RTEMS 5.1: cmath compiler errors on m68k/uC5282

[Joel Sherrill]

Can you provide a cutdown?

And any idea what those using statements are referring to? I know the
methods in libm but so not understand what it means in the context of using

On Tue, Feb 16, 2021, 4:42 PM Gedare Bloom <gedare at rtems.org> wrote:

> Hi Andrew,
>
> On Tue, Feb 16, 2021 at 1:16 PM Johnson, Andrew N. <anj at anl.gov> wrote:
> >
> > I tried to build the in-progress port of EPICS for the uC5282 BSP last
> night against a release build of RTEMS-5.1 with tools and BSP built using
> RSB. It looks like the g++ cmath routines haven't been configured properly
> for this target. It failed at the first C++ source file includes math.h
> (other BSPs such as the beatnik and qoriq_e500 get further than this, and
> only the pc686 build completely succeeds right now):
> >
> > > /local/anj/RTEMS-5.1/rtems-5.1/bin/m68k-rtems5-g++
> -B/local/anj/RTEMS-5.1/rtems-5.1/m68k-rtems5/uC5282/lib/ -specs bsp_specs
> -qrtems     -mcpu=5282       -D_GNU_SOURCE -D_DEFAULT_SOURCE
> -DUNIX      -O2 -g -ffunction-sections -fdata-sections   -Wall
>  -DMY_DO_BOOTP=NULL    -D__LINUX_ERRNO_EXTENSIONS__
> -DHAVE_SOCKADDR_SA_LEN=1  -I. -I../O.Common -I. -I../osi/compiler/gcc
> -I../osi/compiler/default -I. -I../osi/os/RTEMS-posix -I../osi/os/RTEMS
> -I../osi/os/posix -I../osi/os/default -I.. -I../as -I../bucketLib -I../calc
> -I../cvtFast -I../cppStd -I../cxxTemplates -I../dbmf -I../ellLib -I../env
> -I../error -I../fdmgr -I../flex -I../freeList -I../gpHash -I../iocsh
> -I../log -I../macLib -I../misc -I../osi -I../pool -I../ring -I../taskwd
> -I../timer -I../yacc -I../yacc -I../yajl -I../../../../include/compiler/gcc
> -I../../../../include/os/RTEMS -I../../../../include         -c
> ../cxxTemplates/resourceLib.cpp
>
> I don't see -lm not sure if that is an issue or not, but it seems
> suspect. can you snip out the compiler command line to compare with
> the pc686 build?
>
> > > In file included from
> /local/anj/RTEMS-5.1/rtems-5.1/lib/gcc/m68k-rtems5/7.5.0/include/c++/math.h:36:0,
> > >                  from ../cxxTemplates/resourceLib.h:38,
> > >                  from ../cxxTemplates/resourceLib.cpp:15:
> > >
> /local/anj/RTEMS-5.1/rtems-5.1/lib/gcc/m68k-rtems5/7.5.0/include/c++/cmath:1086:11:
> error: '::acoshl' has not been declared
> > >    using ::acoshl;
> > >            ^~~~~~
> > >
> /local/anj/RTEMS-5.1/rtems-5.1/lib/gcc/m68k-rtems5/7.5.0/include/c++/cmath:1090:11:
> error: '::asinhl' has not been declared
> > >    using ::asinhl;
> > >            ^~~~~~
> > >
> /local/anj/RTEMS-5.1/rtems-5.1/lib/gcc/m68k-rtems5/7.5.0/include/c++/cmath:1094:11:
> error: '::atanhl' has not been declared
> > >    using ::atanhl;
> > >            ^~~~~~
> > >
> > > ... many similar errors snipped ...
> > >
> > >
> /local/anj/RTEMS-5.1/rtems-5.1/lib/gcc/m68k-rtems5/7.5.0/include/c++/cmath:1220:11:
> error: '::tgammal' has not been declared
> > >    using ::tgammal;
> > >            ^~~~~~~
> > >
> /local/anj/RTEMS-5.1/rtems-5.1/lib/gcc/m68k-rtems5/7.5.0/include/c++/cmath:1224:11:
> error: '::truncl' has not been declared
> > >    using ::truncl;
> > >            ^~~~~~
> >
> > There could very well have been errors building the BSP on my part as I
> had to hand-create a uC5282.bset file for RSB to build it:
> >
> > > tux% cat config/5/bsps/uC5282.bset
> > > %define mail_single_report 1
> > >
> > > %define with_rtems_bsp uC5282
> > > %define rtems_target   m68k-rtems5
> > > %define rtems_host     %{rtems_target}
> > >
> > > 5/rtems-m68k
> > > 5/rtems-kernel
> > > 5/rtems-libbsd
> >
> >
> > The libbsd line there might be wrong, but I wouldn’t expect that to
> affect the availability of <cmath> functions to the C++ compiler.
> >
> > Any suggestions?
> >
> > Thanks,
> >
> > - Andrew
> >
> > --
> > Complexity comes for free, simplicity you have to work for.
> >
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> > users at rtems.org
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