indi-qhy fails to build

[fmozza]

Describe the bug
indi-qhy fails to build as it is attempting to link with with libc-2.29 on ubuntu 18.04. default libc on 18.04 is 2.27.

To Reproduce
build libqhy
build indi-qhy

Expected behavior
indi-qhy binaries should build and be installed

Screenshots
[ 50%] Linking CXX executable indi_qhy_ccd
[ 50%] Linking CXX executable qhy_video_test
[ 50%] Linking CXX executable qhy_ccd_test
/usr/lib/gcc/x86_64-linux-gnu/7/../../../x86_64-linux-gnu/libqhyccd.so: undefined reference to log@GLIBC_2.29' /usr/lib/gcc/x86_64-linux-gnu/7/../../../x86_64-linux-gnu/libqhyccd.so: undefined reference to exp@GLIBC_2.29'
/usr/lib/gcc/x86_64-linux-gnu/7/../../../x86_64-linux-gnu/libqhyccd.so: undefined reference to pow@GLIBC_2.29' collect2: error: ld returned 1 exit status CMakeFiles/qhy_video_test.dir/build.make:96: recipe for target 'qhy_video_test' failed make[2]: *** [qhy_video_test] Error 1 CMakeFiles/Makefile2:141: recipe for target 'CMakeFiles/qhy_video_test.dir/all' failed make[1]: *** [CMakeFiles/qhy_video_test.dir/all] Error 2 make[1]: *** Waiting for unfinished jobs.... /usr/lib/gcc/x86_64-linux-gnu/7/../../../x86_64-linux-gnu/libqhyccd.so: undefined reference to log@GLIBC_2.29'
/usr/lib/gcc/x86_64-linux-gnu/7/../../../x86_64-linux-gnu/libqhyccd.so: undefined reference to exp@GLIBC_2.29' /usr/lib/gcc/x86_64-linux-gnu/7/../../../x86_64-linux-gnu/libqhyccd.so: undefined reference to pow@GLIBC_2.29'
collect2: error: ld returned 1 exit status
CMakeFiles/qhy_ccd_test.dir/build.make:96: recipe for target 'qhy_ccd_test' failed
make[2]: *** [qhy_ccd_test] Error 1
CMakeFiles/Makefile2:67: recipe for target 'CMakeFiles/qhy_ccd_test.dir/all' failed
make[1]: *** [CMakeFiles/qhy_ccd_test.dir/all] Error 2
/usr/lib/gcc/x86_64-linux-gnu/7/../../../x86_64-linux-gnu/libqhyccd.so: undefined reference to exp@GLIBC_2.29' /usr/lib/gcc/x86_64-linux-gnu/7/../../../x86_64-linux-gnu/libqhyccd.so: undefined reference to log@GLIBC_2.29'
/usr/lib/gcc/x86_64-linux-gnu/7/../../../x86_64-linux-gnu/libqhyccd.so: undefined reference to `pow@GLIBC_2.29'
collect2: error: ld returned 1 exit status
CMakeFiles/indi_qhy_ccd.dir/build.make:100: recipe for target 'indi_qhy_ccd' failed
make[2]: *** [indi_qhy_ccd] Error 1
CMakeFiles/Makefile2:104: recipe for target 'CMakeFiles/indi_qhy_ccd.dir/all' failed
make[1]: *** [CMakeFiles/indi_qhy_ccd.dir/all] Error 2
Makefile:129: recipe for target 'all' failed
make: *** [all] Error 2

Desktop (please complete the following information):

• OS: Ubuntu
• Version [e.g. 1.7.6, GIT..etc] 18.04

$ uname -a
Linux cauchy 5.4.0-51-generic #56~18.04.1-Ubuntu SMP Tue Oct 6 09:47:18 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux