Revert "extended _find_python_binary to make sure the binary matches the library version"

This reverts commit 77521f73.

cmake_support/FindPython.cmake

@@ -70,44 +70,22 @@ endmacro()
 
 macro(_find_python_bin PYTHON_ROOT VERSION)
   string(REPLACE "." "" _VERSION_NO_DOTS ${VERSION})
-  foreach(_NAME "python" "python${_VERSION_NO_DOTS}" "python${VERSION}")
-    if(PYTHON_ROOT)
-      find_program(PYTHON_BINARY
-                   NAMES ${_NAME}
-                   HINTS "${PYTHON_ROOT}"
-                   PATH_SUFFIXES bin
-                   NO_SYSTEM_ENVIRONMENT_PATH NO_DEFAULT_PATH)
-      if(PYTHON_BINARY)
-        execute_process(COMMAND ${PYTHON_BINARY} -V
-                        OUTPUT_VARIABLE PY_VERSION
-                        ERROR_VARIABLE PY_VERSION)
-        if(PY_VERSION MATCHES ${VERSION})
-          break()
-        else()
-          unset(PYTHON_BINARY CACHE)
-        endif()
-      endif()
-    else()
-      find_program(PYTHON_BINARY
-                   NAMES  $_NAME
-                   HINTS "${CMAKE_PREFIX_PATH}"
-                   PATH_SUFFIXES bin)  
-      if(PYTHON_BINARY)
-        execute_process(COMMAND ${PYTHON_BINARY} -V
-                        OUTPUT_VARIABLE PY_VERSION
-                        ERROR_VARIABLE PY_VERSION)
-        if(${PY_VERSION} matches ${VERSION})
-          break()
-        else()
-          unset(PYTHON_BINARY CACHE)
-        endif()
-      endif()
-    endif()  
-  endforeach()
+  if(PYTHON_ROOT)
+    find_program(PYTHON_BINARY
+      NAMES "python" "python${_VERSION_NO_DOTS}" "python${VERSION}"
+      HINTS "${PYTHON_ROOT}"
+      PATH_SUFFIXES bin
+      NO_SYSTEM_ENVIRONMENT_PATH NO_DEFAULT_PATH
+    )
+  else()
+    find_program(PYTHON_BINARY
+      NAMES "python" "python${_VERSION_NO_DOTS}" "python${VERSION}"
+      HINTS "${CMAKE_PREFIX_PATH}"
+      PATH_SUFFIXES bin
+    )  
+  endif()  
 endmacro()
 
-
-
 #-------------------------------------------------------------------------------
 # check for python lib
 #
@@ -136,7 +114,7 @@ macro(check_for_python_binary)
     foreach(_VERSION ${PYTHON_VERSIONS})
       if(${PYTHON_MIN_VERSION} VERSION_LESS ${_VERSION})
         _find_python_bin("${PYTHON_ROOT}" "${_VERSION}")
-        if(PYTHON_BINARY)
+        if(PYTHON_LIBRARIES)
           set(PYTHON_VERSION "${_VERSION}")
           break()
         endif()