Dear Martin Hejnfelt,
In message 1247062359.4070.21.camel@hejnfelt-2 you wrote:
I'm trying to use the sprintf function in a C program written for U-boot. As far as I understand, to get the function I have to add it to the exports.h, _exports.h and exports.c file as per the README.Standalone file in /doc (the function is declared in common.h). Now if I do this, the program compiles fine, and all is dandy, until I actually start using the function. It generates garbage. printf and alike works fine, and the program runs like it should, except the places where sprintf is used, I get garbage (meaning some environment variables are looking pretty nasty since the result of the sprintf functions are used for these). When compiling I link to the examples/libstubs.a file and lib_generic/libgeneric.a where the code I'm using should be present.
Note that 1) linking libgeneric.a should not be needed and 2) doing so makes your standalone application to be GPLed.
When I do this, the line that defines the a[6] thing generates a compiler error stating an undefined reference to memcpy. Since this error is present every time I try to initialize a string (char*) or char array I'm guessing this might be the problem, but I'm not sure...
You probably have to come up with a linker script and a concept of where your data segment is located...
Best regards,
Wolfgang Denk