The error occurs when you try to use outportb. The file
/djgpp20/include/inlines/pc.h does not compile correctly. The compiler
returns the following message:
/djgpp20/include/inlines/pc.h In function 'void outportb(short unsigned int,
unsigned char)':
/djgpp20/include/inlines/pc.h 38: parse error before '::'
/djgpp20/include/inlines/pc.h In function 'void outportw(short unsigned int,
unsigned char)':
/djgpp20/include/inlines/pc.h 46: parse error before '::'
/djgpp20/include/inlines/pc.h In function 'void outportl(short unsigned int,
unsigned char)':
/djgpp20/include/inlines/pc.h 54: parse error before '::'