[Rcpp-devel] R.e. Debugging Rcpp packages with GDB

[Davor Cubranic]

To follow up my original post, it is possible to define GDB pretty-printers using Python. (See http://sourceware.org/gdb/onlinedocs/gdb/Pretty-Printing.html.) Would people be interested in having Rcpp-specific pretty printers?

Davor

On 2011-01-19, at 7:01 AM, Dirk Eddelbuettel wrote:

> 
> On 19 January 2011 at 08:43, Douglas Bates wrote:
> | > | 2) Is there a simple way to include debugging symbols/keep values from
> | > | getting optimized out when building with Rcpp?
> | >
> | > You could always include -g and then strip what you don't need -- which is
> | > what Debian and Ubuntu do to give you the *-dbg packages.
> | >
> | > R sits on top of Makefile logic, and make is pretty powerful language.  You
> | > can (literally) do just about anything....   Setting CFGLAGS / CXXFLAGS or
> | > their PKG_* variants is probably easiest.
> | 
> | Or create a file $HOME/.R/Makevars and define CXXFLAGS and CFLAGS in
> | there.  I have the following contents
> | 
> | CFLAGS= -g -pipe -std=gnu99 -Wall -pedantic
> | CFLAGS= -g -O3 -pipe -std=gnu99 -Wall -pedantic
> | CXXFLAGS= -g -pipe -Wall -pedantic
> | CXXFLAGS= -g -pipe -std=c++0x -Wall -pedantic
> | CXXFLAGS= -g -O3 -pipe -Wall -pedantic
> | CXXFLAGS= -g -O3 -pipe -std=c++0x -Wall -pedantic
> | 
> | and comment out the trailing lines if I want to suppress the c++0x
> | standard or the optimization when using the debugger.
> 
> Seconded. 
> 
> That is actually what I do, including the better-than-awesome ccache:
> 
> edd at max:~$ cat .R/Makevars
> # edd 03 Mar 2009
> 
> ## for C code
> CFLAGS=-g -O3 -Wall -pipe -pedantic -std=gnu99
> #CFLAGS=-O3 -g0 -Wall -pipe -std=gnu99
> ## for C++ code
> CXXFLAGS= -g -O3 -Wall -pipe -pedantic -Wno-variadic-macros
> #CXXFLAGS= -g0 -O3 -Wall -pipe -Wno-variadic-macros
> #CXXFLAGS= -O3 -g0 -Wall -pipe 
> ## for Fortran code
> #FFLAGS=-g -O3 -Wall -pipe
> FFLAGS=-O3 -g0 -Wall -pipe
> ## for Fortran 95 code
> #FCFLAGS=-g -O3 -Wall -pipe
> FCFLAGS=-O3 -g0 -Wall -pipe
> 
> CC=ccache gcc
> CXX=ccache g++
> FC=ccache gfortran
> F77=ccache gfortran
> MAKE=make -j4
> edd at max:~$ 
> 
> 
> The -Wno-variadic-macros was once needed when Romain was a tad more
> aggressive in trying new C++0x features.  
> 
> The 'make -j4' also takes care of parallel builds.
> 
> Dirk
> 
> -- 
> Dirk Eddelbuettel | edd at debian.org | http://dirk.eddelbuettel.com
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