From da1d6ca49c9b6a54527ceaa467a7d77acb50532a Mon Sep 17 00:00:00 2001
From: yewuya <yewuya0206@gmail.com>
Date: Thu, 28 Jan 2021 15:16:08 +0800
Subject: [PATCH] =?UTF-8?q?=E6=9B=B4=E6=96=B0=E5=88=87=E6=8D=A2cmake?=
 =?UTF-8?q?=E5=92=8Cgcc=E7=89=88=E6=9C=AC?=
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 切换cmake和gcc版本.md | 40 ++++++++++++++++++++++++++++++++++++++++
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 create mode 100644 切换cmake和gcc版本.md

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+* 用于记录日常工作中遇到的问题和解决方法
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diff --git a/切换cmake和gcc版本.md b/切换cmake和gcc版本.md
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+# 切换cmake和gcc版本
+
+### 切换cmake版本
+
+```shell
+sudo gedit ~/.bashrc
+```
+
+在文件的末尾加上
+
+```
+export CMAKE_HOME=/home/sdu/sxq/tools/cmake-3.18.4-Linux-x86_64/bin
+export PATH=$CMAKE_HOME:$PATH
+```
+
+CMAKE_HOME后面的路径为下载解压后的cmake的bin路径
+
+### 切换GCC版本
+
+安装其他版本的gcc，其中7为版本号
+
+```shell
+sudo apt-get install -y gcc-7 g++-7
+```
+
+查看已安装的版本
+
+```sh
+ls /usr/bin/gcc*
+```
+
+版本切换
+
+```sh
+sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-5 20 --slave /usr/bin/g++ g++ /usr/bin/g++-5
+sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-7 10 --slave /usr/bin/g++ g++ /usr/bin/g++-7
+sudo update-alternatives --config gcc
+```
+
+输入数字选择版本
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