CentOS 8: update fm-common to use python3

1. change python2 rpms to python3 version.
2. update Cpython code to use new API in python3

Test:
Could pass rpm package build for fm-common

Story: 2007065
Task: 37942

Change-Id: Ie0490118bcc891c2e994b3eeb6efab24ac7951cb
Signed-off-by: Shuicheng Lin <shuicheng.lin@intel.com>
(cherry picked from commit a2af71b867)

fm-common/sources/Makefile

@@ -4,13 +4,24 @@ SRCS = fmAPI.cpp fmFile.cpp fmLog.cpp fmMsgServer.cpp fmMutex.cpp fmSocket.cpp f
 CLI_SRCS = fm_cli.cpp
 OBJS = $(SRCS:.cpp=.o)
 CLI_OBJS = fm_cli.o
-LDLIBS = -lstdc++ -lrt -luuid -lpq -lpthread -lpython2.7 -ljson-c
+LDLIBS = -lstdc++ -lrt -luuid -lpq -lpthread -ljson-c
 INCLUDES = -I./ -I$(shell pg_config --includedir)
-CCFLAGS = -g -O2 -Wall -Werror -fPIC
+CCFLAGS = -g -O2 -Wall -fPIC
 EXTRACCFLAGS= -Wformat -Wformat-security
 
 MAJOR ?= 1
 MINOR ?= 0
+OS_ID        = $(shell grep '^ID=' /etc/os-release | cut -f2- -d= | sed -e 's/\"//g')
+OS_VERSION_ID= $(shell grep '^VERSION_ID=' /etc/os-release | cut -f2- -d= | sed -e 's/\"//g')
+ifeq ($(OS_ID)-$(OS_VERSION_ID),centos-8)
+LDLIBS += -lpython3.6m
+INCLUDES += -I/usr/include/python3.6m
+CCFLAGS += -Werror
+else
+INCLUDES += -I/usr/include/python2.7
+LDLIBS += -lpython2.7
+endif
+
 
 DESTDIR ?= /
 BINDIR ?= /usr/local/bin

fm-common/sources/fmDbUtils.cpp

@@ -15,7 +15,7 @@
 #include <iostream>
 #include <assert.h>
 #include <arpa/inet.h>
-#include <python2.7/Python.h>
+#include <Python.h>
 
 
 #include "fmMutex.h"
@@ -611,15 +611,32 @@ bool fm_db_util_sync_event_suppression(void){
 
 	FILE* file;
 	int argc;
-	char * argv[2];
 
 	FM_INFO_LOG("Starting event suppression synchronization...\n");
 
 	argc = 2;
+
+#if PY_MAJOR_VERSION >= 3
+	wchar_t *py_argv[2];
+	py_argv[0] = Py_DecodeLocale(FM_DB_SYNC_EVENT_SUPPRESSION, NULL);
+	if (py_argv[0] == NULL) {
+		FM_ERROR_LOG("Fatal error: cannot decode argv[0]\n");
+		return false;
+	}
+	py_argv[1] = Py_DecodeLocale(db_conn, NULL);
+	if (py_argv[1] == NULL) {
+		PyMem_RawFree(py_argv[0]);
+		FM_ERROR_LOG("Fatal error: cannot decode argv[1]\n");
+		return false;
+	}
+	Py_SetProgramName(py_argv[0]);
+#else
+    char * argv[2];
     argv[0] = (char*)FM_DB_SYNC_EVENT_SUPPRESSION;
     argv[1] = (char*)db_conn;
 
     Py_SetProgramName(argv[0]);
+#endif
 	Py_Initialize();
 #if PY_MAJOR_VERSION >= 3
 	PySys_SetArgv(argc, py_argv);
@@ -630,6 +647,10 @@ bool fm_db_util_sync_event_suppression(void){
 	PyRun_SimpleFile(file, FM_DB_SYNC_EVENT_SUPPRESSION);
 	fclose(file);
 	Py_Finalize();
+#if PY_MAJOR_VERSION >= 3
+	PyMem_RawFree(py_argv[0]);
+	PyMem_RawFree(py_argv[1]);
+#endif
 
 	FM_INFO_LOG("Completed event suppression synchronization.\n");
 

fm-common/sources/fm_db_sync_event_suppression.py

@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/python3
 # Copyright (c) 2016-2018 Wind River Systems, Inc.
 #
 # SPDX-License-Identifier: Apache-2.0

fm-common/sources/fm_python_mod_main.cpp

@@ -4,8 +4,13 @@
 // SPDX-License-Identifier: Apache-2.0
 //
 
-
-#include <python2.7/Python.h>
+#if PY_MAJOR_VERSION >= 3
+#define PY_SSIZE_T_CLEAN
+#include <Python.h>
+#define PyString_FromString PyUnicode_FromString
+#else
+#include <Python.h>
+#endif
 #include <stdio.h>
 #include "fmAPI.h"
 #include "fmAlarmUtils.h"
@@ -313,6 +318,7 @@ static PyMethodDef _methods [] = {
 	    { NULL, NULL, 0, NULL }
 };
 
+#if PY_MAJOR_VERSION >= 3
 static struct PyModuleDef cModPyDem =
 {
 	PyModuleDef_HEAD_INIT,
@@ -321,15 +327,24 @@ static struct PyModuleDef cModPyDem =
 	-1,          /* size of per-interpreter state of the module, or -1 if the module keeps state in global variables. */
 	_methods
 };
+#endif
 
 #if PY_MAJOR_VERSION >= 3
 PyMODINIT_FUNC PyInit_fm_core() {
+        PyObject *m = PyModule_Create(&cModPyDem);
+        if (m == NULL){
+                PySys_WriteStderr("Failed to initialize fm_core");
+                return NULL;
+        }
+        return m;
+}
 #else
 PyMODINIT_FUNC initfm_core() {
-#endif
-	PyObject *m = PyModule_Create(&cModPyDem);
+        PyObject *m = Py_InitModule("fm_core", _methods);
         if (m == NULL){
                 PySys_WriteStderr("Failed to initialize fm_core");
                 return;
         }
 }
+#endif
+