support configs for several python versions

configure/CONFIG_PY

@@ -1,13 +1,21 @@
-PYMODULE ?= YES
-
 ifneq ($(T_A),)
 
--include $(dir $(lastword $(MAKEFILE_LIST)))/os/CONFIG_PY.$(EPICS_HOST_ARCH).Common
+PYMODULE ?= YES
--include $(dir $(lastword $(MAKEFILE_LIST)))/os/CONFIG_PY.Common.$(T_A)
+
--include $(dir $(lastword $(MAKEFILE_LIST)))/os/CONFIG_PY.$(EPICS_HOST_ARCH).$(T_A)
+ifeq ($(PY_VER),)
+$(error Must set PY_VER to select a python version)
+endif
+
+-include $(dir $(lastword $(MAKEFILE_LIST)))/os/CONFIG_PY$(PY_VER).$(EPICS_HOST_ARCH).Common
+-include $(dir $(lastword $(MAKEFILE_LIST)))/os/CONFIG_PY$(PY_VER).Common.$(T_A)
+-include $(dir $(lastword $(MAKEFILE_LIST)))/os/CONFIG_PY$(PY_VER).$(EPICS_HOST_ARCH).$(T_A)
+
+-include $(dir $(lastword $(MAKEFILE_LIST)))/os/CONFIG_SITE_PY$(PY_VER).$(EPICS_HOST_ARCH).Common
+-include $(dir $(lastword $(MAKEFILE_LIST)))/os/CONFIG_SITE_PY$(PY_VER).Common.$(T_A)
+-include $(dir $(lastword $(MAKEFILE_LIST)))/os/CONFIG_SITE_PY$(PY_VER).$(EPICS_HOST_ARCH).$(T_A)
 
 ifneq ($(PY_OK),YES)
-$(error Unable to get generated python configuration)
+$(error No usable configuration for python$(PY_VER))
 endif
 
 PYTHON ?= python$(PY_VER)

configure/CONFIG_SITE

@@ -32,6 +32,9 @@ CHECK_RELEASE = YES
 #   take effect.
 #IOCS_APPL_TOP = </IOC/path/to/application/top>
 
+# Default python version.
+PY_VER=2.7
+
 # Module will be build against this version of the
 # Python interpreter
-PYTHON ?= python
+#PYTHON = python$(PY_VER)

configure/Makefile

@@ -2,15 +2,20 @@ TOP=..
 
 include $(TOP)/configure/CONFIG
 
+ifeq ($(PY_VER),)
+$(error Must set PY_VER to select a python version)
+endif
+PYTHON ?= python$(PY_VER)
+
 TARGETS = $(CONFIG_TARGETS)
 
 ifdef T_A
-CONFIGS = CONFIG_PY RULES_PY os/CONFIG_PY.Common.$(T_A)
+CONFIGS = CONFIG_PY RULES_PY os/CONFIG_PY$(PY_VER).Common.$(T_A)
 endif
 
 include $(TOP)/configure/RULES
 
-os/CONFIG_PY.Common.%: $(TOP)/makehelper.py
+os/CONFIG_PY$(PY_VER).Common.$(T_A): $(TOP)/makehelper.py
 	[ -d $(dir $@) ] || $(MKDIR) $(dir $@)
 	$(PYTHON) $< $@