Hello Felipe, On Sun, Nov 25, 2018 at 02:42:10PM -0500, Felipe GM wrote: > Currently I am developing for a MPC5777 board, with e200z7 cores. Most > of the things are going well, but I am stuck with a problem that is > really annoying me already. I am trying to use floating point operations > on portions of my code, using the embedded hardware support. My > toolchain is GCC 6.3 (powerpc-gcc, although I have tried with 7.3 and > 8.2 too), for which I am using the following flags: GCC 6 is no longer maintained. GCC 8 powerpc*-* does not support SPE anymore (you need to configure for powerpc*-*spe* instead; you probably want that for GCC 6 and GCC 7 as well). > |ASFLAGS_BASE =-g -a32 -mbooke -me500 --fatal-warnings ARCH_FLAGS > =-mpowerpc-gpopt -mfprnd -misel -m32 -mhard-float-mabi=spe -mmfpgpr > -mfloat-gprs=single| -mpowerpc-gpopt, -mfprnd, -mmfpgpr, and -mhard-float do not make sense for your target. > Please notice the|-mfloat-gprs=single|flag. That is the one that is > giving problems. > > When I use|-mfloat-gprs=single|, I am not able to compile things > properly, as some functions are not implemented: > > |undefined reference to `__extendsfdf2`,undefined reference to > `__adddf3`,undefined reference to `__divdf3`,| > > - among others. That works fine for me (those functions are in libgcc.a). Please open a PR for GCC 7 (and GCC 8). Segher
