Newer GCC versions (>4.4.3) are setting __FORTIFY_SOURCE=2 thereby forcing stricter checks for buffer overflows.
Similar to Bug 2580745 xastir segfaults with an buffer overrun error if we do a lookup of an VE callsign.
See also http://bugs.gentoo.org/show_bug.cgi?id=337365
The problem is line 258 of rac_data.c. The code reads as follows:
rc = fgets((char *)&racdata, sizeof(racdata), fdb);
It looks perfectly legal, but the __bos macro in stdio2.h seems to get the size of
the buffer wrong causing a buffer overun error.
The attached code snippet fixes the problem.