板凳——————————————————c++(12)

// P 201 professional c++ 4th edition
#include
#include
#include
#include
class SpreadsheetCell
{
public://p202
virtual ~SpreadsheetCell() = default;
virtual void set(std::string_view inString) = 0 ;
virtual std::string getString() const = 0 ;
};

class StringSpreadsheetCell : public SpreadsheetCell{
public:
virtual void set(std::string_view inString) override;
virtual std::string getString() const override;

private:
std::optional mValue;

};

void StringSpreadsheetCell::set(std::string_view inString){
mValue = inString;
}

std::string StringSpreadsheetCell::getString() const{
return mValue.value_or("");
}

class DoubleSpreadsheetCell : public SpreadsheetCell{
public:
virtual void set(double inDouble) ;
virtual void set(std::string_view inString) override;
virtual std::string getString() const override;
//virtual double stringToDouble(std::string_view inString) const override;//8-2
private:
static std::string doubleToString (double inValue);
static double stringToDouble(std::string_view inValue);
std::optional mValue;

};

void DoubleSpreadsheetCell::set(double inDouble){
mValue = inDouble;
}

void DoubleSpreadsheetCell::set(std::string_view inString){
mValue = stringToDouble(inString);
}

std::string DoubleSpreadsheetCell::getString() const{
return (mValue.has_value() ? doubleToString(mValue.value()) : “”);
}

std::string DoubleSpreadsheetCell::doubleToString(double inValue) //8-2
{
return std::__cxx11::to_string(inValue);
}

double DoubleSpreadsheetCell::stringToDouble(std::string_view inString)
{
return strtod(inString.data(), nullptr);
}

int main()
{

return 0;

}
2020年05月05日 05时50分07秒
wannian07@wannian07-PC:~$ g++ -std=c++17 -o c17 c17.cpp
wannian07@wannian07-PC:~$ ./c17
./c17: /lib/x86_64-linux-gnu/libstdc++.so.6: version `GLIBCXX_3.4.26’ not found (required by ./c17)

wannian07@wannian07-PC:~/Desktop$ su - root
密码：
root@wannian07-PC:~# strings /usr/lib/x86_64-linux-gnu/libstdc++.so.6 | grep GLIBCXX
GLIBCXX_3.4
GLIBCXX_3.4.1
GLIBCXX_3.4.2
GLIBCXX_3.4.3
GLIBCXX_3.4.4
GLIBCXX_3.4.5
GLIBCXX_3.4.6
GLIBCXX_3.4.7
GLIBCXX_3.4.8
GLIBCXX_3.4.9
GLIBCXX_3.4.10
GLIBCXX_3.4.11
GLIBCXX_3.4.12
GLIBCXX_3.4.13
GLIBCXX_3.4.14
GLIBCXX_3.4.15
GLIBCXX_3.4.16
GLIBCXX_3.4.17
GLIBCXX_3.4.18
GLIBCXX_3.4.19
GLIBCXX_3.4.20
GLIBCXX_3.4.21
GLIBCXX_3.4.22
GLIBCXX_DEBUG_MESSAGE_LENGTH
root@wannian07-PC:~# sudo apt-get install libstdc++6
正在读取软件包列表… 完成
正在分析软件包的依赖关系树
正在读取状态信息… 完成
libstdc++6 已经是最新版 (6.3.0-18+deb9u1)。
下列软件包是自动安装的并且现在不需要了：
dconf-cli gir1.2-ibus-1.0
使用’sudo apt autoremove’来卸载它(它们)。
升级了 0 个软件包，新安装了 0 个软件包，要卸载 0 个软件包，有 0 个软件包未被升级。

第一个反应是升级9.3.0. 软件都下载好了
但是还是有顾虑的, 万一安装不成功呢?
第二, 9.2.0 安装从早8:00~~16:00 求稳
第三, 有一个笨办法就是找个现成的libstdc++.so.6.0.27

把它拷到cp /home/wannian07/temp_gcc9.2/x86_64-pc-linux-gnu/libstdc+±v3/src/.libs/libstdc++.so.6.0.27 /usr/lib/x86_64-linux-gnu/下

删掉libstdc++.so.6这个软连接. rm -rf libstdc++.so.6

建立新连接ln -s libstdc++.so.6.0.27 libstdc++.so.6

在看一眼:strings /usr/lib64/libstdc++.so.6 | grep GLIBC

cp ./i686-pc-linux-gnu/libstdc+±v3/src/.libs/libstdc++.so.6.0.27 /usr/lib 64位系统可能在/usr/lib64下
/home/wannian07/temp_gcc9.2/x86_64-pc-linux-gnu/libstdc+±v3/src/.libs/libstdc++.so.6.0.27

建议从电脑里搜索 libstdc++.so*
/usr/local/gcc-9.3/lib64/libstdc++.so.6.0.28
/home/wannian07/temp_gcc9.2/x86_64-pc-linux-gnu/libstdc+±v3/src/.libs/libstdc++.so.6.0.27

wannian07@wannian07-PC:~/Desktop$ su - root
密码：
root@wannian07-PC:~# cp /usr/local/gcc-9.3/lib64/libstdc++.so.6.0.28 /usr/lib/x86_64-linux-gnu/
root@wannian07-PC:~# cd /lib/x86_64-linux-gnu/
root@wannian07-PC:/lib/x86_64-linux-gnu# find libstdc++.so*
libstdc++.so.6
libstdc++.so.6.0.22
libstdc++.so.6.0.27
libstdc++.so.6.0.28
root@wannian07-PC:/lib/x86_64-linux-gnu# rm -f libstdc++.so.6
root@wannian07-PC:/lib/x86_64-linux-gnu# ln -s libstdc++.so.6.0.28 libstdc++.so.6
root@wannian07-PC:/lib/x86_64-linux-gnu# strings /usr/lib/x86_64-linux-gnu/libstdc++.so.6 | grep GLIBCXX
GLIBCXX_3.4
GLIBCXX_3.4.1
GLIBCXX_3.4.2
GLIBCXX_3.4.3
GLIBCXX_3.4.4
GLIBCXX_3.4.5
GLIBCXX_3.4.6
GLIBCXX_3.4.7
GLIBCXX_3.4.8
GLIBCXX_3.4.9
GLIBCXX_3.4.10
GLIBCXX_3.4.11
GLIBCXX_3.4.12
GLIBCXX_3.4.13
GLIBCXX_3.4.14
GLIBCXX_3.4.15
GLIBCXX_3.4.16
GLIBCXX_3.4.17
GLIBCXX_3.4.18
GLIBCXX_3.4.19
GLIBCXX_3.4.20
GLIBCXX_3.4.21
GLIBCXX_3.4.22
GLIBCXX_3.4.23
GLIBCXX_3.4.24
GLIBCXX_3.4.25
GLIBCXX_3.4.26
GLIBCXX_3.4.27
GLIBCXX_3.4.28
GLIBCXX_DEBUG_MESSAGE_LENGTH
_ZNKSt14basic_ifstreamIcSt11char_traitsIcEE7is_openEv@GLIBCXX_3.4
_ZNSt13basic_istreamIwSt11char_traitsIwEE6ignoreEv@@GLIBCXX_3.4.5
_ZNKSbIwSt11char_traitsIwESaIwEE11_M_disjunctEPKw@GLIBCXX_3.4
_ZNKSt14basic_ifstreamIwSt11char_traitsIwEE7is_openEv@@GLIBCXX_3.4.5
GLIBCXX_3.4.21
GLIBCXX_3.4.9
_ZSt10adopt_lock@@GLIBCXX_3.4.11
GLIBCXX_3.4.10
GLIBCXX_3.4.16
GLIBCXX_3.4.1
_ZNSt19istreambuf_iteratorIcSt11char_traitsIcEEppEv@GLIBCXX_3.4
GLIBCXX_3.4.28
_ZNSs7_M_copyEPcPKcm@GLIBCXX_3.4
GLIBCXX_3.4.25
_ZNSt19istreambuf_iteratorIcSt11char_traitsIcEEppEv@@GLIBCXX_3.4.5
_ZNSs7_M_moveEPcPKcm@@GLIBCXX_3.4.5
_ZNKSt13basic_fstreamIwSt11char_traitsIwEE7is_openEv@GLIBCXX_3.4
_ZNKSt13basic_fstreamIcSt11char_traitsIcEE7is_openEv@GLIBCXX_3.4
_ZNSbIwSt11char_traitsIwESaIwEE4_Rep26_M_set_length_and_sharableEm@@GLIBCXX_3.4.5
_ZNSs4_Rep26_M_set_length_and_sharableEm@GLIBCXX_3.4
_ZSt10defer_lock@@GLIBCXX_3.4.11
ZN10__gnu_norm15_List_node_base4swapERS0_S1@@GLIBCXX_3.4
_ZNSs9_M_assignEPcmc@@GLIBCXX_3.4.5
_ZNKSbIwSt11char_traitsIwESaIwEE15_M_check_lengthEmmPKc@@GLIBCXX_3.4.5
_ZNKSt14basic_ifstreamIcSt11char_traitsIcEE7is_openEv@@GLIBCXX_3.4.5
_ZNSbIwSt11char_traitsIwESaIwEE7_M_moveEPwPKwm@GLIBCXX_3.4
GLIBCXX_3.4.24
_ZNVSt9__atomic011atomic_flag12test_and_setESt12memory_order@@GLIBCXX_3.4.11
GLIBCXX_3.4.20
ZNSt11char_traitsIwE2eqERKwS2@@GLIBCXX_3.4.5
GLIBCXX_3.4.12
_ZNSi6ignoreEv@@GLIBCXX_3.4.5
GLIBCXX_3.4.2
ZNSt11char_traitsIcE2eqERKcS2@@GLIBCXX_3.4.5
GLIBCXX_3.4.6
GLIBCXX_3.4.15
_ZNKSt13basic_fstreamIcSt11char_traitsIcEE7is_openEv@@GLIBCXX_3.4.5
_ZNSs9_M_assignEPcmc@GLIBCXX_3.4
GLIBCXX_3.4.19
_ZNKSt14basic_ofstreamIwSt11char_traitsIwEE7is_openEv@GLIBCXX_3.4
_ZNSt19istreambuf_iteratorIwSt11char_traitsIwEEppEv@GLIBCXX_3.4
GLIBCXX_3.4.27
_ZN10__gnu_norm15_List_node_base7reverseEv@@GLIBCXX_3.4
ZN10__gnu_norm15_List_node_base4hookEPS0@@GLIBCXX_3.4
ZNSt11char_traitsIwE2eqERKwS2@GLIBCXX_3.4
_ZNSbIwSt11char_traitsIwESaIwEE7_M_copyEPwPKwm@GLIBCXX_3.4
_ZNSbIwSt11char_traitsIwESaIwEE7_M_copyEPwPKwm@@GLIBCXX_3.4.5
GLIBCXX_3.4.23
GLIBCXX_3.4.3
GLIBCXX_3.4.7
_ZNSi6ignoreEl@@GLIBCXX_3.4.5
_ZNKSbIwSt11char_traitsIwESaIwEE11_M_disjunctEPKw@@GLIBCXX_3.4.5
_ZNSt13basic_istreamIwSt11char_traitsIwEE6ignoreEv@GLIBCXX_3.4
_ZNKSt13basic_fstreamIwSt11char_traitsIwEE7is_openEv@@GLIBCXX_3.4.5
_ZNSbIwSt11char_traitsIwESaIwEE7_M_moveEPwPKwm@@GLIBCXX_3.4.5
GLIBCXX_3.4.18
_ZNSbIwSt11char_traitsIwESaIwEE4_Rep26_M_set_length_and_sharableEm@GLIBCXX_3.4
_ZNSt13basic_istreamIwSt11char_traitsIwEE6ignoreEl@@GLIBCXX_3.4.5
_ZSt15future_category@@GLIBCXX_3.4.14
_ZNSi6ignoreEl@GLIBCXX_3.4
ZNSt11char_traitsIcE2eqERKcS2@GLIBCXX_3.4
_ZNKSs15_M_check_lengthEmmPKc@GLIBCXX_3.4
ZN10__gnu_norm15_List_node_base8transferEPS0_S1@@GLIBCXX_3.4
_ZNSbIwSt11char_traitsIwESaIwEE9_M_assignEPwmw@GLIBCXX_3.4
_ZNVSt9__atomic011atomic_flag5clearESt12memory_order@@GLIBCXX_3.4.11
_ZNKSt14basic_ofstreamIcSt11char_traitsIcEE7is_openEv@@GLIBCXX_3.4.5
_ZNKSt14basic_ofstreamIcSt11char_traitsIcEE7is_openEv@GLIBCXX_3.4
_ZNSs7_M_moveEPcPKcm@GLIBCXX_3.4
_ZNSt13basic_istreamIwSt11char_traitsIwEE6ignoreEl@GLIBCXX_3.4
_ZNSbIwSt11char_traitsIwESaIwEE9_M_assignEPwmw@@GLIBCXX_3.4.5
_ZNKSbIwSt11char_traitsIwESaIwEE15_M_check_lengthEmmPKc@GLIBCXX_3.4
_ZNKSs11_M_disjunctEPKc@@GLIBCXX_3.4.5
_ZN10__gnu_norm15_List_node_base6unhookEv@@GLIBCXX_3.4
GLIBCXX_3.4.22
_ZNSt19istreambuf_iteratorIwSt11char_traitsIwEEppEv@@GLIBCXX_3.4.5
_ZNSi6ignoreEv@GLIBCXX_3.4
_ZNSs7_M_copyEPcPKcm@@GLIBCXX_3.4.5
GLIBCXX_3.4.8
GLIBCXX_3.4.13
_ZSt11try_to_lock@@GLIBCXX_3.4.11
_ZNKSt14basic_ofstreamIwSt11char_traitsIwEE7is_openEv@@GLIBCXX_3.4.5
GLIBCXX_3.4.17
GLIBCXX_3.4.4
_ZNKSs15_M_check_lengthEmmPKc@@GLIBCXX_3.4.5
_ZNKSt14basic_ifstreamIwSt11char_traitsIwEE7is_openEv@GLIBCXX_3.4
_ZNSs4_Rep26_M_set_length_and_sharableEm@@GLIBCXX_3.4.5
GLIBCXX_3.4.26
_ZNKSs11_M_disjunctEPKc@GLIBCXX_3.4
root@wannian07-PC:/lib/x86_64-linux-gnu#

在回到上面的程序: OK!
wannian07@wannian07-PC:~$ g++ -std=c++17 -o c17 c17.cpp
wannian07@wannian07-PC:~$ ./c17
wannian07@wannian07-PC:~$

附

ubuntu中编译安装gcc 9.3.0

一切都和其他源码安装软件是一样的：

一、下载源代码：

http://ftp.gnu.org/gnu/gcc/gcc-9.3.0/gcc-9.3.0.tar.gz

二、解压文件
　　tar xvf gcc-9.3.0.tar.gz

三、配置安装路径：sudo vim /etc/profile

export PATH="/usr/local/gcc-9.3/bin:$PATH"

四、源码自动配置：
　　cd gcc-9.3.0/

./contrib/download_prerequisites

一定要看到以下类似的结果：

root@wannian07-PC:/home/gcc9.3/gcc-9.3.0# ./contrib/download_prerequisites
2020-05-05 10:49:26 URL: ftp://gcc.gnu.org/pub/gcc/infrastructure/mpfr-3.1.4.tar.bz2 [1279284] -> “./mpfr-3.1.4.tar.bz2” [1]
2020-05-05 10:50:35 URL: ftp://gcc.gnu.org/pub/gcc/infrastructure/mpc-1.0.3.tar.gz [669925] -> “./mpc-1.0.3.tar.gz” [1]
2020-05-05 10:53:04 URL: ftp://gcc.gnu.org/pub/gcc/infrastructure/isl-0.18.tar.bz2 [1658291] -> “./isl-0.18.tar.bz2” [1]
gmp-6.1.0.tar.bz2: 成功
mpfr-3.1.4.tar.bz2: 成功
mpc-1.0.3.tar.gz: 成功
isl-0.18.tar.bz2: 成功
All prerequisites downloaded successfully.
root@wannian07-PC:/home/gcc9.3/gcc-9.3.0#
五、准备编译目录：

cd …

mkdir temp_gcc9.3 && cd temp_gcc9.3

六、设置编译选项，生成make文件：

root@wannian07-PC:/home/wannian07# mkdir temp_gcc9.3 && cd temp_gcc9.3
root@wannian07-PC:/home/gcc9.3/gcc-9.3.0# ./configure --prefix=/usr/local/gcc-9.3 --enable-threads=posix --disable-checking --disable-multilib --enable-bootstrap --enable-languages=c,c++
root@wannian07-PC:/home/gcc9.3/gcc-9.3.0# make //允许多线程，不允许32位等选项

七、自动编译：

make

八、最后安装

sudo make install

九、做个链接：

sudo ln -s /usr/local/gcc-9.3/bin/gcc gcc-9

写个hello world测试下吧。
十 重启动:
　KO!
　root@wannian07-PC:~# gcc -v
使用内建 specs。
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/local/gcc-9.3/libexec/gcc/x86_64-pc-linux-gnu/9.3.0/lto-wrapper
目标：x86_64-pc-linux-gnu
配置为：./configure --prefix=/usr/local/gcc-9.3 --enable-threads=posix --disable-checking --disable-multilib --enable-bootstrap --enable-languages=c,c++
线程模型：posix
gcc 版本 9.3.0 (GCC)
root@wannian07-PC:~# strings /usr/lib/x86_64-linux-gnu/libstdc++.so.6 | grep GLIBCXX
GLIBCXX_3.4
GLIBCXX_3.4.1
GLIBCXX_3.4.2
GLIBCXX_3.4.3
GLIBCXX_3.4.4
GLIBCXX_3.4.5
GLIBCXX_3.4.6
GLIBCXX_3.4.7
GLIBCXX_3.4.8
GLIBCXX_3.4.9
GLIBCXX_3.4.10
GLIBCXX_3.4.11
GLIBCXX_3.4.12
GLIBCXX_3.4.13
GLIBCXX_3.4.14
GLIBCXX_3.4.15
GLIBCXX_3.4.16
GLIBCXX_3.4.17
GLIBCXX_3.4.18
GLIBCXX_3.4.19
GLIBCXX_3.4.20
GLIBCXX_3.4.21
GLIBCXX_3.4.22
GLIBCXX_3.4.23
GLIBCXX_3.4.24
GLIBCXX_3.4.25
GLIBCXX_3.4.26
GLIBCXX_3.4.27
GLIBCXX_DEBUG_MESSAGE_LENGTH
_ZNKSt14basic_ifstreamIcSt11char_traitsIcEE7is_openEv@GLIBCXX_3.4
_ZNSt13basic_istreamIwSt11char_traitsIwEE6ignoreEv@@GLIBCXX_3.4.5
_ZNKSbIwSt11char_traitsIwESaIwEE11_M_disjunctEPKw@GLIBCXX_3.4
_ZNKSt14basic_ifstreamIwSt11char_traitsIwEE7is_openEv@@GLIBCXX_3.4.5
GLIBCXX_3.4.21
GLIBCXX_3.4.9
_ZSt10adopt_lock@@GLIBCXX_3.4.11
GLIBCXX_3.4.10
GLIBCXX_3.4.16
GLIBCXX_3.4.1
_ZNSt19istreambuf_iteratorIcSt11char_traitsIcEEppEv@GLIBCXX_3.4
_ZNSs7_M_copyEPcPKcm@GLIBCXX_3.4
GLIBCXX_3.4.25
_ZNSt19istreambuf_iteratorIcSt11char_traitsIcEEppEv@@GLIBCXX_3.4.5
_ZNSs7_M_moveEPcPKcm@@GLIBCXX_3.4.5
_ZNKSt13basic_fstreamIwSt11char_traitsIwEE7is_openEv@GLIBCXX_3.4
_ZNKSt13basic_fstreamIcSt11char_traitsIcEE7is_openEv@GLIBCXX_3.4
_ZNSbIwSt11char_traitsIwESaIwEE4_Rep26_M_set_length_and_sharableEm@@GLIBCXX_3.4.5
_ZNSs4_Rep26_M_set_length_and_sharableEm@GLIBCXX_3.4
_ZSt10defer_lock@@GLIBCXX_3.4.11
ZN10__gnu_norm15_List_node_base4swapERS0_S1@@GLIBCXX_3.4
_ZNSs9_M_assignEPcmc@@GLIBCXX_3.4.5
_ZNKSbIwSt11char_traitsIwESaIwEE15_M_check_lengthEmmPKc@@GLIBCXX_3.4.5
_ZNKSt14basic_ifstreamIcSt11char_traitsIcEE7is_openEv@@GLIBCXX_3.4.5
_ZNSbIwSt11char_traitsIwESaIwEE7_M_moveEPwPKwm@GLIBCXX_3.4
GLIBCXX_3.4.24
_ZNVSt9__atomic011atomic_flag12test_and_setESt12memory_order@@GLIBCXX_3.4.11
GLIBCXX_3.4.20
ZNSt11char_traitsIwE2eqERKwS2@@GLIBCXX_3.4.5
GLIBCXX_3.4.12
_ZNSi6ignoreEv@@GLIBCXX_3.4.5
GLIBCXX_3.4.2
ZNSt11char_traitsIcE2eqERKcS2@@GLIBCXX_3.4.5
GLIBCXX_3.4.6
GLIBCXX_3.4.15
_ZNKSt13basic_fstreamIcSt11char_traitsIcEE7is_openEv@@GLIBCXX_3.4.5
_ZNSs9_M_assignEPcmc@GLIBCXX_3.4
GLIBCXX_3.4.19
_ZNKSt14basic_ofstreamIwSt11char_traitsIwEE7is_openEv@GLIBCXX_3.4
_ZNSt19istreambuf_iteratorIwSt11char_traitsIwEEppEv@GLIBCXX_3.4
GLIBCXX_3.4.27
_ZN10__gnu_norm15_List_node_base7reverseEv@@GLIBCXX_3.4
ZN10__gnu_norm15_List_node_base4hookEPS0@@GLIBCXX_3.4
ZNSt11char_traitsIwE2eqERKwS2@GLIBCXX_3.4
_ZNSbIwSt11char_traitsIwESaIwEE7_M_copyEPwPKwm@GLIBCXX_3.4
_ZNSbIwSt11char_traitsIwESaIwEE7_M_copyEPwPKwm@@GLIBCXX_3.4.5
GLIBCXX_3.4.23
GLIBCXX_3.4.3
GLIBCXX_3.4.7
_ZNSi6ignoreEl@@GLIBCXX_3.4.5
_ZNKSbIwSt11char_traitsIwESaIwEE11_M_disjunctEPKw@@GLIBCXX_3.4.5
_ZNSt13basic_istreamIwSt11char_traitsIwEE6ignoreEv@GLIBCXX_3.4
_ZNKSt13basic_fstreamIwSt11char_traitsIwEE7is_openEv@@GLIBCXX_3.4.5
_ZNSbIwSt11char_traitsIwESaIwEE7_M_moveEPwPKwm@@GLIBCXX_3.4.5
GLIBCXX_3.4.18
_ZNSbIwSt11char_traitsIwESaIwEE4_Rep26_M_set_length_and_sharableEm@GLIBCXX_3.4
_ZNSt13basic_istreamIwSt11char_traitsIwEE6ignoreEl@@GLIBCXX_3.4.5
_ZSt15future_category@@GLIBCXX_3.4.14
_ZNSi6ignoreEl@GLIBCXX_3.4
ZNSt11char_traitsIcE2eqERKcS2@GLIBCXX_3.4
_ZNKSs15_M_check_lengthEmmPKc@GLIBCXX_3.4
ZN10__gnu_norm15_List_node_base8transferEPS0_S1@@GLIBCXX_3.4
_ZNSbIwSt11char_traitsIwESaIwEE9_M_assignEPwmw@GLIBCXX_3.4
_ZNVSt9__atomic011atomic_flag5clearESt12memory_order@@GLIBCXX_3.4.11
_ZNKSt14basic_ofstreamIcSt11char_traitsIcEE7is_openEv@@GLIBCXX_3.4.5
_ZNKSt14basic_ofstreamIcSt11char_traitsIcEE7is_openEv@GLIBCXX_3.4
_ZNSs7_M_moveEPcPKcm@GLIBCXX_3.4
_ZNSt13basic_istreamIwSt11char_traitsIwEE6ignoreEl@GLIBCXX_3.4
_ZNSbIwSt11char_traitsIwESaIwEE9_M_assignEPwmw@@GLIBCXX_3.4.5
_ZNKSbIwSt11char_traitsIwESaIwEE15_M_check_lengthEmmPKc@GLIBCXX_3.4
_ZNKSs11_M_disjunctEPKc@@GLIBCXX_3.4.5
_ZN10__gnu_norm15_List_node_base6unhookEv@@GLIBCXX_3.4
GLIBCXX_3.4.22
_ZNSt19istreambuf_iteratorIwSt11char_traitsIwEEppEv@@GLIBCXX_3.4.5
_ZNSi6ignoreEv@GLIBCXX_3.4
_ZNSs7_M_copyEPcPKcm@@GLIBCXX_3.4.5
GLIBCXX_3.4.8
GLIBCXX_3.4.13
_ZSt11try_to_lock@@GLIBCXX_3.4.11
_ZNKSt14basic_ofstreamIwSt11char_traitsIwEE7is_openEv@@GLIBCXX_3.4.5
GLIBCXX_3.4.17
GLIBCXX_3.4.4
_ZNKSs15_M_check_lengthEmmPKc@@GLIBCXX_3.4.5
_ZNKSt14basic_ifstreamIwSt11char_traitsIwEE7is_openEv@GLIBCXX_3.4
_ZNSs4_Rep26_M_set_length_and_sharableEm@@GLIBCXX_3.4.5
GLIBCXX_3.4.26
_ZNKSs11_M_disjunctEPKc@GLIBCXX_3.4
root@wannian07-PC:~#

参考安装 ubuntu中编译安装gcc 9.2.0
https://www.cnblogs.com/guochaoxxl/p/11667747.html