I am using Centos 6.7 and have installed the devtools-3 distribution and "enabled" it to make gcc 4.9.2 the default. A simple C++ program that uses regex will compile , but does not link.
// regex_search example
#include <iostream>
#include <string>
#include <regex>
int main()
{
std::string s("this subject has a submarine as a subsequence");
std::smatch m;
std::regex e("\\b(sub)([^ ]*)"); // matches words beginning by "sub"
std::cout << "Target sequence: " << s << std::endl;
std::cout << "Regular expression: /\\b(sub)([^ ]*)/" << std::endl;
std::cout << "The following matches and submatches were found:" << std::endl;
while (std::regex_search(s, m, e)) {
for (auto x : m) std::cout << x << " ";
std::cout << std::endl;
s = m.suffix().str();
}
return 0;
}