On Mon, 25 Jul 2011, Visar Zejnullahu wrote: > Hi. > > As announced here: > http://sourceware.org/ml/ecos-devel/2011-07/msg00003.html we are working > on a port of Newlib's single precision floating point math library > (float vs double...). > > I know part of the questions should be addressed to the Newlib's mailing > list (which I have done as well), but I am asking help on the Ecos part > of the problems.
Hi Visar, [cut set of Q that I do not have the expertise] > And lastly, about the gamma function - I've used the tests provided > from Newlib, and when I try to compile the test files about this > function, I get the error > ecos/packages/language/c/libm/current/src/double/ieee754-api/w_gamma.c:99: > undefined reference to `signgam'. Can anyone help on this? Look, please, at ecos math.h:160 #ifdef CYGSEM_LIBM_THREAD_SAFE_GAMMA_FUNCTIONS // FIXME: these need to be documented and signgam mentioned as non-ISO // This returns the address of the signgam variable used by the gamma*() and // lgamma*() functions externC int * cyg_libm_get_signgam_p( void ); #define signgam (*cyg_libm_get_signgam_p()) I think you will get it. Also, the next point to look on libm.cdl:125:cdl_option CYGSEM_LIBM_THREAD_SAFE_GAMMA_FUNCTIONS IMHO, the option's description attribute is the very informative. Sergei
