How Can I Determine the Installed libstdc Version on My Linux System?

Determining the Installed Version of the libstdc Library in Linux

Finding the installed version of the libstdc library in Linux is crucial for ensuring compatibility and functionality in C development. Among the various methods proposed, let's explore a comprehensive approach to accurately determine the library version.

Method 1: Using the 'ldconfig' Command

To identify the specific library being used, issue the following command:

$ /sbin/ldconfig -p | grep stdc++
libstdc++.so.6 (libc6) => /usr/lib/libstdc++.so.6

The output provides the full path to the library and its parent library (e.g., libc6 in this example).

Method 2: Inspecting Library Symbols

For libstdc versions 3.4.0 and above, you can retrieve a list of compatible versions using:

$ strings /usr/lib/libstdc++.so.6 | grep LIBCXX
GLIBCXX_3.4
GLIBCXX_3.4.1
GLIBCXX_3.4.2
...

For earlier versions, the symbol GLIBCPP is defined instead.

Method 3: Examining Date Stamps

The library's date stamp is stored in a macro, GLIBCXX or __GLIBCPP__, depending on the version. To print the date stamp, compile and run the following code:

#include <cstdio>

int main(int argc, char* argv[]){
#ifdef __GLIBCPP__
    std::printf("GLIBCPP: %d\n",__GLIBCPP__);
#endif
#ifdef __GLIBCXX__
    std::printf("GLIBCXX: %d\n",__GLIBCXX__);
#endif
   return 0;
}

Conclusion

By utilizing these methods, you can accurately determine the version of the libstdc library installed on your Linux machine. This information is valuable for ensuring compatibility with your code and for troubleshooting library-related issues. Understanding the methods outlined in this article empowers you to effectively manage and maintain your C development environment.

The above is the detailed content of How Can I Determine the Installed libstdc Version on My Linux System?. For more information, please follow other related articles on the PHP Chinese website!