Re[4]: Newlib cross-compiling issue

[Alexander Kurakin via newlib]

Thanks, it works!

It would be great to have this info in --help.


-- 
Alexander Kurakin

>Среда,  4 января 2017, 23:31 +03:00 от Jeff Johnston <jjohnstn@redhat.com>:
>
>Hi Alexander,
>
>Newlib doesn't process the --with-cpu, --with-fpu, --with-float, and --with-mode
>options in its configure.
>
>To add specific newlib target options, you can do so when invoking make:
>
>make all-target-newlib CFLAGS_FOR_TARGET="-mcpu=cortex-m4 -mfpu=fpv4-sp-d16 -mthumb ... 
>
>-- Jeff J.
>
>----- Original Message -----
>> Hi, Jeff! Thanks for reply!
>> 
>> Have looked now, but even with:
>> 
>> ./configure \
>>  --target=arm-none-eabi \
>>  --with-cpu=cortex-m4 \
>>  --with-fpu=fpv4-sp-d16 \
>>  --with-float=hard \
>>  --with-mode=thumb \
>> ...
>> 
>> I don't see something about cpu, arch, etc. in build log.
>> 
>> Typical call to compiler is:
>> arm-none-eabi-gcc -B./arm-none-eabi/newlib/ -isystem
>> ./arm-none-eabi/newlib/targ-include -isystem
>> /home/sasha/1/newlib-2.1.0/newlib/libc/include
>> -B./arm-none-eabi/libgloss/arm -L./arm-none-eabi/libgloss/libnosys
>> -L/home/sasha/1/newlib-2.1.0/libgloss/arm -DPACKAGE_NAME=\"newlib\"
>> -DPACKAGE_TARNAME=\"newlib\" -DPACKAGE_VERSION=\"2.1.0\"
>> -DPACKAGE_STRING=\"newlib\ 2.1.0\" -DPACKAGE_BUGREPORT=\"\"
>> -DPACKAGE_URL=\"\" -I.
>> -I../../../../../../newlib-2.1.0/newlib/libm/machine/arm -I
>> ../../../../../../newlib-2.1.0/newlib/libm/machine/arm/../../../../newlib/libm/common
>> -D__SINGLE_THREAD__ -D__NO_SYSCALLS__ -DNO_FLOATING_POINT -fno-builtin -g
>> -O2 -c -o lib_a-s_floor.o `test -f 's_floor.c' || echo
>> '../../../../../../newlib-2.1.0/newlib/libm/machine/arm/'`s_floor.c
>> 
>> Thanks!
>> 
>> 
>> --
>> Alexander Kurakin
>> 
>> >Пятница, 16 декабря 2016, 1:52 +03:00 от Jeff Johnston
>> >< jjohnstn@redhat.com >:
>> >
>> >Hi Alexander,
>> >
>> >Have you looked at:
>> > https://istarc.wordpress.com/2014/07/21/stm32f4-build-your-toolchain-from-scratch/
>> >?
>> >
>> >-- Jeff J.
>> >
>> >----- Original Message -----
>> >> Good day!
>> >> 
>> >> I'm trying to compile Newlib for STM32F4DISCOVERY. My system is Ubuntu
>> >> 14.04
>> >> x86_64, my toolchain is ARM GCC Embedded toolchain [1] (so compiler is
>> >> arm-none-eabi-gcc).
>> >> 
>> >> How do I configure and compile? Show me a command, please?
>> >> 
>> >> (Sure) I've done some actions but they are all unsuccessful. Most often
>> >> cases
>> >> (while playing with --target, --host, --build) are:
>> >> *  unrecognized target machine,
>> >> *  host compiler is used instead of target while "compiler checking" (and
>> >> it
>> >> doesn't recognize ARM-specific options),
>> >> *  (target compiler is used and) executable format error.
>> >> 
>> >> CFLAGS I add: -DPREFER_SIZE_OVER_SPEED -mfloat-abi=softfp -mcpu=cortex-m4
>> >> -mthumb
>> >> Switches I add: --disable-libquadmath --disable-libquadmath-support
>> >> --disable-libstdcxx --disable-newlib-fvwrite-in-streamio
>> >> --disable-newlib-fseek-optimization --disable-newlib-wide-orient
>> >> --disable-newlib-unbuf-stream-opt --disable-multilib
>> >> --disable-newlib-multithread --disable-newlib-io-float
>> >> --disable-newlib-supplied-syscalls
>> >> 
>> >> Thanks!
>> >> 
>> >> --
>> >> Alexander Kurakin
>> 
>>