diff --git a/.gitignore b/.gitignore
index 98b65b5..35e7589 100644
--- a/.gitignore
+++ b/.gitignore
@@ -41,3 +41,4 @@
 /gmsh-4.3.0-source-fedora.tar.xz
 /gmsh-4.4.0-source-fedora.tar.xz
 /gmsh-4.4.1-source-fedora.tar.xz
+/gmsh-4.5.1-source-fedora.tar.xz
diff --git a/gmsh.spec b/gmsh.spec
index fc2a7fc..78204ff 100644
--- a/gmsh.spec
+++ b/gmsh.spec
@@ -3,8 +3,8 @@
 
 Name:       gmsh
 Summary:    A three-dimensional finite element mesh generator
-Version:    4.4.1
-Release:    3%{?dist}
+Version:    4.5.1
+Release:    1%{?dist}
 
 # gmsh is GPLv2+ with exceptions, see LICENSE.txt
 # contrib/{DiscreteIntegration, HighOrderMeshOptimizer, MeshOptimizer, onelab} are MIT, see respective README.txt
@@ -21,12 +21,12 @@ Patch0:     gmsh_python.patch
 Patch1:     gmsh_c++14.patch
 # Adapt med.h include path
 Patch2:     gmsh_med.patch
-# Fix macro collision with symbol by re-ordering includes
-Patch3:     gmsh_build.patch
 # Install Julia API to share/gmsh
-Patch4:     gmsh_julia.patch
+Patch3:     gmsh_julia.patch
 # Remove odd install of gmsh shared library
-Patch5:     gmsh_install.patch
+Patch4:     gmsh_install.patch
+# Fix build error caused by include ordering
+Patch5:     gmsh_build.patch
 
 BuildRequires: alglib-devel
 BuildRequires: ann-devel
@@ -51,7 +51,7 @@ BuildRequires: mesa-libGLU-devel
 BuildRequires: metis-devel
 BuildRequires: mmg3d-devel
 BuildRequires: netgen-mesher-devel-private
-BuildRequires: OCE-devel
+BuildRequires: opencascade-devel
 BuildRequires: python3-devel
 BuildRequires: voro++-devel
 BuildRequires: zlib-devel
@@ -339,7 +339,7 @@ rm -f %{buildroot}%{_defaultdocdir}/%{name}/LICENSE.txt
 
 %files libs
 %license LICENSE.txt
-%{_libdir}/libgmsh.so.4.4*
+%{_libdir}/libgmsh.so.4.5*
 
 %files -n python3-%{name}
 %{python3_sitelib}/gmsh.py
@@ -357,7 +357,7 @@ rm -f %{buildroot}%{_defaultdocdir}/%{name}/LICENSE.txt
 
 %files openmpi-libs
 %license LICENSE.txt
-%{_libdir}/openmpi/lib/libgmsh.so.4.4*
+%{_libdir}/openmpi/lib/libgmsh.so.4.5*
 %endif
 
 %if %{with mpich}
@@ -372,11 +372,14 @@ rm -f %{buildroot}%{_defaultdocdir}/%{name}/LICENSE.txt
 
 %files mpich-libs
 %license LICENSE.txt
-%{_libdir}/mpich/lib/libgmsh.so.4.4*
+%{_libdir}/mpich/lib/libgmsh.so.4.5*
 %endif
 
 
 %changelog
+* Sat Dec 28 2019 Sandro Mani <manisandro@gmail.com> - 4.5.1-1
+- Update to 4.5.1
+
 * Thu Oct 03 2019 Miro Hrončok <mhroncok@redhat.com> - 4.4.1-3
 - Rebuilt for Python 3.8.0rc1 (#1748018)
 
diff --git a/gmsh_build.patch b/gmsh_build.patch
index 5244775..640051b 100644
--- a/gmsh_build.patch
+++ b/gmsh_build.patch
@@ -1,41 +1,6 @@
-diff -rupN gmsh-4.4.1-source/Common/CommandLine.cpp gmsh-4.4.1-source-new/Common/CommandLine.cpp
---- gmsh-4.4.1-source/Common/CommandLine.cpp	2019-07-29 16:44:32.132608978 +0200
-+++ gmsh-4.4.1-source-new/Common/CommandLine.cpp	2019-07-29 16:44:32.135608880 +0200
-@@ -22,15 +22,6 @@
- #include "GmshGlobal.h"
- #include "StringUtils.h"
- 
--#if defined(HAVE_FLTK)
--#include <FL/Fl.H>
--#if (FL_MAJOR_VERSION == 1) && (FL_MINOR_VERSION >= 3)
--// OK
--#else
--#error "Gmsh requires FLTK >= 1.3"
--#endif
--#endif
--
- #if defined(HAVE_PETSC)
- #include "petsc.h"
- #endif
-@@ -51,6 +42,15 @@
- #include "Parser.h"
- #endif
- 
-+#if defined(HAVE_FLTK)
-+#include <FL/Fl.H>
-+#if (FL_MAJOR_VERSION == 1) && (FL_MINOR_VERSION >= 3)
-+// OK
-+#else
-+#error "Gmsh requires FLTK >= 1.3"
-+#endif
-+#endif
-+
- int GetGmshMajorVersion(){ return GMSH_MAJOR_VERSION; }
- int GetGmshMinorVersion(){ return GMSH_MINOR_VERSION; }
- int GetGmshPatchVersion(){ return GMSH_PATCH_VERSION; }
-diff -rupN gmsh-4.4.1-source/Fltk/helpWindow.cpp gmsh-4.4.1-source-new/Fltk/helpWindow.cpp
---- gmsh-4.4.1-source/Fltk/helpWindow.cpp	2019-07-29 16:44:32.132608978 +0200
-+++ gmsh-4.4.1-source-new/Fltk/helpWindow.cpp	2019-07-29 16:44:32.136608848 +0200
+diff -rupN --no-dereference gmsh-4.5.1-source/Fltk/helpWindow.cpp gmsh-4.5.1-source-new/Fltk/helpWindow.cpp
+--- gmsh-4.5.1-source/Fltk/helpWindow.cpp	2019-12-28 22:38:32.870791389 +0100
++++ gmsh-4.5.1-source-new/Fltk/helpWindow.cpp	2019-12-28 22:38:33.154793777 +0100
 @@ -3,6 +3,12 @@
  // See the LICENSE.txt file for license information. Please report all
  // issues on https://gitlab.onelab.info/gmsh/gmsh/issues.
@@ -57,29 +22,28 @@ diff -rupN gmsh-4.4.1-source/Fltk/helpWindow.cpp gmsh-4.4.1-source-new/Fltk/help
  #include "FlGui.h"
  #include "inputValue.h"
  #include "helpWindow.h"
-diff -rupN gmsh-4.4.1-source/Fltk/helpWindow.cpp.rej gmsh-4.4.1-source-new/Fltk/helpWindow.cpp.rej
---- gmsh-4.4.1-source/Fltk/helpWindow.cpp.rej	1970-01-01 01:00:00.000000000 +0100
-+++ gmsh-4.4.1-source-new/Fltk/helpWindow.cpp.rej	2019-07-29 16:44:32.136608848 +0200
-@@ -0,0 +1,22 @@
-+--- Fltk/helpWindow.cpp	2019-04-19 22:52:22.064137747 +0200
-++++ Fltk/helpWindow.cpp	2019-04-19 22:52:22.067137724 +0200
-+@@ -3,13 +3,18 @@
-+ // See the LICENSE.txt file for license information. Please report all
-+ // issues on https://gitlab.onelab.info/gmsh/gmsh/issues.
-+ 
-++#include "GmshConfig.h"
-++
-++#if defined(HAVE_MED)
-++#include <med/med.h>
-++#endif
-++
-+ #include <sstream>
-+ #include <algorithm>
-+ #include <FL/Fl_Help_View.H>
-+ #include <FL/Fl_Check_Button.H>
-+ #include <FL/Fl_Input.H>
-+ #include <FL/Fl_Color_Chooser.H>
-+-#include "GmshConfig.h"
-+ #include "FlGui.h"
-+ #include "inputValue.h"
-+ #include "helpWindow.h"
+diff -rupN --no-dereference gmsh-4.5.1-source/Mesh/gmshCrossFields.cpp gmsh-4.5.1-source-new/Mesh/gmshCrossFields.cpp
+--- gmsh-4.5.1-source/Mesh/gmshCrossFields.cpp	2019-12-21 03:59:26.000000000 +0100
++++ gmsh-4.5.1-source-new/Mesh/gmshCrossFields.cpp	2019-12-28 22:38:33.153793768 +0100
+@@ -20,10 +20,6 @@
+ #include "PView.h"
+ #include "PViewDataGModel.h"
+ 
+-#ifdef HAVE_FLTK
+-#include "FlGui.h"
+-#endif
+-
+ #if defined(_OPENMP)
+ #include <omp.h>
+ #endif
+@@ -37,6 +33,10 @@
+ #include "linearSystemFull.h"
+ #include "linearSystemPETSc.h"
+ 
++#ifdef HAVE_FLTK
++#include "FlGui.h"
++#endif
++
+ static inline double lifting(double a, double _a)
+ {
+   double D = M_PI * .5;
diff --git a/gmsh_c++14.patch b/gmsh_c++14.patch
index a8f3d0d..9aa1b7e 100644
--- a/gmsh_c++14.patch
+++ b/gmsh_c++14.patch
@@ -1,16 +1,16 @@
-diff -rupN gmsh-4.4.1-source/CMakeLists.txt gmsh-4.4.1-source-new/CMakeLists.txt
---- gmsh-4.4.1-source/CMakeLists.txt	2019-07-29 16:44:31.843618424 +0200
-+++ gmsh-4.4.1-source-new/CMakeLists.txt	2019-07-29 16:44:31.845618358 +0200
-@@ -43,7 +43,7 @@ opt(BUILD_ANDROID "Enable Android NDK li
- opt(BUILD_IOS "Enable iOS library target (experimental)" OFF)
- opt(CGNS "Enable CGNS mesh import (experimental)" ${DEFAULT})
+diff -rupN --no-dereference gmsh-4.5.1-source/CMakeLists.txt gmsh-4.5.1-source-new/CMakeLists.txt
+--- gmsh-4.5.1-source/CMakeLists.txt	2019-12-28 22:38:32.609789193 +0100
++++ gmsh-4.5.1-source-new/CMakeLists.txt	2019-12-28 22:38:32.611789209 +0100
+@@ -44,7 +44,7 @@ opt(BUILD_IOS "Enable iOS library target
+ opt(CGNS "Enable CGNS import/export (experimental)" ${DEFAULT})
+ opt(CGNS_CPEX0045 "Enable high-order CGNS import/export following CPEX0045 (experimental)" OFF)
  opt(CAIRO "Enable Cairo to render fonts (experimental)" ${DEFAULT})
 -opt(CXX11 "Enable C++11" ON)
 +opt(CXX14 "Enable C++14" ON)
  opt(C99 "Enable C99" ON)
  opt(PROFILE "Enable profiling compiler flags" OFF)
  opt(DINTEGRATION "Enable discrete integration (needed for levelsets)" ${DEFAULT})
-@@ -305,13 +305,13 @@ if(ENABLE_OPENMP)
+@@ -324,13 +324,13 @@ if(ENABLE_OPENACC)
    endif()
  endif()
  
@@ -31,7 +31,7 @@ diff -rupN gmsh-4.4.1-source/CMakeLists.txt gmsh-4.4.1-source-new/CMakeLists.txt
  
  if(ENABLE_C99)
    # in recent cmake versions we could do e.g. set(CMAKE_C_STANDARD 99)
-@@ -1509,10 +1509,10 @@ if(ENABLE_REVOROPT)
+@@ -1537,10 +1537,10 @@ if(ENABLE_REVOROPT)
      get_source_file_property(PROP Plugin/CVTRemesh.cpp COMPILE_FLAGS)
      if(PROP)
        set_source_files_properties(Plugin/CVTRemesh.cpp PROPERTIES
@@ -44,7 +44,7 @@ diff -rupN gmsh-4.4.1-source/CMakeLists.txt gmsh-4.4.1-source-new/CMakeLists.txt
      endif()
    else()
      message(WARNING "Revoropt requires Eigen3, Mesh, Plugins, ANN and ALGLIB")
-@@ -1692,7 +1692,7 @@ if(ENABLE_BUILD_ANDROID)
+@@ -1720,7 +1720,7 @@ if(ENABLE_BUILD_ANDROID)
      message(FATAL_ERROR "Cannot compile Gmsh for android without android-cmake")
    endif()
    add_definitions(-D_GLIBCXX_USE_C99_MATH=1)
diff --git a/gmsh_install.patch b/gmsh_install.patch
index 72589f4..b6a5807 100644
--- a/gmsh_install.patch
+++ b/gmsh_install.patch
@@ -1,7 +1,7 @@
-diff -rupN gmsh-4.4.1-source/CMakeLists.txt gmsh-4.4.1-source-new/CMakeLists.txt
---- gmsh-4.4.1-source/CMakeLists.txt	2019-07-29 16:44:32.383600789 +0200
-+++ gmsh-4.4.1-source-new/CMakeLists.txt	2019-07-29 16:44:32.385600723 +0200
-@@ -1838,7 +1838,7 @@ endif()
+diff -rupN --no-dereference gmsh-4.5.1-source/CMakeLists.txt gmsh-4.5.1-source-new/CMakeLists.txt
+--- gmsh-4.5.1-source/CMakeLists.txt	2019-12-28 22:38:32.995792440 +0100
++++ gmsh-4.5.1-source-new/CMakeLists.txt	2019-12-28 22:38:32.997792457 +0100
+@@ -1866,7 +1866,7 @@ endif()
  if(ENABLE_BUILD_SHARED OR ENABLE_BUILD_DYNAMIC)
    install(TARGETS shared DESTINATION ${GMSH_LIB} OPTIONAL)
    # FIXME once we cleanup the installation of the python module
diff --git a/gmsh_julia.patch b/gmsh_julia.patch
index 3bea278..f2b3903 100644
--- a/gmsh_julia.patch
+++ b/gmsh_julia.patch
@@ -1,7 +1,7 @@
-diff -rupN gmsh-4.4.1-source/CMakeLists.txt gmsh-4.4.1-source-new/CMakeLists.txt
---- gmsh-4.4.1-source/CMakeLists.txt	2019-07-29 16:44:31.974614136 +0200
-+++ gmsh-4.4.1-source-new/CMakeLists.txt	2019-07-29 16:44:32.251605096 +0200
-@@ -1847,7 +1847,7 @@ endif()
+diff -rupN --no-dereference gmsh-4.5.1-source/CMakeLists.txt gmsh-4.5.1-source-new/CMakeLists.txt
+--- gmsh-4.5.1-source/CMakeLists.txt	2019-12-28 22:38:32.740790295 +0100
++++ gmsh-4.5.1-source-new/CMakeLists.txt	2019-12-28 22:38:32.872791405 +0100
+@@ -1875,7 +1875,7 @@ endif()
  if(ENABLE_BUILD_LIB OR ENABLE_BUILD_SHARED OR ENABLE_BUILD_DYNAMIC)
    install(FILES ${GMSH_API} DESTINATION ${GMSH_INC})
    install(FILES ${GMSH_PY} DESTINATION ${PYTHON3_SITE_PACKAGES})
diff --git a/gmsh_med.patch b/gmsh_med.patch
index 6dbe524..b9fe64d 100644
--- a/gmsh_med.patch
+++ b/gmsh_med.patch
@@ -1,7 +1,7 @@
-diff -rupN gmsh-4.4.1-source/Common/CommandLine.cpp gmsh-4.4.1-source-new/Common/CommandLine.cpp
---- gmsh-4.4.1-source/Common/CommandLine.cpp	2019-07-14 22:16:04.000000000 +0200
-+++ gmsh-4.4.1-source-new/Common/CommandLine.cpp	2019-07-29 16:44:31.994613481 +0200
-@@ -40,7 +40,7 @@
+diff -rupN --no-dereference gmsh-4.5.1-source/Common/CommandLine.cpp gmsh-4.5.1-source-new/Common/CommandLine.cpp
+--- gmsh-4.5.1-source/Common/CommandLine.cpp	2019-12-21 03:59:24.000000000 +0100
++++ gmsh-4.5.1-source-new/Common/CommandLine.cpp	2019-12-28 22:38:32.742790312 +0100
+@@ -42,7 +42,7 @@
  #endif
  
  #if defined(HAVE_MED)
@@ -10,9 +10,9 @@ diff -rupN gmsh-4.4.1-source/Common/CommandLine.cpp gmsh-4.4.1-source-new/Common
  #endif
  
  #if defined(HAVE_POST)
-diff -rupN gmsh-4.4.1-source/Fltk/helpWindow.cpp gmsh-4.4.1-source-new/Fltk/helpWindow.cpp
---- gmsh-4.4.1-source/Fltk/helpWindow.cpp	2019-07-14 22:16:04.000000000 +0200
-+++ gmsh-4.4.1-source-new/Fltk/helpWindow.cpp	2019-07-29 16:44:32.004613155 +0200
+diff -rupN --no-dereference gmsh-4.5.1-source/Fltk/helpWindow.cpp gmsh-4.5.1-source-new/Fltk/helpWindow.cpp
+--- gmsh-4.5.1-source/Fltk/helpWindow.cpp	2019-12-21 03:59:24.000000000 +0100
++++ gmsh-4.5.1-source-new/Fltk/helpWindow.cpp	2019-12-28 22:38:32.742790312 +0100
 @@ -38,7 +38,7 @@
  #endif
  
@@ -22,9 +22,9 @@ diff -rupN gmsh-4.4.1-source/Fltk/helpWindow.cpp gmsh-4.4.1-source-new/Fltk/help
  #endif
  
  static const char *help_link(Fl_Widget *w, const char *uri)
-diff -rupN gmsh-4.4.1-source/Geo/GModelIO_MED.cpp gmsh-4.4.1-source-new/Geo/GModelIO_MED.cpp
---- gmsh-4.4.1-source/Geo/GModelIO_MED.cpp	2019-07-14 23:15:09.000000000 +0200
-+++ gmsh-4.4.1-source-new/Geo/GModelIO_MED.cpp	2019-07-29 16:44:32.004613155 +0200
+diff -rupN --no-dereference gmsh-4.5.1-source/Geo/GModelIO_MED.cpp gmsh-4.5.1-source-new/Geo/GModelIO_MED.cpp
+--- gmsh-4.5.1-source/Geo/GModelIO_MED.cpp	2019-11-28 15:09:31.000000000 +0100
++++ gmsh-4.5.1-source-new/Geo/GModelIO_MED.cpp	2019-12-28 22:38:32.742790312 +0100
 @@ -26,7 +26,7 @@
  #include "discreteVertex.h"
  #include "Context.h"
@@ -34,10 +34,10 @@ diff -rupN gmsh-4.4.1-source/Geo/GModelIO_MED.cpp gmsh-4.4.1-source-new/Geo/GMod
  
  #if(MED_MAJOR_NUM >= 3)
  // To avoid too many ifdefs below we use defines for the bits of the
-diff -rupN gmsh-4.4.1-source/Post/PViewDataGModelIO.cpp gmsh-4.4.1-source-new/Post/PViewDataGModelIO.cpp
---- gmsh-4.4.1-source/Post/PViewDataGModelIO.cpp	2019-05-14 21:27:31.000000000 +0200
-+++ gmsh-4.4.1-source-new/Post/PViewDataGModelIO.cpp	2019-07-29 16:44:32.005613122 +0200
-@@ -469,7 +469,7 @@ void PViewDataGModel::importLists(int N[
+diff -rupN --no-dereference gmsh-4.5.1-source/Post/PViewDataGModelIO.cpp gmsh-4.5.1-source-new/Post/PViewDataGModelIO.cpp
+--- gmsh-4.5.1-source/Post/PViewDataGModelIO.cpp	2019-12-20 19:05:44.000000000 +0100
++++ gmsh-4.5.1-source-new/Post/PViewDataGModelIO.cpp	2019-12-28 22:38:32.742790312 +0100
+@@ -471,7 +471,7 @@ void PViewDataGModel::importLists(int N[
  
  #if defined(HAVE_MED)
  
diff --git a/gmsh_python.patch b/gmsh_python.patch
index 6209fce..3134c2c 100644
--- a/gmsh_python.patch
+++ b/gmsh_python.patch
@@ -1,7 +1,7 @@
-diff -rupN gmsh-4.4.1-source/CMakeLists.txt gmsh-4.4.1-source-new/CMakeLists.txt
---- gmsh-4.4.1-source/CMakeLists.txt	2019-07-14 22:16:04.000000000 +0200
-+++ gmsh-4.4.1-source-new/CMakeLists.txt	2019-07-29 16:44:31.726622254 +0200
-@@ -1819,6 +1819,8 @@ else()
+diff -rupN --no-dereference gmsh-4.5.1-source/CMakeLists.txt gmsh-4.5.1-source-new/CMakeLists.txt
+--- gmsh-4.5.1-source/CMakeLists.txt	2019-12-22 11:16:32.000000000 +0100
++++ gmsh-4.5.1-source-new/CMakeLists.txt	2019-12-28 22:38:32.460787939 +0100
+@@ -1847,6 +1847,8 @@ else()
    set(GMSH_INC ${CMAKE_INSTALL_INCLUDEDIR})
  endif()
  
@@ -10,7 +10,7 @@ diff -rupN gmsh-4.4.1-source/CMakeLists.txt gmsh-4.4.1-source-new/CMakeLists.txt
  # FIXME: change this once we understand rpaths
  if(APPLE)
    if(ENABLE_BUILD_DYNAMIC OR ENABLE_BUILD_SHARED)
-@@ -1840,11 +1842,11 @@ if(ENABLE_BUILD_SHARED OR ENABLE_BUILD_D
+@@ -1868,11 +1870,11 @@ if(ENABLE_BUILD_SHARED OR ENABLE_BUILD_D
  endif()
  
  if(ENABLE_ONELAB)
@@ -24,9 +24,9 @@ diff -rupN gmsh-4.4.1-source/CMakeLists.txt gmsh-4.4.1-source-new/CMakeLists.txt
    install(FILES ${GMSH_JL} DESTINATION ${GMSH_LIB})
    if(ENABLE_PRIVATE_API)
      install(FILES ${GMSH_PRIVATE_API} DESTINATION ${GMSH_INC}/gmsh)
-diff -rupN gmsh-4.4.1-source/Common/GmshMessage.cpp gmsh-4.4.1-source-new/Common/GmshMessage.cpp
---- gmsh-4.4.1-source/Common/GmshMessage.cpp	2019-07-14 22:16:04.000000000 +0200
-+++ gmsh-4.4.1-source-new/Common/GmshMessage.cpp	2019-07-29 16:44:31.726622254 +0200
+diff -rupN --no-dereference gmsh-4.5.1-source/Common/GmshMessage.cpp gmsh-4.5.1-source-new/Common/GmshMessage.cpp
+--- gmsh-4.5.1-source/Common/GmshMessage.cpp	2019-12-25 23:34:11.000000000 +0100
++++ gmsh-4.5.1-source-new/Common/GmshMessage.cpp	2019-12-28 22:38:32.461787948 +0100
 @@ -154,12 +154,6 @@ void Msg::Init(int argc, char **argv)
    if(CTX::instance()->exeFileName.empty() && argc && argv)
      CTX::instance()->exeFileName = argv[0];
diff --git a/sources b/sources
index d7fd881..e77165b 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (gmsh-4.4.1-source-fedora.tar.xz) = b8e2210c80a3309232f3b4a6353eaec57704b0a2705a9b181b83aa6282bb4ae7fe07365047d88c3c772f31dcdf60347720fe84ec8621fea9bb06b1f2c377ca3e
+SHA512 (gmsh-4.5.1-source-fedora.tar.xz) = 1cbd21bfafef5ce06066bd59fbfc1ac55c4bf9d4f0e7657877ae1535b1ef2a46ac70bd666075f2fde3bbad3b3d3df048ad043adfd9773fdb58be24692bcd622d