On 03/11/2015 06:55 PM, Vlad Gheorghiu wrote:
The following code fails to compile under latest cygwin, Windows 7, g++4.9.2. Compiled with g++ -std=c++11 test.cpp. The compiler complains that std::log2 is not a member of std.#include <cmath> #include <iostream> int main() { auto x = std::log2(10); std::cout << x << std::endl; } Verbatim error: g++ -std=c++11 test.cpp test.cpp: In function ‘int main()’: test.cpp:5:11: error: ‘log2’ is not a member of ‘std’ auto x = std::log2(10); ^ test.cpp:5:11: note: suggested alternative: In file included from /usr/lib/gcc/i686-pc-cygwin/4.9.2/include/c++/cmath:44:0, from test.cpp:1: /usr/include/math.h:305:15: note: ‘log2’ extern double log2 _PARAMS((double));
FWIW I get the same error on cygwin64 gcc 4.9.2 but it is fine on: Linux, gcc 4.9.2 (Fedora 21) MinGW, 32 bit, gcc 4.7.0 (Windows 7) MinGW, 64 bit, gcc 4.9.0 (Windows 7) HTH -- Roger Wells, P.E. leidos 221 Third St Newport, RI 02840 401-847-4210 (voice) 401-849-1585 (fax) roger.k.we...@leidos.com -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
