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What's the differences between arm-eabi-gcc and arm-elf-gcc? Can they both compile the same source code for cortex-m3 arch?
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With "arm-eabi-gcc" you have the Linux system C library which will make calls into the kernel IOCTLs, e.g. for allocating memory pages to the process. With "arm-eabi-none-gcc" you are running on platform which doesn't have an operating system at all - so the C library is different to cope with that.
• arm-none-eabi is the toolchain we use in this class. This toolchain targets the ARM architecture, has no vendor, does not target an operating system (i.e. targets a “bare metal” system), and complies with the ARM EABI.
Download and run the installer to install arm-none-eabi-gcc and arm-none-eabi-gdb. Select the default destination folder: C:\Program Files (x86)\GNU Arm Embedded Toolchain\10 2020-q4-major. Notes: Check the Add path to environment variable option before you click the Finish button for the installation.
arm-elf-gcc is the old toolchain supporting legacy floating-point accelerator (FPA) and the mixed-endian floating-point format.
arm-eabi-gcc is the newer geneartion of toolchain supporting VFP floating-point format.
I imagine they can compile the same source, but the later one is newer so that must be richer feature wise. What you want to hear depends on which OS / libraries you are compiling against. Toolchain, fundamental libraries and OS go arm in arm. They need to have same ABIs.
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