WickedShell
commented
8 years ago I wouldn't expect much of stdlib to be present when cross compiling for an embedded arm, and past experience says what is there will have very specific notes on what bits behave as you expect, and what has been omitted for performance/memory/implementation reasons.
On Sat, Dec 5, 2015 at 1:19 AM, Tom Pittenger notifications@github.com wrote:
Contrary to common sense, atof() "Ascii to float" does not return a float, it returns a double. It's used in a few places where a float is expected so the correct strtof() "string to float" should replace it. However replacing it atof(str) with strtof(str, NULL), and including stdlib.h, the function is not found? Oddly, strtod() works.
This is when building in Eclipse with g++ 4.8.1 on the px4 env, win7, mingw32. When I built in Ubuntu with git 4.9.1 for SITL it works fine. Perhaps the problem is in arm-none-eabi-g++.exe?
— Reply to this email directly or view it on GitHub https://github.com/diydrones/ardupilot/issues/3285.
magicrub
OXINARF
Contrary to common sense, atof() "Ascii to float" does not return a float, it returns a double. It's used in a few places where a float is expected so the correct strtof() "string to float" should replace it. However replacing it atof(str) with strtof(str, NULL), and including stdlib.h, the function is not found? Oddly, strtod() works.
This is when building in Eclipse with g++ 4.8.1 on the px4 env, win7, mingw32. When I built in Ubuntu with git 4.9.1 for SITL it works fine. Perhaps the problem is in arm-none-eabi-g++.exe?