https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80289
--- Comment #2 from Damien GERARD <damien at iwi dot me> --- Seems to be a regression :) $ /usr/bin/g++ --version [61455007] g++ (GCC) 4.8.5 20150623 (Red Hat 4.8.5-11) $ /usr/bin/g++ -std=c++11 -W -Wall /tmp/constexpr-test.cpp && ./a.out [61455007] /tmp/constexpr-test.cpp:3:22: error: redefinition of ‘constexpr const char text1 []’ constexpr char text1[] = "hello world"; ^ /tmp/constexpr-test.cpp:2:16: error: ‘constexpr const char text1 [12]’ previously defined here constexpr char text1[] = "hello world"; ^ /tmp/constexpr-test.cpp:4:22: error: redefinition of ‘constexpr const char text1 []’ constexpr char text1[] = "hello world"; ^ /tmp/constexpr-test.cpp:2:16: error: ‘constexpr const char text1 [12]’ previously defined here constexpr char text1[] = "hello world";