a lot of C++11 functions don't work

[Fancy2209]

std::to_string
std::strtof
std::strtold
std::strtoull
std::strtoll
std::snprintf
std::round
Are all part of C++11, who GCC 7.2.0 should support, yet they all throw when used

[Fewnity]

You already know but for other people, you can use this version of the sdk, you will be able to use more modern functions:

https://github.com/ps3aqua/ps3toolchain
https://github.com/ps3aqua/PSL1GHT