usr/lib/libc.so: file not recognized: file format not recognized

[Carson]

Hello, I am working with the STM32MP257F-EV1 Development board and I am getting stuck. I am following the following guide: https://wiki.st.com/stm32mpu/wiki/Getting_started/STM32MP2_boards/STM32MP257x-EV1/Develop_on_Arm%C2%AE_Cortex%C2%AE-A35/Modify,_rebuild_and_reload_the_Linux%C2%AE_kernel. I am doing the step make ${IMAGE_KERNEL} vmlinux dtbs LOADADDR=0xC2000040 O="${OUTPUT_BUILD_DIR}" and when I run make I get the following output:

make[1]: Entering directory '/home/carson.kirk@internal.etherform.com/STM32MPU_Workspace/STM32MPU-Ecosystem-v5.1.0/Developer-Package/stm32mp2-openstlinux-6.1-yocto-mickledore-mpu-v24.06.26/sources/aarch64-ostl-linux/linux-stm32mp-6.1.82-stm32mp-r2-r0/build'
GEN Makefile
HOSTLD scripts/dtc/dtc
/home/carson.kirk@internal.etherform.com/STM32MPU_Workspace/STM32MPU-Ecosystem-v5.1.0/Developer-Package/SDK/sysroots/x86_64-ostl_sdk-linux/usr/lib/gcc/x86_64-ostl_sdk-linux/12.3.0/../../../../lib/libc.so: file not recognized: file format not recognized
collect2: error: ld returned 1 exit status
make[2]: *** [/home/carson.kirk@internal.etherform.com/STM32MPU_Workspace/STM32MPU-Ecosystem-v5.1.0/Developer-Package/stm32mp2-openstlinux-6.1-yocto-mickledore-mpu-v24.06.26/sources/aarch64-ostl-linux/linux-stm32mp-6.1.82-stm32mp-r2-r0/linux-6.1.82/scripts/Makefile.host:120: scripts/dtc/dtc] Error 1
make[1]: *** [/home/carson.kirk@internal.etherform.com/STM32MPU_Workspace/STM32MPU-Ecosystem-v5.1.0/Developer-Package/stm32mp2-openstlinux-6.1-yocto-mickledore-mpu-v24.06.26/sources/aarch64-ostl-linux/linux-stm32mp-6.1.82-stm32mp-r2-r0/linux-6.1.82/Makefile:1524: scripts_dtc] Error 2
make[1]: Leaving directory '/home/carson.kirk@internal.etherform.com/STM32MPU_Workspace/STM32MPU-Ecosystem-v5.1.0/Developer-Package/stm32mp2-openstlinux-6.1-yocto-mickledore-mpu-v24.06.26/sources/aarch64-ostl-linux/linux-stm32mp-6.1.82-stm32mp-r2-r0/build'
make: *** [Makefile:238: __sub-make] Error 2

I am unsure how to fix this error. Any help would be greatly appreciated. Thanks!

Carson

[davinnicholas]

I am also experiencing the same exact issue. Any feedback would be great!

[krotti42 · Accepted solution]

Seems to be an installation issue from the installation script.

The following libc path isn't correct or there is a missing symbolic link to libc:

sysroots/x86_64-ostl_sdk-linux/lib/usr/libc.so is indeed no shared object file:

$ file libc.so
libc.so: ASCII text, with very long lines (304)
$ cat libc.so
/* GNU ld script
   Use the shared library, but some functions are only in
   the static library, so try that secondarily.  */
OUTPUT_FORMAT(elf64-x86-64)
GROUP ( /home/jk/Downloads/Developer-Package/SDK/sysroots/x86_64-ostl_sdk-linux/lib/libc.so.6 /home/jk/Downloads/Developer-Package/SDK/sysroots/x86_64-ostl_sdk-linux/usr/lib/libc_nonshared.a  AS_NEEDED ( /home/jk/Downloads/Developer-Package/SDK/sysroots/x86_64-ostl_sdk-linux/lib/ld-linux-x86-64.so.2 ) )
$

The real libc shared library can be found under sysroots/x86_64-ostl_sdk-linux/lib.

As workaround you could try to delete the libc.so and text file and create a symbolic link with ln.

$ rm libc.so
$ ln -s ../../lib/libc.so.6 libc.so

[Carson]

Yep that worked! thank you so much!