From e81e9c5450467f6cc2f6f4105245b8dfeabd41f2 Mon Sep 17 00:00:00 2001
From: Jean-Francois Panisset <panisset@gmail.com>
Date: Tue, 27 Feb 2024 23:16:54 -0800
Subject: [PATCH] Retain backwards compatibility

Signed-off-by: Jean-Francois Panisset <panisset@gmail.com>
---
 CMakeLists.txt           | 7 ++++++-
 src/py/CMakeLists.txt    | 6 +++++-
 src/tests/CMakeLists.txt | 6 +++++-
 src/tools/CMakeLists.txt | 6 +++++-
 4 files changed, 21 insertions(+), 4 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index b98c8d8..1338c2b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -121,7 +121,12 @@ set(OpenGL_GL_PREFERENCE GLVND)
 find_package(Threads REQUIRED)
 find_package(GLUT REQUIRED)
 find_package(OpenGL REQUIRED)
-find_package(Python COMPONENTS Interpreter Development)
+if(CMAKE_VERSION VERSION_GREATER_EQUAL "3.12")
+    find_package(Python COMPONENTS Interpreter Development)
+else()
+    find_package(PythonInterp REQUIRED)
+    find_package(PythonLibs REQUIRED)
+endif()
 find_package(ZLIB)
 if (ZLIB_FOUND)
     add_definitions(-DPARTIO_USE_ZLIB)
diff --git a/src/py/CMakeLists.txt b/src/py/CMakeLists.txt
index 4d7c45b..56ac174 100644
--- a/src/py/CMakeLists.txt
+++ b/src/py/CMakeLists.txt
@@ -52,7 +52,11 @@ target_include_directories(
 )
 target_link_libraries(partio_mod PRIVATE ${PYTHON_LIBRARIES} partio)
 
-set(PYTHON_DEST "${CMAKE_INSTALL_LIBDIR}/python${Python_VERSION_MAJOR}.${Python_VERSION_MINOR}/site-packages" )
+if(CMAKE_VERSION VERSION_GREATER_EQUAL "3.12")
+    set(PYTHON_DEST "${CMAKE_INSTALL_LIBDIR}/python${Python_VERSION_MAJOR}.${Python_VERSION_MINOR}/site-packages" )
+else()
+    set(PYTHON_DEST "${CMAKE_INSTALL_LIBDIR}/python${PYTHON_VERSION_MAJOR}.${PYTHON_VERSION_MINOR}/site-packages" )
+endif()
 
 install(TARGETS partio_mod DESTINATION ${PYTHON_DEST})
 install(FILES partio.i DESTINATION ${CMAKE_INSTALL_DATADIR}/swig)
diff --git a/src/tests/CMakeLists.txt b/src/tests/CMakeLists.txt
index ce44c27..855d09f 100644
--- a/src/tests/CMakeLists.txt
+++ b/src/tests/CMakeLists.txt
@@ -50,7 +50,11 @@ else()
     endforeach(item)
 
     foreach(item testpartjson testpartio)
-        add_test(NAME ${item} COMMAND ${Python_EXECUTABLE} -B ${CMAKE_CURRENT_SOURCE_DIR}/${item}.py)
+        if(CMAKE_VERSION VERSION_GREATER_EQUAL "3.12")
+            add_test(NAME ${item} COMMAND ${Python_EXECUTABLE} -B ${CMAKE_CURRENT_SOURCE_DIR}/${item}.py)
+        else()
+            add_test(NAME ${item} COMMAND ${PYTHON_EXECUTABLE} -B ${CMAKE_CURRENT_SOURCE_DIR}/${item}.py)
+        endif()
         install(PROGRAMS ${item}.py DESTINATION ${CMAKE_INSTALL_PARTIO_TESTDIR} RENAME ${item})
     endforeach(item)
 endif()
diff --git a/src/tools/CMakeLists.txt b/src/tools/CMakeLists.txt
index 6ca7e82..372bbaa 100644
--- a/src/tools/CMakeLists.txt
+++ b/src/tools/CMakeLists.txt
@@ -67,5 +67,9 @@ install(PROGRAMS partedit.py DESTINATION ${CMAKE_INSTALL_BINDIR} RENAME partedit
 install(PROGRAMS partjson.py DESTINATION ${CMAKE_INSTALL_BINDIR} RENAME partjson)
 install(PROGRAMS partinspect.py DESTINATION ${CMAKE_INSTALL_BINDIR} RENAME partinspect)
 
-set(PYTHON_DEST "${CMAKE_INSTALL_LIBDIR}/python${Python_VERSION_MAJOR}.${Python_VERSION_MINOR}/site-packages" )
+if(CMAKE_VERSION VERSION_GREATER_EQUAL "3.12")
+    set(PYTHON_DEST "${CMAKE_INSTALL_LIBDIR}/python${Python_VERSION_MAJOR}.${Python_VERSION_MINOR}/site-packages" )
+else()
+    set(PYTHON_DEST "${CMAKE_INSTALL_LIBDIR}/python${PYTHON_VERSION_MAJOR}.${PYTHON_VERSION_MINOR}/site-packages" )
+endif()
 install(FILES partedit.py partjson.py partinspect.py DESTINATION ${PYTHON_DEST})