converting Keil MDK-lite to OSX GNU problem.

RE: converting Keil MDK-lite to OSX GNU problem.

Johannes Lorenz — Tue, 31 Jan 2017 19:47:08 GMT

Hi, to solve undefined reference to `sqrt' your need to link with the -lm option. The placement of this option is important (see gcc reference) and should be just before the -o option. As an example, see this modified MAKEFILE section:

nrf51422_xxac_s110: $(BUILD_DIRECTORIES) $(OBJECTS) @echo Linking target: $(OUTPUT_FILENAME).out $(NO_ECHO)$(CC) $(LDFLAGS) $(OBJECTS) $(LIBS) -lm -o $(OUTPUT_BINARY_DIRECTORY)/$(OUTPUT_FILENAME).out

HTH Johannes

RE: converting Keil MDK-lite to OSX GNU problem.

Vidar Berg — Tue, 29 Sep 2015 10:52:15 GMT

Looks like you are missing some libraries since you get undefined references. You can try to add 'LDFLAGS += --specs=nano.specs -lc -lnosys -lm' to your makefile

RE: converting Keil MDK-lite to OSX GNU problem.

Stian Røed Hafskjold — Tue, 29 Sep 2015 08:21:33 GMT

I would suggest the same as RK, to start with the Makefiles included in the SDK examples.

RE: converting Keil MDK-lite to OSX GNU problem.

RK — Sun, 20 Sep 2015 01:55:55 GMT

My guess is that you have different flags for compilation and linking and have either a different architecture or a different floating point library flag between the two stages.

Why don't you start with the gcc examples in the SDK and use those as a base for developing your makefiles, since they work.