Z:gnu-www-ja-gcc-exception-3.1-faq--369684-Note that if you distribute li/en

Note that if you distribute libstdc++ as an independent library, you will need to follow the terms of the GPL when doing so. For example, if you distribute the library itself in object code form, you will need to provide source code to your recipients using one of the methods listed in section 6 of GPLv3. But as long as you are eligible to take advantage of the GCC Runtime Library Exception's permissions for your own program, the GPL's terms do not extend to it.