open SHM data only after cgps start

[Hans Kurscheidt]

may be I'm compiling/linking w/ a wrong lib.

I am confused here. I use the following link switches:

-Wl,-z,relro -Wl,-z,noexecstack -Wl,--no-undefined "g++" -l"pthread" 
-l"wiringPi" -l"gps" -Wl,-z,now

I see serveral libs from dpkg

ii  libgps-dev                         3.16-4 armhf                  
Global Positioning System - development files
ii  libgps22:armhf                     3.16-4 armhf                  
Global Positioning System - library
ii  libgps23:armhf                     3.17-7~bpo9+1 
armhf                  Global Positioning System - library

and

ldconfig -p | grep gps
        libgps.so.23 (libc6,hard-float) => 
/usr/lib/arm-linux-gnueabihf/libgps.so.23
        libgps.so.22 (libc6,hard-float) => 
/usr/lib/arm-linux-gnueabihf/libgps.so.22
        libgps.so (libc6,hard-float) => 
/usr/lib/arm-linux-gnueabihf/libgps.so

Are these the right things supposed 2b there, once installed from Master 
source?

RGDS

hk