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Is arm-poky-linux-gnueabi-gcc for iMX6 SoloX buggy ?

Question asked by ag74 on Sep 7, 2015
Latest reply on May 16, 2016 by yoo Liang



I'm in charge of evaluating the iMX6 SoloX CPU using the iMX6SX Sabre SD demo board.

I succeeded in compiling the rootfs and the meta toolchain using Yocto but now I'm facing an issue with arm-poky-linux-gnueabi-gcc.


I'm able to compile some GPU samples but I can't run them on the demo board, linux tells me "no such file or directory".

I checked the header section with readelf and everything seems to be ok (if I compare it with the /sbin/ifconfig header section).


To figure out why I can compile an ELF file but I can't execute it, I created a simple hello world sample.


If I compile using the following commands everything's ok and I can run the output file (hello).

arm-poky-linux-gnueabi-gcc -march=armv7-a -mthumb-interwork -mfloat-abi=hard -mfpu=neon -mtune=cortex-a9 --sysroot=/opt/freescale/poky/1.7/sysroots/cortexa9hf-vfp-neon-poky-linux-gnueabi -o hello hello.c


But if I compile the same source file in several stages (as It's done in makefiles).

Frist I create a .o file and then I create the ELF file, I can't execute the output file (hello_bin).

Here's the command I use to generate the .o file.

arm-poky-linux-gnueabi-gcc -march=armv7-a -mthumb-interwork -mfloat-abi=hard -mfpu=neon -mtune=cortex-a9 --sysroot=/opt/freescale/poky/1.7/sysroots/cortexa9hf-vfp-neon-poky-linux-gnueabi -c hello.c -o hello_bis.o

and the command to generate the ELF file.

arm-poky-linux-gnueabi-gcc --sysroot=/opt/freescale/poky/1.7/sysroots/cortexa9hf-vfp-neon-poky-linux-gnueabi -o hello_bis hello_bis.o

I can execute hello but not hello_bis. The files do not have the same size.


I tried to repeat those two tests using arm-linux-gnueabihf-gcc, which is the gcc from the iMX6-based Toradex module, and the sysroot generated by freescale Yocto.

With this configuration (Toradex's gcc + freescale's sysroot) I can compile hello and hello_bis, they have the same size and they both work fine on the demo board.


After that I tried to recompile one of our biggest app using its makefile. I can't run the output generated by the arm-poky-linux-gnueabi-gcc but I can run the one generated by arm-linux-gnueabihf-gcc.


Is arm-poky-linux-gnueabi-gcc buggy ?

Does anyone can explain why the hello binary generated in one stage works fine and the hello_bis binary generated in two stages does not when using arm-poky-linux-gnueabi-gcc but they both work fine when generated with arm-linux-gnueabihf-gcc using the same compiling flags ?