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Re: Configuring AROS build system for thumb/thumb2 ISA
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Home away from home
 
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What I thought was compilation error caused by GCC 5.3.0 was in fact of course caused by ARM version of genmodule.h
There doesn't seem to be an easy way of defining something similar to "arm-all" architecture for "arm-thumb" and as so "arm-all" is pulled in always. For pulling in the correct includes one could do something like this:
#elif defined __arm__
Similar thing could be done for arm-all source files using a stub file as there doesn't seem to be an easy way of using %build_archspecific more cleverly.
#if defined __arm__
If AROS gets support for thumb interworkin this all might mix things too much.
Posted on: 2016/1/16 18:33
Edited by DizzyOfCRN on 2016/1/17 18:35:09
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Re: Configuring AROS build system for thumb/thumb2 ISA
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Home away from home
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After some twiddling with the build system it should now be able to produce some sort of Thumb/Thumb2 code out of the box.
There are some issues with the GCC 5.3.0 and Thumb instruction set still, but it can build the ST hal drivers and produce runnable code for the Discovery board.
[MMAKE] Building AROS.stm32f7_discovery-bootstrap
Posted on: 2016/1/15 8:11
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Re: Configuring AROS build system for thumb/thumb2 ISA
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Home away from home
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I magaged to build gcc 5.3.0 as AROS cross compiler and brutely added some ".if (__thumb__) xxxx .else xxx .endif" to libaebi. Configuration script messes with other arm targets... (removed hardcoded -marm)
I converted the VisualGDB LCD example to build inside AROS build system and it actually works. http://visualgdb.com/tutorials/arm/stm32/lcd/
Posted on: 2016/1/11 21:38
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Jyrki.J.Koivisto
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Configuring AROS build system for thumb/thumb2 ISA
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Home away from home
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Hi,
I bought the new stm32f7 discovery board (http://www.st.com/st-web-ui/static/active/en/resource/technical/document/user_manual/DM00190424.pdf) and decided to use AROS build system to code for it but at the moment thumb/thumb2 instruction set can't be compiled as the ARM target adds hard coded definitions for -marm On windows with VisualGDB, GCC 5.3.0 is invoked with just "-mcpu=cortex-m7 -mthumb -mfloat-abi=soft", should the AROS ARM compiler be just a generic one and configure script would add the needed lines for gcc? Or should there be a new switch for the ISA? (ARM, ARMTHUMB ?) Or what?
Posted on: 2016/1/11 14:23
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