SPNU151W January 1998 – March 2023 66AK2E05 , 66AK2H06 , 66AK2H12 , 66AK2H14 , AM1705 , AM1707 , AM1802 , AM1806 , AM1808 , AM1810 , AM5K2E04 , C346BA02 , C348A01 , CS241C01-Q1 , CS241C05-Q1 , CS246C01-Q1 , CS348C02-Q1 , OMAP-L132 , OMAP-L137 , OMAP-L138 , S470AV336LYSQRB , TMS470R1A288 , TMS470R1A384 , TMS470R1A64 , TMS470R1B1M , TMS470R1B512 , TMS470R1B768
Functions defined in C++ that will be called from assembly should be defined as extern "C" in the C++ file. Functions defined in assembly that will be called from C++ must be prototyped as extern "C" in C++.
Example6-1 illustrates a C++ function called main, which calls an assembly language function called asmfunc, Example6-2. The asmfunc function takes its single argument, adds it to the C++ global variable called gvar, and returns the result.