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On 3/29/09, Martin Gysel <m.gysel@×××.ch> wrote: |
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> afaik arm-softfloat-elf should also work and should be used as the STM32 |
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> doesn't have a floating point unit... (I use it on a luminary board) |
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> what I'm still wondering, how do I enable the arm EABI? |
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Normally, you set the fourth field of the GNU architecture name to |
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-gnueabi instead of -gnu, such as arm-blah-linux-gnueabi. I have also |
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seen arm-none-eabi quoted as building successfully, but know nothing |
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of this. |
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> do I have to configure this at build time |
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That is the usual way |
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> can it be done through a compiler switch |
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You can also select EABI with appropriate command-line switches to any |
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GNU ARM compiler (from 4.1.1 on), but this is unusual. You normally |
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build the compiler to the system-wide default that you need. |
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> afaik you need EABI if you want to link you code against libraries which were build with a different compiler, say IAR |
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You need EABI if you want to link against other EABI binaries. The ABI |
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is a set of conventions for where you put parameters to function |
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calls, and where results are returned (on the stack? in registers? |
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which registers?) plus stuff like how objects must be aligned in |
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memory, how structure elements are laid out, the default size in bytes |
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of enums (a byte? a word?) and so on. |
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Lots of details are at wiki.debian.org/ArmEabiPort |
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M |
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