How can I add LDFLAGS for bsp build?

[Y. HB]

Hi Sebastian,

Which way is a preferable way to add  -lm for a BSP ?  change bsp_specs ?

On Mon, Jul 25, 2022 at 10:52 PM Sebastian Huber <
sebastian.huber at embedded-brains.de> wrote:

> On 25/07/2022 16:47, Y. HB wrote:
> >
> > ['/home/hongbo/Developer/Embedded/rtems/5/bin/arm-rtems5-gcc',
> > '-qrtems', '-B/home/hongbo/Developer/Embedded/rtems/5/arm-rtems5/lib/',
> >
> '-B/home/hongbo/Developer/Embedded/rtems/5/arm-rtems5/tms570lc4357_launchxl/lib/',
>
> > '--specs', 'bsp_specs', '-march=armv7-r', '-mthumb', '-mbig-endian',
> > '-mfpu=vfpv3-d16', '-mfloat-abi=hard', '-ffunction-sections',
> > '-fdata-sections', '-MMD', 'test.c.1.o',
> >
> '-o/home/hongbo/Developer/Embedded/rtems/app/hello/build/.conf_check_261484d99ea5da27480d47dee9a30c04/testbuild/testprog',
>
> > '-Wl,-Bstatic', '-Wl,-Bdynamic', '-Bstatic -lm']
> > err:
> >
> /home/hongbo/Developer/Embedded/rtems/5/lib/gcc/arm-rtems5/7.5.0/../../../../arm-rtems5/bin/ld:
>
> >
> /home/hongbo/Developer/Embedded/rtems/5/arm-rtems5/tms570lc4357_launchxl/lib/librtemsbsp.a(HL_sci.o):
>
> > in function `sciSetBaudrate':
> >
> /home/hongbo/Developer/Embedded/rtems/build/tms570lc4357/arm-rtems5/c/tms570lc4357_launchxl/lib/libbsp/arm/tms570/../../../../../../../../../rtems-master/c/src/lib/libbsp/arm/tms570/../../../../../../bsps/arm/tms570/start/tms570lc4357/source/HL_sci.c:284:
>
> > undefined reference to `floor'
> > collect2: error: ld returned 1 exit status
>
> This is a problem with the search order of the libraries. The -lrtemsbsp
> is implicitly given by the --specs bsp_specs. You can try this:
>
> -lrtemsbsp -lm
>
> Alternatively, avoid the use of floating point operations and the
> floor() function.
>
> --
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