[gpsd-dev] 3.13 does not compile on OS X 10.10

[Frank Nicholas]

git clone git://git.sv.gnu.org/gpsd.git

scons check

.

.

ntpshmread.c:75:5: warning: implicit declaration of function 'clock_gettime' is

      invalid in C99 [-Wimplicit-function-declaration]

    clock_gettime(CLOCK_REALTIME, &shm_stat->tvc);

    ^

ntpshmread.c:75:19: error: use of undeclared identifier 'CLOCK_REALTIME'

    clock_gettime(CLOCK_REALTIME, &shm_stat->tvc);

                  ^

1 warning and 1 error generated.

scons: *** [ntpshmread.os] Error 1

scons: building terminated because of errors.

This is using Apple's developer tools that come with Xcode.  This is the same toolchain I've always used.

Any other info I can provide?