[R-pkg-devel] Weird MAKEFLAGS bug

[Costas Tsirogiannis]

Thanks a lot, indeed it worked using the Makevars file. I still do not
understand why the command-line input fails but so be it.

One more quick question: if I include the Makevars file in my package code
then the requested flags are used every time somebody installs my package
in his system. However, -O2 is a gcc-specific flag so it won't work for
every compiler. Is there a simple way to declare another optimization flag
in Makevars, that works for all compilers?

Thanks for all the help,

--Constantinos

On 10 January 2017 at 12:39, Dirk Eddelbuettel <edd at debian.org> wrote:

>
> On 10 January 2017 at 11:55, Costas Tsirogiannis wrote:
> | Greetings and thanks for previously offered solutions,
> |
> | I am developing a package that makes use of C++ code, and I want to
> compile
> | this code for testing reasons with the "R CMD SHLIB" command. Using
> Ubuntu
> | and gcc 5.4, and because for certain reasons I have to use the c++0x
> | standard, I try the following command:
> |
> | > MAKEFLAGS='CXXFLAGS=-std=c++0x -lpthread -O2' R CMD SHLIB
> MyMainCode.cpp
> |
> | For some weird reason, flag -O2 is not recognized properly and I get the
> | following error message:
> |
> | > make: *** unknown output-sync type '2'.  Stop.
> |
> | If I try -O3, I get "unknown output-sync type '3' ", and so on.
> Everything
> | works fine if I drop this optimization flag. Could you suggest a
> workaround
> | for that?
>
> Sounds weird. Wonder if something else could go on here.
>
> But in general, using ~/.R/Makevars is better.  Try that.
>
> edd at max:~$ grep FLAGS ~/.R/Makevars | grep -v "^#"
> CFLAGS +=              -O3 -Wall -pipe -pedantic -std=gnu99
> CXXFLAGS +=           -O3 -Wall -pipe -Wno-unused -pedantic
> FFLAGS += -O3 -g0 -Wall -pipe
> FCFLAGS += -O3 -g0 -Wall -pipe
> CXX1XFLAGS=-O3 -Wall -pipe -Wno-unused -pedantic
> FLAGS=-Wall -O3
> DYLIB_LDFLAGS = -Wl,-S -shared -fopenmp# $(CFLAGS) $(CPICFLAGS)
> SHLIB_CXXLDFLAGS = -Wl,-S -shared
> SHLIB_CXX1XLDFLAGS = -Wl,-S -shared
> SHLIB_FCLDFLAGS = -Wl,-S -shared
> SHLIB_LDFLAGS = -Wl,-S -shared# $(CFLAGS) $(CPICFLAGS)
> edd at max:~$
>
> Dirk
>
> --
> http://dirk.eddelbuettel.com | @eddelbuettel | edd at debian.org
>

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