I have cross compiled gRPC (v1.27.3) for QNX 7 (ARM) platform. I am using the protobuf which was already available for 
our system (QNX ARM v3.11.4).

After compiling it generated the binaries. I copied these binaries in our code to compile the application for QNX.
We are using cmake to compile QNX runtime code.

While compiling QNX I am getting this issue:
../../lib/libQAic.so: undefined reference to `inet_pton(int, char const*, void*)'
../../lib/libQAic.so: undefined reference to `gai_strerror(int)'
../../lib/libQAic.so: undefined reference to `clock_gettime(int, timespec*)'
../../lib/libQAic.so: undefined reference to `fcntl(int, int, ...)'
../../lib/libQAic.so: undefined reference to `unsetenv(char const*)'
../../lib/libQAic.so: undefined reference to `setenv(char const*, char const*, int)'
../../lib/libQAic.so: undefined reference to `nanosleep(timespec const*, timespec*)'
../../lib/libQAic.so: undefined reference to `stat(char const*, stat*)'
../../lib/libQAic.so: undefined reference to `pthread_cond_timedwait(_sync*, _sync*, timespec const*)'
../../lib/libQAic.so: undefined reference to `read(int, void*, unsigned long)'
../../lib/libQAic.so: undefined reference to `inet_ntop(int, void const*, char*, unsigned int)'
../../lib/libQAic.so: undefined reference to `pipe(int*)'
../../lib/libQAic.so: undefined reference to `write(int, void const*, unsigned long)'
../../lib/libQAic.so: undefined reference to `unlink(char const*)'
../../lib/libQAic.so: undefined reference to `close(int)'
../../lib/libQAic.so: undefined reference to `sysconf(int)'
../../lib/libQAic.so: undefined reference to `getaddrinfo(char const*, char const*, addrinfo const*, addrinfo**)'
../../lib/libQAic.so: undefined reference to `freeaddrinfo(addrinfo*)'
collect2: error: ld returned 1 exit status
test/kmd/CMakeFiles/qaic_json_test.dir/build.make:117: recipe for target 'test/kmd/qaic_json_test' failed
make[2]: *** [test/kmd/qaic_json_test] Error 1
CMakeFiles/Makefile2:1012: recipe for target 'test/kmd/CMakeFiles/qaic_json_test.dir/all' failed
make[1]: *** [test/kmd/CMakeFiles/qaic_json_test.dir/all] Error 2
make[1]: *** Waiting for unfinished jobs....

These all functions are already in libc. But they are not able to find it. The path is already included in environment 
variable, where libc is available. But still did not able to find it.

Can anybody help me on this?