/gcc/defaults.h:126:24: 警告：invalid suffix on literal; C++11 requires a space between literal and string macro [-Wliteral-suffix]

This warning indicates that there is an issue with the syntax used in the code. Specifically, the warning is indicating that there is an invalid suffix on a literal in the code. The C 11 standard requires that there be a space between a literal and a string macro. This warning is telling you that there is no space between the literal and the string macro in the code, which is not compliant with the C 11 standard. To fix this warning, you should add a space between the literal and the string macro in the code.