Support for logf, sinf and cosf in libuClibc (uClibc0.9.27)

[Khem Raj]

On 9/20/17 11:50 PM, monika wadekar wrote:
> Hi there,
> 
> I am trying to build qt-webkit v4.5.3 for ARM platform (iwmmxt) using
> uClibc0.9.27 cross toolchain.
> 
> However I am getting following errors at the time of running make
> (Configure was successfull):
> 
> "qt-embedded-linux-opensource-src-4.5.3/lib/libQtGui.so: undefined
> reference to `logf'"
> "qt-embedded-linux-opensource-src-4.5.3/lib/libQtGui.so: undefined
> reference to `cosf'"
> "qt-embedded-linux-opensource-src-4.5.3/lib/libQtGui.so: undefined
> reference to `sinf'"
> 
> I think the defination of these functions is not present in uClibc0.9.27.
> If my understanding is correct, can you please help me add these
> definations in uClibc v0.9.27. Is there any workaround/patch to get rid of
> these errors.
> 
> Kindly note that I do not have an option to use any other uClibc version
> due to qt version and ARM processor dependencies.
> 
> Any help/pointers will be highly appreciated.

These should be coming from libm, so first thing is to check if your 
linker cmdline has -lm or not. if it does then these are really missing, 
I would suggest to look at latest uclibc master and do the needed backports.