On Fri, Nov 18, 2011 at 07:19:52AM +0100, Wolfgang Denk wrote:
Dear Marek Vasut,
In message 201111180601.20086.marek.vasut@gmail.com you wrote:
When I make using the following: make CROSS_COMPILE=ppc_85xx- sbc8548_PCI_33_PCIE_config make CROSS_COMPILE=ppc_85xx- OPTFLAGS=-O2 all
I am still having the same undefined reference above. Should I be building with ppc_8xx instead? If yes, why?Thanks,
This appears to be due to you trying to build with OPTFLAGS=-O2. Remove that and see what happens.
That seems to be a bug in the compiler, if you want -O2, try ELDK5.1 (which has newer compiler).
No. He is using CROSS_COMPILE=ppc_85xx- which means ELDK 4.2 or similar. And there is no such compiler problem with any of these. The "-O2" is just inappropriate here.
Regardless of "appropriateness", it shouldn't break with -O2 other than possibly not meeting space constraints.
arch/powerpc/cpu/mpc8xxx/ddr/main.c references fsl_ddr_get_dimm_params() when CONFIG_DDR_SPD and CONFIG_SPD_EEPROM are unset (both are unset on sbc8548). sbc8548 board code does not supply this function. The code is broken. It builds with some toolchains because it seems that nothing in arch/powerpc/cpu/mpc8xxx/ddr/main.c is ever referenced on this board, so it all gets gc-sectioned away. Apparently for some reason that isn't happening properly with -O2 on some toolchains -- but it's not something we should be relying on for anything other than size optimization.
-Scott