undefined reference to `floor`

[Peng Fan]

2013/9/16 Sebastian Huber <sebastian.huber at embedded-brains.de>

> On 2013-09-16 12:25, Peng Fan wrote:
>
>> hi,
>>
>> I want to use math function in rtems, and add such a function:
>>   77 int test(float a)
>>   78 {
>>   79     int b= floor(a);
>>
>
> The prototype is "double floor(double x)".  Please have a look at floorf().

still fail.


>
>
>    80     return b;
>>   81 }
>> When compiling, it tells 'undefined reference to `floor'
>> collect2: error: ld returned 1 exit status'
>>
>> I do not know how to resolve this. I tried to pass `-lm` to gcc, but still
>> failed to link.
>>
>
> Can you please provide the full command line?
>

/opt/rtems-4.11/bin/sparc-rtems4.11-gcc -qrtems
-B/opt/rtems-4.11/sparc-rtems4.11/lib/
-B/opt/rtems-4.11/sparc-rtems4.11/sis/lib/ --specs bsp_specs -mcpu=cypress
-O2 -g -Wall -Wmissing-prototypes -Wimplicit-function-declaration
-Wstrict-prototypes -Wnested-externs init.c.5.o main.c.5.o
fs-root-tarfile.o -o rtld.prelink -Wl-Bstatic -L. -lrtl -Wl,-Bdynamic

This is the command. Thanks.

>
>
> --
> Sebastian Huber, embedded brains GmbH
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