[root@atlas_host01 mindspore]# bash build.sh -e ascend -V 310
---------------- MindSpore: build start ----------------
start build mindspore project.
-DDEBUG_MODE=off -DBUILD_PATH=/home/mindspore/build/ -DENABLE_INFER=ON -DENABLE_DUMP_PROTO=ON -DENABLE_DUMP_IR=on -DENABLE_PYTHON=on -DENABLE_MINDDATA=ON -DUSE_GLOG=ON -DENABLE_ACL=ON -DENABLE_DEBUGGER=ON
CMake Error at CMakeLists.txt:6 (message):
GCC version 4.8.5 must not be less than 7.3.0

1、重新安装GCC 7.3.0覆盖默认路径/usr相关文件。

2、当前环境GCC 7.3.0版本安装在/usr/local/gcc7.3.0目录下，采用如下方式解决的问题。

3、将/usr/bin/目录下的g++,gcc,c++,cpp重命名，然后创建软连接指向/usr/local/gcc7.3.0/bin目录下对应的g++,gcc,c++,cpp

4、清理build目录下的CMakeCache.txt等文件rm -rf /home/mindspore/build/mindspore/*(注：此步骤相当重要)。

5、然后在mindspore目录下再运行bash build.sh -e ascend -V 310编译

-- Downloading...
dst='/home/mindspore/build/mindspore/_deps/openssl-subbuild/openssl-populate-prefix/src/OpenSSL_1_1_1k.tar.gz'
timeout='none'
inactivity timeout='none'
-- Using src='https://github.com/openssl/openssl/archive/refs/tags/OpenSSL_1_1_1k.tar.gz'
CMake Error at openssl-subbuild/openssl-populate-prefix/src/openssl-populate-stamp/download-openssl-populate.cmake:170 (message):
Each download failed!

error: downloading 'https://github.com/openssl/openssl/archive/refs/tags/OpenSSL_1_1_1k.tar.gz' failed
status_code: 35
status_string: "SSL connect error"

1、通过网址https://github.com/openssl/openssl/archive/refs/tags/OpenSSL_1_1_1k.tar.gz 单独下载源码包。

2、然后将下载的源码包拷贝到/home/mindspore/build/mindspore/_deps/openssl-subbuild/openssl-populate-prefix/src/OpenSSL_1_1_1k.tar.gz，名字与目录下对应文件名保持一致 如这个目录下文件名：OpenSSL_1_1_1k.tar.gz。

3、然后在mindspore目录下再运行bash build.sh -e ascend -V 310编译

4、其他遇到类似问题，参考此方式处理即可(注意拷贝到的路径正确）

-- The C compiler identification is unknown
-- The CXX compiler identification is unknown
CMake Error at CMakeLists.txt:6 (project):
No CMAKE_C_COMPILER could be found.

Tell CMake where to find the compiler by setting either the environment
variable "CC" or the CMake cache entry CMAKE_C_COMPILER to the full path to
the compiler, or to the compiler name if it is in the PATH.

CMake Error at CMakeLists.txt:6 (project):
No CMAKE_CXX_COMPILER could be found.

Tell CMake where to find the compiler by setting either the environment
variable "CXX" or the CMake cache entry CMAKE_CXX_COMPILER to the full path
to the compiler, or to the compiler name if it is in the PATH.

1、设置CC和CXX环境变量

export CC=/usr/local/gcc7.3.0/bin/gcc
export CXX=/usr/local/gcc7.3.0/bin/g++

2、然后在mindspore目录下再运行bash build.sh -e ascend -V 310编译

-- operation system is Linux-4.14.0-115.el7a.0.1.aarch64
-- ACL module is enabled
-- Cache is enabled
Soft dvpp use glog to print message.
Numa include dir is: NUMA_INCLUDE_DIR-NOTFOUND
Numa library is: NUMA_LIBRARY-NOTFOUND
-- Could NOT find NUMA (missing: NUMA_INCLUDE_DIR NUMA_LIBRARY)

1、执行sudo yum install numactl-devel 安装numa相关的包(或者：sudo apt-get install libnuma-dev)。

2、然后在mindspore目录下再运行bash build.sh -e ascend -V 310编译

-- Configuring done
CMake Error: The following variables are used in this project, but they are set to NOTFOUND.
Please set them or make sure they are set and tested correctly in the CMake files:
gmpxx_LIB
linked by target "mindspore" in directory /home/mindspore/mindspore/ccsrc

1、编译安装gmp前，执行configure时需要增加参数--enable-cxx，即./configure --enable-cxx，然后再make&&make install。

2、然后在mindspore目录下再运行bash build.sh -e ascend -V 310编译