i am very strange about the toolchains, arm-eabi-gcc, arm-linux-gcc, and arm-elf-gcc.
For arm-linux-gcc and arm-elf-gcc, in my opinion, just used the different the libc.
But what's the difference between arm-eabi-gcc and arm-linux-gcc ?
i regard that arm-eabi-gcc dont built in the libc. Am i right ?
if not, could you help to correct me ?
And also why uboot used arm-linux-gcc for the default arm cross compiler ?
As i know, the uboot dont need that libc for dependency.
so that is my problem.
thx!
It's called the target alias or the target-triplet of the toolchain what it's for, basically, is to identify that toolchain from other toolchains and from the native one you have. It tells you what architecture, ABI and target host the toolchain is built for, example:
arm-none-gnueabi: bare metal (no operating system) gnu ABI
arm-linux-eabi: produces binaries for a hosted system (running a Linux environment)
The GCC compiler *gcc is a driver program running other programs. So run
arm-linux-gcc -v -O -Wall helloworld.c -o hellworld-linux-gcc
arm-elf-gcc -v -O -Wall helloworld.c -o hellworld-elf-gcc
arm-eabi-gcc -v -O -Wall helloworld.c -o helloworld-eabi-gcc
and you'll understand the differences. They probably all run some cc1 program doing the translation to assembly code, some as program doing the assembling of assembler code to object code, some ld program doing the linking with some standard libraries. They may also run some collect2 wrapping some linking etc etc.
You may also want to run simply arm-linux-gcc -v or arm-elf-gcc -v or arm-eabi-gcc -v to understand how your compilers have been configured, and their precise version.
