Problem while linking rtems-libbsd with application

[vivek kukreja]

> On 13-Feb-2017, at 12:36, vivek kukreja <vivekkukreja5 at gmail.com> wrote:
> 
> Hello Chris,
> 
> I have tried compiling the app with -lm flag but to no avail. I think the rtems-libbsd waf build process has to be modified a bit to link sfp.c using the -lm flag. I tried altering the libbsd waf script but couldn't fix the error. I'm trying to fix it and any help is greatly appreciated. :)

Nevermind.
I cloned and reinstalled the latest rtems-libbsd and now the app compiles using the -lm flag. Thanks a lot!

> Regards,
> Vivek
> 
>>> On 09-Feb-2017, at 07:54, Chris Johns <chrisj at rtems.org> wrote:
>>> 
>>> On 09/02/2017 09:54, vivek kukreja wrote:
>>> Hello all,
>> 
>> Hello and welcome back to RTEMS.
>> 
>>> 
>>> I have setup rtems for arm/xilinx_zynq_a9_qemu pair and installed
>>> rtems-libbsd. Im trying to run NFS in an application but i get an
>>> error while linking libbsd drivers. I use the following commands to
>>> compile the application:
>>> 
>>> arm-rtems4.12-gcc -B../../../../../xilinx_zynq_a9_qemu/lib/ -specs
>>> bsp_specs -qrtems -DHAVE_CONFIG_H -I.
>>> -I/home/vivek/sandbox/rtems/c/src/../../testsuites/samples/fileio -I..
>>> -I/home/vivek/sandbox/rtems/c/src/../../testsuites/samples/../support/include
>>> -I/home/vivek/sandbox/rtems-libbsd/rtemsbsd/include
>>> -I/home/vivek/sandbox/rtems-libbsd/freebsd/include
>>> -I/home/vivek/sandbox/rtems-libbsd/freebsd/sys   -march=armv7-a
>>> -mthumb -mfpu=neon -mfloat-abi=hard -mtune=cortex-a9 -O0 -g
>>> -ffunction-sections -fdata-sections -Wall -Wmissing-prototypes
>>> -Wimplicit-function-declaration -Wstrict-prototypes -Wnested-externs
>>> -MT init.o -MD -MP -MF .deps/init.Tpo -c -o init.o
>>> /home/vivek/sandbox/rtems/c/src/../../testsuites/samples/fileio/init.c
>>> mv -f .deps/init.Tpo .deps/init.Po
>>> arm-rtems4.12-gcc -B../../../../../xilinx_zynq_a9_qemu/lib/ -specs
>>> bsp_specs -qrtems -march=armv7-a -mthumb -mfpu=neon -mfloat-abi=hard
>>> -mtune=cortex-a9 -O0 -g -ffunction-sections -fdata-sections -Wall
>>> -Wmissing-prototypes -Wimplicit-function-declaration
>>> -Wstrict-prototypes -Wnested-externs  -Wl,--gc-sections
>>> -march=armv7-a -mthumb -mfpu=neon -mfloat-abi=hard -mtune=cortex-a9
>>> -o fileio.exe init.o
>>> /home/vivek/sandbox/rtems-libbsd/build/arm-rtems4.12-xilinx_zynq_a9_qemu/libbsd.a
>>> 
>>> I'm getting the following error:
>>> 
>>> /home/vivek/sandbox/rtems-libbsd/build/arm-rtems4.12-xilinx_zynq_a9_qemu/libbsd.a(sfp.c.12.o):
>>> In function `convert_sff_power':
>>> /home/vivek/sandbox/rtems-libbsd/build/arm-rtems4.12-xilinx_zynq_a9_qemu/../../freebsd/sbin/ifconfig/sfp.c:614:
>>> undefined reference to `log10'
>>> 
>>> I think this is a linking issue(in the rtems-libbsd build) and i'm
>>> reinstalling libbsd to double-check. If anyone has come across this
>>> error before please help me resolve it.
>>> 
>> 
>> Try adding -lm to the libraries you need to link with. It looks to me like the recent changes Sebastian has made with libbsd has added a dependence on the libm.a library.
>> 
>> Chris
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