I am porting some code to an 8051. (header.h)
typedef int (Writer) (int , u_char * , u_char , size_t , u_char * , int *) reentrant;
Writer bob;
. . . int bob(int val1, u_char * dat1, u_char dat2, size_t val2, u_char * dat3, int *pval) reentrant { }
//Comment out Writer bob; int (bob)(int val1, u_char * dat1, u_char dat2, size_t val2, u_char * dat3, int *pval) reentrant;
"This is code that runs on windows, but was written in a portable manner." Trouble is, C51 is an unconventional implementation of 'C' - particularly the way that it does not use the hardware stack for function parameters & locals. Conventional 'C' functions are inherently reentrant; C51 functions are inherently non-reentrant. Therefore, even the best-designed "portable" 'C' that relies on reentrant functions (as found in 99% of 'C' implementations) will break on C51. :-( "I could go back to windows, but the problem is that I will inevitably have to deal with the C51 issues" Absolutely - but couldn't that be biting off too much at once? I'm just suggesting that you take it a step at a time: First, stick with the familiar, conventional Windows environment and remove the reentrancy requirement; Then, when you know you've got it working non-reentrant, move it to C51 and address all the other issues (word size, byte ordering, etc, etc)