To build an application that does not perform any host I/O (and therefore can be loaded and run without using armv7-linux-gdb) specify the -mno-host-io compiler option when linking the application.

host% arm-none-eabi-gcc hello.o -o hello.out -Wl,--defsym,__start=0x40000000,--defsym,__stack=0x60000000 -mno-host-io

To build an application that does not perform any host I/O (and therefore can be loaded and run without using armv7-linux-gdb) the following steps are required:

• Download and extract the the attached specs file, noio.specs, which contains the following:

  %rename lib lib_noio
  %rename startfile startfile_noio
   
  *lib:
  -lc -lnosys -T rdimon.ld 
  *startfile:
  crti%O%s crtbegin%O%s crt0%O%s cortex-a9-init%O%s

  Note: Please do not copy and paste the above text (instead of downloading the attached specs file) since this may introduce erroneous spaces that will cause problems when the specs file is interpreted by GCC.
• Replace the link command used to build an application (for a B2020-STiH415 target) with I/O:

  host% arm-none-eabi-gcc hello.o -o hello.out -Wl,--defsym,__start=0x40000000,--defsym,__stack=0x60000000

  with the following:

  host% arm-none-eabi-gcc hello.o -o hello.out -Wl,--defsym,__start=0x40000000,--defsym,__stack=0x60000000 -B. -specs=noio.specs

  assuming that noio.specs is in the current directory (if not change the -B option to specify the actual location of noio.specs). Note that the command line is identical to that used to build an application with I/O except for the addition of the -B and -specs options.