ERROR MESSAGE --- Error: failed to execute 'arm-none-eabi-as'

After I tried to build my code the following message keeps occurring, --- Error: failed to execute 'arm-none-eabi-as' Please help
ERROR MESSAGE --- Error: failed to execute 'arm-none-eabi-as'

After I tried to build my code the following message keeps occurring, --- Error: failed to execute 'arm-none-eabi-as' Please help
arm-elf-gcc _sbrk errors

Hi, I tried to compile an empty main function (just to test the toolchain) but i got these errors. fairuz@ubuntu:~/test$ arm-elf-gcc -mcpu=arm7tdmi-s test.c /opt/gnuarm/lib/gcc/arm-elf/4.4.1/....
arm-elf-gcc _sbrk errors

Hi, I tried to compile an empty main function (just to test the toolchain) but i got these errors. fairuz@ubuntu:~/test$ arm-elf-gcc -mcpu=arm7tdmi-s test.c /opt/gnuarm/lib/gcc/arm-elf/4.4.1/....
Using gcc in MDK-ARM linker error

I'm trying to use gcc in MDK-ARM . In CubeMX I generated a simple project for STM32F407 . I generate project for MDK-ARK and SW4STM32 too. In MDK-ARM I switch complier on gcc and install last Gcc for...