diff --git a/gdal-2.2.3.tar.xz b/gdal-2.2.3.tar.xz
deleted file mode 100644
index ca916fb..0000000
--- a/gdal-2.2.3.tar.xz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:a328d63d476b3653f5a25b5f7971e87a15cdf8860ab0729d4b1157ba988b8d0b
-size 8248472
diff --git a/gdal-2.2.4.tar.xz b/gdal-2.2.4.tar.xz
new file mode 100644
index 0000000..e839792
--- /dev/null
+++ b/gdal-2.2.4.tar.xz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:441eb1d1acb35238ca43a1a0a649493fc91fdcbab231d0747e9d462eea192278
+size 8255840
diff --git a/gdal-json-c-0.13.patch b/gdal-json-c-0.13.patch
deleted file mode 100644
index 45c86c5..0000000
--- a/gdal-json-c-0.13.patch
+++ /dev/null
@@ -1,84 +0,0 @@
-Index: gdal/ogr/ogrsf_frmts/geojson/ogrgeojsonwriter.cpp
-===================================================================
---- a/ogr/ogrsf_frmts/geojson/ogrgeojsonwriter.cpp	(revision 41042)
-+++ b/ogr/ogrsf_frmts/geojson/ogrgeojsonwriter.cpp	(revision 41043)
-@@ -28,4 +28,6 @@
-  ****************************************************************************/
- 
-+#define JSON_C_VER_013 (13 << 8)
-+
- #include "ogrgeojsonwriter.h"
- #include "ogrgeojsonutils.h"
-@@ -33,5 +35,9 @@
- #include "ogrgeojsonreader.h"
- #include <json.h>  // JSON-C
-+
-+#if (!defined(JSON_C_VERSION_NUM)) || (JSON_C_VERSION_NUM < JSON_C_VER_013)
- #include <json_object_private.h>
-+#endif
-+
- #include <printbuf.h>
- #include <ogr_api.h>
-@@ -1382,11 +1388,15 @@
-     // TODO(schwehr): Explain this casting.
-     const int nPrecision =
-+#if (!defined(JSON_C_VERSION_NUM)) || (JSON_C_VERSION_NUM < JSON_C_VER_013)
-         static_cast<int>(reinterpret_cast<GUIntptr_t>(jso->_userdata));
-+#else
-+        static_cast<int>(reinterpret_cast<GUIntptr_t>(json_object_get_userdata(jso)));
-+#endif
-     char szBuffer[75] = {};
--    OGRFormatDouble( szBuffer, sizeof(szBuffer), jso->o.c_double, '.',
-+    OGRFormatDouble( szBuffer, sizeof(szBuffer), json_object_get_double(jso), '.',
-                      (nPrecision < 0) ? 15 : nPrecision );
-     if( szBuffer[0] == 't' /*oobig */ )
-     {
--        CPLsnprintf(szBuffer, sizeof(szBuffer), "%.18g", jso->o.c_double);
-+        CPLsnprintf(szBuffer, sizeof(szBuffer), "%.18g", json_object_get_double(jso));
-     }
-     return printbuf_memappend(pb, szBuffer, static_cast<int>(strlen(szBuffer)));
-@@ -1418,9 +1428,9 @@
-     char szBuffer[75] = {};
-     int nSize = 0;
--    if( CPLIsNan(jso->o.c_double))
-+    if( CPLIsNan(json_object_get_double(jso)))
-         nSize = CPLsnprintf(szBuffer, sizeof(szBuffer), "NaN");
--    else if( CPLIsInf(jso->o.c_double) )
--    {
--        if( jso->o.c_double > 0 )
-+    else if( CPLIsInf(json_object_get_double(jso)) )
-+    {
-+        if( json_object_get_double(jso) > 0 )
-             nSize = CPLsnprintf(szBuffer, sizeof(szBuffer), "Infinity");
-         else
-@@ -1430,5 +1440,9 @@
-     {
-         char szFormatting[32] = {};
-+#if (!defined(JSON_C_VERSION_NUM)) || (JSON_C_VERSION_NUM < JSON_C_VER_013)
-         const int nSignificantFigures = (int) (GUIntptr_t) jso->_userdata;
-+#else
-+        const int nSignificantFigures = (int) (GUIntptr_t) json_object_get_userdata(jso);
-+#endif
-         const int nInitialSignificantFigures =
-             nSignificantFigures >= 0 ? nSignificantFigures : 17;
-@@ -1436,5 +1450,5 @@
-                     "%%.%dg", nInitialSignificantFigures);
-         nSize = CPLsnprintf(szBuffer, sizeof(szBuffer),
--                            szFormatting, jso->o.c_double);
-+                            szFormatting, json_object_get_double(jso));
-         const char* pszDot = NULL;
-         if( nSize+2 < static_cast<int>(sizeof(szBuffer)) &&
-@@ -1458,5 +1472,5 @@
-                             "%%.%dg", nInitialSignificantFigures- i);
-                 nSize = CPLsnprintf(szBuffer, sizeof(szBuffer),
--                                    szFormatting, jso->o.c_double);
-+                                    szFormatting, json_object_get_double(jso));
-                 pszDot = strchr(szBuffer, '.');
-                 if( pszDot != NULL &&
-@@ -1473,5 +1487,5 @@
-                             "%%.%dg", nInitialSignificantFigures);
-                 nSize = CPLsnprintf(szBuffer, sizeof(szBuffer),
--                                    szFormatting, jso->o.c_double);
-+                                    szFormatting, json_object_get_double(jso));
-                 if( nSize+2 < static_cast<int>(sizeof(szBuffer)) &&
-                     strchr(szBuffer, '.') == NULL )
diff --git a/gdal.changes b/gdal.changes
index 8768dc4..842ea68 100644
--- a/gdal.changes
+++ b/gdal.changes
@@ -1,3 +1,11 @@
+-------------------------------------------------------------------
+Thu Mar 22 06:15:25 UTC 2018 - bruno@ioda-net.ch
+
+- Update to new upstream bugfix release 2.2.4
+  See details https://trac.osgeo.org/gdal/wiki/Release/2.2.4-News
+- Remove merged patch gdal-json-c-0.13.patch
+- Maximize usage of pkgconfig
+
 -------------------------------------------------------------------
 Fri Jan 12 10:24:13 UTC 2018 - dimstar@opensuse.org
 
diff --git a/gdal.spec b/gdal.spec
index dfa55b9..01b27e0 100644
--- a/gdal.spec
+++ b/gdal.spec
@@ -16,19 +16,18 @@
 #
 
 
-%bcond_with ecw_support
 # Soname should be bumped on API/ABI break
 # http://trac.osgeo.org/gdal/ticket/4543
 %define soversion 20
 %define sourcename gdal
-
+%bcond_with ecw_support
 Name:           gdal
-Version:        2.2.3
+Version:        2.2.4
 Release:        0
 Summary:        GDAL/OGR - a translator library for raster and vector geospatial data formats
-License:        MIT and BSD-3-Clause and SUSE-Public-Domain
+License:        MIT AND BSD-3-Clause AND SUSE-Public-Domain
 Group:          Development/Libraries/C and C++
-Url:            http://www.gdal.org/
+URL:            http://www.gdal.org/
 Source0:        http://download.osgeo.org/%{name}/%{version}/%{sourcename}-%{version}.tar.xz
 Patch0:         gdal-perl.patch
 # Fix occasional parallel build failure
@@ -36,8 +35,6 @@ Patch1:         GDALmake.opt.in.patch
 # Fix hard coded name of libproj library
 # But libproj.so is valid if libproj-devel is installed ?
 Patch2:         gdal-libproj.patch
-# PATCH-FIX-UPSTREAM gdal-json-c-0.13.patch dimstar@opensuse.org -- Fix build with json-c 0.13; copied from gentoo
-Patch3:         gdal-json-c-0.13.patch
 BuildRequires:  blas-devel
 BuildRequires:  chrpath
 BuildRequires:  curl-devel
@@ -46,56 +43,61 @@ BuildRequires:  doxygen >= 1.4.2
 BuildRequires:  fdupes
 BuildRequires:  gcc-c++
 BuildRequires:  geos-devel >= 3
-BuildRequires:  geotiff-devel >= 1.2.1
 BuildRequires:  giflib-devel
 BuildRequires:  lapack-devel
-BuildRequires:  libexpat-devel >= 1.95.0
 # No more please we have openjpeg2
 # BuildRequires:  libjasper-devel
 # Using jasper create build error on arm, powerpc, s390
-BuildRequires:  libjpeg-devel
-BuildRequires:  libpng-devel
-BuildRequires:  libproj-devel
-BuildRequires:  libspatialite-devel
-BuildRequires:  libtiff-devel >= 3.6.0
 BuildRequires:  libtool
-BuildRequires:  libxerces-c-devel
-BuildRequires:  libxml2-devel
 BuildRequires:  mysql-devel
-BuildRequires:  netcdf-devel
 BuildRequires:  opencl-headers
-BuildRequires:  openjpeg2-devel
 BuildRequires:  perl-macros
+BuildRequires:  pkgconfig
 BuildRequires:  postgresql-devel
 BuildRequires:  python-numpy-devel
 BuildRequires:  python-setuptools
 BuildRequires:  python3-numpy-devel
 BuildRequires:  python3-setuptools
-BuildRequires:  sqlite-devel >= 3
 BuildRequires:  swig
 BuildRequires:  unixODBC-devel
-BuildRequires:  xz-devel
-BuildRequires:  zlib-devel >= 1.1.4
+BuildRequires:  pkgconfig(expat) >= 1.95.0
+BuildRequires:  pkgconfig(libgeotiff) >= 1.2.1
+BuildRequires:  pkgconfig(libjpeg)
+BuildRequires:  pkgconfig(liblzma)
+BuildRequires:  pkgconfig(libopenjp2)
+BuildRequires:  pkgconfig(libpng)
+BuildRequires:  pkgconfig(libtiff-4) >= 3.6.0
+BuildRequires:  pkgconfig(libxml-2.0)
+BuildRequires:  pkgconfig(netcdf)
 BuildRequires:  pkgconfig(poppler)
+BuildRequires:  pkgconfig(proj)
+BuildRequires:  pkgconfig(spatialite)
+BuildRequires:  pkgconfig(sqlite3)
+BuildRequires:  pkgconfig(xerces-c)
+BuildRequires:  pkgconfig(zlib) >= 1.1.4
 %if %{with ecw_support}
 BuildRequires:  libecwj2-devel
 %endif
 %if 0%{?suse_version} >= 1310
 BuildRequires:  autoconf
 BuildRequires:  automake
-BuildRequires:  freexl-devel
 BuildRequires:  hdf5-devel
-BuildRequires:  libwebp-devel
+BuildRequires:  pkgconfig(freexl)
+BuildRequires:  pkgconfig(libwebp)
+BuildRequires:  pkgconfig(libwebpdecoder)
+BuildRequires:  pkgconfig(libwebpdemux)
+BuildRequires:  pkgconfig(libwebpmux)
 %endif
 %if 0%{?suse_version} > 1320
-BuildRequires:  libjson-c-devel
-BuildRequires:  ocl-icd-devel
 BuildRequires:  opencl-headers
 BuildRequires:  perl-ExtUtils-MakeMaker
+BuildRequires:  pkgconfig(OpenCL)
+BuildRequires:  pkgconfig(json)
+BuildRequires:  pkgconfig(json-c)
+BuildRequires:  pkgconfig(ocl-icd)
 %else
 BuildRequires:  hdf-devel >= 4.0
 %endif
-BuildRoot:      %{_tmppath}/%{name}-%{version}-build
 
 %description
 GDAL is a translator library for raster geospatial data formats that
@@ -142,7 +144,6 @@ Summary:        GDAL Python module
 Group:          Development/Languages/Python
 Requires:       %{name} = %{version}-%{release}
 Provides:       python2-%{name} = %{version}
-%py_requires
 
 %description -n python-%{name}
 The GDAL python modules provide support to handle multiple GIS file formats.
@@ -160,7 +161,6 @@ The GDAL python modules provide support to handle multiple GIS file formats.
 %patch0 -p1
 %patch1 -p1
 %patch2 -p1
-%patch3 -p1
 
 # Fix mandir
 sed -i "s|^mandir=.*|mandir='\${prefix}/share/man'|" configure
@@ -172,7 +172,7 @@ done
 
 #Fix wrong /usr/bin/env phyton
 #Create the move to python3
-find . -iname "*.py" -exec sed -i 's,^#!/usr/bin/env python$,#!/usr/bin/python3,' {} \;
+find . -iname "*.py" -exec sed -i 's,^#!%{_bindir}/env python$,#!%{_bindir}/python3,' {} \;
 
 %build
 # need to regenerate (old one does not accept CFLAGS)
@@ -299,7 +299,6 @@ rm -rf %{buildroot}%{_bindir}/*.dox
 sed -i 's,\(#define PACKAGE_.*\),/* \1 */,' %{buildroot}%{_includedir}/gdal/cpl_config.h
 
 %post -n lib%{name}%{soversion} -p /sbin/ldconfig
-
 %postun	-n lib%{name}%{soversion} -p /sbin/ldconfig
 
 %files -n lib%{name}%{soversion}
@@ -362,49 +361,49 @@ sed -i 's,\(#define PACKAGE_.*\),/* \1 */,' %{buildroot}%{_includedir}/gdal/cpl_
 %{_bindir}/testepsg
 %defattr(644,root,root,755)
 %{_datadir}/gdal
-%{_mandir}/man1/gdal2tiles.1*
-%{_mandir}/man1/gdal_calc.1*
-%{_mandir}/man1/gdal_contour.1*
-%{_mandir}/man1/gdal_edit.1*
-%{_mandir}/man1/gdal_fillnodata.1*
-%{_mandir}/man1/gdal_grid.1*
-%{_mandir}/man1/gdal_merge.1*
-%{_mandir}/man1/gdal_pansharpen.1*
-%{_mandir}/man1/gdal_polygonize.1*
-%{_mandir}/man1/gdal_proximity.1*
-%{_mandir}/man1/gdal_rasterize.1*
-%{_mandir}/man1/gdal_retile.1*
-%{_mandir}/man1/gdal_sieve.1*
-%{_mandir}/man1/gdal_translate.1*
-%{_mandir}/man1/gdal_utilities.1*
-%{_mandir}/man1/gdaladdo.1*
-%{_mandir}/man1/gdalbuildvrt.1*
-%{_mandir}/man1/gdalcompare.1*
-%{_mandir}/man1/gdaldem.1*
-%{_mandir}/man1/gdalinfo.1*
-%{_mandir}/man1/gdallocationinfo.1*
-%{_mandir}/man1/gdalmanage.1*
-%{_mandir}/man1/gdalmove.1*
-%{_mandir}/man1/gdalsrsinfo.1*
-%{_mandir}/man1/gdaltindex.1*
-%{_mandir}/man1/gdaltransform.1*
-%{_mandir}/man1/gdalwarp.1*
-%{_mandir}/man1/gnm_utilities.1*
-%{_mandir}/man1/gnmanalyse.1*
-%{_mandir}/man1/gnmmanage.1*
-%{_mandir}/man1/nearblack.1*
-%{_mandir}/man1/ogr2ogr.1*
-%{_mandir}/man1/ogr_utilities.1*
-%{_mandir}/man1/ogrinfo.1*
-%{_mandir}/man1/ogrlineref.1*
-%{_mandir}/man1/ogrmerge.1*
-%{_mandir}/man1/ogrtindex.1*
-%{_mandir}/man1/pct2rgb.1*
-%{_mandir}/man1/rgb2pct.1*
+%{_mandir}/man1/gdal2tiles.1%{?ext_man}
+%{_mandir}/man1/gdal_calc.1%{?ext_man}
+%{_mandir}/man1/gdal_contour.1%{?ext_man}
+%{_mandir}/man1/gdal_edit.1%{?ext_man}
+%{_mandir}/man1/gdal_fillnodata.1%{?ext_man}
+%{_mandir}/man1/gdal_grid.1%{?ext_man}
+%{_mandir}/man1/gdal_merge.1%{?ext_man}
+%{_mandir}/man1/gdal_pansharpen.1%{?ext_man}
+%{_mandir}/man1/gdal_polygonize.1%{?ext_man}
+%{_mandir}/man1/gdal_proximity.1%{?ext_man}
+%{_mandir}/man1/gdal_rasterize.1%{?ext_man}
+%{_mandir}/man1/gdal_retile.1%{?ext_man}
+%{_mandir}/man1/gdal_sieve.1%{?ext_man}
+%{_mandir}/man1/gdal_translate.1%{?ext_man}
+%{_mandir}/man1/gdal_utilities.1%{?ext_man}
+%{_mandir}/man1/gdaladdo.1%{?ext_man}
+%{_mandir}/man1/gdalbuildvrt.1%{?ext_man}
+%{_mandir}/man1/gdalcompare.1%{?ext_man}
+%{_mandir}/man1/gdaldem.1%{?ext_man}
+%{_mandir}/man1/gdalinfo.1%{?ext_man}
+%{_mandir}/man1/gdallocationinfo.1%{?ext_man}
+%{_mandir}/man1/gdalmanage.1%{?ext_man}
+%{_mandir}/man1/gdalmove.1%{?ext_man}
+%{_mandir}/man1/gdalsrsinfo.1%{?ext_man}
+%{_mandir}/man1/gdaltindex.1%{?ext_man}
+%{_mandir}/man1/gdaltransform.1%{?ext_man}
+%{_mandir}/man1/gdalwarp.1%{?ext_man}
+%{_mandir}/man1/gnm_utilities.1%{?ext_man}
+%{_mandir}/man1/gnmanalyse.1%{?ext_man}
+%{_mandir}/man1/gnmmanage.1%{?ext_man}
+%{_mandir}/man1/nearblack.1%{?ext_man}
+%{_mandir}/man1/ogr2ogr.1%{?ext_man}
+%{_mandir}/man1/ogr_utilities.1%{?ext_man}
+%{_mandir}/man1/ogrinfo.1%{?ext_man}
+%{_mandir}/man1/ogrlineref.1%{?ext_man}
+%{_mandir}/man1/ogrmerge.1%{?ext_man}
+%{_mandir}/man1/ogrtindex.1%{?ext_man}
+%{_mandir}/man1/pct2rgb.1%{?ext_man}
+%{_mandir}/man1/rgb2pct.1%{?ext_man}
 
 %files devel
-%defattr(-,root,root)
-%doc NEWS PROVENANCE.TXT LICENSE.TXT
+%license LICENSE.TXT
+%doc NEWS PROVENANCE.TXT
 %defattr(644,root,root,755)
 %doc html
 %attr(755,root,root) %{_bindir}/gdal-config
@@ -412,11 +411,11 @@ sed -i 's,\(#define PACKAGE_.*\),/* \1 */,' %{buildroot}%{_includedir}/gdal/cpl_
 %{_libdir}/pkgconfig/gdal.pc
 %dir %{_includedir}/gdal
 %{_includedir}/gdal/*.h
-%{_mandir}/man1/gdal-config.1*
+%{_mandir}/man1/gdal-config.1%{?ext_man}
 
 %files -n perl-%{name}
-%defattr(-,root,root)
-%doc NEWS PROVENANCE.TXT LICENSE.TXT
+%license LICENSE.TXT
+%doc NEWS PROVENANCE.TXT
 %{perl_vendorarch}/Geo/GDAL.pm
 %dir %{perl_vendorarch}/Geo/GDAL
 %{perl_vendorarch}/Geo/GDAL/Const.pm
@@ -435,16 +434,18 @@ sed -i 's,\(#define PACKAGE_.*\),/* \1 */,' %{buildroot}%{_includedir}/gdal/cpl_
 %attr(755,root,root) %{perl_vendorarch}/auto/Geo/OGR/OGR.so
 %dir %{perl_vendorarch}/auto/Geo/OSR
 %attr(755,root,root) %{perl_vendorarch}/auto/Geo/OSR/OSR.so
-%{_mandir}/man3/Geo::GDAL.3*
+%{_mandir}/man3/Geo::GDAL.3pm%{?ext_man}
 
 %files -n python-%{name}
 %defattr(644,root,root,755)
-%doc NEWS PROVENANCE.TXT LICENSE.TXT
+%license LICENSE.TXT
+%doc NEWS PROVENANCE.TXT
 %{python_sitearch}/*
 
 %files -n python3-%{name}
 %defattr(644,root,root,755)
-%doc NEWS PROVENANCE.TXT LICENSE.TXT
+%license LICENSE.TXT
+%doc NEWS PROVENANCE.TXT
 %{python3_sitearch}/*
 
 %changelog