Userspace alternative to gpstime kernel module

This code can be used when models run in userspace and without GPS hardware. It removes the dependency on the special device file /dev/gpstime. GPS time is obtained in userspace from the system clock. Enable at compile time by defining USE_GPSCLOCK. When building a model, add userspacegps=1 to the CDS parameters.

src/drv/CMakeLists.txt

@@ -9,4 +9,8 @@ add_library(driver::shmem ALIAS shmem)
 add_library(ini_parsing STATIC param.c crc.c)
 target_include_directories(ini_parsing PUBLIC
         ${CMAKE_CURRENT_SOURCE_DIR}/../include)
-add_library(driver::ini_parsing ALIAS ini_parsing)
\ No newline at end of file
+add_library(driver::ini_parsing ALIAS ini_parsing)
+
+add_library(gpsclock STATIC gpsclock.c)
+target_include_directories(gpsclock PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/../include)
+add_library(driver::gpsclock ALIAS gpsclock)