putchar - Linking issue with IAR Workbench and STM32F4x using custom startup file -


getting following error:

error[li005]: no definition "__write" [referenced putchar.o(dl7m_tln.a)]

i disabled low level implementation run application without debugger connected. dont have putchar declaration active in code have following:

   thumb     pubweak reset_handler     section .text:code:noroot:reorder(2) reset_handler     ldr     r0, =systeminit         ; self test library initialization sequence     blx     r0     ldr     r0, =__low_level_init     blx     r0     cmp     r0, #0     beq.n   _call_startup     ldr     r0, =__iar_data_init3     blx     r0 _call_startup:              ldr     r0, =stl_startup        ; stl_startup finishes goto  __iar_program_start     bx      r0

where __low_level_init called. without call removed got same error.

wondering how can track if there somehow putchar call inside code not aware of. @ point debug printf/putchar commented out


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