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I am trying to use the "math.h" library so I can do pow( double, double) and log10 (double) functions,
I have tried #include "math.h" and also #include <math.h> in the main.c file and when I compile it gives me this error:
C:\Cypress\Projects\Bonding\BLE_Bonding\BLE_Bonding\BLE_Bonding.cydsn/.\main.c:283: undefined reference to `pow'
collect2.exe: error: ld returned 1 exit status
The command 'arm-none-eabi-gcc.exe' failed with exit code '1'.
Is this from some kind of tool setting? I don't know what I did, this was actually working yesterday, then magically decided to stop and give me compile errors.
I get the same undefined reference error if I try to use the log10() function as well.
just wondering if some how I fat fingered a bad keyboard sequence or did something similar to disable something on the tool, ?? OR did the tool do some kind of autoupdate and break something without my knowledge ( I did not manually update anything)
the source file math.h still exists in the directory: C:\Program Files (x86)\Cypress\PSoC Creator\3.3\PSoC Creator\import\gnu\arm\4.9.3\arm-none-eabi\include
Or did the compile #define Symbols change? In the math.h file itself there are #defines that possibly are breaking something?
Solved! Go to Solution.
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from another thread, I found this and tried it and it is the correct answer:
In Creator go to Project -> Build Settings -> Linker -> General
Add "m" (without the quotes) into Additional Libraries. This will add the math library "Libm.a" to your project.
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from another thread, I found this and tried it and it is the correct answer:
In Creator go to Project -> Build Settings -> Linker -> General
Add "m" (without the quotes) into Additional Libraries. This will add the math library "Libm.a" to your project.
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Hi
Adding the 'm' to the Additional Libraries (Build Settings->Linker) should solve the problem.