On Tue, Feb 16, 2021 at 5:50 PM Johnson, Andrew N. <a...@anl.gov> wrote:
> On Feb 16, 2021, at 5:26 PM, Joel Sherrill <j...@rtems.org> wrote:
>
>
> Can you provide a cutdown?
>
>
> Sure, it’s 1 line of source:
>
> *tux% *cat m.cpp
> #include <cmath>
>
>
I can confirm this one-liner compilers on every rtems 5 and 6 gcc target
including m68k but when you add mcpu=5282 to either the rtems 5 or 6 gcc it
does not compile.
The next step would be to look at the multilib directories selected by
that. Something must be different about that vs the default (m68020 w/FPU).
Luckily I had 4.11 tools laying around and I can report it works with the
4.11 GCC. Bad news, is that it is gcc 4.9.3 versus gcc 7. I suspect an
examination of what that compiler did versus the new one will highlight the
issue. Then we have to look at the config/m68k/t-* files RTEMS uses for
changes.
[joel@devel cmath]$
/home/joel/rtems-cron-411/tools/4.11/bin//m68k-rtems4.11-gcc -c -mcpu=5282
m.cc
[joel@devel cmath]$
/home/joel/rtems-cron-411/tools/4.11/bin//m68k-rtems4.11-gcc --version
m68k-rtems4.11-gcc (GCC) 4.9.3 20150626 (RTEMS 4.11, RSB
158ad680aed1c4fd00f00d5b0e269391597872ef, Newlib 2.2.0.20150423)
I'm afraid I did the quick part since I had the tools. Gedare.. can you do
some version comparison and gcc git archeology? Just chat me and we can run
this down.
--joel
>
> which when compiled:
>
> *tux% */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 -Wall -c m.cpp
> In file included from *m.cpp:1:0*:
>
> */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*;
> *^~~~~~*
>
>
> Long list of errors truncated as before.
>
> 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
>
>
> I think that's how you ask C++ to import symbols into the current
> namespace (they are all inside a namespace std {...} block), but I’m not
> a C++ expert. In any case they come from gcc. EPICS probably doesn’t need
> any of the missing functions which look to have been added by C99, but we
> do need to be able to pull in math.h and/or cmath from C++ code.
>
> - Andrew
>
>
> On Tue, Feb 16, 2021, 4:42 PM Gedare Bloom <ged...@rtems.org> wrote:
>
>> Hi Andrew,
>>
>> On Tue, Feb 16, 2021 at 1:16 PM Johnson, Andrew N. <a...@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.
>> >
>> > _______________________________________________
>> > users mailing list
>> > users@rtems.org
>> > http://lists.rtems.org/mailman/listinfo/users
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>
>
> --
> Complexity comes for free, simplicity you have to work for.
>
>
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