I have some issue with Linaro gcc. Durig build arm image gcc package was included. But as result gcc command work but there are no headers and no crtl1.o.
Could someone suggest me how build image with full working gcc toolchain for arm.
P.S. I don't need crossplatform compiler on linux target. It should be working gcc on arm platform (on board).
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I want to cross compile the gcc for powerpc7448, and after this I want to run one simple program and get the elf from the cross compiled gcc for powerpc7448,I am using the linux OS,could anyone please suggest me the steps, cross compilation gcc for powerpc7448(any link) and what are all the components are required for cross compilation,Thanks in advance.
Try ELDK cross compiler toolchain (linux distributions) for PowerPC:
ftp://ftp.denx.de/pub/eldk/4.2/ppc-linux-x86/distribution/README.html
Check Eldk version 4.2.
Help: https://www.denx.de/wiki/ELDK-5/WebHome
ppc_74xx-gcc from eldk can be used to compile for your platform.
`
$ ppc_74xx-gcc -c myfile.c
`
I would like to assemble Aarch64 armv8 Assembly on my mac and eventually run it with qemu and maybe on a real device like a raspberry pi 2 or 4 later on. I don't know how to assemble the code I'm going to write, gcc, llvm-gcc and clang don't seem to support the -arch=armv8 flag or anything similar. So I can't build for the targeted architecture, how could I achieve this?
I'm running mac os 10.14.5. I wouldn't mind finding a solution that works on a recent ubuntu version either since I have a VM for linux development.
The clang version that ships with Xcode supports -arch arm64. (Or armv7 for 32bit.)
Note that if you want to use any libraries though, they'll have to be arm64 as well. If you want, you can invoke the iOS toolchain with xcrun -sdk iphoneos clang -arch arm64 [...], but then you'll also have to pull the libraries you want off of some IPSW and stuff them into qemu.
Also note that the above will give you a Mach-O binary. For your Raspberry Pi, you'll probably want an ELF, and you'll probably want gcc rather than clang. You should be able to build both gcc and GNU binutils from source with --target as either aarch64-linux-gnu or aarch64-none-elf, depending on your goals. Yet another note: since macOS silently aliases gcc to clang and many tools depend on that, you'll probably also want to build this toolchain with something like --program-prefix=aarch64-.
I currently try to understand how cross-compilers work. I'm a bit confused about the two-staged compiler compilation process.
As far as I read, the following procedure is applied:
Compile bintutils for the target architecture
Compile GCC (stage 1)
Compile newlib/eglibc/... with GCC
Compile GCC with the libc (stage 2)
Why is there a second stage involved? Couldn't I just invoke the first stage compiler with some flag like -lc to include libc?
I'm not sure why gcc has such a complicated build process. My clang/LLVM based ELLCC (http://ellcc.org) cross tool chain project builds like this:
Compile the compiler (using either gcc or a pre-built version of the ELLCC compiler available from the web site.).
Use the compiler to build the C++ and C libraries for all targets.
Build binutils and gdb for all targets (for all targets: don't make target specific utilitities except for the assemblers. ld, gdb, objdump, etc. all support this)
(optional) Use your newly built compiler to cross build itself for all the targets.
BTW, ELLCC currently supports ARM, Microblaze, Mips, PowerPC, and x86 targets for Linux and bare metal execution environments.
I build a cross compile toolchain on OSX with:
binutils-2.23.52
gcc-4.6.4
gcc-core-4.6.4
gcc-g++-4.6.4
gdb-7.6.1
gmp-4.3.2
mpc-1.0.1
mpfr-2.4.2
newlib-2.0.0
for the target EFM32 wich is a ARM Cortex-m3, so the gcc target is arm-none-eabi.
All compiled fine.
But making programs with this toolchain like blink.c don't actually run on the EFM32 board.
I checked the blink.bin I did with a binary created with a IAR commercial toolchain delivered in the demos from energymicro, also gcc based and the they look very different internally (as expected :).
So has my toolchain wrong libs/versions or is it simply a matter of gcc/ld/ar switches wrong and what would be the steps to systematicly analyse this?
I know that to compile to assembly, I should use the -Soption with gcc or g++, but how do I get MIPS assembly?
I tried
g++ -march=mips2 dll.c
but that gives the error
dll.c:1:0: error: bad value (mips2) for -march= switch
I saw a suggestion of the compile command mips_gcc, but I can't find how to install that compiler.
I'm using Ubuntu 64-bit, if that helps.
You need a version of gcc that is built as a MIPS cross compiler. You can download the free Mentor/Codesourcery MIPS gnu/gcc cross compilation tool chain from here. This toolchain is available for both Windows and Linux.
After downloading, installing and adding the tool chain to your path you would say:
mips-linux-gnu-g++ -march=mips32r2 -S dll.c
to compile your code to MIPS32R2 assembly.
UPDATE 8/2017:
It looks like Sourcery CodeBench free cross compiler for MIPS is no longer available at Mentor's site.
Try the free toolchain at Imagination's site.