Wiki 'Getting Started' example should clarify define JEMALLOC_MANGLE needs to be set

[4-rodrigo-salazar]

The getting started wiki provides a nice example which assumes that mangling is enabled:

#include <stdlib.h>
#include <jemalloc/jemalloc.h>

void
do_something(size_t i) {
        // Leak some memory.
        malloc(i * 100);
}

int
main(int argc, char **argv) {
        for (size_t i = 0; i < 1000; i++) {
                do_something(i);
        }

        // Dump allocator statistics to stderr.
        malloc_stats_print(NULL, NULL, NULL);

        return 0;
}

It seems this would only compile successfully if JEMALLOC_MANGLE is set (malloc_stats_print by default is only available using the prefix je_malloc_stats_print).

It would be helpful to a note in the wiki regarding how to turn on mangling for your compilation (either by providing the -DJEMALLOC_MANGLE flag in the compilation command or setting the define in the configure step) :)