Compile for ARM Cortex M3 using standard GCC?

Question

Is it possible to compile C/C++ code for the ARM Cortex M3 (LPC1768) using vanilla GCC with the --target switch, or will I need to compile GCC, binutils, etc to do this?

You can try this if you are using linux. eluaproject.net/doc/v0.8/en_tc_cortex.html — harvis
– harvis, Commented Aug 18, 2012 at 10:57

Balau · Accepted Answer · 2012-11-14 11:03:41Z

10

As already said, those are not your only two options. I suggest trying this toolchain prepared by ARM engineers: GNU Tools for ARM Embedded Processors . It's specifically tailored for Cortex-M and Cortex-R cores, and it doesn't require registration to download it.

answered Nov 14, 2012 at 11:03

Balau

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David Grayson Over a year ago

I find the new download page for this toolchain to be much easier to use, and it gives me more peace of mind knowing it comes from arm.com: developer.arm.com/open-source/gnu-toolchain/gnu-rm/downloads

Balau · Accepted Answer · 2012-11-14 11:06:56Z

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You can find an excellent series of tutorial style blog posts here, for example this one about bare metal programming for the M3.

edited Nov 14, 2012 at 11:06

Balau

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answered Nov 3, 2012 at 20:10

ekoeppen

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Comments

jww · Accepted Answer · 2014-09-14 23:21:44Z

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CodeSourcery G++ supports a wide range of ARM processors including Cortex-M3. Its also free unless you need professional support.

edited Sep 14, 2014 at 23:21

jww

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answered Jan 17, 2011 at 19:00

ismail

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4 Comments

old_timer Over a year ago

well there is a lite version, and you need to read the license agreement.

old_timer Over a year ago

llvm, though, cross compiles out of the box, you can use -march=arm to build for arm. Depends on what you are doing though

old_timer Over a year ago

the cortex-m3 is thumb/thumb2 only so be careful to specify the processor type when compiling (with gcc), otherwise it will default to arm instructions. and my comment about llvm -march=arm will build arm it might be -march=thumb to build for thumb.

user1985657 Over a year ago

And make sure you do not specify -mthumb-interwork when you compile for Cortex-M, otherwise you will get ARM32 code in there, which your MCU will not understand, thus your program will crash.

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