[Rcpp-devel] RcppEigen needs 1GB memory to compile

[Dominick Samperi]

Is this really the important thing? Seems like -g0 saves disk space, not memory?
(Loading the symbols into a debugger may require lots of memory, but that
is not the issue here.)

Header-only C++ packages require the compiler to effectively process one
huge source file instead of a bunch of smaller ones, thus the need for a
huge amount of memory in some cases. The suggestion to drop -pipe
might be helpful since it pushes more of the resource use from memory
to disk.

On Mon, Dec 2, 2013 at 2:52 PM, Douglas Bates <bates at stat.wisc.edu> wrote:
> The important thing is to use the -g0 flag.  Even though RcppEigen is  a
> header-only package we include an example R function fastlm. If you leave
> the symbols in the DLL file you get a massive library size whereas stripping
> the symbols provides you with a much smaller file size.  And because
> packages that use RcppEigen only use the headers, not the DLL file, it
> doesn't matter if the symbols are stripped.
>
>
> On Mon, Dec 2, 2013 at 1:31 PM, Dirk Eddelbuettel <edd at debian.org> wrote:
>>
>>
>> On 2 December 2013 at 11:17, Jeroen Ooms wrote:
>> | I noticed that RcppEigen fails to install on my servers because it
>> requires
>> | more than 1gb of memory to compile. Is this expected? Are there any
>> flags or
>>
>> Yes. It also falls over on R-Forge.
>>
>> | options I could set to trade of some memory for cpu? A short simulation:
>>
>> I have had to resort to similar tricks on some smaller architecture when
>> autobuilding demanding Debian packages.  Try -O0 -g0 for a start.
>>
>> Or if you need a smile, this still holds:
>>
>>   http://dilbert.com/strips/comic/1995-06-24/
>>
>> Dirk
>>
>> --
>> Dirk Eddelbuettel | edd at debian.org | http://dirk.eddelbuettel.com
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>
>
>
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