# UDM 编译安装

## 硬件配置需求 

以下为参考配置：

- 18.04.1-Ubuntu SMP x86 64 GNU/Linux
- 建议 4C/8G     

## 部署教程 

```bash
git clone http://git.opensource5g.org/openxg/udm.git

# 进入目录
cd SimpleUDM && mkdir build && cd build && cmake ..

# 编译
sudo make 

# 运行 UDM
sudo ./udm/build/udm-api-server
```

## 问题

问题 1: `fatal error: pistache/http.h: No such file or directory`

```bash
git clone https://github.com/oktal/pistache.git
cd pistache
mkdir build
cd build
cmake -G "Unix Makefiles" -DCMAKE_BUILD_TYPE=Release ..
make
sudo make install
```

问题 2: `fatal error: nlohmann/json.hpp: No such file or directory`

```bash
git clone https://github.com/nlohmann/json.git
mkdir build
cd build
cmake ..
make
make install
```

问题 3:
```
/usr/local/include/pistache/http_headers.h:38:24: error: no matching
  function for call to ‘equal(std::__cxx11::basic_string<char>::const_iterator,
  std::__cxx11::basic_string<char>::const_iterator,
  std::__cxx11::basic_string<char>::const_iterator,
  std::__cxx11::basic_string<char>::const_iterator,
  Pistache::Http::Header::LowercaseEqual::operator()(const string&, const
  string&) const::<lambda(const char&, const char&)>)'});
```

```
# 原因是由于使用了旧版本 C++ 编译环境，需要修改 udm/CMakeLists.txt 中：
# set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -pg -g3" )
# ->
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++14 -pg -g3" )
```

issue 链接：`The Pistache must be compiled under C++14 , it seems you are using older version of C++`，https://github.com/pistacheio/pistache/issues/664