According to the commit log, these patches were supposed to use
<istream.h> for gcc version less than 3.2 (namely GCC 2.95). The
logic is flawed. It doesn't work for gcc 3.2 or greater. There must
have been a compatibility header in gcc 4 that masked the error. GCC5
doesn't have one so it broke.
The logic is __GNU__ < 3 || __GNUC_MINOR__ < 2
it was intended to be __GNU__ < 3 || (__GNU__ == 3 && __GNU_MINOR__ < 2)
However, there is no point in fixing these patches. These ancient
GCCs aren't available on currently supported FreeBSD releases.
Approved by: Just fix it
7e32b10876