$ git diff --patch-with-stat --summary 55738c16492d612be08bab6d3b3b1c5c81d75cb1..010f5e6c3d83f28fd60f8ec83d29b553deb2ef6b

 openscenegraph.spec | 23 ++++++++++++-----------
 1 file changed, 12 insertions(+), 11 deletions(-)

diff --git a/openscenegraph.spec b/openscenegraph.spec
index a5552cc..b8f23c8 100644
--- a/openscenegraph.spec
+++ b/openscenegraph.spec
@@ -4,13 +4,14 @@
 Summary:	A C++ scene graph API on OpenGL for real time graphics
 Name:		openscenegraph
 Version:	3.6.5
-Release:	1
+Release:	3
 Epoch:		1
 License:	LGPLv2+ with exceptions
 Group:		System/Libraries
 Url:		http://www.openscenegraph.org/
 Source0:	https://github.com/openscenegraph/OpenSceneGraph/archive/%{srcname}-%{version}.tar.gz
 BuildRequires:	cmake
+BuildRequires:	ninja
 BuildRequires:	ffmpeg-devel
 BuildRequires:	gdal-devel
 BuildRequires:	jpeg-devel
@@ -712,16 +713,16 @@ This package contains development files for %{name}
 %autopatch -p1
 
 %build
-CFLAGS="%{optflags} -pthread"
-CXXFLAGS="%{optflags} -pthread"
-rpm --eval %__isa_bits
-%ifarch aarch64 znver1 x86_64 riscv64
-%cmake -DLIB_POSTFIX=64
-%else
-%cmake
+#CFLAGS="%{optflags} -pthread"
+#CXXFLAGS="%{optflags} -pthread"
+%cmake \
+%ifarch aarch64 %{x86_64} riscv64 ppc64 ppc64le
+	-DLIB_POSTFIX=64 \
 %endif
-%make_build VERBOSE=TRUE
+	-DCMAKE_RELWITHDEBINFO_POSTFIX="" \
+	-G Ninja
 
-%install
-%makeinstall_std -C build
+VERBOSE=true %ninja_build
 
+%install
+%ninja_install -C build