What is arm none linux gnueabi gcc

arm-linux-gnueabi compiler options

I am using, arm-linux-gnueabi-gcc to compile C programs for ARM processor in Linux. However, I am not sure what is the default ARM mode for which it compiles.

For example, for the C code:

now, when I look at the disassembly of main() function with objdump, I can see:

it appears that this is disassembly for Thumb mode of ARM (because of the push instruction).

How can I display the disassembly as follows:

I saw this example here:

however, I am unable to view the disassembly the way it is displayed there.

2 Answers 2

push doesn’t necessarily tell you it is in thumb mode, in fact ARM’s new assembly syntax called unified assembly language which means in most of the cases you can compile same code to arm or thumb-2 instruction sets.

Other problem is that, you are compiling in -O0 mode which adds some extra instructions for easy of debugability. Try -O2 and you should get the instruction flow you want.

gcc with -v switch as in arm-linux-gnueabi-gcc -v should show you how it is built, which also tells you the overall default options it uses when compiling your source code.

One last thing, targeted assembly sequence you mentioned uses ATPCS register naming scheme (check objdump doc for information), it uses a1 instead of r0 for example. You can also get this by setting disassembler-options in objdump with -M switch. Like below;

Another option is to get assembly output from gcc itself by using -S switch. Like below;

then you should get a new file called test.s in the same folder. However I don’t know if there is an option for you to set the register naming.

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What is arm none linux gnueabi gcc

(It is recommended that all commands be done under root)
First enter su to get root privileges (if you are prompted for a password error, Baidu will change the password)
execute the following command again
1. Download, thanks to the universal wget

2 After downloading, copy the file to the /usr/local folder with the following command, extract it.

(If prompted and error is executed as su as root) then execute the following command

3Configure environment variables to make them effective

First, move the cursor to the end of the file (using the up, down, left, and right keys of the keyboard)

Second, press the o key on the keyboard to add a new line under the cursor line to start inserting;

Then, insert the following statement; (copy and paste it up)

Finally, save and exit.
The exit method is: first press the ESC key to return to the command mode; then enter the colon: to enter the last line mode.
Enter wq and press Enter. This will save the /etc/bash.bashrc script and exit vi.

Finally executed: source /etc/bash.bashrc
Close the current terminal and reopen the terminal for testing.
4. Test, enter

If it appears: No such file or directory
This is because 64-bit Ubuntu is not compatible with 32-bit software. Enter the following command

Su Note: still get root privileges If you are already root, please ignore

arm-none-linux-gnueabi-gcc -v
If you can output a long list of messy things and then finally gcc version 4.3.3 (Sourcery G++ Lite 2009q1-203), then the installation merits are complete, you can compile happy The young people.

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gcc-arm-linux-gnueabi command not found

I am trying to install the gnu arm toolchain for ubuntu. I first downloaded the tar from CodeSourcery. However when I go into the bin folder, I cannot run any of the binaries. I have tried with ./ and without and putting it in the PATH and it keeps telling me «Command not Found» yet the file is there in the folder right in front of me. Then I tried sudo apt-get install gcc-arm-linux-gnueabi except after it says it has installed successfully, I cannot find it with whereis gcc-arm-linux-gnueabi. Can anyone help?

11 Answers 11

Are you compiling on a 64-bit OS? Try:

I had the same problem when trying to compile the Raspberry Pi kernel. I was cross-compiling on Ubuntu 12.04 64-bit and the toolchain requires ia32-libs to work on on a 64-bit system.

CodeSourcery convention is to use prefix arm-none-linux-gnueabi- for all executables, not gcc-arm-linux-gnueabi that you mention. So, standard name for CodeSourcery gcc would be arm-none-linux-gnueabi-gcc .

After you have installed CodeSourcery G++, you need to add CodeSourcery directory into your PATH .

Typically, I prefer to install CodeSourcery into directory like /opt/arm-2010q1 or something like that. If you don’t know where you have installed it, you can find it using locate arm-none-linux-gnueabi-gcc , however you may need to force to update your locate db using sudo updatedb before locate will work properly.

After you have identified where your CodeSourcery is installed, add it your PATH by editing

/.bashrc like this:

Also, it is customary and very convenient to define

in your .bashrc , because with CROSS_COMPILE defined, most tools will automatically use proper compiler for ARM compilation without you doing anything.

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What is arm none linux gnueabi gcc

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What’s the difference between arm-linux- / arm-none-linux-gnueabi- / arm-fsl-linux-gnueabi- in LTIB?

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Showing off my stupidity yet again I suppose.

I’m on a SABRESD board with linux running (LTIB). I wanted to write a simple «hello-world.c»

to make sure I used the correct tools. So I built it with arm-fsl-linux-gnueabi-gcc (under /opt/freescale), moved it

to my embedded system and i t worked as expected. To further test, I built it again using arm-none-linux-gnueabi-gcc

figuring that it would not run, but it worked.

Then I did a quick ls -l on the bin directory and I see that two different named toolsets all linked to arm-fsl-linux-gnueabi-xxx

under /opt/freescale; giving a total of three different named gcc toolsets all pointing to the same executable.

What’s up with that? The bare-metal tools have to use different libs than the linux-user-space tools right?

Is this done internally based on argv[0] or something?

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yes, what you said is right. If you cross compile your application using these three compilers

having three different executable names, and if you check elf formats of the executables (readelf -a

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Simple Answer, all arm-linux-* and arm-none-linux-gnueabi-* are symbolic links and are pointed to arm-fsl-linux-gnueabi-*

which ever tool name you use, it will use only arm-fsl-linux-gnueabi-*

$ ls -l /opt/freescale/usr/local/gcc-4.4.4-glibc-2.11.1-multilib-1.0/arm-fsl-linux-gnueabi/bin/arm-*linux*gcc

-r-xr-xr-x 2 root root 231900 2010-09-20 17:06 /opt/freescale/usr/local/gcc-4.4.4-glibc-2.11.1-multilib-1.0/arm-fsl-linux-gnueabi/bin/arm-fsl-linux-gnueabi-gcc

lrwxrwxrwx 1 root root 25 2013-03-18 00:23 /opt/freescale/usr/local/gcc-4.4.4-glibc-2.11.1-multilib-1.0/arm-fsl-linux-gnueabi/bin/arm-linux-gcc -> arm-fsl-linux-gnueabi-gcc

lrwxrwxrwx 1 root root 25 2013-03-18 00:23 /opt/freescale/usr/local/gcc-4.4.4-glibc-2.11.1-multilib-1.0/arm-fsl-linux-gnueabi/bin/arm-none-linux-gnueabi-gcc -> arm-fsl-linux-gnueabi-gcc

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GCC is a popular tool chain that can generate executables for wide range of architectures including x86, ARM v4/v5/v6/v7, and many others. In personal computers GNU GCC is a compiler that compiles an application written for LINUX X86 PC. When the host and target architectures are different, the tool chain is called » cross compiler «.

You may come across different tool chains to cross compile your application for ARM like arm-none-linux-gnueabi, arm-none-eabi, arm-eabi, arm-fsl-linux-gnueabi-gcc etc.

Tool chains have a loose name convention like arch [-vendor] [-os] — eabi

arch — refers to target architecture (which in our case is ARM)

vendor — refers to toolchain supplier

os — refers to the target operating system

eabi — refers to Embedded Application Binary Interface

some illustrations as follows :

arm-none-eabi — This tool chain targets for ARM architecture, has no vendor, does not target an operating system and complies with the ARM EABI.

arm-none-linux-gnueabi — This toolchain targets the ARM architecture, has no vendor, creates binaries that run on the Linux operating system, and uses the GNU EABI. It is used to target ARM-based Linux systems.

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What is arm none linux gnueabi gcc

⚒️ Bleeding edge GNU GCC toolchains (CC only) built from sources with latest binutils and glibc. (for ARM)

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README.md

GNU GCC Toolchain

Bleeding edge GNU GCC AArch32 systems. built from sources with latest binutils and glibc. These Builds (on master/main branch) are always made from the latest GCC sources rather than stable releases.

This toolchain AArch32 AArch64 here. Built with Support for Link Time Optimization, -O3, —disable-nls and removed extras that we don’t need.

Getting the toolchain

Clone using git from this repo, As currently we don’t have any mirror or a archived release.

Note: This is continous updating repository made from the latest GCC sources rather than stable releases, if you want to use stable release of gcc clone the stable-gcc branch of this repository.

Note: Also using depth flag (—depth=1) is recommended as repository size is large and will keep increasing in future updates.

Using the toolchain

Export the CROSS_COMPILE in enviroment

Along with the compiler (GCC) which is built from latest sources, the GNU and other libraries and prerequisite are also been built from latest sources itself.

Multiple-Precision Floating-Point Computations with Correct Rounding (MPFR) http://www.mpfr.org/

C Standard Library Intended for use on Embedded Systems (NEWLIB) https://sourceware.org/newlib/

GCC is licensed under version 3 of the GNU General Public License. The GCC runtime exception permits compilation of proprietary and free software programs with GCC and usage of free software plugins. The availability of this exception does not imply any general presumption that third-party software is unaffected by the copyleft requirements of the license of GCC.

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⚒️ Bleeding edge GNU GCC toolchains (CC only) built from sources with latest binutils and glibc. (for ARM)

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