diff --git a/opencv-cpp20.patch b/opencv-cpp20.patch
new file mode 100644
index 00000000000..a232393d70b
--- /dev/null
+++ b/opencv-cpp20.patch
@@ -0,0 +1,11 @@
+--- a/modules/imgproc/test/test_houghlines.cpp	2023-07-18 08:46:05.532555671 +0200
++++ b/modules/imgproc/test/test_houghlines.cpp	2023-07-18 08:46:39.922490881 +0200
+@@ -53,7 +53,7 @@
+     T value;
+     float theta_eps;
+     float rho_eps;
+-    SimilarWith<T>(T val, float e, float r_e): value(val), theta_eps(e), rho_eps(r_e) { };
++    SimilarWith(T val, float e, float r_e): value(val), theta_eps(e), rho_eps(r_e) { };
+     bool operator()(const T& other);
+ };
+ 
diff --git a/opencv.spec b/opencv.spec
index c9a57885a3a..8419fa47f5d 100644
--- a/opencv.spec
+++ b/opencv.spec
@@ -6,11 +6,13 @@
 %define github_user opencv
 
 Source0: git+https://github.com/%{github_user}/opencv.git?obj=%{branch}/%{tag}&export=%{n}-%{realversion}&output=/%{n}-%{realversion}-%{tag}.tgz
+Patch0: opencv-cpp20
 BuildRequires: cmake ninja
 Requires: python3 py3-numpy libpng libjpeg-turbo libtiff zlib eigen OpenBLAS
 
 %prep
 %setup -n %{n}-%{realversion}
+%patch0 -p1
 
 %build
 rm -rf ../build
@@ -30,7 +32,8 @@ cmake ../%{n}-%{realversion} \
     -DPYTHON3_INCLUDE_DIR:PATH="${PYTHON3_ROOT}/include/python%{cms_python3_major_minor_version}" \
     -DPYTHON3_LIBRARY:FILEPATH="${PYTHON3_ROOT}/lib/libpython%{cms_python3_major_minor_version}.so" \
     -DCMAKE_BUILD_TYPE=Release \
-    -DCMAKE_PREFIX_PATH="${LIBPNG_ROOT};${LIBTIFF_ROOT};${LIBJPEG_TURBO_ROOT};${ZLIB_ROOT};${PYTHON3_ROOT};${PY2_NUMPY_ROOT};${PY3_NUMPY_ROOT};${EIGEN_ROOT};${OPENBLAS_ROOT}"
+    -DCMAKE_PREFIX_PATH="${LIBPNG_ROOT};${LIBTIFF_ROOT};${LIBJPEG_TURBO_ROOT};${ZLIB_ROOT};${PYTHON3_ROOT};${PY2_NUMPY_ROOT};${PY3_NUMPY_ROOT};${EIGEN_ROOT};${OPENBLAS_ROOT}" \
+    -DCMAKE_CXX_STANDARD=%{cms_cxx_standard}
 
 ninja -v %{makeprocesses}
 
diff --git a/pip/onnx.file b/pip/onnx.file
index fd919eb12c4..c9a85bb84e1 100644
--- a/pip/onnx.file
+++ b/pip/onnx.file
@@ -3,4 +3,4 @@ Patch0: py3-onnx
 %define patchsrc0 grep -q 'CMAKE_CXX_STANDARD  *11' CMakeLists.txt && sed -i -e 's|CMAKE_CXX_STANDARD  *11|CMAKE_CXX_STANDARD %{cms_cxx_standard}|' CMakeLists.txt
 Requires: cmake protobuf py3-protobuf py3-six py3-typing-extensions py3-numpy py3-pytest-runner
 %define runpath_opts -n pb -n onnx
-%define PipPreBuild export ONNX_ML=1;export CMAKE_ARGS="-DCMAKE_CXX_STANDARD=%{cms_cxx_standard} -DONNX_USE_PROTOBUF_SHARED_LIBS=ON -DProtobuf_USE_STATIC_LIBS=OFF -DCMAKE_PREFIX_PATH=%{cmake_prefix_path}"
+%define PipPreBuild export ONNX_ML=1;export CMAKE_ARGS="-DCMAKE_CXX_STANDARD=%{cms_cxx_standard} -DONNX_USE_PROTOBUF_SHARED_LIBS=ON -DProtobuf_USE_STATIC_LIBS=OFF -DCMAKE_PREFIX_PATH=%{cmake_prefix_path}"
\ No newline at end of file
diff --git a/protobuf.spec b/protobuf.spec
index 29467042de0..b97421d3bd3 100644
--- a/protobuf.spec
+++ b/protobuf.spec
@@ -28,8 +28,6 @@ cd ../build
 cmake ../%{n}-%{realversion} \
     -G Ninja \
     -DCMAKE_INSTALL_PREFIX="%{i}" \
-    -DCMAKE_BUILD_TYPE=Release \
-    -DCMAKE_CXX_STANDARD=17 \
     -Dprotobuf_BUILD_TESTS=OFF \
     -Dprotobuf_BUILD_SHARED_LIBS=ON \
     -Dutf8_range_ENABLE_INSTALL=ON \
@@ -45,5 +43,4 @@ ninja -v %{makeprocesses}
 
 cd ../build
 ninja -v %{makeprocesses} install
-rm -rf %{i}/lib/pkgconfig
- 
+rm -rf %{i}/lib/pkgconfig
\ No newline at end of file
diff --git a/py3-onnx.patch b/py3-onnx.patch
index 34d46d69acc..0815c44bf78 100644
--- a/py3-onnx.patch
+++ b/py3-onnx.patch
@@ -8,4 +8,4 @@
 +CMAKE = find_executable("cmake")
  MAKE = find_executable("make")
  
- install_requires = []
+ install_requires = []
\ No newline at end of file
diff --git a/sherpa-cpp20.patch b/sherpa-cpp20.patch
new file mode 100644
index 00000000000..b76c3ace7a5
--- /dev/null
+++ b/sherpa-cpp20.patch
@@ -0,0 +1,35 @@
+From 1de52ee230891277370fc4f787fc8cb4b7626ef2 Mon Sep 17 00:00:00 2001
+From: iarspider <iarspider@gmail.com>
+Date: Wed, 28 Jun 2023 07:35:10 +0000
+Subject: [PATCH] [ATOOLS] Fix C++20 compilation errors
+
+---
+ ATOOLS/Org/Getter_Function.H | 5 ++---
+ 1 file changed, 2 insertions(+), 3 deletions(-)
+
+diff --git a/ATOOLS/Org/Getter_Function.H b/ATOOLS/Org/Getter_Function.H
+index f68d190ca2..09340da390 100644
+--- a/ATOOLS/Org/Getter_Function.H
++++ b/ATOOLS/Org/Getter_Function.H
+@@ -84,7 +84,7 @@ namespace ATOOLS {
+       void PrintInfo(std::ostream &str,const size_t width) const;	\
+       Object_Type *operator()(const Parameter_Type &parameters) const;	\
+     public:								\
+-      Getter<OBJECT,PARAMETER,NAME,SORT>(const bool &d=true):		\
++      Getter(const bool &d=true):		\
+ 	Getter_Function<OBJECT,PARAMETER,SORT>(TAG)			\
+ 	{ SetDisplay(d); }						\
+     };									\
+@@ -107,8 +107,7 @@ namespace ATOOLS {
+       void PrintInfo(std::ostream &str,const size_t width) const;	\
+       Object_Type *operator()(const Parameter_Type &parameters) const;	\
+     public:								\
+-      Getter<OBJECT,PARAMETER,NAME,SORT>				\
+-	(const std::string &name,const bool d=true):			\
++      Getter(const std::string &name,const bool d=true):			\
+ 	Getter_Function<OBJECT,PARAMETER,SORT>(name)			\
+ 	{ SetDisplay(d); }						\
+     };									\
+-- 
+GitLab
+
diff --git a/sherpa.spec b/sherpa.spec
index 31ad30dad9b..5809ddd88df 100644
--- a/sherpa.spec
+++ b/sherpa.spec
@@ -3,6 +3,7 @@ Source: http://www.hepforge.org/archive/sherpa/SHERPA-MC-%{realversion}.tar.gz
 Requires: hepmc lhapdf blackhat sqlite python3 fastjet openmpi
 BuildRequires: mcfm swig autotools
 Patch0: sherpa-2.2.10-hepmcshort
+Patch1: sherpa-cpp20
 
 %ifos linux
 %ifnarch ppc64le
@@ -25,6 +26,7 @@ perl -p -i -e 's|-rdynamic||g' configure AddOns/Analysis/Scripts/Makefile.in
 %endif
 
 %patch0 -p1
+%patch1 -p1
 
 %build
 export PYTHON=$(which python3)