[Rcpp-devel] Large size of libs directory on some systems

[Dean Bodenham]

Dear Dirk,

Thank you for your last email - your suggestion worked perfectly!

To be clear (for others), creating a ~/.R/Makevars file containing:

DYLIB_LDFLAGS = -shared -fopenmp# $(CFLAGS) $(CPICFLAGS)
SHLIB_CXXLDFLAGS = -shared
SHLIB_CXX1XLDFLAGS = -shared
SHLIB_FCLDFLAGS = -shared
SHLIB_LDFLAGS = -shared# $(CFLAGS) $(CPICFLAGS)
PKG_LIBS= -Wl,-S

(where the first five lines are from /etc/R/Makeconf) resulted in a much
smaller ffstream.so for me on Ubuntu 16.04.

I have just started playing around with Dan's r-stripper, but have not
quite got it working yet.

Dean

On Sat, Nov 26, 2016 at 4:59 PM, Dan Dillon <dcdillon at gmail.com> wrote:

> Dean,
>
> I too have been concerned about this and working on a solution for some
> time.  I just formalized my work and put it in a repo at
> https://github.com/dcdillon/r-stripper.  Basically this script adds the
> appropriate commands to the PKG_LIBS variable to cause the linker to strip
> the debugging symbols from the shared library that is created.
>
> Feel free to try it out.  Right now it only knows how to do this for gcc,
> g++, clang, and clang++ but adding others is no problem as long as I know
> how to figure out which linker it is and know the option to pass to the
> linker to achieve "stripping".
>
> Thanks,
>
> Dan
>
> On Sat, Nov 26, 2016 at 7:55 AM, Dirk Eddelbuettel <edd at debian.org> wrote:
>
>>
>> On 26 November 2016 at 12:22, Dean Bodenham wrote:
>> | Dear Dirk,
>> |
>> | Thank you very much for your detailed replies!
>> |
>> | The Ubuntu system does indeed seem to be using the -g flag. I did try a
>> local
>> | compile/installation with the ~/.R/Makevars file you suggested, but
>> couldn't
>> | quite get it to work - I get warnings "linking not done" for the .o
>> files, and
>> | then an error that the "ffstream.so" file is not found.
>>
>> Well "it worked me for" but a better approach entirely outside of your
>> package may be to take
>>
>>   edd at max:~$ grep shared /etc/R/Makeconf
>>   DYLIB_LDFLAGS = -shared -fopenmp# $(CFLAGS) $(CPICFLAGS)
>>   SHLIB_CXXLDFLAGS = -shared
>>   SHLIB_CXX1XLDFLAGS = -shared
>>   SHLIB_FCLDFLAGS = -shared
>>   SHLIB_LDFLAGS = -shared# $(CFLAGS) $(CPICFLAGS)
>>   edd at max:~$
>>
>> and add them to ~/.R/Makevars as
>>
>>   DYLIB_LDFLAGS = -shared -fopenmp# $(CFLAGS) $(CPICFLAGS)
>>   SHLIB_CXXLDFLAGS = -shared
>>   SHLIB_CXX1XLDFLAGS = -shared
>>   SHLIB_FCLDFLAGS = -shared
>>   SHLIB_LDFLAGS = -shared# $(CFLAGS) $(CPICFLAGS)
>>
>> When I do that without/with the change I get
>>
>>   edd at max:/tmp/ffstream$ ls -lh ffstream*/src/ffstream.so
>>   -rwxrwxr-x 1 edd edd 9.0M Nov 26 07:52 ffstream.orig/src/ffstream.so
>>   -rwxrwxr-x 1 edd edd 734K Nov 26 07:52 ffstream/src/ffstream.so
>>   edd at max:/tmp/ffstream$
>>
>> I think it is an issue worth raising with on r-devel and I may do so.
>>
>> Dirk
>>
>> --
>> http://dirk.eddelbuettel.com | @eddelbuettel | edd at debian.org
>> _______________________________________________
>> Rcpp-devel mailing list
>> Rcpp-devel at lists.r-forge.r-project.org
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>>
>
>
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