[Rd] g++ 4.3 warning: deprecated conversion from string constant to ‘char*’

[Prof Brian Ripley]

SunStudio has given these warnings for a long time, and we added 
const to several R declarations (most recently Rprintf) to suppress them.
And yes, we noticed that gcc 4.3.0 gave them too.

So what version of R is this?  I don't think 2.7.0 alpha does this.

And I suggest you don't mix 'g++-4.3' with R compiled under gcc 3.4.6 and 
gfortran -- some of the argument passing is incompatible.

On Thu, 3 Apr 2008, Andrew Finley wrote:

> Hello,
> I've noticed that with g++ 4.3 I get the following "warning: deprecated
> conversion from string constant to ‘char*’" when I call e.g.,
> Rprintf("Hello world"); or when I try to define a const char e.g., char
> lower = 'L';
>
> I am wrapping the c++ code in extern "C" {}. This seems to be something
> new with g++ 4.3, because the same code compiled without warnings with
> previous versions.
>
> Has anyone else had theses warnings? Any fixes?
>
> I have included some example output below. Each warning corresponds to
> an Rprintf call.
>
>
> andy at friend:~/Rdevel/tmp$ R CMD SHLIB splmDIC.cpp covmodel.cpp util.cpp
> g++-4.3 -I/usr/local/lib/R/include -I/usr/local/lib/R/include
> -I/usr/local/include    -fpic  -g -O2 -c splmDIC.cpp -o splmDIC.o
> splmDIC.cpp: In function ‘SEXPREC* splmDIC(SEXPREC*, SEXPREC*, SEXPREC*,
> SEXPREC*, SEXPREC*, SEXPREC*, SEXPREC*, SEXPREC*, SEXPREC*, SEXPREC*,
> SEXPREC*, SEXPREC*, SEXPREC*, SEXPREC*, SEXPREC*, SEXPREC*, SEXPREC*,
> SEXPREC*, SEXPREC*, SEXPREC*, SEXPREC*, SEXPREC*, SEXPREC*)’:
> splmDIC.cpp:163: warning: deprecated conversion from string constant to
> ‘char*’
> splmDIC.cpp:164: warning: deprecated conversion from string constant to
> ‘char*’
> splmDIC.cpp:165: warning: deprecated conversion from string constant to
> ‘char*’
> splmDIC.cpp:430: warning: deprecated conversion from string constant to
> ‘char*’
> splmDIC.cpp:431: warning: deprecated conversion from string constant to
> ‘char*’
> g++-4.3 -shared -L/usr/local/lib -o splmDIC.so splmDIC.o covmodel.o
> util.o -L/usr/local/lib/R/lib -lRlapack -L/usr/local/lib/R/lib -lRblas
> -L/usr/lib/gcc/i486-linux-gnu/3.4.6 -lg2c -lm -lgcc_s
>
>
> Thanks for your time.
> Kind regards-
> Andy
>
>
>
> --
> Andrew Finley, PhD
> Natural Resources Building
> Michigan State University
> East Lansing, MI 48824-1222
> Phone: 517-432-7219
> Fax: 517-432-1143
> web: http://blue.for.msu.edu
>
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>

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595