symbols.h

#ifndef __USER_LABEL_PREFIX__
#  if defined(__ELF__)
#    define __USER_LABEL_PREFIX__
#  else
#    define __USER_LABEL_PREFIX__ _
#  endif
#endif

#define __STRING(x)	#x
#define __STRINGIFY(x)	__STRING(x)

#ifndef __SYMBOL_PREFIX
# define __SYMBOL_PREFIX __STRINGIFY(__USER_LABEL_PREFIX__)
# define __ASM_SYMBOL_PREFIX __USER_LABEL_PREFIX__
#endif

#ifndef C_SYMBOL_NAME
# ifdef __ASSEMBLER__
#   define C_SYMBOL_NAME2(pref, name) pref##name
#   define C_SYMBOL_NAME1(pref, name) C_SYMBOL_NAME2(pref, name)
#   define C_SYMBOL_NAME(name) C_SYMBOL_NAME1(__ASM_SYMBOL_PREFIX, name)
# else
#   define C_SYMBOL_NAME(name) __SYMBOL_PREFIX #name
# endif
#endif