From c0c4ea543439c740e3ee848fdd055c633a47f6c5 Mon Sep 17 00:00:00 2001
From: Eduard Valeyev <eduard@valeyev.net>
Date: Wed, 20 Dec 2023 15:53:43 -0500
Subject: [PATCH 1/2] FindPython3 -> FindPython

this allows to unify python discovery across the stack (instead of using a mix of PythonInterp, Python3, and Python)
---
 CMakeLists.txt                    | 2 +-
 src/madness/tensor/CMakeLists.txt | 8 ++++----
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 169c067afc3..2e398df6dc2 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.11.0)
+cmake_minimum_required (VERSION 3.12.0)  # for FindPython
 
 if(NOT CMAKE_BUILD_TYPE)
   set(CMAKE_BUILD_TYPE Release)
diff --git a/src/madness/tensor/CMakeLists.txt b/src/madness/tensor/CMakeLists.txt
index 2747e619609..acc872e7b3a 100644
--- a/src/madness/tensor/CMakeLists.txt
+++ b/src/madness/tensor/CMakeLists.txt
@@ -1,18 +1,18 @@
 # src/madness/tensor
 
 # Add targets for generated header files
-find_package(Python3)
-if(Python3_Interpreter_FOUND)
+find_package(Python COMPONENTS Interpreter)
+if(TARGET Python::Interpreter)
   add_custom_command(
       OUTPUT ${CMAKE_CURRENT_SOURCE_DIR}/tensoriter_spec.h
              ${CMAKE_CURRENT_SOURCE_DIR}/tensor_spec.h
-      COMMAND ${Python3_EXECUTABLE} tempspec.py
+      COMMAND ${Python_EXECUTABLE} tempspec.py
       MAIN_DEPENDENCY tempspec.py
       WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
       COMMENT "Generating tensoriter_spec.h and tensor_spec.h")
 elseif(NOT EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/tensoriter_spec.h.h
     OR NOT EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/tensor_spec.h)
-  message(FATAL_ERROR "PYTHON executable is not available to generate required source files")
+  message(FATAL_ERROR "Python executable is not available to generate required source files")
 endif()
 
 # Source lists for MADtensor

From 66552962aea6e8b51f1d1ce29cbf62991ead9957 Mon Sep 17 00:00:00 2001
From: Eduard Valeyev <eduard@valeyev.net>
Date: Mon, 11 Dec 2023 09:06:11 -0500
Subject: [PATCH 2/2] try to fix TBB detection issues described in
 https://github.com/m-a-d-n-e-s-s/madness/issues/510

---
 cmake/modules/FindTBB.cmake | 51 ++++++++++++++++++-------------------
 1 file changed, 25 insertions(+), 26 deletions(-)

diff --git a/cmake/modules/FindTBB.cmake b/cmake/modules/FindTBB.cmake
index b832016b4b6..2199921f0e9 100644
--- a/cmake/modules/FindTBB.cmake
+++ b/cmake/modules/FindTBB.cmake
@@ -73,32 +73,6 @@
 #  FindTBB helper functions and macros
 #
 
-# Use TBBConfig.cmake if possible.
-
-set(_tbb_find_quiet)
-if (TBB_FIND_QUIETLY)
-  set(_tbb_find_quiet QUIET)
-endif ()
-set(_tbb_find_components)
-set(_tbb_find_optional_components)
-foreach (_tbb_find_component IN LISTS TBB_FIND_COMPONENTS)
-  if (TBB_FIND_REQUIRED_${_tbb_find_component})
-    list(APPEND _tbb_find_components "${_tbb_find_component}")
-  else ()
-    list(APPEND _tbb_find_optional_components "${_tbb_find_component}")
-  endif ()
-endforeach ()
-unset(_tbb_find_component)
-find_package(TBB CONFIG ${_tbb_find_quiet}
-        COMPONENTS ${_tbb_find_components}
-        OPTIONAL_COMPONENTS ${_tbb_find_optional_components})
-unset(_tbb_find_quiet)
-unset(_tbb_find_components)
-unset(_tbb_find_optional_components)
-if (TBB_FOUND)
-  return ()
-endif ()
-
 #====================================================
 # Fix the library path in case it is a linker script
 #====================================================
@@ -238,6 +212,31 @@ set(TBB_PREFIX_PATH ${TBBROOT} ${ENV_TBBROOT})
 set(TBB_INC_SEARCH_PATH "")
 set(TBB_LIB_SEARCH_PATH "")
 
+# Use TBBConfig.cmake if possible.
+set(_tbb_find_quiet)
+if (TBB_FIND_QUIETLY)
+  set(_tbb_find_quiet QUIET)
+endif ()
+set(_tbb_find_components)
+set(_tbb_find_optional_components)
+foreach (_tbb_find_component IN LISTS TBB_FIND_COMPONENTS)
+  if (TBB_FIND_REQUIRED_${_tbb_find_component})
+    list(APPEND _tbb_find_components "${_tbb_find_component}")
+  else ()
+    list(APPEND _tbb_find_optional_components "${_tbb_find_component}")
+  endif ()
+endforeach ()
+unset(_tbb_find_component)
+find_package(TBB CONFIG ${_tbb_find_quiet}
+        COMPONENTS ${_tbb_find_components}
+        OPTIONAL_COMPONENTS ${_tbb_find_optional_components}
+        HINTS ${TBB_PREFIX_PATH})
+unset(_tbb_find_quiet)
+unset(_tbb_find_components)
+unset(_tbb_find_optional_components)
+if (TBB_FOUND)
+  return ()
+endif ()
 
 # If user built from sources
 set(TBB_BUILD_PREFIX $ENV{TBB_BUILD_PREFIX})