diff --git a/toonz/sources/CMakeLists.txt b/toonz/sources/CMakeLists.txt
index 56ecdc7..0d9c5e5 100644
--- a/toonz/sources/CMakeLists.txt
+++ b/toonz/sources/CMakeLists.txt
@@ -196,6 +196,11 @@ elseif(BUILD_ENV_UNIXLIKE)
     endif()
     if(CMAKE_SYSTEM_NAME MATCHES "Linux")
         add_definitions(-DLINUX)
+    elseif(CMAKE_SYSTEM_NAME MATCHES "^.*BSD$|DragonFly")
+        set(BUILD_TARGET_BSD ON)
+        add_definitions(-D_BSD_SOURCE -DFREEBSD)
+        include_directories("/usr/local/include/")
+        message(STATUS "Configuring for BSD system")
     elseif(NOT BUILD_TARGET_WIN)
         message(WARNING "Support for generic Unix (Not Apple or Linux) isn't yet working!")
     endif()
@@ -421,7 +426,9 @@ elseif(BUILD_ENV_UNIXLIKE)
     endif()
     find_library(Z_LIB z)
 
-    find_package(TIFF REQUIRED)
+    if(NOT BUILD_TARGET_BSD)
+        find_package(TIFF REQUIRED)
+    endif()
     find_package(PNG REQUIRED)
     set(PNG_LIB ${PNG_LIBRARY})
     message("******* libpng:" ${PNG_LIB})
diff --git a/toonz/sources/common/tapptools/tenv.cpp b/toonz/sources/common/tapptools/tenv.cpp
index 1777ec5..ff22999 100644
--- a/toonz/sources/common/tapptools/tenv.cpp
+++ b/toonz/sources/common/tapptools/tenv.cpp
@@ -507,7 +507,7 @@ void TEnv::setApplicationFileName(std::string appFileName) {
 #ifdef MACOSX
   if (fp.getWideName().find(L".app"))
     for (int i = 0; i < 3; i++) fp = fp.getParentDir();
-#elif LINUX
+#elif defined(LINUX) || defined(FREEBSD)
   if (fp.getWideName().find(L".appimage"))
     for (int i = 0; i < 2; i++) fp = fp.getParentDir();
 #endif
diff --git a/toonz/sources/common/tgl/tgl.cpp b/toonz/sources/common/tgl/tgl.cpp
index c4bcd70..3208b1e 100644
--- a/toonz/sources/common/tgl/tgl.cpp
+++ b/toonz/sources/common/tgl/tgl.cpp
@@ -12,14 +12,14 @@
 #ifdef _WIN32
 #include <cstdlib>
 #include <GL/glut.h>
-#elif defined(LINUX)
+#elif defined(LINUX) || defined(FREEBSD)
 #include <GL/glut.h>
 #else
 #include <GLUT/glut.h>
 #endif
 #endif
 
-#if defined(MACOSX) || defined(LINUX)
+#if defined(MACOSX) || defined(LINUX) || defined(FREEBSD)
 #include <QGLContext>
 #endif
 
@@ -617,7 +617,7 @@ void tglMakeCurrent(TGlContext context) {
 
 void tglDoneCurrent(TGlContext) { wglMakeCurrent(NULL, NULL); }
 
-#elif defined(LINUX) || defined(__sgi) || defined(MACOSX)
+#elif defined(LINUX) || defined(FREEBSD) || defined(__sgi) || defined(MACOSX)
 
 TGlContext tglGetCurrentContext() {
   return reinterpret_cast<TGlContext>(
diff --git a/toonz/sources/common/tiio/bmp/filebmp.h b/toonz/sources/common/tiio/bmp/filebmp.h
index d6911ff..75be7ad 100644
--- a/toonz/sources/common/tiio/bmp/filebmp.h
+++ b/toonz/sources/common/tiio/bmp/filebmp.h
@@ -11,7 +11,7 @@ extern "C" {
 typedef struct {unsigned char b,g,r,m;}  LPIXEL;
 #elif defined(__sgi)
 typedef struct { unsigned char  m,b,g,r; } LPIXEL;
-#elif defined (LINUX)
+#elif defined(LINUX) || defined(FREEBSD)
 typedef struct { unsigned char  r,g,b,m; } LPIXEL;
 #else
 #error	Not yet implemented
diff --git a/toonz/sources/common/tiio/compatibility/tfile_io.c b/toonz/sources/common/tiio/compatibility/tfile_io.c
index 8fabd3b..83c3ac1 100644
--- a/toonz/sources/common/tiio/compatibility/tfile_io.c
+++ b/toonz/sources/common/tiio/compatibility/tfile_io.c
@@ -58,7 +58,7 @@ char *convertWCHAR2CHAR(const wchar_t *wc) {
 }
 #endif
 /*-----------------------------------*/
-#if defined(MACOSX) || defined(LINUX)
+#if defined(MACOSX) || defined(LINUX) || defined(FREEBSD)
 
 FILE *_wfopen(const wchar_t *fname, const wchar_t *mode) {
   char *cfname = convertWCHAR2CHAR(fname);
diff --git a/toonz/sources/common/tiio/compatibility/tfile_io.h b/toonz/sources/common/tiio/compatibility/tfile_io.h
index 93233d9..f85b022 100644
--- a/toonz/sources/common/tiio/compatibility/tfile_io.h
+++ b/toonz/sources/common/tiio/compatibility/tfile_io.h
@@ -9,13 +9,13 @@ extern "C" {
 
 #include <stdio.h>
 
-#if defined(MACOSX) || defined(LINUX)
+#if defined(MACOSX) || defined(LINUX) || defined(FREEBSD)
 #include <stddef.h>
 #endif
 
 char *convertWCHAR2CHAR(const wchar_t *fname);
 
-#if defined(MACOSX) || defined(LINUX)
+#if defined(MACOSX) || defined(LINUX) || defined(FREEBSD)
 
 #include <sys/types.h>
 #include <sys/stat.h>
diff --git a/toonz/sources/common/tiio/movsettings.cpp b/toonz/sources/common/tiio/movsettings.cpp
index 98952d4..07d43d3 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) && !(defined(__GNUC__) && defined(_WIN32))
+#if !defined(x64) && !defined(__LP64__) && !(defined(LINUX) || defined(FREEBSD)) && !(defined(__GNUC__) && defined(_WIN32))
 
 //*******************************************************************************
 //    32-bit version
diff --git a/toonz/sources/common/timage_io/timage_io.cpp b/toonz/sources/common/timage_io/timage_io.cpp
index 837fc56..11eb5d0 100644
--- a/toonz/sources/common/timage_io/timage_io.cpp
+++ b/toonz/sources/common/timage_io/timage_io.cpp
@@ -24,7 +24,7 @@
 #ifdef _WIN32
 #include <io.h>
 #endif
-#ifdef LINUX
+#if defined(LINUX) || defined(FREEBSD)
 #include <unistd.h>
 #endif
 
diff --git a/toonz/sources/common/tipc/tipc.cpp b/toonz/sources/common/tipc/tipc.cpp
index bc9cf1d..bf2703a 100644
--- a/toonz/sources/common/tipc/tipc.cpp
+++ b/toonz/sources/common/tipc/tipc.cpp
@@ -18,7 +18,7 @@
 #elif defined(MACOSX)
 #include <sys/sysctl.h>
 #include <unistd.h>
-#elif defined(LINUX)
+#elif defined(LINUX) || defined(FREEBSD)
 #include <sys/time.h>
 #include <unistd.h>
 #endif
diff --git a/toonz/sources/common/trasterimage/tcachedlevel.cpp b/toonz/sources/common/trasterimage/tcachedlevel.cpp
index c05bb3a..0e28ead 100644
--- a/toonz/sources/common/trasterimage/tcachedlevel.cpp
+++ b/toonz/sources/common/trasterimage/tcachedlevel.cpp
@@ -11,7 +11,7 @@
 
 #include "tconvert.h"
 
-#ifdef LINUX
+#if defined(LINUX) || defined(FREEBSD)
 #include "texception.h"
 //#include "tsystem.h"
 #include <unistd.h>
diff --git a/toonz/sources/common/trop/tresample.cpp b/toonz/sources/common/trop/tresample.cpp
index d6b588d..e7be26f 100644
--- a/toonz/sources/common/trop/tresample.cpp
+++ b/toonz/sources/common/trop/tresample.cpp
@@ -4597,7 +4597,7 @@ void rop_resample_rgbm_2(TRasterPT<T> rout, const TRasterCM32P &rin,
     }
   }
 
-#if defined(USE_SSE2) && defined(_MSC_VER)
+#if defined(USE_SSE2)
   TRaster32P rout32 = rout;
   if ((TSystem::getCPUExtensions() & TSystem::CpuSupportsSse2) && rout32)
     resample_main_cm32_rgbm_SSE2<TPixel32>(
diff --git a/toonz/sources/common/tstream/tstream.cpp b/toonz/sources/common/tstream/tstream.cpp
index 6311924..f6a3cc5 100644
--- a/toonz/sources/common/tstream/tstream.cpp
+++ b/toonz/sources/common/tstream/tstream.cpp
@@ -26,7 +26,7 @@ string escape(string v) {
   for (;;) {
 // Removing escaping of apostrophe from Windows and OSX as it's not needed and
 // causes problems
-#ifdef LINUX
+#if defined(LINUX) || defined(FREEBSD)
     i = v.find_first_of("\\\'\"", i);
 #else
     i = v.find_first_of("\\\"", i);
diff --git a/toonz/sources/common/tsystem/tpluginmanager.cpp b/toonz/sources/common/tsystem/tpluginmanager.cpp
index 905c8b7..a82fce8 100644
--- a/toonz/sources/common/tsystem/tpluginmanager.cpp
+++ b/toonz/sources/common/tsystem/tpluginmanager.cpp
@@ -15,10 +15,11 @@
 #include <sys/param.h>
 #include <unistd.h>
 #include <sys/types.h>
-#include <sys/timeb.h>  // for ftime
+#ifndef FREEBSD
+#include <dirent.h>
+#endif
 #include <stdio.h>
 #include <unistd.h>
-#include <dirent.h>
 #include <sys/dir.h>
 #include <sys/param.h>  // for getfsstat
 #ifdef MACOSX
@@ -94,7 +95,7 @@ void TPluginManager::unloadPlugins() {
   for (PluginTable::iterator it = m_pluginTable.begin();
        it != m_pluginTable.end(); ++it) {
     Plugin::Handle handle = (*it)->getHandle();
-#ifndef LINUX
+#if !(defined(LINUX) || defined(FREEBSD))
 #ifdef _WIN32
     FreeLibrary(handle);
 #else
@@ -171,7 +172,7 @@ void TPluginManager::loadPlugin(const TFilePath &fp) {
 void TPluginManager::loadPlugins(const TFilePath &dir) {
 #if defined(_WIN32)
   const std::string extension = "dll";
-#elif defined(LINUX) || defined(__sgi)
+#elif defined(LINUX) || defined(FREEBSD) || defined(__sgi)
   const std::string extension = "so";
 #elif defined(MACOSX)
   const std::string extension = "dylib";
diff --git a/toonz/sources/common/tsystem/tsystempd.cpp b/toonz/sources/common/tsystem/tsystempd.cpp
index 37e986c..585fe74 100644
--- a/toonz/sources/common/tsystem/tsystempd.cpp
+++ b/toonz/sources/common/tsystem/tsystempd.cpp
@@ -12,7 +12,6 @@
 #include "tconvert.h"
 
 #include <time.h>
-#include <sys/timeb.h>
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <errno.h>
@@ -66,6 +65,27 @@
 #include <QUrl>
 #endif
 
+#ifdef FREEBSD
+#define PLATFORM FREEBSD
+#include <sys/param.h>
+#include <sys/sched.h>
+#include <sys/sysctl.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/proc.h>
+#include <sys/vmmeter.h>
+#include <vm/vm_param.h>
+#include <grp.h>
+#include <utime.h>
+#include <stdio.h>
+#include <dirent.h>
+#include <sys/mount.h>
+#include <pwd.h>
+#include <dlfcn.h>
+#define pagetok(__nb) ((__nb) * (getpagesize()))
+#endif
+
+
 #if defined(MACOSX)
 #define PLATFORM MACOSX
 #include <grp.h>
@@ -73,7 +93,6 @@
 #include <sys/param.h>
 #include <unistd.h>
 #include <sys/types.h>
-#include <sys/timeb.h>  // for ftime
 #include <stdio.h>
 #include <unistd.h>
 #include <dirent.h>
@@ -192,6 +211,11 @@ bool TSystem::memoryShortage() {
   // to be done...
   return false;
 
+#elif defined(FREEBSD)
+
+  // to be done...
+  return false;
+
 #else
 
   @ @ @ERROR : PLATFORM NOT SUPPORTED
@@ -254,6 +278,31 @@ TINT64 TSystem::getFreeMemorySize(bool onlyPhisicalMemory) {
   }
   free(sysInfo);
 
+#elif defined(FREEBSD)
+
+  TINT64 ret = 0;
+  size_t size;
+#ifdef __OpenBSD__
+  int mib[] = {CTL_VM, VM_UVMEXP};
+  struct uvmexp  uvmexp;
+#else
+  int mib[] = {CTL_VM, VM_TOTAL};
+  struct vmtotal vmtotal;
+#endif
+
+#ifdef __OpenBSD__
+  size = sizeof(uvmexp);
+  if (sysctl(mib, 2, &uvmexp, &size, NULL, 0) < 0)
+    return (ret);
+  ret = pagetok((guint64)uvmexp.free);
+#else
+  size = sizeof(vmtotal);
+  if (sysctl(mib, 2, &vmtotal, &size, NULL, 0) < 0)
+    return (ret);
+  ret = pagetok(vmtotal.t_free);
+#endif
+  return ret;
+
 #elif defined(MACOSX)
 
   // to be done...
@@ -385,6 +434,32 @@ TINT64 TSystem::getMemorySize(bool onlyPhisicalMemory) {
   free(sysInfo);
   return ret;
 
+#elif defined(FREEBSD)
+
+  TINT64 ret = 0;
+  size_t size;
+#ifdef __OpenBSD__
+  int mib[] = {CTL_VM, VM_UVMEXP};
+  struct uvmexp  uvmexp;
+#else
+  int mib[] = {CTL_VM, VM_TOTAL};
+  struct vmtotal vmtotal;
+#endif
+
+#ifdef __OpenBSD__
+  size = sizeof(uvmexp);
+  if (sysctl(mib, 2, &uvmexp, &size, NULL, 0) < 0)
+    return (ret);
+  ret = pagetok((guint64)uvmexp.npages);
+#else
+  size = sizeof(vmtotal);
+  if (sysctl(mib, 2, &vmtotal, &size, NULL, 0) < 0)
+    return (ret);
+  /* cheat : rm = tot used, add free to get total */
+  ret = pagetok(vmtotal.t_rm + vmtotal.t_free);
+#endif
+  return ret;
+
 #elif defined(MACOSX)
 
   // to be done...
diff --git a/toonz/sources/common/ttest/ttest.cpp b/toonz/sources/common/ttest/ttest.cpp
index 8e6f53d..fef6c02 100644
--- a/toonz/sources/common/ttest/ttest.cpp
+++ b/toonz/sources/common/ttest/ttest.cpp
@@ -16,7 +16,7 @@
 #include <set>
 #include <sstream>
 
-#if defined(LINUX)
+#if defined(LINUX) || defined(FREEBSD)
 #include <typeinfo>
 #endif
 
diff --git a/toonz/sources/common/tvectorimage/tvectorimage.cpp b/toonz/sources/common/tvectorimage/tvectorimage.cpp
index 1bd786b..5bd6df6 100644
--- a/toonz/sources/common/tvectorimage/tvectorimage.cpp
+++ b/toonz/sources/common/tvectorimage/tvectorimage.cpp
@@ -617,7 +617,7 @@ bool TVectorImage::getNearestStroke(const TPointD &p, double &outW,
 
 //-----------------------------------------------------------------------------
 
-#if defined(LINUX) || defined(MACOSX)
+#if defined(LINUX) || defined(FREEBSD) || defined(MACOSX)
 void TVectorImage::render(const TVectorRenderData &rd, TRaster32P &ras) {
   // hardRenderVectorImage(rd,ras,this);
 }
diff --git a/toonz/sources/common/tvectorrenderer.cpp b/toonz/sources/common/tvectorrenderer.cpp
index 8ad85d6..0b4b1a3 100644
--- a/toonz/sources/common/tvectorrenderer.cpp
+++ b/toonz/sources/common/tvectorrenderer.cpp
@@ -22,7 +22,7 @@
 #include <stdlib.h>
 #endif
 
-#if defined(LINUX) || defined(__sgi)
+#if defined(LINUX) || defined(FREEBSD) || defined(__sgi)
 #include <GL/glx.h>
 #include <X11/Xlib.h>
 #include <X11/Xutil.h>
@@ -276,7 +276,7 @@ void hardRenderVectorImage(const TVectorRenderData &rd, TRaster32P &ras,
 }
 
 // end of WIN32
-#elif defined(__sgi) || defined(LINUX)
+#elif defined(__sgi) || defined(LINUX) || defined(FREEBSD)
 
 //=============================================================================
 
@@ -431,7 +431,7 @@ void hardRenderVectorImage(const TVectorRenderData &rd, TRaster32P &ras,
   glReadPixels(0, 0, ras->getLx(), ras->getLy(), GL_ABGR_EXT, GL_UNSIGNED_BYTE,
                ras->getRawData());
 
-#elif defined(LINUX)
+#elif defined(LINUX) || defined(FREEBSD)
 
   glReadPixels(0, 0, ras->getLx(), ras->getLy(), GL_RGBA, GL_UNSIGNED_BYTE,
                ras->getRawData());
diff --git a/toonz/sources/common/tvrender/qtofflinegl.cpp b/toonz/sources/common/tvrender/qtofflinegl.cpp
index b1561a8..5053c8a 100644
--- a/toonz/sources/common/tvrender/qtofflinegl.cpp
+++ b/toonz/sources/common/tvrender/qtofflinegl.cpp
@@ -153,7 +153,7 @@ void QtOfflineGL::createContext(TDimension rasterSize,
   fmt.setPlane(0);
   fmt.setDirectRendering(false);
 #endif
-#elif defined(LINUX)
+#elif defined(LINUX) || defined(FREEBSD)
   fmt = QGLFormat::defaultFormat();
   // printf("GL Version: %s\n",glGetString(GL_VERSION));
   fmt.setVersion(2, 1); /* XXX? */
@@ -299,7 +299,7 @@ SPECIFICHE  MAC = depth_size 24, stencil_size 8, alpha_size 1
   fmt.setStencil(true);
   fmt.setAccum(false);
   fmt.setPlane(0);
-#elif defined(LINUX)
+#elif defined(LINUX) || defined(FREEBSD)
   fmt.setAlphaBufferSize(1);
   fmt.setAlpha(false);
   fmt.setRgba(true);
diff --git a/toonz/sources/common/tvrender/tofflinegl.cpp b/toonz/sources/common/tvrender/tofflinegl.cpp
index 8783c0a..3e89013 100644
--- a/toonz/sources/common/tvrender/tofflinegl.cpp
+++ b/toonz/sources/common/tvrender/tofflinegl.cpp
@@ -11,7 +11,7 @@
 #include "trop.h"
 
 // Platform-specific includes
-#if defined(LINUX)
+#if defined(LINUX) || defined(FREEBSD)
 
 #include "qtofflinegl.h"
 #include <X11/Xlib.h>
@@ -304,10 +304,10 @@ static std::shared_ptr<TOfflineGL::Imp> defaultOfflineGLGenerator(
 }
 
 //=============================================================================
-// XImplementation : implementazione offlineGL  Server X (MACOSX & LINUX)
+// XImplementation : implementazione offlineGL  Server X (MACOSX & LINUX & BSD)
 //-----------------------------------------------------------------------------
 
-#elif defined(LINUX)
+#elif defined(LINUX) || defined(FREEBSD)
 namespace {
 // The XScopedLock stuff doesn't seem finished,
 // why not just do the same as with win32 and use a Qt lock??
@@ -540,7 +540,7 @@ public:
 //--------------------------------------------------
 
 TOfflineGL::TOfflineGL(TDimension dim, const TOfflineGL *shared) : m_imp(0) {
-#if defined(LINUX)
+#if defined(LINUX) || defined(FREEBSD)
   QMutexLocker locker(&linuxImpMutex);
 #endif
 
@@ -558,7 +558,7 @@ TOfflineGL::TOfflineGL(TDimension dim, const TOfflineGL *shared) : m_imp(0) {
 //-----------------------------------------------------------------------------
 
 TOfflineGL::TOfflineGL(const TRaster32P &raster, const TOfflineGL *shared) {
-#if defined(LINUX)
+#if defined(LINUX) || defined(FREEBSD)
   QMutexLocker locker(&linuxImpMutex);
 #endif
 
diff --git a/toonz/sources/common/tvrender/ttessellator.cpp b/toonz/sources/common/tvrender/ttessellator.cpp
index ca049d4..a6ecdf8 100644
--- a/toonz/sources/common/tvrender/ttessellator.cpp
+++ b/toonz/sources/common/tvrender/ttessellator.cpp
@@ -16,7 +16,7 @@
 #define CALLBACK
 #endif
 // To avoid linking problems with HP ZX2000
-#ifdef LINUX
+#if defined(LINUX) || defined(FREEBSD)
 #ifdef GLU_VERSION_1_2
 #undef GLU_VERSION_1_2
 #endif
@@ -94,7 +94,7 @@ static void CALLBACK myCombine(GLdouble coords[3], GLdouble *d[4], GLfloat w[4],
 typedef GLvoid(CALLBACK *GluCallback)(void);
 #endif
 
-#if defined(MACOSX) || defined(LINUX)
+#if defined(MACOSX) || defined(LINUX) || defined(FREEBSD)
 
 typedef GLvoid (*GluCallback)();
 
diff --git a/toonz/sources/common/twain/twain.h b/toonz/sources/common/twain/twain.h
index 1bfe9d5..2788bf0 100644
--- a/toonz/sources/common/twain/twain.h
+++ b/toonz/sources/common/twain/twain.h
@@ -101,7 +101,7 @@ TWPT_BGR,
  * Platform Dependent Definitions and Typedefs                              *
  ****************************************************************************/
 
-#ifdef LINUX
+#if defined(LINUX) || defined(FREEBSD)
 #include <wchar.h>
 #endif
 
diff --git a/toonz/sources/image/3gp/tiio_3gp_proxy.cpp b/toonz/sources/image/3gp/tiio_3gp_proxy.cpp
index 4fba3d8..e9dcc57 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) || (defined(_WIN32) && defined(__GNUC__))
+#if defined(x64) || defined(__LP64__) || defined(LINUX) || defined(FREEBSD) || (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 744769e..d777839 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) || (defined(_WIN32) && defined(__GNUC__))
+#if defined(x64) || defined(__LP64__) || defined(LINUX) || defined(FREEBSD) || (defined(_WIN32) && defined(__GNUC__))
 
 // Qt includes
 #include <QString>
diff --git a/toonz/sources/image/CMakeLists.txt b/toonz/sources/image/CMakeLists.txt
index 00d0a17..dc8c600 100644
--- a/toonz/sources/image/CMakeLists.txt
+++ b/toonz/sources/image/CMakeLists.txt
@@ -1,6 +1,5 @@
 set(HEADERS
     sgi/tiio_sgi.h
-    tif/tiio_tif.h
     pli/pli_io.h
     pli/tiio_pli.h
     tga/tiio_tga.h
@@ -13,9 +12,6 @@ set(HEADERS
     png/tiio_png.h
     psd/tiio_psd.h
     svg/tiio_svg.h
-    tzp/tiio_plt.h
-    tzp/tiio_tzp.h
-    tzp/toonztags.h
     tzl/tiio_tzl.h
     ../include/tnzimage.h
     mov/tiio_mov_proxy.h
@@ -31,7 +27,6 @@ set(HEADERS
 set(SOURCES
     tiio.cpp
     sgi/filesgi.cpp
-    tif/tiio_tif.cpp
     pli/pli_io.cpp
     pli/tags.cpp
     pli/tiio_pli.cpp
@@ -45,9 +40,6 @@ set(SOURCES
     png/tiio_png.cpp
     psd/tiio_psd.cpp
     svg/tiio_svg.cpp
-    tzp/tiio_plt.cpp
-    tzp/tiio_tzp.cpp
-    tzp/avl.c
     tzl/tiio_tzl.cpp
     mov/tiio_mov_proxy.cpp
     3gp/tiio_3gp_proxy.cpp
@@ -59,6 +51,25 @@ set(SOURCES
     mesh/tiio_mesh.cpp
 )
 
+
+# Can't build this on FreeBSD: libtiff requires internal API access.
+# Probably some one get luck to fix this.
+if(NOT BUILD_TARGET_BSD)
+    set(HEADERS ${HEADERS}
+        tif/tiio_tif.h
+        tzp/tiio_plt.h
+        tzp/tiio_tzp.h
+        tzp/toonztags.h
+    )
+    set(SOURCES ${SOURCES}
+        tif/tiio_tif.cpp
+        tzp/tiio_plt.cpp
+        tzp/tiio_tzp.cpp
+        tzp/avl.c
+    )
+endif()
+
+
 if(BUILD_TARGET_WIN)
     set(HEADERS ${HEADERS}
         avi/tiio_avi.h
@@ -110,9 +121,15 @@ message("Bin: " ${CMAKE_CURRENT_BINARY_DIR})
 include_directories(
     SYSTEM
     ${TIFF_INCLUDE_DIR}
-    ${SDKROOT}/LibJPEG/jpeg-9
 )
 
+if(NOT BUILD_TARGET_BSD)
+    include_directories(
+        ${SDKROOT}/LibJPEG/jpeg-9
+    )
+endif()
+
+
 if(BUILD_ENV_MSVC)
     include_directories(
         SYSTEM
diff --git a/toonz/sources/image/bmp/filebmp.h b/toonz/sources/image/bmp/filebmp.h
index 7d5785c..2d901d6 100644
--- a/toonz/sources/image/bmp/filebmp.h
+++ b/toonz/sources/image/bmp/filebmp.h
@@ -11,7 +11,7 @@ extern "C" {
 typedef struct {unsigned char b,g,r,m;}  LPIXEL;
 #elif defined(__sgi)
 typedef struct { unsigned char  m,b,g,r; } LPIXEL;
-#elif defined (LINUX)
+#elif defined(LINUX) || defined(FREEBSD)
 typedef struct { unsigned char  r,g,b,m; } LPIXEL;
 #else
 #error	Not yet implemented
diff --git a/toonz/sources/image/compatibility/tfile_io.c b/toonz/sources/image/compatibility/tfile_io.c
index 8fabd3b..83c3ac1 100644
--- a/toonz/sources/image/compatibility/tfile_io.c
+++ b/toonz/sources/image/compatibility/tfile_io.c
@@ -58,7 +58,7 @@ char *convertWCHAR2CHAR(const wchar_t *wc) {
 }
 #endif
 /*-----------------------------------*/
-#if defined(MACOSX) || defined(LINUX)
+#if defined(MACOSX) || defined(LINUX) || defined(FREEBSD)
 
 FILE *_wfopen(const wchar_t *fname, const wchar_t *mode) {
   char *cfname = convertWCHAR2CHAR(fname);
diff --git a/toonz/sources/image/compatibility/tfile_io.h b/toonz/sources/image/compatibility/tfile_io.h
index d7a3fdd..fa8a9f7 100644
--- a/toonz/sources/image/compatibility/tfile_io.h
+++ b/toonz/sources/image/compatibility/tfile_io.h
@@ -13,13 +13,13 @@ extern "C" {
 #include <stddef.h>
 #endif
 
-#ifdef LINUX
+#if defined(LINUX) || defined(FREEBSD)
 #include <wchar.h>
 #endif
 
 char *convertWCHAR2CHAR(const wchar_t *fname);
 
-#if defined(MACOSX) || defined(LINUX)
+#if defined(MACOSX) || defined(LINUX) || defined(FREEBSD)
 
 #include <sys/types.h>
 #include <sys/stat.h>
diff --git a/toonz/sources/image/compatibility/tnz4.h b/toonz/sources/image/compatibility/tnz4.h
index 9488ebe..e903fad 100644
--- a/toonz/sources/image/compatibility/tnz4.h
+++ b/toonz/sources/image/compatibility/tnz4.h
@@ -34,7 +34,7 @@ TNZ_LITTLE_ENDIAN undefined !!
   unsigned char b, g, r, m;
 #elif defined(__sgi)
   unsigned char m, b, g, r;
-#elif defined(LINUX)
+#elif defined(LINUX) || defined(FREEBSD)
   unsigned char r, g, b, m;
 #elif defined(MACOSX)
   unsigned char m, r, g, b;
@@ -48,7 +48,7 @@ typedef struct SPIXEL {
   unsigned short b, g, r, m;
 #elif defined(__sgi)
   unsigned short m, b, g, r;
-#elif defined(LINUX)
+#elif defined(LINUX) || defined(FREEBSD)
   unsigned short r, g, b, m;
 #elif defined(MACOSX)
   unsigned char m, r, g, b;
diff --git a/toonz/sources/image/mov/tiio_mov_proxy.cpp b/toonz/sources/image/mov/tiio_mov_proxy.cpp
index 816171d..b274311 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) || (defined(_WIN32) && defined(__GNUC__))
+#if defined(x64) || defined(__LP64__) || defined(LINUX) || defined(FREEBSD) || (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 68d0c88..fbd8213 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) || (defined(_WIN32) && defined(__GNUC__))
+#if defined(x64) || defined(__LP64__) || defined(LINUX) || defined(FREEBSD) || (defined(_WIN32) && defined(__GNUC__))
 
 // Qt includes
 #include <QString>
diff --git a/toonz/sources/image/pli/pli_io.cpp b/toonz/sources/image/pli/pli_io.cpp
index 8baa27e..e7b5f13 100644
--- a/toonz/sources/image/pli/pli_io.cpp
+++ b/toonz/sources/image/pli/pli_io.cpp
@@ -435,7 +435,7 @@ void ParsedPli::setMaxThickness(double maxThickness) {
 };
 
 /* indirect inclusion of <math.h> causes 'abs' to return double on Linux */
-#if defined(LINUX) || (defined(_WIN32) && defined(__GNUC__))
+#if defined(LINUX) || defined(FREEBSD) || (defined(_WIN32) && defined(__GNUC__))
 template <typename T>
 T abs_workaround(T a) {
   return (a > 0) ? a : -a;
@@ -473,7 +473,7 @@ static inline short complement2(USHORT val) {
   return (val & 0x8000) ? -(val & 0x7fff) : (val & 0x7fff);
 }
 
-#if defined(LINUX) || (defined(_WIN32) && defined(__GNUC__))
+#if defined(LINUX) || defined(FREEBSD) || (defined(_WIN32) && defined(__GNUC__))
 #undef abs
 #endif
 
diff --git a/toonz/sources/image/sgi/filesgi.cpp b/toonz/sources/image/sgi/filesgi.cpp
index 4621fe1..1a67279 100644
--- a/toonz/sources/image/sgi/filesgi.cpp
+++ b/toonz/sources/image/sgi/filesgi.cpp
@@ -11,7 +11,7 @@
 #include "tsystem.h"
 #include "tpixelgr.h"
 #include "../compatibility/tfile_io.h"
-#ifdef LINUX
+#if defined(LINUX) || defined(FREEBSD)
 //#define _XOPEN_SOURCE_EXTENDED
 #include <string.h>
 #endif
diff --git a/toonz/sources/image/tiio.cpp b/toonz/sources/image/tiio.cpp
index 4433ba5..671e0d9 100644
--- a/toonz/sources/image/tiio.cpp
+++ b/toonz/sources/image/tiio.cpp
@@ -53,7 +53,7 @@
 #include "./mov/tiio_movM.h"
 #include "./3gp/tiio_3gpM.h"
 
-#elif defined(LINUX)  // No more supported by the way...
+#elif defined(LINUX) || defined(FREEBSD)  // No more supported by the way...
 // #include "./mov/tiio_movL.h"
 #include "./mov/tiio_mov_proxy.h"
 #include "./3gp/tiio_3gp_proxy.h"
@@ -64,9 +64,13 @@
 #include "./sgi/tiio_sgi.h"
 #include "./tga/tiio_tga.h"
 #include "./png/tiio_png.h"
+/* Can't build this on FreeBSD: libtiff requires internal API access.
+ * Probably some one get luck to fix this. */
+#ifndef FREEBSD
 #include "./tif/tiio_tif.h"
 #include "./tzp/tiio_tzp.h"
 #include "./tzp/tiio_plt.h"
+#endif
 #include "./psd/tiio_psd.h"
 #include "./avi/tiio_avi.h"
 #include "./pli/tiio_pli.h"
@@ -102,6 +106,9 @@ void initImageIo(bool lightVersion) {
     TLevelReader::define("tlv", TLevelReaderTzl::create);
     TFileType::declare("tlv", TFileType::CMAPPED_LEVEL);
 
+/* Can't build this on FreeBSD: libtiff requires internal API access.
+ * Probably some one get luck to fix this. */
+#ifndef FREEBSD
     Tiio::defineReaderMaker("tzp", Tiio::makeTzpReader);
     Tiio::defineWriterMaker("tzp", Tiio::makeTzpWriter, false);
     TFileType::declare("tzp", TFileType::CMAPPED_IMAGE);
@@ -116,6 +123,7 @@ void initImageIo(bool lightVersion) {
     Tiio::defineReaderMaker("plt", Tiio::makePltReader);
     Tiio::defineWriterMaker("plt", Tiio::makePltWriter, false);
     TFileType::declare("plt", TFileType::RASTER_IMAGE);
+#endif
 
     Tiio::defineReaderMaker("nol", Tiio::makePngReader);
     Tiio::defineWriterMaker("nol", Tiio::makePngWriter, true);
@@ -143,6 +151,9 @@ void initImageIo(bool lightVersion) {
   TFileType::declare("tga", TFileType::RASTER_IMAGE);
   Tiio::defineWriterProperties("tga", new Tiio::TgaWriterProperties());
 
+/* Can't build this on FreeBSD: libtiff requires internal API access.
+ * Probably some one get luck to fix this. */
+#ifndef FREEBSD
   Tiio::defineReaderMaker("tif", Tiio::makeTifReader);
   Tiio::defineWriterMaker("tif", Tiio::makeTifWriter, true);
   TFileType::declare("tif", TFileType::RASTER_IMAGE);
@@ -152,6 +163,7 @@ void initImageIo(bool lightVersion) {
   Tiio::defineWriterMaker("tiff", Tiio::makeTifWriter, true);
   TFileType::declare("tiff", TFileType::RASTER_IMAGE);
   Tiio::defineWriterProperties("tiff", new Tiio::TifWriterProperties());
+#endif
 
   Tiio::defineReaderMaker("sgi", Tiio::makeSgiReader);
   Tiio::defineWriterMaker("sgi", Tiio::makeSgiWriter, true);
diff --git a/toonz/sources/include/movsettings.h b/toonz/sources/include/movsettings.h
index a152d18..9008f7d 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) && !(defined(__GNUC__) && defined(_WIN32))
+#if !defined(x64) && !defined(__LP64__) && !(defined(LINUX) || defined(FREEBSD)) && !(defined(__GNUC__) && defined(_WIN32))
 
 #ifdef _WIN32
 
diff --git a/toonz/sources/include/tcg/hpp/triangulate.hpp b/toonz/sources/include/tcg/hpp/triangulate.hpp
index e778824..3b5e5b3 100644
--- a/toonz/sources/include/tcg/hpp/triangulate.hpp
+++ b/toonz/sources/include/tcg/hpp/triangulate.hpp
@@ -14,7 +14,7 @@
 #include <GL/glu.h>
 #elif defined(MACOSX)
 #include <GLUT/glut.h>
-#elif defined(LINUX)
+#elif defined(LINUX) || defined(FREEBSD)
 #include <GL/glut.h>
 #include <cstring>
 #endif
diff --git a/toonz/sources/include/tgl.h b/toonz/sources/include/tgl.h
index 6708e5b..538b8f6 100644
--- a/toonz/sources/include/tgl.h
+++ b/toonz/sources/include/tgl.h
@@ -21,7 +21,7 @@
 #define GLUT_NO_WARNING_DISABLE
 #endif
 
-#ifdef LINUX
+#if defined(LINUX) || defined(FREEBSD)
 #include <GL/gl.h>
 #include <GL/glu.h>
 #include <GL/glut.h>
diff --git a/toonz/sources/include/tmachine.h b/toonz/sources/include/tmachine.h
index 21f07a6..b954c27 100644
--- a/toonz/sources/include/tmachine.h
+++ b/toonz/sources/include/tmachine.h
@@ -7,7 +7,7 @@
 #define TNZ_MACHINE_CHANNEL_ORDER_BGRM 1
 #elif defined(__sgi)
 #define TNZ_MACHINE_CHANNEL_ORDER_MBGR 1
-#elif defined(LINUX)
+#elif defined(LINUX) || defined(FREEBSD)
 #define TNZ_MACHINE_CHANNEL_ORDER_BGRM 1
 #elif defined(MACOSX)
 #define TNZ_MACHINE_CHANNEL_ORDER_MRGB 1
diff --git a/toonz/sources/include/tnztypes.h b/toonz/sources/include/tnztypes.h
index 58000dd..6aaaf84 100644
--- a/toonz/sources/include/tnztypes.h
+++ b/toonz/sources/include/tnztypes.h
@@ -18,7 +18,7 @@ typedef uint32_t TUINT32;
 typedef int64_t TINT64;
 typedef uint64_t TUINT64;
 
-#elif defined(__LP64__) && (!defined(LINUX))
+#elif defined(__LP64__) && !(defined(LINUX) || defined(FREEBSD))
 
 #define TINT32                                                                 \
   ;                                                                            \
@@ -34,7 +34,7 @@ typedef unsigned __int32_t TUINT32;
 typedef __int64_t TINT64;
 typedef unsigned __int64_t TUINT64;
 
-#elif defined(LINUX) || defined(_WIN32)
+#elif defined(LINUX) || defined(FREEBSD) || defined(_WIN32)
 #include <stdint.h>
 typedef int32_t TINT32;
 typedef uint32_t TUINT32;
diff --git a/toonz/sources/include/toonz4.6/machine.h b/toonz/sources/include/toonz4.6/machine.h
index e9bf6f6..176fa62 100644
--- a/toonz/sources/include/toonz4.6/machine.h
+++ b/toonz/sources/include/toonz4.6/machine.h
@@ -17,7 +17,7 @@
 #define TNZ_MACHINE_CHANNEL_ORDER_BGRM 1
 #elif defined(__sgi)
 #define TNZ_MACHINE_CHANNEL_ORDER_MBGR 1
-#elif defined(LINUX)
+#elif defined(LINUX) || defined(FREEBSD)
 #define TNZ_MACHINE_CHANNEL_ORDER_BGRM 1
 #elif defined(MACOSX)
 #define TNZ_MACHINE_CHANNEL_ORDER_MRGB 1
diff --git a/toonz/sources/include/tpixel.h b/toonz/sources/include/tpixel.h
index 5dd25b0..b3531cc 100644
--- a/toonz/sources/include/tpixel.h
+++ b/toonz/sources/include/tpixel.h
@@ -177,7 +177,7 @@ undefined machine order !!!!
   TPixelRGBM64(int rr, int gg, int bb, int mm = maxChannelValue)
       : r(rr), g(gg), b(bb), m(mm){};
 #else
-#if defined(LINUX) || defined(MACOSX)
+#if defined(LINUX) || defined(FREEBSD) || defined(MACOSX)
 
 #ifdef powerpc
 
diff --git a/toonz/sources/include/trop.h b/toonz/sources/include/trop.h
index 2985147..789632f 100644
--- a/toonz/sources/include/trop.h
+++ b/toonz/sources/include/trop.h
@@ -13,6 +13,9 @@
 #define DVVAR DV_IMPORT_VAR
 #endif
 
+/* FreeBSD defines atop() macro in standard includes. */
+#undef atop
+
 //===============================================================
 
 //  Forward declarations
diff --git a/toonz/sources/include/tvectorimage.h b/toonz/sources/include/tvectorimage.h
index cb4c1c0..8af541a 100644
--- a/toonz/sources/include/tvectorimage.h
+++ b/toonz/sources/include/tvectorimage.h
@@ -245,7 +245,7 @@ get the stroke nearest at point
 // Gmt. VA TOLTO IL PRIMA POSSIBILE.
 // E' una pessima cosa rendere platform dependent l'interfaccia pubblica di una
 // classe cosi' importante come la VectorImage
-#if defined(LINUX) || defined(MACOSX)
+#if defined(LINUX) || defined(FREEBSD) || defined(MACOSX)
   void render(const TVectorRenderData &rd, TRaster32P &ras);
 #endif
 
@@ -428,7 +428,7 @@ public:
 //-----------------------------------------------------------------------------
 
 // GMT: DA TOGLIERE. vedi sopra
-#ifdef LINUX
+#if defined(LINUX) || defined(FREEBSD)
 DVAPI void hardRenderVectorImage(const TVectorRenderData &rd, TRaster32P &r,
                                  const TVectorImageP &vimg);
 #endif
diff --git a/toonz/sources/stdfx/calligraphicfx.cpp b/toonz/sources/stdfx/calligraphicfx.cpp
index d4e1e3e..56dbe0e 100644
--- a/toonz/sources/stdfx/calligraphicfx.cpp
+++ b/toonz/sources/stdfx/calligraphicfx.cpp
@@ -15,7 +15,6 @@
 #include <stdlib.h>
 #include <time.h>
 #include <sys/types.h>
-#include <sys/timeb.h>
 #include <string.h>
 #include <math.h>
 
diff --git a/toonz/sources/stdfx/igs_resource_msg_from_err_unix.cpp b/toonz/sources/stdfx/igs_resource_msg_from_err_unix.cpp
index fd902bf..4a8c047 100644
--- a/toonz/sources/stdfx/igs_resource_msg_from_err_unix.cpp
+++ b/toonz/sources/stdfx/igs_resource_msg_from_err_unix.cpp
@@ -1,5 +1,5 @@
-#define _POSIX_C_SOURCE 200809L /* int strerror_r() */
-#undef _GNU_SOURCE
+#define _XOPEN_SOURCE 700 /* isascii() */
+#undef _GNU_SOURCE /* int strerror_r() on glibc */
 #include <cerrno>
 #include <cstring> /* memset */
 #include <vector>
diff --git a/toonz/sources/stdfx/offscreengl.h b/toonz/sources/stdfx/offscreengl.h
index 3a17605..300c7ba 100644
--- a/toonz/sources/stdfx/offscreengl.h
+++ b/toonz/sources/stdfx/offscreengl.h
@@ -2,7 +2,7 @@
 
 #ifndef OFFSCREENGL_H
 #define OFFSCREENGL_H
-#if defined(LINUX) || defined(MACOSX)
+#if defined(LINUX) || defined(FREEBSD) || defined(MACOSX)
 #include "tofflinegl.h"
 #endif
 
@@ -71,7 +71,7 @@ public:
           assert(ret == TRUE);
     */
 #else
-#if defined(LINUX) || defined(MACOSX)
+#if defined(LINUX) || defined(FREEBSD) || defined(MACOSX)
     m_offlineGL = new TOfflineGL(TDimension(width, height));
 #endif
 #endif
@@ -93,7 +93,7 @@ public:
     DeleteObject(m_offDIB);
     DeleteObject(m_offHdc);
 #else
-#if defined(LINUX) || defined(MACOSX)
+#if defined(LINUX) || defined(FREEBSD) || defined(MACOSX)
 
     delete m_offlineGL;
 #endif
@@ -127,7 +127,7 @@ public:
   HGLRC m_hglRC;
   BITMAPINFO m_info;
 #else
-#if defined(LINUX) || defined(MACOSX)
+#if defined(LINUX) || defined(FREEBSD) || defined(MACOSX)
   TOfflineGL *m_offlineGL;
 #endif
 #endif
diff --git a/toonz/sources/stdfx/pins.cpp b/toonz/sources/stdfx/pins.cpp
index 59206f0..dc3f3fd 100644
--- a/toonz/sources/stdfx/pins.cpp
+++ b/toonz/sources/stdfx/pins.cpp
@@ -141,7 +141,7 @@ void subCompute(TRasterFxPort &m_input, TTile &tile, double frame,
   //#ifdef _WIN32
   offScreenRendering.makeCurrent();
 //#else
-//#if defined(LINUX) || defined(MACOSX)
+//#if defined(LINUX) || defined(FREEBSD) || defined(MACOSX)
 // offScreenRendering.m_offlineGL->makeCurrent();
 //#endif
 #endif
diff --git a/toonz/sources/t32bitsrv/main.cpp b/toonz/sources/t32bitsrv/main.cpp
index d272ed4..806904f 100644
--- a/toonz/sources/t32bitsrv/main.cpp
+++ b/toonz/sources/t32bitsrv/main.cpp
@@ -1,6 +1,6 @@
 
 
-#if (!(defined(x64) || defined(__LP64__) || defined(LINUX)))
+#if (!(defined(x64) || defined(__LP64__) || defined(LINUX) || defined(FREEBSD)))
 
 // Toonz includes
 #include "tiio_std.h"
diff --git a/toonz/sources/t32bitsrv/t323gpmsg.cpp b/toonz/sources/t32bitsrv/t323gpmsg.cpp
index 5892ab1..84ead44 100644
--- a/toonz/sources/t32bitsrv/t323gpmsg.cpp
+++ b/toonz/sources/t32bitsrv/t323gpmsg.cpp
@@ -1,6 +1,6 @@
 
 
-#if (!(defined(x64) || defined(__LP64__) || defined(LINUX)))
+#if (!(defined(x64) || defined(__LP64__) || defined(LINUX) || defined(FREEBSD)))
 
 // Toonz stuff
 #include "tiio.h"
diff --git a/toonz/sources/t32bitsrv/t32movmsg.cpp b/toonz/sources/t32bitsrv/t32movmsg.cpp
index 6372526..9c8d49d 100644
--- a/toonz/sources/t32bitsrv/t32movmsg.cpp
+++ b/toonz/sources/t32bitsrv/t32movmsg.cpp
@@ -1,6 +1,6 @@
 
 
-#if (!(defined(x64) || defined(__LP64__) || defined(LINUX)))
+#if (!(defined(x64) || defined(__LP64__) || defined(LINUX) || defined(FREEBSD)))
 
 // Toonz stuff
 #include "tiio.h"
diff --git a/toonz/sources/tconverter/tconverter.cpp b/toonz/sources/tconverter/tconverter.cpp
index a133617..057d44a 100644
--- a/toonz/sources/tconverter/tconverter.cpp
+++ b/toonz/sources/tconverter/tconverter.cpp
@@ -29,7 +29,7 @@
 #include "tvectorrenderdata.h"
 #include "tofflinegl.h"
 
-#if defined(LINUX)
+#if defined(LINUX) || defined(FREEBSD)
 #include <QGuiApplication>
 #endif
 
@@ -359,7 +359,7 @@ void convert(const TFilePath &source, const TFilePath &dest,
 //------------------------------------------------------------------------
 
 int main(int argc, char *argv[]) {
-#if defined(LINUX)
+#if defined(LINUX) || defined(FREEBSD)
   QGuiApplication app(argc, argv);
 #endif
 
diff --git a/toonz/sources/toonz/sceneviewer.cpp b/toonz/sources/toonz/sceneviewer.cpp
index edfbd25..4bbe8a2 100644
--- a/toonz/sources/toonz/sceneviewer.cpp
+++ b/toonz/sources/toonz/sceneviewer.cpp
@@ -1,5 +1,5 @@
 
-#ifdef LINUX
+#if defined(LINUX) || defined(FREEBSD)
 #define GL_GLEXT_PROTOTYPES
 #endif
 
diff --git a/toonz/sources/toonz/sceneviewerevents.cpp b/toonz/sources/toonz/sceneviewerevents.cpp
index ce21cc7..cfb52b7 100644
--- a/toonz/sources/toonz/sceneviewerevents.cpp
+++ b/toonz/sources/toonz/sceneviewerevents.cpp
@@ -309,7 +309,7 @@ void SceneViewer::tabletEvent(QTabletEvent *e) {
       m_tabletEvent = false;
 #endif
 
-#ifdef LINUX
+#if defined(LINUX) || defined(FREEBSD)
     // for Linux, create context menu on right click here.
     // could possibly merge with OSX code above
     if (e->button() == Qt::RightButton) {
diff --git a/toonz/sources/toonzfarm/tfarm/tlog.cpp b/toonz/sources/toonzfarm/tfarm/tlog.cpp
index 7cc875e..36ffe55 100644
--- a/toonz/sources/toonzfarm/tfarm/tlog.cpp
+++ b/toonz/sources/toonzfarm/tfarm/tlog.cpp
@@ -18,7 +18,6 @@
 #else
 #include <syslog.h>
 #include <unistd.h>
-#include <sys/timeb.h>
 #endif
 
 #include "tthreadmessage.h"
diff --git a/toonz/sources/toonzfarm/tfarmcontroller/tfarmcontroller.cpp b/toonz/sources/toonzfarm/tfarmcontroller/tfarmcontroller.cpp
index f758638..d2ca501 100644
--- a/toonz/sources/toonzfarm/tfarmcontroller/tfarmcontroller.cpp
+++ b/toonz/sources/toonzfarm/tfarmcontroller/tfarmcontroller.cpp
@@ -29,7 +29,6 @@ using namespace std;
 #ifndef _WIN32
 #include <sys/param.h>
 #include <unistd.h>
-#include <sys/timeb.h>
 #endif
 
 int inline STRICMP(const QString &a, const QString &b) {
@@ -118,8 +117,12 @@ TFilePath getLocalRoot() {
                          ".app/Contents/Resources/configfarmroot.txt";
 #else
   // set path to something suitable for most linux (Unix?) systems
+#ifdef FREEBSD
+  std::string unixpath = "/usr/local/etc/" + tver.getAppName() + "/opentoonz.conf";
+#else
   std::string unixpath = "/etc/" + tver.getAppName() + "/opentoonz.conf";
 #endif
+#endif
   TFilePath name(unixpath);
   Tifstream is(name);
   if (is) {
diff --git a/toonz/sources/toonzfarm/tfarmserver/tfarmserver.cpp b/toonz/sources/toonzfarm/tfarmserver/tfarmserver.cpp
index 4acf98e..fc10bc6 100644
--- a/toonz/sources/toonzfarm/tfarmserver/tfarmserver.cpp
+++ b/toonz/sources/toonzfarm/tfarmserver/tfarmserver.cpp
@@ -29,7 +29,6 @@ using namespace TVER;
 #else
 #include <sys/param.h>
 #include <unistd.h>
-#include <sys/timeb.h>
 #endif
 
 //#define REDIRECT_OUPUT
@@ -116,8 +115,12 @@ TFilePath getLocalRoot() {
                          ".app/Contents/Resources/configfarmroot.txt";
 #else
   // set path to something suitable for most linux (Unix?) systems
+#ifdef FREEBSD
+  std::string unixpath = "/usr/local/etc/" + tver.getAppName() + "/opentoonz.conf";
+#else
   std::string unixpath = "/etc/" + tver.getAppName() + "/opentoonz.conf";
 #endif
+#endif
   TFilePath name(unixpath);
   Tifstream is(name);
   if (is) {
diff --git a/toonz/sources/toonzlib/sandor_fxs/calligraph.cpp b/toonz/sources/toonzlib/sandor_fxs/calligraph.cpp
index 49ecf6a..eda1ed4 100644
--- a/toonz/sources/toonzlib/sandor_fxs/calligraph.cpp
+++ b/toonz/sources/toonzlib/sandor_fxs/calligraph.cpp
@@ -12,7 +12,6 @@
 #include <stdlib.h>
 #include <time.h>
 #include <sys/types.h>
-#include <sys/timeb.h>
 #include <string.h>
 #include <math.h>
 
diff --git a/toonz/sources/toonzlib/sandor_fxs/patternmap.cpp b/toonz/sources/toonzlib/sandor_fxs/patternmap.cpp
index 60bc34d..335c769 100644
--- a/toonz/sources/toonzlib/sandor_fxs/patternmap.cpp
+++ b/toonz/sources/toonzlib/sandor_fxs/patternmap.cpp
@@ -9,7 +9,6 @@
 #include <stdlib.h>
 #include <time.h>
 #include <sys/types.h>
-#include <sys/timeb.h>
 #include <string.h>
 #include <math.h>
 
diff --git a/toonz/sources/toonzlib/studiopalette.cpp b/toonz/sources/toonzlib/studiopalette.cpp
index 5a9a959..b655f11 100644
--- a/toonz/sources/toonzlib/studiopalette.cpp
+++ b/toonz/sources/toonzlib/studiopalette.cpp
@@ -17,7 +17,6 @@
 #include <time.h>
 #include <stdio.h>
 #include <sys/types.h>
-#include <sys/timeb.h>
 #include <string.h>
 
 #include <QSettings>
diff --git a/toonz/sources/toonzlib/tlog.cpp b/toonz/sources/toonzlib/tlog.cpp
index bc6241b..0eb8ab3 100644
--- a/toonz/sources/toonzlib/tlog.cpp
+++ b/toonz/sources/toonzlib/tlog.cpp
@@ -19,7 +19,6 @@
 #else
 #include <syslog.h>
 #include <unistd.h>
-#include <sys/timeb.h>
 #endif
 
 #include "tthreadmessage.h"