diff --git a/gfan.changes b/gfan.changes
index 24fc6e2..11e65b7 100644
--- a/gfan.changes
+++ b/gfan.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Fri Aug 31 16:51:31 UTC 2012 - scorot@free.fr
+
+- add libtool in build requirement for 12.2
+- import patches from fedora to fix build with gcc 4.7 
+
 -------------------------------------------------------------------
 Sun Mar 18 21:47:55 UTC 2012 - scorot@free.fr
 
diff --git a/gfan.spec b/gfan.spec
index 15b185e..07ad0ef 100644
--- a/gfan.spec
+++ b/gfan.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package gfan
 #
-# Copyright (c) 2011 SUSE LINUX Products GmbH, Nuernberg, Germany.
+# Copyright (c) 2012 SUSE LINUX Products GmbH, Nuernberg, Germany.
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -15,24 +15,37 @@
 # Please submit bugfixes or comments via http://bugs.opensuse.org/
 #
 
+
 Name:           gfan
 %define lname	libgfan-0_5
 Version:        0.5
 Release:        0
-Group:          Productivity/Scientific/Math
-Summary:	Calculation of Gröbner fans
+Summary:        Calculation of Gröbner fans
 License:        GPL-2.0
-URL:            http://home.imf.au.dk/jensen/software/gfan/gfan.html
+Group:          Productivity/Scientific/Math
+Url:            http://home.imf.au.dk/jensen/software/gfan/gfan.html
 
 Source:         %name%version.tar.bz2
-Patch1:		gfan-automake.diff
-Patch2:		gfan-format.diff
-Patch3:		gfan-returns.diff
+Patch0:         gfan-automake.diff
+# Sent upstream 2011 Apr 27.  Respect DESTDIR
+Patch1:         gfan-respect-destdir.patch
+# Sent upstream 2011 Apr 27.  Fix 64-bit issues in printf statements by
+# using %%zu instead of %%i for printing size_t values.
+Patch2:         gfan-format.patch
+# Sent upstream 2011 Apr 27.  Fix warnings that could indicate runtime
+# problems.
+Patch3:         gfan-warning.patch
+# Treate plain "gfan" call as "gfan_bases" call (as done in previous versions)
+# instead of priting warning telling to call it as "gfan_bases" and exiting
+Patch4:         gfan-permissive.patch
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build
-BuildRequires:	cddlib-devel, gcc-c++, gmp-devel
+BuildRequires:  cddlib-devel
+BuildRequires:  gcc-c++
+BuildRequires:  gmp-devel
+BuildRequires:  libtool
 %define with_pdf 1
 %if 0%{?with_pdf}
-BuildRequires:	texlive-latex
+BuildRequires:  texlive-latex
 %endif
 
 %description
@@ -40,25 +53,34 @@ Gfan is a software package for computing Gröbner fans and tropical
 varieties. These are polyhedral fans associated to polynomial ideals.
 
 %package -n %lname
-Summary:	Library for calculation of Gröbner fans
-Group:		System/Libraries
+Summary:        Library for calculation of Gröbner fans
+Group:          System/Libraries
 
 %description -n %lname
 Gfan is a software package for computing Gröbner fans and tropical
 varieties. These are polyhedral fans associated to polynomial ideals.
 
 %package -n libgfan-devel
-Summary:	Development files for libgfan
-Group:		Development/Libraries/C and C++
-Requires:	%lname = %version
+Summary:        Development files for libgfan
+Group:          Development/Libraries/C and C++
+Requires:       %lname = %version
 
 %description -n libgfan-devel
 Gfan is a software package for computing Gröbner fans and tropical
 varieties. These are polyhedral fans associated to polynomial ideals.
 
 %prep
-%setup -qn %name%version
-%patch -P 1 -P 2 -P 3 -p1
+%setup -q -n %{name}%{version}
+%patch0 -p1
+%patch1
+%patch2
+%patch3
+%patch4 -p1
+
+# Point to where the TOPCOM binaries will be installed
+sed -i \
+  "s|^#define MINKOWSKIPROG.*|#define MINKOWSKIPROGRAM \"%{_bindir}/essai\"|" \
+  minkowskisum.cpp
 
 %build
 autoreconf -fi;