I hope inquiring in this mailing list is the right thing to do, but if not I apologise.
So let me start with the essentials. The OS I am using is Windows 7 64-bit. I am using Code::Blocks 13.12 with MinGW-w64 (x86_64-4.9.1-posix-seh-rt_v3-rev1). For this particular instance I've used these compiler options: -O2 -std=c++11 -Wextra -Wall -march=amdfam10 -pipe -lm -lstdc++ Now that that's out of the way... I have this: https://sourceforge.net/projects/xorshift-cpp/files/ Yes, it's a lot of code, I know, and it's sort of not commented at all. But anyway, with all those source files, compiling the "main.cpp" is fine... unless I remove the "-O2" flag (i.e. disable compiler optimisation). Then I get the following output: http://pastebin.com/H08qxK84 Long story short: undefined reference to `xorshift_engine<unsigned long long, 64ull, (signed char)-25, (signed char)3, (signed char)49, 8372773778140471301ull>::shift_3' undefined reference to `xorshift_engine<unsigned long long, 64ull, (signed char)-25, (signed char)3, (signed char)49, 8372773778140471301ull>::shift_2' Which makes absolutely no sense, not only because those linker errors don't come up when compiling even with just "-O", but because, in "xorshift.h", three constexprs in the xorshift_engine class are defined like so: static constexpr int_fast8_t shift_1 = a >= 0 ? a : -a; static constexpr int_fast8_t shift_2 = b >= 0 ? b : -b; static constexpr int_fast8_t shift_3 = c >= 0 ? c : -c; yet shift_1 is ok, but shift_2 and shift_3 somehow aren't...? This smells like a bug in the compiler to me, but I am not sure. Can someone please help me? -- Ivo Doko ------------------------------------------------------------------------------ Slashdot TV. Videos for Nerds. Stuff that Matters. http://pubads.g.doubleclick.net/gampad/clk?id=160591471&iu=/4140/ostg.clktrk _______________________________________________ Mingw-w64-public mailing list Mingw-w64-public@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mingw-w64-public
