[ell-i-developers] Re: Ellduino Emulator: Fixing issues for Linux (Ubuntu 12.04 LTS)
- From: Pekka Nikander <pekka.nikander@xxxxxx>
- To: ell-i-developers@xxxxxxxxxxxxx
- Date: Mon, 17 Feb 2014 06:55:15 +0200
>> As Arduino is moving to arm-gcc 4.8.3 for Arduino Due, and we will be moving
>> to arm-gcc 4.8 for our board-native binaries, for the emulator we must match
>> that with an i386-gcc 4.8.x. Or, actually, i386-gcc 4.7.x is enough. ...
>> Hence, you have to install gcc 4.8.3-latest (or 4.7.latest) as a native
>> compiler to your Linux, and compile the emulator with that.
>
> I had been confused with the compilers that we are using separately for board
> (embedded) and
> for emulator (native Linux compiler). You were right, I was using wrong
> compiler for emulator (arm-gcc same as I used for board).
>
> Now my path contains native gcc-4.7 g++-4.7: you may see lines below from CMD
> linux
Excellent that we got that fixed so easily!
>> I tried building the gcc-4.8.x from source, but its not ready yet and seems
>> to have dependencies and configuration issues that might need to be fixed
>> manually and may need quit advanced level unix/linux shell/scripting
>> knowledge. Luckily, I found the test-repositories from Ubuntu official
>> websites and installed and configured easily the packages gcc&g++ version
>> 4.7 as instructed by them in the website.
Good to know! If you write a Wiki page of this, it would be good to place the
links directly there.
> g++: error: unrecognized command line option ‘-mthumb’
>
> When I remove -mthumb from platform.txt file (compiler.cflags.target=
> -mcpu={build.mcu} -mthumb),
That's the right fix, IIRC. Eero had the same problem before and fixed it, but
somehow the fix got lost.
> g++ -c -std=c++11 -g -Os -Wall -ffunction-sections -fdata-sections
> -fno-common -nostdlib -DF_CPU=48000000L -DARDUINO=1.5.4
> -DELLI_STM32F051_ELLDUINO -DARDUINO_ARCH_STM32 -DEMULATOR -D__STM32F051__
> -Dmain=emulated_main -I../emulator/inc -I../cores/arduelli
> -I../system/stm32/inc -I../system/stm32/CMSIS/Include -I../variants/ellduino
> -c -o system_init.o ../system/stm32/src/system_init.c
> ../system/stm32/src/system_init.c: In function ‘void SystemInitPeripherals()’:
> ../system/stm32/src/system_init.c:113:50: error: cast from ‘const
> SystemInitRecordArray*’ to ‘uint32_t {aka unsigned int}’ loses precision
> [-fpermissive]
Now we are in real business! This is the kind of problems that I'm expecting.
> Are these problems arising because of MAC related configurations for GCC or
> due to MAC specific code? Or may be I am using 64-bit system and code runs on
> 32-bit system ... In this particular case, what do you suggest?
I think you may be using a 64-bit compiler. Please try to add -m32 back to the
command line and see what happens. Maybe also -march=i386. It may also be
some other problem, due to differences between the GCC settings in linux and
Mac. At least on the Mac the native compiler supports both 64-bit and 32-bit
binaries, and those two flags select the 32-bit binaries.
But very good progress anyway!
--Pekka
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