undefined reference to `nrf_sdh_enable_request' but the function exists and is referenceable in nrf_sdh.h

[mark waldin]

I combined to examples from the examples library combining the sdk_config, source code, and adding references to the included files.  

The application will not compile and reports:

3> Compiling ‘main.c’
1> Linking quick_stop.elf
1> Output/quick_stop Debug/Obj/main.o: In function `ble_stack_init':
1> C:\nRF\examples\peripheral\quick_stop/main.c:203: undefined reference to `nrf_sdh_enable_request'
Build failed

The reference to nrf_sdh.h which contains the define statemenbt for nrf_sdh_enable_request is found but it reports undefined and I do not understand why it does this.

[RK]

nrf_sdh.h contains the *declaration* of nrf_sdh_enable_request. The *definition* is in nrf_sdh.c which you have to compile and make available to the linker. This is pretty basic C. 

[mark waldin]

I realize that.  Imentioned that the declaration was found in the path and the c source in the same directory should have been found as well.

[RK]

.c files are not found in the path, they are explicitly added to the compile. Header files are located using the include path when the .c file they are #included in is compiled, but you have to add .c files to the Makefile or project or whatever it is you're using.