[Rd] g++ 4.3 warning: deprecated conversion from string constant to ‘char*’3DIn-Reply-To: <47F4EE2E.6090407 at msu.edu>

[Andrew Finley]

Hi Kurt and Brian,
I was using R 2.6.2. Now, based on your suggestion, I've upgrade to 
2.7.0 and am no longer mixing compilation versions of gcc/g++. The 
constant to char* warnings are gone.
Thanks!
-Andy

Kurt Hornik wrote:
>>>>>> Andrew Finley writes:
> 
>> 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?
> 
> Does this persist in a current version of 2.7.0 alpha?
> 
> Brian recently changed R_ext/Print.h to
> 
> -void Rprintf(char *, ...);
> -void REprintf(char *, ...);
> +void Rprintf(const char *, ...);
> +void REprintf(const char *, ...);
> 
> to deal with this issue.
> 
> Best
> -k
> 
>> 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
> 
>> ______________________________________________
>> R-devel at r-project.org mailing list
>> https://stat.ethz.ch/mailman/listinfo/r-devel
> 
> 

-- 
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