On 18 May 2015 at 09:49, Takumi Shimada <[email protected]> wrote: > Hi, > > I'm working on Cortex-A7 board. > This Cortex-A7 board has FPU. Therefore I tried to remove codes for software > floating point. > It seems to occur on building src/lib/libc. > When I compiled a small code including `vmrs r0,fpscr` with > `arm-none-eabi-gcc -g -Wall -mcpu=cortex-a7 -mfpu=neon -marm > -mthumb-interwork -nostdlib -fno-builtin`, > the compilation was successful. > I'm afraid the compilation of src/lib/libc doesn't use my flags. > > Could you tell me how to fix them?
You need to set the flags either on the command line ./build.sh -F CFLAGS=-mfpu=neon or in the EXTRA_CFLAGS/EXTRA_AFLAGS in the platform.sh file Remove the EXTRA_CPPFLAGS="-U__VFP_FP__" line from the config, that is just to work around the compiler getting things wrong for the soft float target. I think the following is what you need though in platform.sh - seems to build as far as I can see appendvar EXTRA_CFLAGS "-mcpu=cortex-a7 -mfloat-abi=hard" appendvar EXTRA_AFLAGS "-mcpu=cortex-a7 -mfloat-abi=hard" (can you rebase to master, I fixed the argument parsing with spaces as well) Justin
