http://bugzilla.opensuse.org/show_bug.cgi?id=1056783 Bug ID: 1056783 Summary: GCC 6 C++: std::isnan fails to compile with cmath Classification: openSUSE Product: openSUSE Tumbleweed Version: Current Hardware: Other OS: Other Status: NEW Severity: Normal Priority: P5 - None Component: Development Assignee: bnc-team-screening@forge.provo.novell.com Reporter: qantas94heavy@gmail.com QA Contact: qa-bugs@suse.de Found By: --- Blocker: --- The following C++ file fails to build with GCC 6: #include <cmath> #include <iostream> int main(int argc, char *argv[]) { double num = 0.0; std::cout << std::isnan(num) << "\n"; return 0; } This throws the following compile time error:

test.cpp: In function ‘int main(int, char**)’: test.cpp:7:16: error: ‘__builtin_isnan’ is not a member of ‘std’ std::cout << std::isnan(num) << "\n"; ^~~ test.cpp:7:16: note: suggested alternative: <built-in>: note: ‘__builtin_isnan’

Is that meant to happen? It builds properly with GCC 7. Build command: g++-6 -O2 -Wall -g test.cpp -- You are receiving this mail because: You are on the CC list for the bug.