New Development Library Testing

Development libraries perform differently in each system. Never assume a library performs the same in your system as what's on the developer's website or what's in their documentation. Always verify the specific features of a library by debugging your own small test programs.

1. Make a new source file "test.c" for verifying a function of a library then compile it using the command "gcc -Wall test.c -o test":

#include    <header file>

int main(int argc, char **argv)

{

    int   foo;    /* return value */

    if (argc != 3)

{

        printf("usage: test <function value 1> <function value 2>");

        return -1;

}

    foo = function(argv[1], argv[2]);

...

    printf(" ", foo);

    return 0;

}

2. Run the command strace to see how the function performs its operations:

strace -C -f -i -tt -T -v test;

strace -C -f -i -tt -T -p <running process pid> -u <username> -v;

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