CAVR-4
Contents
ix
math.h .................................................................................................83
stdio.h .................................................................................................83
stdlib.h ................................................................................................83
printf, scanf and strtod .......................................................................84
The CLIB runtime environment .............................................................. 85
Runtime environment ..........................................................................85
Input and output .....................................................................................87
Character-based I/O ...........................................................................87
Formatters used by printf and sprintf .................................................87
Formatters used by scanf and sscanf ..................................................89
System startup and termination ......................................................89
System startup ....................................................................................89
System termination ............................................................................90
Overriding default library modules ................................................90
Customizing system initialization ...................................................90
Implementation of cstartup ..............................................................90
C-SPY runtime interface ....................................................................91
The debugger terminal I/O window ...................................................91
Termination ........................................................................................91
Checking module consistency ...........................................................91
Assembler language interface ................................................................... 93
Mixing C and assembler .......................................................................93
Intrinsic functions ..............................................................................93
Mixing C and assembler modules ......................................................94
Inline assembler ................................................................................95
Calling assembler routines from C .................................................96
Creating skeleton code .......................................................................96
Compiling the code ............................................................................97
Calling assembler routines from C++ ............................................98
Calling convention ..................................................................................99
Choosing a calling convention ...........................................................99
Function declarations ......................................................................100
C and C++ linkage ...........................................................................100
