN32))
 
 //*******************************************************************************
 //    32-bit version
diff --git a/toonz/sources/common/trop/tblur.cpp b/toonz/sources/common/trop/tblur.cpp
index d3a21c9..ff92e11 100644
--- a/toonz/sources/common/trop/tblur.cpp
+++ b/toonz/sources/common/trop/tblur.cpp
@@ -3,11 +3,17 @@
 #include "traster.h"
 #include "trop.h"
 #include "tpixelgr.h"
-#ifdef _WIN32
+
+#if defined(_WIN32) && defined(x64)
+#define USE_SSE2
+#endif
+
+#ifdef USE_SSE2
 #include <emmintrin.h>
 #include <malloc.h>
 #endif
 
+
 namespace {
 
 #ifdef _WIN32
@@ -223,7 +229,7 @@ inline void blur_code(PIXEL_SRC *row1, PIXEL_DST *row2, int length, float coeff,
 
 //-------------------------------------------------------------------
 
-#ifdef _WIN32
+#ifdef USE_SSE2
 
 //-------------------------------------------------------------------
 template <class T, class P>
@@ -556,7 +562,7 @@ void load_channel_col32(float *buffer, float *col, int lx, int ly, int x,
 template <class T, class Q, class P>
 void do_filtering_chan(BlurPixel<P> *row1, T *row2, int length, float coeff,
                        float coeffq, int brad, float diff, bool useSSE) {
-#ifdef _WIN32
+#ifdef USE_SSE2
   if (useSSE && T::maxChannelValue == 255)
     blur_code_SSE2<T, P>(row1, row2, length, coeff, coeffq, brad, diff, 0.5);
   else
@@ -744,7 +750,7 @@ void do_filtering_floatRgb(T *row1, BlurPixel<P> *row2, int length, float coeff,
   BLUR_CODE(0, unsigned char)
 */
 
-#ifdef _WIN32
+#ifdef USE_SSE2
   if (useSSE)
     blur_code_SSE2<T, P>(row1, row2, length, coeff, coeffq, brad, diff, 0);
   else
diff --git a/toonz/sources/common/trop/toperators.cpp b/toonz/sources/common/trop/toperators.cpp
index 2d73c8d..a1bb38b 100644
--- a/toonz/sources/common/trop/toperators.cpp
+++ b/toonz/sources/common/trop/toperators.cpp
@@ -4,9 +4,17 @@
 #include "tpixel.h"
 #include "tpixelutils.h"
 
-#ifdef _WIN32
+// calls to _mm_* functions disabled in code for now (marked as comment)
+// so disable include <emmintrin.h>
+/*
+#if defined(_WIN32) && defined(x64)
+  #define ENABLE_SSE2
+#endif
+
+#ifdef ENABLE_SSE2
 #include <emmintrin.h>  // per SSE2
 #endif
+ */
 
 namespace {
 inline double luminance(TPixel32 *pix) {
diff --git a/toonz/sources/common/trop/tover.cpp b/toonz/sources/common/trop/tover.cpp
index 208919e..aae900f 100644
--- a/toonz/sources/common/trop/tover.cpp
+++ b/toonz/sources/common/trop/tover.cpp
@@ -7,7 +7,11 @@
 #include "tropcm.h"
 #include "tpalette.h"
 
-#ifdef _WIN32
+#if defined(_WIN32) && defined(x64)
+#define USE_SSE2
+#endif
+
+#ifdef USE_SSE2
 #include <emmintrin.h>  // per SSE2
 #endif
 
@@ -156,7 +160,7 @@ void do_overT2(TRasterPT<T> rout, const TRasterPT<T> &rup) {
 
 //-----------------------------------------------------------------------------
 
-#ifdef _WIN32
+#ifdef USE_SSE2
 
 void do_over_SSE2(TRaster32P rout, const TRaster32P &rup) {
   __m128i zeros = _mm_setzero_si128();
@@ -331,7 +335,7 @@ void TRop::over(const TRasterP &rout, const TRasterP &rup, const TPoint &pos) {
 
   // TRaster64P rout64 = rout, rin64 = rin;
   if (rout32 && rup32) {
-#ifdef _WIN32
+#ifdef USE_SSE2
     if (TSystem::getCPUExtensions() & TSystem::CpuSupportsSse2)
       do_over_SSE2(rout32, rup32);
     else
diff --git a/toonz/sources/common/trop/tresample.cpp b/toonz/sources/common/trop/tresample.cpp
index b1fc6f3..d6b588d 100644
--- a/toonz/sources/common/trop/tresample.cpp
+++ b/toonz/sources/common/trop/tresample.cpp
@@ -18,7 +18,11 @@
 
 using namespace TConsts;
 
-#ifdef _WIN32
+#if defined(_WIN32) && defined(x64)
+#define USE_SSE2
+#endif
+
+#ifdef USE_SSE2
 #include <emmintrin.h>  // per SSE2
 #endif
 
@@ -1345,7 +1349,7 @@ void resample_main_rgbm(TRasterPT<T> rout, const TRasterPT<T> &rin,
 
 //---------------------------------------------------------------------------
 
-#ifdef _WIN32
+#ifdef USE_SSE2
 
 namespace {
 
@@ -2563,7 +2567,7 @@ void rop_resample_rgbm(TRasterPT<T> rout, const TRasterPT<T> &rin,
     }
   }
 
-#ifdef _WIN32
+#ifdef USE_SSE2
   if ((TSystem::getCPUExtensions() & TSystem::CpuSupportsSse2) &&
       T::maxChannelValue == 255)
     resample_main_rgbm_SSE2<T>(rout, rin, aff_xy2uv, aff0_uv2fg, min_pix_ref_u,
@@ -3205,7 +3209,7 @@ void do_resample(TRasterCM32P rout, const TRasterCM32P &rin,
 
 //-----------------------------------------------------------------------------
 
-#ifdef _WIN32
+#ifdef USE_SSE2
 template <class T>
 void resample_main_cm32_rgbm_SSE2(TRasterPT<T> rout, const TRasterCM32P &rin,
                                   const TAffine &aff_xy2uv,
@@ -4593,7 +4597,7 @@ void rop_resample_rgbm_2(TRasterPT<T> rout, const TRasterCM32P &rin,
     }
   }
 
-#ifdef _MSC_VER
+#if defined(USE_SSE2) && defined(_MSC_VER)
   TRaster32P rout32 = rout;
   if ((TSystem::getCPUExtensions() & TSystem::CpuSupportsSse2) && rout32)
     resample_main_cm32_rgbm_SSE2<TPixel32>(
diff --git a/toonz/sources/common/trop/tropcm.cpp b/toonz/sources/common/trop/tropcm.cpp
index 706adba..777dd91 100644
--- a/toonz/sources/common/trop/tropcm.cpp
+++ b/toonz/sources/common/trop/tropcm.cpp
@@ -23,7 +23,7 @@ extern "C" {
 #include "toonz4.6/raster.h"
 }
 
-#ifdef _WIN32
+#if defined(_WIN32) && defined(x64)
 #define USE_SSE2
 #endif
 
@@ -75,7 +75,7 @@ void TRop::convert(const TRaster32P &rasOut, const TRasterCM32P &rasIn,
 
   rasOut->lock();
   rasIn->lock();
-#ifdef _WIN32
+#ifdef USE_SSE2
   if (TSystem::getCPUExtensions() & TSystem::CpuSupportsSse2) {
     __m128i zeros = _mm_setzero_si128();
     TPixelFloat *paints =
diff --git a/toonz/sources/common/tvrender/tofflinegl.cpp b/toonz/sources/common/tvrender/tofflinegl.cpp
index b4a3c83..8783c0a 100644
--- a/toonz/sources/common/tvrender/tofflinegl.cpp
+++ b/toonz/sources/common/tvrender/tofflinegl.cpp
@@ -240,7 +240,22 @@ public:
   {
     void *b = buffer;  // Pointer To The Buffer
 
-#ifdef x64
+#if !defined(x64) && defined(_MSC_VER)
+    __asm        // Assembler Code To Follow
+    {
+        mov ecx, bufferSize  // Counter Set To Dimensions Of Our Memory Block
+        mov ebx, b  // Points ebx To Our Data (b)
+        label:  // Label Used For Looping
+          mov al,[ebx+0]  // Loads Value At ebx Into al
+          mov ah,[ebx+2]  // Loads Value At ebx+2 Into ah
+          mov [ebx+2],al  // Stores Value In al At ebx+2
+          mov [ebx+0],ah  // Stores Value In ah At ebx
+
+          add ebx,4  // Moves Through The Data By 4 Bytes
+          dec ecx  // Decreases Our Loop Counter
+          jnz label  // If Not Zero Jump Back To Label
+    }
+#else
     int size   = bufferSize;
     UCHAR *pix = (UCHAR *)b;
     while (size > 0) {
@@ -261,21 +276,6 @@ public:
                 ebx+=4;
             size--;
           }*/
-#else
-    __asm        // Assembler Code To Follow
-    {
-        mov ecx, bufferSize  // Counter Set To Dimensions Of Our Memory Block
-        mov ebx, b  // Points ebx To Our Data (b)
-        label:  // Label Used For Looping
-          mov al,[ebx+0]  // Loads Value At ebx Into al
-          mov ah,[ebx+2]  // Loads Value At ebx+2 Into ah
-          mov [ebx+2],al  // Stores Value In al At ebx+2
-          mov [ebx+0],ah  // Stores Value In ah At ebx
-
-          add ebx,4  // Moves Through The Data By 4 Bytes
-          dec ecx  // Decreases Our Loop Counter
-          jnz label  // If Not Zero Jump Back To Label
-    }
 #endif
   }
 
diff --git a/toonz/sources/image/3gp/tiio_3gp.h b/toonz/sources/image/3gp/tiio_3gp.h
index 631dfbe..6d11800 100644
--- a/toonz/sources/image/3gp/tiio_3gp.h
+++ b/toonz/sources/image/3gp/tiio_3gp.h
@@ -3,7 +3,7 @@
 #ifndef TIIO_3GP_H
 #define TIIO_3_H
 
-#ifdef x64
+#if defined(x64) || (defined(__GNUC__) && defined(_WIN32))
 #include "tiio_3gp_proxy.h"
 #else
 
diff --git a/toonz/sources/image/3gp/tiio_3gpW.cpp b/toonz/sources/image/3gp/tiio_3gpW.cpp
index 0a7472f..669bdec 100644
--- a/toonz/sources/image/3gp/tiio_3gpW.cpp
+++ b/toonz/sources/image/3gp/tiio_3gpW.cpp
@@ -1,6 +1,6 @@
 
 
-#ifndef x64
+#if !defined(x64) && !(defined(__GNUC__) && defined(_WIN32))
 
 #include <cstdint>
 
diff --git a/toonz/sources/image/3gp/tiio_3gp_proxy.cpp b/toonz/sources/image/3gp/tiio_3gp_proxy.cpp
index 76c82a5..4fba3d8 100644
--- a/toonz/sources/image/3gp/tiio_3gp_proxy.cpp
+++ b/toonz/sources/image/3gp/tiio_3gp_proxy.cpp
@@ -1,6 +1,6 @@
 
 
-#if (defined(x64) || defined(__LP64__) || defined(LINUX))
+#if defined(x64) || defined(__LP64__) || defined(LINUX) || (defined(_WIN32) && defined(__GNUC__))
 
 // Toonz includes
 #include "tfilepath.h"
diff --git a/toonz/sources/image/3gp/tiio_3gp_proxy.h b/toonz/sources/image/3gp/tiio_3gp_proxy.h
index db8a539..744769e 100644
--- a/toonz/sources/image/3gp/tiio_3gp_proxy.h
+++ b/toonz/sources/image/3gp/tiio_3gp_proxy.h
@@ -3,7 +3,7 @@
 #ifndef TIIO_3GP_PROXY_H
 #define TIIO_3GP_PROXY_H
 
-#if defined(x64) || defined(__LP64__) || defined(LINUX)
+#if defined(x64) || defined(__LP64__) || defined(LINUX) || (defined(_WIN32) && defined(__GNUC__))
 
 // Qt includes
 #include <QString>
diff --git a/toonz/sources/image/mov/tiio_mov.h b/toonz/sources/image/mov/tiio_mov.h
index 2e58cd8..37990f6 100644
--- a/toonz/sources/image/mov/tiio_mov.h
+++ b/toonz/sources/image/mov/tiio_mov.h
@@ -3,7 +3,7 @@
 #ifndef TIIO_MOV_H
 #define TIIO_MOV_H
 
-#ifdef x64
+#if defined(x64) || (defined(__GNUC__) && defined(_WIN32))
 #include "tiio_mov_proxy.h"
 #else
 
diff --git a/toonz/sources/image/mov/tiio_movW.cpp b/toonz/sources/image/mov/tiio_movW.cpp
index 0b07b7c..f026920 100644
--- a/toonz/sources/image/mov/tiio_movW.cpp
+++ b/toonz/sources/image/mov/tiio_movW.cpp
@@ -1,6 +1,6 @@
 
 
-#ifndef x64
+#if !defined(x64) && !(defined(__GNUC__) && defined(_WIN32))
 
 #include "texception.h"
 #include "tsound.h"
diff --git a/toonz/sources/image/mov/tiio_mov_proxy.cpp b/toonz/sources/image/mov/tiio_mov_proxy.cpp
index f8fa95f..816171d 100644
--- a/toonz/sources/image/mov/tiio_mov_proxy.cpp
+++ b/toonz/sources/image/mov/tiio_mov_proxy.cpp
@@ -1,6 +1,6 @@
 
 
-#if (defined(x64) || defined(__LP64__) || defined(LINUX))
+#if defined(x64) || defined(__LP64__) || defined(LINUX) || (defined(_WIN32) && defined(__GNUC__))
 
 // Toonz includes
 #include "tfilepath.h"
diff --git a/toonz/sources/image/mov/tiio_mov_proxy.h b/toonz/sources/image/mov/tiio_mov_proxy.h
index 386c79d..68d0c88 100644
--- a/toonz/sources/image/mov/tiio_mov_proxy.h
+++ b/toonz/sources/image/mov/tiio_mov_proxy.h
@@ -3,7 +3,7 @@
 #ifndef TIIO_MOV_PROXY_H
 #define TIIO_MOV_PROXY_H
 
-#if defined(x64) || defined(__LP64__) || defined(LINUX)
+#if defined(x64) || defined(__LP64__) || defined(LINUX) || (defined(_WIN32) && defined(__GNUC__))
 
 // Qt includes
 #include <QString>
diff --git a/toonz/sources/image/tiio.cpp b/toonz/sources/image/tiio.cpp
index dfbd74d..4433ba5 100644
--- a/toonz/sources/image/tiio.cpp
+++ b/toonz/sources/image/tiio.cpp
@@ -20,7 +20,7 @@
 // Platform-specific includes
 #if defined(_WIN32)
 
-#ifndef x64
+#if !defined(x64) && !defined(__GNUC__)
 
 #define list QuickTime_list
 #define map QuickTime_map
@@ -169,7 +169,7 @@ void initImageIo(bool lightVersion) {
                                new Tiio::SpriteWriterProperties());
 
 // ffmpeg
-#if !defined(_WIN32) || defined(x64)
+#if !defined(_WIN32) || defined(x64) || (defined(_WIN32) && defined(__GNUC__))
   if (Ffmpeg::checkFfmpeg()) {
     bool ffprobe = Ffmpeg::checkFfprobe();
     if (Ffmpeg::checkFormat("webm")) {
diff --git a/toonz/sources/include/movsettings.h b/toonz/sources/include/movsettings.h
index 591d538..a152d18 100644
--- a/toonz/sources/include/movsettings.h
+++ b/toonz/sources/include/movsettings.h
@@ -13,7 +13,7 @@
 #define DVVAR DV_IMPORT_VAR
 #endif
 
-#if !(defined(x64) || defined(__LP64__) || defined(LINUX))
+#if !defined(x64) && !defined(__LP64__) && !defined(LINUX) && !(defined(__GNUC__) && defined(_WIN32))
 
 #ifdef _WIN32
 
diff --git a/toonz/sources/tcomposer/tcomposer.cpp b/toonz/sources/tcomposer/tcomposer.cpp
index e3b1d39..08b146b 100644
--- a/toonz/sources/tcomposer/tcomposer.cpp
+++ b/toonz/sources/tcomposer/tcomposer.cpp
@@ -74,6 +74,14 @@
 #include <QWaitCondition>
 #include <QMessageBox>
 
+
+#ifdef _WIN32
+#ifndef x64
+#include <float.h>
+#endif
+#endif
+
+
 //==================================================================================
 
 using namespace std;
diff --git a/toonz/sources/toonz/main.cpp b/toonz/sources/toonz/main.cpp
index 0b1a787..27b1088 100644
--- a/toonz/sources/toonz/main.cpp
+++ b/toonz/sources/toonz/main.cpp
@@ -85,6 +85,9 @@
 #include <QHash>
 
 #ifdef _WIN32
+#ifndef x64
+#include <float.h>
+#endif
 #include <QtPlatformHeaders/QWindowsWindowFunctions>
 #endif