diff --git a/toonz/sources/CMakeLists.txt b/toonz/sources/CMakeLists.txt
index e01cde8..9eb1149 100644
--- a/toonz/sources/CMakeLists.txt
+++ b/toonz/sources/CMakeLists.txt
@@ -188,8 +188,12 @@ elseif(BUILD_ENV_APPLE)
 elseif(BUILD_ENV_UNIXLIKE)
     # Needed for correct Qt detection
     cmake_minimum_required(VERSION 2.8.12)
+    set(PRELOAD_VARIABLE "LD_LIBRARY_PATH")
     if(CMAKE_SYSTEM_NAME MATCHES "Linux")
         add_definitions(-DLINUX)
+    elseif(CMAKE_SYSTEM_NAME MATCHES "Haiku")
+        add_definitions(-DHAIKU)
+        set(PRELOAD_VARIABLE "LIBRARY_PATH")
     elseif(CMAKE_SYSTEM_NAME MATCHES "^.*BSD$|DragonFly")
         set(BUILD_TARGET_BSD ON)
         add_definitions(-D_BSD_SOURCE -DFREEBSD)
@@ -472,6 +476,9 @@ elseif(BUILD_ENV_UNIXLIKE)
     find_package(LZO REQUIRED)
     message("LZO:" ${LZO_INCLUDE_DIR})
 
+    if(HAIKU)
+        find_library(EXECINFO_LIBRARY execinfo)
+    endif()
     find_library(PTHREAD_LIBRARY pthread)
 
     if(NOT BUILD_TARGET_WIN)
diff --git a/toonz/sources/common/tapptools/tenv.cpp b/toonz/sources/common/tapptools/tenv.cpp
index 173c349..8f83764 100644
--- a/toonz/sources/common/tapptools/tenv.cpp
+++ b/toonz/sources/common/tapptools/tenv.cpp
@@ -6,6 +6,7 @@
 
 #include <QDir>
 #include <QSettings>
+#include <QStandardPaths>
 
 #ifdef LEVO_MACOSX
 
@@ -79,6 +80,9 @@ public:
     settingsPath = QString::fromStdString(getApplicationFileName()) +
                    QString(".app") +
                    QString("/Contents/Resources/SystemVar.ini");
+#else
+#ifdef HAIKU
+    settingsPath = QStandardPaths::writableLocation(QStandardPaths::AppConfigLocation) + "/SystemVar.ini";
 #else /* Generic Unix */
     // TODO: use QStandardPaths::ConfigLocation when we drop Qt4
     settingsPath = QDir::homePath();
@@ -86,6 +90,7 @@ public:
     settingsPath.append(getApplicationName().c_str());
     settingsPath.append("/SystemVar.ini");
 #endif
+#endif
 
     QSettings settings(settingsPath, QSettings::IniFormat);
     QString qStr      = QString::fromStdString(varName);
diff --git a/toonz/sources/common/tgl/tgl.cpp b/toonz/sources/common/tgl/tgl.cpp
index 453c07a..88c6989 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) || defined(FREEBSD)
+#elif defined(LINUX) || defined(FREEBSD) || defined(HAIKU)
 #include <GL/glut.h>
 #else
 #include <GLUT/glut.h>
 #endif
 #endif
 
-#if defined(MACOSX) || defined(LINUX) || defined(FREEBSD)
+#if defined(MACOSX) || defined(LINUX) || defined(FREEBSD) || defined(HAIKU)
 #include <QGLContext>
 #endif
 
@@ -617,7 +617,7 @@ void tglMakeCurrent(TGlContext context) {
 
 void tglDoneCurrent(TGlContext) { wglMakeCurrent(NULL, NULL); }
 
-#elif defined(LINUX) || defined(FREEBSD) || defined(__sgi) || defined(MACOSX)
+#elif defined(LINUX) || defined(FREEBSD) || defined(__sgi) || defined(MACOSX) || defined(HAIKU)
 
 TGlContext tglGetCurrentContext() {
   return reinterpret_cast<TGlContext>(
diff --git a/toonz/sources/common/tiio/movsettings.cpp b/toonz/sources/common/tiio/movsettings.cpp
index dcb302c..4904050 100644
--- a/toonz/sources/common/tiio/movsettings.cpp
+++ b/toonz/sources/common/tiio/movsettings.cpp
@@ -8,7 +8,7 @@
 #include "tiio.h"
 
 #if !defined(x64) && !defined(__LP64__) &&                                     \
-    !(defined(LINUX) || defined(FREEBSD)) &&                                   \
+    !(defined(LINUX) || defined(FREEBSD) || defined(HAIKU)) &&                                   \
     !(defined(__GNUC__) && defined(_WIN32))
 
 //*******************************************************************************
diff --git a/toonz/sources/common/tipc/tipc.cpp b/toonz/sources/common/tipc/tipc.cpp
index d61b973..df5877b 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) || defined(FREEBSD)
+#elif defined(LINUX) || defined(FREEBSD) || defined(HAIKU)
 #include <sys/time.h>
 #include <unistd.h>
 #endif
diff --git a/toonz/sources/common/tsystem/tpluginmanager.cpp b/toonz/sources/common/tsystem/tpluginmanager.cpp
index a82fce8..4c0d20c 100644
--- a/toonz/sources/common/tsystem/tpluginmanager.cpp
+++ b/toonz/sources/common/tsystem/tpluginmanager.cpp
@@ -20,12 +20,16 @@
 #endif
 #include <stdio.h>
 #include <unistd.h>
+#ifndef HAIKU
 #include <sys/dir.h>
+#endif
 #include <sys/param.h>  // for getfsstat
 #ifdef MACOSX
 #include <sys/ucred.h>
 #endif
+#ifndef HAIKU
 #include <sys/mount.h>
+#endif
 #include <pwd.h>
 #include <dlfcn.h>
 #endif
@@ -172,7 +176,7 @@ void TPluginManager::loadPlugin(const TFilePath &fp) {
 void TPluginManager::loadPlugins(const TFilePath &dir) {
 #if defined(_WIN32)
   const std::string extension = "dll";
-#elif defined(LINUX) || defined(FREEBSD) || defined(__sgi)
+#elif defined(LINUX) || defined(FREEBSD) || defined(__sgi) || defined(HAIKU)
   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 130d28b..524cc5f 100644
--- a/toonz/sources/common/tsystem/tsystempd.cpp
+++ b/toonz/sources/common/tsystem/tsystempd.cpp
@@ -123,6 +123,23 @@
 
 #endif
 
+#ifdef HAIKU
+#define PLATFORM HAIKU
+#include <grp.h>
+#include <utime.h>
+#include <sys/param.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <dirent.h>
+#include <pwd.h>
+#include <dlfcn.h>
+#include <utime.h>
+#include <sys/time.h>
+
+#endif
+
 #ifndef PLATFORM
 PLATFORM_NOT_SUPPORTED
 #endif
@@ -216,6 +233,11 @@ bool TSystem::memoryShortage() {
   // to be done...
   return false;
 
+#elif defined(HAIKU)
+
+  // to be done...
+  return false;
+
 #else
 
   @ @ @ERROR : PLATFORM NOT SUPPORTED
@@ -308,6 +330,11 @@ TINT64 TSystem::getFreeMemorySize(bool onlyPhysicalMemory) {
   // to be done...
   totalFree = 512 * 1024;
 
+#elif defined(HAIKU)
+
+  // to be done...
+  totalFree = 512 * 1024;
+
 #else
   @ @ @ERROR : PLATFORM NOT SUPPORTED
 #endif
@@ -336,6 +363,9 @@ TINT64 TSystem::getDiskSize(const TFilePath &diskName) {
     return 0;
   }
 #ifndef _WIN32
+#ifdef HAIKU
+	size = 0;
+#else
   struct statfs buf;
 #ifdef __sgi
   statfs(::to_string(diskName).c_str(), &buf, sizeof(struct statfs), 0);
@@ -343,6 +373,7 @@ TINT64 TSystem::getDiskSize(const TFilePath &diskName) {
   statfs(::to_string(diskName).c_str(), &buf);
 #endif
   size = (TINT64)((buf.f_blocks * buf.f_bsize) >> 10);
+#endif
 #else
   DWORD sectorsPerCluster;     // sectors per cluster
   DWORD bytesPerSector;        // bytes per sector
@@ -373,6 +404,9 @@ TINT64 TSystem::getFreeDiskSize(const TFilePath &diskName) {
     return 0;
   }
 #ifndef _WIN32
+#ifdef HAIKU
+	size = 0;
+#else
   struct statfs buf;
 #ifdef __sgi
   statfs(diskName.getWideString().c_str(), &buf, sizeof(struct statfs), 0);
@@ -380,6 +414,7 @@ TINT64 TSystem::getFreeDiskSize(const TFilePath &diskName) {
   statfs(::to_string(diskName).c_str(), &buf);
 #endif
   size = (TINT64)(buf.f_bfree * buf.f_bsize) >> 10;
+#endif
 #else
   DWORD sectorsPerCluster;     // sectors per cluster
   DWORD bytesPerSector;        // bytes per sector
@@ -465,6 +500,11 @@ TINT64 TSystem::getMemorySize(bool onlyPhysicalMemory) {
   // to be done...
   return 512 * 1024;
 
+#elif defined(HAIKU)
+
+  // to be done...
+  return 512 * 1024;
+
 #else
   @ @ @ERROR : PLATFORM NOT SUPPORTED
 #endif
diff --git a/toonz/sources/common/tvrender/tofflinegl.cpp b/toonz/sources/common/tvrender/tofflinegl.cpp
index 3b50a5a..0908fe8 100644
--- a/toonz/sources/common/tvrender/tofflinegl.cpp
+++ b/toonz/sources/common/tvrender/tofflinegl.cpp
@@ -19,7 +19,7 @@
 
 #include "tthread.h"
 
-#elif defined(MACOSX)
+#elif defined(MACOSX) || defined(HAIKU)
 
 #include "qtofflinegl.h"
 
@@ -500,7 +500,7 @@ static std::shared_ptr<TOfflineGL::Imp> defaultOfflineGLGenerator(
   return std::make_shared<QtOfflineGL>(dim, shared);
 }
 
-#elif defined(MACOSX)
+#elif defined(MACOSX) || defined(HAIKU)
 
 std::shared_ptr<TOfflineGL::Imp> defaultOfflineGLGenerator(
     const TDimension &dim, std::shared_ptr<TOfflineGL::Imp> shared) {
diff --git a/toonz/sources/common/tvrender/ttessellator.cpp b/toonz/sources/common/tvrender/ttessellator.cpp
index a6ecdf8..4362b97 100644
--- a/toonz/sources/common/tvrender/ttessellator.cpp
+++ b/toonz/sources/common/tvrender/ttessellator.cpp
@@ -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) || defined(FREEBSD)
+#if defined(MACOSX) || defined(LINUX) || defined(FREEBSD) || defined(HAIKU)
 
 typedef GLvoid (*GluCallback)();
 
diff --git a/toonz/sources/image/3gp/tiio_3gp_proxy.cpp b/toonz/sources/image/3gp/tiio_3gp_proxy.cpp
index fca4c3e..fa0a2eb 100644
--- a/toonz/sources/image/3gp/tiio_3gp_proxy.cpp
+++ b/toonz/sources/image/3gp/tiio_3gp_proxy.cpp
@@ -1,7 +1,7 @@
 
 
 #if defined(x64) || defined(__LP64__) || defined(LINUX) || defined(FREEBSD) || \
-    (defined(_WIN32) && defined(__GNUC__))
+    defined(HAIKU) || (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 d777839..810f3bd 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(FREEBSD) || (defined(_WIN32) && defined(__GNUC__))
+#if defined(x64) || defined(__LP64__) || defined(LINUX) || defined(FREEBSD) || defined(HAIKU) || (defined(_WIN32) && defined(__GNUC__))
 
 // Qt includes
 #include <QString>
diff --git a/toonz/sources/image/compatibility/tfile_io.c b/toonz/sources/image/compatibility/tfile_io.c
index 83c3ac1..bef8892 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) || defined(FREEBSD)
+#if defined(MACOSX) || defined(LINUX) || defined(FREEBSD) || defined(HAIKU)
 
 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 fa8a9f7..1bf9774 100644
--- a/toonz/sources/image/compatibility/tfile_io.h
+++ b/toonz/sources/image/compatibility/tfile_io.h
@@ -19,7 +19,7 @@ extern "C" {
 
 char *convertWCHAR2CHAR(const wchar_t *fname);
 
-#if defined(MACOSX) || defined(LINUX) || defined(FREEBSD)
+#if defined(MACOSX) || defined(LINUX) || defined(FREEBSD) || defined(HAIKU)
 
 #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 e903fad..50eddbe 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) || defined(FREEBSD)
+#elif defined(LINUX) || defined(FREEBSD) || defined(HAIKU)
   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) || defined(FREEBSD)
+#elif defined(LINUX) || defined(FREEBSD) || defined(HAIKU)
   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 8718ed2..93b0dc2 100644
--- a/toonz/sources/image/mov/tiio_mov_proxy.cpp
+++ b/toonz/sources/image/mov/tiio_mov_proxy.cpp
@@ -1,7 +1,7 @@
 
 
 #if defined(x64) || defined(__LP64__) || defined(LINUX) || defined(FREEBSD) || \
-    (defined(_WIN32) && defined(__GNUC__))
+    defined(HAIKU) || (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 fbd8213..3fdbe70 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(FREEBSD) || (defined(_WIN32) && defined(__GNUC__))
+#if defined(x64) || defined(__LP64__) || defined(LINUX) || defined(FREEBSD)  || defined(HAIKU) || (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 df4d586..d003e5e 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(FREEBSD) || (defined(_WIN32) && defined(__GNUC__))
+#if defined(LINUX) || defined(FREEBSD) || (defined(_WIN32) && defined(__GNUC__)) || defined(HAIKU)
 template <typename T>
 T abs_workaround(T a) {
   return (a > 0) ? a : -a;
diff --git a/toonz/sources/image/tiio.cpp b/toonz/sources/image/tiio.cpp
index 0bfd43f..97d766e 100644
--- a/toonz/sources/image/tiio.cpp
+++ b/toonz/sources/image/tiio.cpp
@@ -54,7 +54,7 @@
 #include "./mov/tiio_movM.h"
 #include "./3gp/tiio_3gpM.h"
 
-#elif defined(LINUX) || defined(FREEBSD)  // No more supported by the way...
+#elif defined(LINUX) || defined(FREEBSD) || defined(HAIKU)  // No more supported by the way...
 // #include "./mov/tiio_movL.h"
 #include "./mov/tiio_mov_proxy.h"
 #include "./3gp/tiio_3gp_proxy.h"
diff --git a/toonz/sources/include/movsettings.h b/toonz/sources/include/movsettings.h
index 9008f7d..ad64de9 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(FREEBSD)) && !(defined(__GNUC__) && defined(_WIN32))
+#if !defined(x64) && !defined(__LP64__) && !(defined(LINUX) || defined(FREEBSD) || defined(HAIKU)) && !(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 3b5e5b3..499d13b 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) || defined(FREEBSD)
+#elif defined(LINUX) || defined(FREEBSD) || defined(HAIKU)
 #include <GL/glut.h>
 #include <cstring>
 #endif
diff --git a/toonz/sources/include/tgl.h b/toonz/sources/include/tgl.h
index 09e64fb..5c993b1 100644
--- a/toonz/sources/include/tgl.h
+++ b/toonz/sources/include/tgl.h
@@ -21,7 +21,7 @@
 #define GLUT_NO_WARNING_DISABLE
 #endif
 
-#if defined(LINUX) || defined(FREEBSD)
+#if defined(LINUX) || defined(FREEBSD) || defined(HAIKU)
 #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 ec67785..308a251 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) || defined(FREEBSD)
+#elif defined(LINUX) || defined(FREEBSD) || defined(HAIKU)
 #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 6aaaf84..5b1e56c 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) || defined(FREEBSD))
+#elif defined(__LP64__) && !(defined(LINUX) || defined(FREEBSD) || defined(HAIKU))
 
 #define TINT32                                                                 \
   ;                                                                            \
@@ -40,6 +40,13 @@ typedef int32_t TINT32;
 typedef uint32_t TUINT32;
 typedef int64_t TINT64;
 typedef uint64_t TUINT64;
+
+#elif defined(HAIKU)
+#include <stdint.h>
+#define TINT32 int32_t
+typedef uint32_t TUINT32;
+typedef int64_t TINT64;
+typedef uint64_t TUINT64;
 #endif
 
 #endif
diff --git a/toonz/sources/include/toonz4.6/machine.h b/toonz/sources/include/toonz4.6/machine.h
index 75ebe74..e2efddb 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) || defined(FREEBSD)
+#elif defined(LINUX) || defined(FREEBSD) || defined(HAIKU)
 #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 45a67a1..2b01366 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(FREEBSD) || defined(MACOSX)
+#if defined(LINUX) || defined(FREEBSD) || defined(MACOSX) || defined(HAIKU)
 
 #ifdef powerpc
 
diff --git a/toonz/sources/t32bitsrv/main.cpp b/toonz/sources/t32bitsrv/main.cpp
index 806904f..44830cf 100644
--- a/toonz/sources/t32bitsrv/main.cpp
+++ b/toonz/sources/t32bitsrv/main.cpp
@@ -1,6 +1,6 @@
 
 
-#if (!(defined(x64) || defined(__LP64__) || defined(LINUX) || defined(FREEBSD)))
+#if (!(defined(x64) || defined(__LP64__) || defined(LINUX) || defined(FREEBSD) || defined(HAIKU)))
 
 // Toonz includes
 #include "tiio_std.h"
diff --git a/toonz/sources/t32bitsrv/t323gpmsg.cpp b/toonz/sources/t32bitsrv/t323gpmsg.cpp
index 84ead44..14dc606 100644
--- a/toonz/sources/t32bitsrv/t323gpmsg.cpp
+++ b/toonz/sources/t32bitsrv/t323gpmsg.cpp
@@ -1,6 +1,6 @@
 
 
-#if (!(defined(x64) || defined(__LP64__) || defined(LINUX) || defined(FREEBSD)))
+#if (!(defined(x64) || defined(__LP64__) || defined(LINUX) || defined(FREEBSD) || defined(HAIKU)))
 
 // Toonz stuff
 #include "tiio.h"
diff --git a/toonz/sources/t32bitsrv/t32movmsg.cpp b/toonz/sources/t32bitsrv/t32movmsg.cpp
index 9c8d49d..a3b2bbf 100644
--- a/toonz/sources/t32bitsrv/t32movmsg.cpp
+++ b/toonz/sources/t32bitsrv/t32movmsg.cpp
@@ -1,6 +1,6 @@
 
 
-#if (!(defined(x64) || defined(__LP64__) || defined(LINUX) || defined(FREEBSD)))
+#if (!(defined(x64) || defined(__LP64__) || defined(LINUX) || defined(FREEBSD) || defined(HAIKU)))
 
 // Toonz stuff
 #include "tiio.h"
diff --git a/toonz/sources/toonz/CMakeLists.txt b/toonz/sources/toonz/CMakeLists.txt
index 770d6b7..d3aee49 100644
--- a/toonz/sources/toonz/CMakeLists.txt
+++ b/toonz/sources/toonz/CMakeLists.txt
@@ -540,7 +540,7 @@ elseif(BUILD_ENV_UNIXLIKE)
     # 変なところにライブラリ生成するカスども
     set(EXTRA_LIBS ${EXTRA_LIBS} "$<TARGET_FILE:tnzstdfx>" "$<TARGET_FILE:tfarm>")
 
-    set(EXTRA_LIBS ${EXTRA_LIBS} ${Boost_LIBRARIES} ${OPENBLAS_LIB})
+    set(EXTRA_LIBS ${EXTRA_LIBS} ${Boost_LIBRARIES} ${OPENBLAS_LIB} ${EXECINFO_LIBRARY})
     if(PLATFORM EQUAL 64)
         set(EXTRA_LIBS ${EXTRA_LIBS} Qt5::SerialPort ${TURBOJPEG_LIB} ${OpenCV_LIBS})
     endif()
@@ -701,7 +701,7 @@ TOONZSTUDIOPALETTE=\"\$HOME/.config/OpenToonz/stuff/studiopalette\"
 EOF
 fi
 
-export LD_LIBRARY_PATH=\${OPENTOONZ_BASE}/lib/opentoonz:\${LD_LIBRARY_PATH}
+export ${PRELOAD_VARIABLE}=\${OPENTOONZ_BASE}/lib/opentoonz:\${${PRELOAD_VARIABLE}}
 
 exec \$OPENTOONZ_BASE/bin/OpenToonz \"\$@\"
 ")
diff --git a/toonz/sources/toonz/main.cpp b/toonz/sources/toonz/main.cpp
index 826615c..b7dc6fe 100644
--- a/toonz/sources/toonz/main.cpp
+++ b/toonz/sources/toonz/main.cpp
@@ -479,7 +479,9 @@ int main(int argc, char *argv[]) {
   fmt.setStencil(true);
   QGLFormat::setDefaultFormat(fmt);
 
+#ifndef __HAIKU__
   glutInit(&argc, argv);
+#endif
 
   splash.showMessage(offsetStr + "Initializing Toonz environment ...",
                      Qt::AlignCenter, Qt::white);
diff --git a/toonz/sources/toonz/sceneviewer.cpp b/toonz/sources/toonz/sceneviewer.cpp
index 9b71873..ca4e52c 100644
--- a/toonz/sources/toonz/sceneviewer.cpp
+++ b/toonz/sources/toonz/sceneviewer.cpp
@@ -1,5 +1,5 @@
 
-#if defined(LINUX) || defined(FREEBSD)
+#if defined(LINUX) || defined(FREEBSD) || defined(HAIKU)
 #define GL_GLEXT_PROTOTYPES
 #endif