Средства и методы разработки

// file: standalone.c 

//.... из шапки:

/*
 * This code defines a run-time environment for the C library.
 * Without this, the C startup code will attempt to use semi-hosting
 * calls to get environment information.
 */

// На что ругается.

/// @cond HIDDEN_SYMBOLS
#pragma import(__use_two_region_memory)
__value_in_regs struct R0_R3 {
    unsigned heap_base, stack_base, heap_limit, stack_limit;
}
__user_initial_stackheap(unsigned int R0, unsigned int SP, unsigned int R2, unsigned int SL)
{
    struct R0_R3 config;
    config.heap_base = (unsigned int)&Image$$RW_RAM1$$ZI$$Limit;
    config.stack_base = SP;
    config.heap_limit = SP - 0x10000;
    return config;
}
/// @endcond HIDDEN_SYMBOLS

standalone.c:37:17: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'struct'                                                                                 __value_in_regs struct R0_R3 {                                                                                                                                                             ^~~~~~                                                                     

Это из комплекта Nuvoton NonOS_BSP