Hallo Gunther Am 22.03.09 schriebst Du
> How about using the original C-library of your system together with its > headers? After all the version you are currently using is an "alien" and without changed headers old ompiler and libs do not work, because for C there is no sqrtf and other C99 funcs and many C++ programs get also many errors. i see old libstdc++ contain sqrtf but get many other linker errors. there is also a sqrtf not undef in cmath as many other functions are. When i define sqrtf in math.h then the sqrtf func in libstdc++ is maybe not add and this strange linker error come.but wy it work not correct when i add sqrtf to libc i dont know.only solution below work. only this funcs are undef. // Get rid of those macros defined in <math.h> in lieu of real functions. #undef abs #undef div #undef acos #undef asin #undef atan #undef atan2 #undef ceil #undef cos #undef cosh #undef exp #undef fabs #undef floor #undef fmod #undef frexp #undef ldexp #undef log #undef log10 #undef modf #undef pow #undef sin #undef sinh #undef sqrt #undef tan #undef tanh > Bernd Roesch wrote: >> I see in my c++config.h file >> >> this stand here >> >> /* Define if the compiler/host combination has __builtin_sqrtf. */ >> /* #undef _GLIBCXX_HAVE___BUILTIN_SQRTF */ >> >> I find now a solution that work without change of cmath >> >> when i add in math.h this line then it work.the function can too stand as >> static inline in the math.h file. >> >> #define __builtin_sqrtf sqrtf > > How about using the original C-library of your system together with its > headers? After all the version you are currently using is an "alien" and > doesn't fit for your system despite the fact that it was based on your > systems C-library and its headers. Carefully merging changes back to the > original version would be the better solution. > > Gunther > >>> On Mon, Mar 9, 2009 at 3:59 PM, Gabriel Dos Reis <dosr...@gmail.com> >>> wrote: >>>> On Mon, Mar 9, 2009 at 7:11 AM, Bernd Roesch <nospamn...@web.de> wrote: >>>>> Hello Gabriel >>>> [...] >>>>> You see there is the _ not in.normaly funcs that not find have a _ >>>>> before >>>>> >>>>> To get all work, it seem i need add the same function add in math.h >>>>> and >>>>> in >>>>> the linker >>>>> lib or change cmath file and remove all __builtin_ commands the >>>>> architecture >>>>> not have. >>>> I believe one should convince the middle end to emit libcall >>>> for __builtin_xxx when the target has no builtint support. >>> It of course does. >>> >>> Richard. >> Regards > > > > mfg Bernd
