On 02/19/2016 08:24 PM, Jonathan Wakely wrote:
On 20/02/16 02:07 +0000, Jonathan Wakely wrote:The next problem is that gnulib defines: inline int signbit (float f) { return _gl_cxx_signbitf (f); } inline int signbit (double d) { return _gl_cxx_signbitd (d); } inline int signbit (long double l) { return _gl_cxx_signbitl (l); } GCC 6 provides a standard-conforming <math.h> which defines the same signbit overloads (as required by C++11 and C++14). So the gnulib header is incompatible with any conforming C++11 implementation.Here's a patch for Octave which hacks around the above problem in gnulib and then fixes Octave to include gnulib headers explicitly, instead of assuming they'll get found by GCC's std::lib. I haven't waited for octave to finish building (it's after 3am here) but if other files fail just #include <libgnu/math.h> or #include <libgnu/stdlib.h> and it should work. The gnulib change is a hack, a proper fix would only skip the signbit overloads for __cplusplus >= 201103L, but would also make sure to #undef signbit if there's an earlier #define signbit 1. Maybe that should be done by defining @GNULIB_SIGNBIT@ to something different.
Jonathan - Thank you for all your help with this. -- Orion Poplawski Technical Manager 303-415-9701 x222 NWRA/CoRA Division FAX: 303-415-9702 3380 Mitchell Lane orion@xxxxxxxxxxxxx Boulder, CO 80301 http://www.cora.nwra.com -- devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxxx http://lists.fedoraproject.org/admin/lists/devel@xxxxxxxxxxxxxxxxxxxxxxx
