diff --git a/.gitignore b/.gitignore
index 03b6fd1..b3a28a5 100755
--- a/.gitignore
+++ b/.gitignore
@@ -1,8 +1,368 @@
-*~
-*.swp
-bazel-*
 workspace/
+
+# Created by https://www.toptal.com/developers/gitignore/api/vim,bazel,linux,macos,python,intellij+all,visualstudiocode
+# Edit at https://www.toptal.com/developers/gitignore?templates=vim,bazel,linux,macos,python,intellij+all,visualstudiocode
+
+### Bazel ###
+# gitignore template for Bazel build system
+# website: https://bazel.build/
+
+# Ignore all bazel-* symlinks. There is no full list since this can change
+# based on the name of the directory bazel is cloned into.
+/bazel-*
+
+# Directories for the Bazel IntelliJ plugin containing the generated
+# IntelliJ project files and plugin configuration. Seperate directories are
+# for the IntelliJ, Android Studio and CLion versions of the plugin.
+/.ijwb/
+/.aswb/
+/.clwb/
+
+### Intellij+all ###
+# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio, WebStorm and Rider
+# Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839
+
+# User-specific stuff
+.idea/**/workspace.xml
+.idea/**/tasks.xml
+.idea/**/usage.statistics.xml
+.idea/**/dictionaries
+.idea/**/shelf
+
+# AWS User-specific
+.idea/**/aws.xml
+
+# Generated files
+.idea/**/contentModel.xml
+
+# Sensitive or high-churn files
+.idea/**/dataSources/
+.idea/**/dataSources.ids
+.idea/**/dataSources.local.xml
+.idea/**/sqlDataSources.xml
+.idea/**/dynamic.xml
+.idea/**/uiDesigner.xml
+.idea/**/dbnavigator.xml
+
+# Gradle
+.idea/**/gradle.xml
+.idea/**/libraries
+
+# Gradle and Maven with auto-import
+# When using Gradle or Maven with auto-import, you should exclude module files,
+# since they will be recreated, and may cause churn.  Uncomment if using
+# auto-import.
+# .idea/artifacts
+# .idea/compiler.xml
+# .idea/jarRepositories.xml
+# .idea/modules.xml
+# .idea/*.iml
+# .idea/modules
+# *.iml
+# *.ipr
+
+# CMake
+cmake-build-*/
+
+# Mongo Explorer plugin
+.idea/**/mongoSettings.xml
+
+# File-based project format
+*.iws
+
+# IntelliJ
+out/
+
+# mpeltonen/sbt-idea plugin
+.idea_modules/
+
+# JIRA plugin
+atlassian-ide-plugin.xml
+
+# Cursive Clojure plugin
+.idea/replstate.xml
+
+# SonarLint plugin
+.idea/sonarlint/
+
+# Crashlytics plugin (for Android Studio and IntelliJ)
+com_crashlytics_export_strings.xml
+crashlytics.properties
+crashlytics-build.properties
+fabric.properties
+
+# Editor-based Rest Client
+.idea/httpRequests
+
+# Android studio 3.1+ serialized cache file
+.idea/caches/build_file_checksums.ser
+
+### Intellij+all Patch ###
+# Ignore everything but code style settings and run configurations
+# that are supposed to be shared within teams.
+
+.idea/*
+
+!.idea/codeStyles
+!.idea/runConfigurations
+
+### Linux ###
+*~
+
+# temporary files which can be created if a process still has a handle open of a deleted file
+.fuse_hidden*
+
+# KDE directory preferences
+.directory
+
+# Linux trash folder which might appear on any partition or disk
+.Trash-*
+
+# .nfs files are created when an open file is removed but is still being accessed
+.nfs*
+
+### macOS ###
+# General
+.DS_Store
+.AppleDouble
+.LSOverride
+
+# Icon must end with two \r
+Icon
+
+
+# Thumbnails
+._*
+
+# Files that might appear in the root of a volume
+.DocumentRevisions-V100
+.fseventsd
+.Spotlight-V100
+.TemporaryItems
+.Trashes
+.VolumeIcon.icns
+.com.apple.timemachine.donotpresent
+
+# Directories potentially created on remote AFP share
+.AppleDB
+.AppleDesktop
+Network Trash Folder
+Temporary Items
+.apdisk
+
+### macOS Patch ###
+# iCloud generated files
+*.icloud
+
+### Python ###
+# Byte-compiled / optimized / DLL files
 __pycache__/
-.vscode/
-.idea/
-*.swo
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.nox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+*.py,cover
+.hypothesis/
+.pytest_cache/
+cover/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+db.sqlite3
+db.sqlite3-journal
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+.pybuilder/
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# IPython
+profile_default/
+ipython_config.py
+
+# pyenv
+#   For a library or package, you might want to ignore these files since the code is
+#   intended to run in multiple environments; otherwise, check them in:
+# .python-version
+
+# pipenv
+#   According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
+#   However, in case of collaboration, if having platform-specific dependencies or dependencies
+#   having no cross-platform support, pipenv may install dependencies that don't work, or not
+#   install all needed dependencies.
+#Pipfile.lock
+
+# poetry
+#   Similar to Pipfile.lock, it is generally recommended to include poetry.lock in version control.
+#   This is especially recommended for binary packages to ensure reproducibility, and is more
+#   commonly ignored for libraries.
+#   https://python-poetry.org/docs/basic-usage/#commit-your-poetrylock-file-to-version-control
+#poetry.lock
+
+# pdm
+#   Similar to Pipfile.lock, it is generally recommended to include pdm.lock in version control.
+#pdm.lock
+#   pdm stores project-wide configurations in .pdm.toml, but it is recommended to not include it
+#   in version control.
+#   https://pdm.fming.dev/#use-with-ide
+.pdm.toml
+
+# PEP 582; used by e.g. github.com/David-OConnor/pyflow and github.com/pdm-project/pdm
+__pypackages__/
+
+# Celery stuff
+celerybeat-schedule
+celerybeat.pid
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# Pyre type checker
+.pyre/
+
+# pytype static type analyzer
+.pytype/
+
+# Cython debug symbols
+cython_debug/
+
+# PyCharm
+#  JetBrains specific template is maintained in a separate JetBrains.gitignore that can
+#  be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
+#  and can be added to the global gitignore or merged into this file.  For a more nuclear
+#  option (not recommended) you can uncomment the following to ignore the entire idea folder.
+#.idea/
+
+### Python Patch ###
+# Poetry local configuration file - https://python-poetry.org/docs/configuration/#local-configuration
+poetry.toml
+
+# ruff
+.ruff_cache/
+
+# LSP config files
+pyrightconfig.json
+
+### Vim ###
+# Swap
+[._]*.s[a-v][a-z]
+!*.svg  # comment out if you don't need vector files
+[._]*.sw[a-p]
+[._]s[a-rt-v][a-z]
+[._]ss[a-gi-z]
+[._]sw[a-p]
+
+# Session
+Session.vim
+Sessionx.vim
+
+# Temporary
+.netrwhist
+# Auto-generated tag files
+tags
+# Persistent undo
+[._]*.un~
+
+### VisualStudioCode ###
+.vscode/*
+!.vscode/settings.json
+!.vscode/tasks.json
+!.vscode/launch.json
+!.vscode/extensions.json
+!.vscode/*.code-snippets
+
+# Local History for Visual Studio Code
+.history/
+
+# Built Visual Studio Code Extensions
+*.vsix
+
+### VisualStudioCode Patch ###
+# Ignore all local history of files
+.history
+.ionide
+
+# End of https://www.toptal.com/developers/gitignore/api/vim,bazel,linux,macos,python,intellij+all,visualstudiocode
diff --git a/WORKSPACE b/WORKSPACE
index faeec9a..856b7d1 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -28,6 +28,8 @@ http_archive(
     "https://github.com/apache/brpc/archive/0.9.7.tar.gz"
     ],
     strip_prefix = "brpc-0.9.7",
+    patches = ["//thirdparty/patches:01-fix_dl_sym.patch"],
+    patch_args = ["-p", "1"],
 )
 
 # depend by brpc
diff --git a/config/tn_build.yaml b/config/tn_build.yaml
index 804f6a7..3637ec1 100644
--- a/config/tn_build.yaml
+++ b/config/tn_build.yaml
@@ -8,9 +8,10 @@ dependencies:
   - openmpi==4.1.3
   - openssl==1.1.1t
   - libxcrypt==4.4.28
-  - gcc==10.3.0
-  - gxx==10.3.0
-  - libstdcxx-devel_linux-64==10.3.0
+  - sysroot_linux-64 <2.13 # for running on CentOS 6
+  - gcc >=10.3.0,<11.2 # https://github.com/apache/brpc/issues/1693 fix from brpc 1.3.0
+  - gxx >=10.3.0,<11.2
+  - libstdcxx-devel_linux-64 >=10.3.0,<11.2,!=11.1 # 11.1 do not install libstdc++.so correctly
   - openjdk==8.0.382
   - patch
   - pip
diff --git a/core/utility/mpi_manager.h b/core/utility/mpi_manager.h
index ab852b5..4099efe 100644
--- a/core/utility/mpi_manager.h
+++ b/core/utility/mpi_manager.h
@@ -17,6 +17,7 @@
 
 #include <vector>
 #include <string>
+#include <cstdint>
 #include <mpi.h>
 
 namespace tensornet {
diff --git a/thirdparty/patches/01-fix_dl_sym.patch b/thirdparty/patches/01-fix_dl_sym.patch
new file mode 100644
index 0000000..c472a58
--- /dev/null
+++ b/thirdparty/patches/01-fix_dl_sym.patch
@@ -0,0 +1,39 @@
+From ded02c195096a256752124241d3e72cf9e7cc339 Mon Sep 17 00:00:00 2001
+From: wangweibing <wangweibing@baidu.com>
+Date: Tue, 7 Jun 2022 14:57:45 +0800
+Subject: [PATCH] Fix _dl_sym undefined reference
+
+---
+ src/bthread/mutex.cpp | 12 +++++++++---
+ 1 file changed, 9 insertions(+), 3 deletions(-)
+
+diff --git a/src/bthread/mutex.cpp b/src/bthread/mutex.cpp
+index 441bc6c872..e044eae243 100644
+--- a/src/bthread/mutex.cpp
++++ b/src/bthread/mutex.cpp
+@@ -44,7 +44,7 @@
+ #include "bthread/log.h"
+ 
+ extern "C" {
+-extern void* _dl_sym(void* handle, const char* symbol, void* caller);
++extern void* __attribute__((weak)) _dl_sym(void* handle, const char* symbol, void* caller);
+ }
+ 
+ namespace bthread {
+@@ -408,8 +408,14 @@ static void init_sys_mutex_lock() {
+ #if defined(OS_LINUX)
+     // TODO: may need dlvsym when GLIBC has multiple versions of a same symbol.
+     // http://blog.fesnel.com/blog/2009/08/25/preloading-with-multiple-symbol-versions
+-    sys_pthread_mutex_lock = (MutexOp)_dl_sym(RTLD_NEXT, "pthread_mutex_lock", (void*)init_sys_mutex_lock);
+-    sys_pthread_mutex_unlock = (MutexOp)_dl_sym(RTLD_NEXT, "pthread_mutex_unlock", (void*)init_sys_mutex_lock);
++    if (_dl_sym) {
++        sys_pthread_mutex_lock = (MutexOp)_dl_sym(RTLD_NEXT, "pthread_mutex_lock", (void*)init_sys_mutex_lock);
++        sys_pthread_mutex_unlock = (MutexOp)_dl_sym(RTLD_NEXT, "pthread_mutex_unlock", (void*)init_sys_mutex_lock);
++    } else {
++        // _dl_sym may be undefined reference in some system, fallback to dlsym
++        sys_pthread_mutex_lock = (MutexOp)dlsym(RTLD_NEXT, "pthread_mutex_lock");
++        sys_pthread_mutex_unlock = (MutexOp)dlsym(RTLD_NEXT, "pthread_mutex_unlock");
++    }
+ #elif defined(OS_MACOSX)
+     // TODO: look workaround for dlsym on mac
+     sys_pthread_mutex_lock = (MutexOp)dlsym(RTLD_NEXT, "pthread_mutex_lock");
diff --git a/thirdparty/patches/BUILD b/thirdparty/patches/BUILD
new file mode 100644
index 0000000..ac88b82
--- /dev/null
+++ b/thirdparty/patches/BUILD
@@ -0,0 +1 @@
+exports_files(["*.patch"])