Error in compiling RW libs with g++

Question

Hi All,
I am trying to port one project from Solaris (CC) to gcc, which uses RWlibs (of Tools.h++ which comes along with the sunstudio package).
I am working on RHEL 5.4.
As a first step i am trying my hand with the following simple program:
#include <iostream>
#include <rw/cstring.h>
int main(){
  RWCString a("TEST Program compiled successfully with gcc");
  std::cout << a << std::endl;
  return 0;
}when i tried to compile the above sample program i got the following:
$ g++ -Wall -g rwstring.cc -I/app/sunstudio12/prod/include/CC/rw7
/app/sunstudio12/prod/include/CC/rw7/rw/generic.h:80: error: ISO C++ forbids declaration of ‘genericerror’ with no type
/app/sunstudio12/prod/include/CC/rw7/rw/rstream.h:46: error: expected initializer before ‘&’ token
/app/sunstudio12/prod/include/CC/rw7/rw/cstring.h:378: error: ISO C++ forbids declaration of ‘istream’ with no type
/app/sunstudio12/prod/include/CC/rw7/rw/cstring.h:378: error: expected ‘;’ before ‘&’ token
/app/sunstudio12/prod/include/CC/rw7/rw/cstring.h:379: error: ISO C++ forbids declaration of ‘istream’ with no type
/app/sunstudio12/prod/include/CC/rw7/rw/cstring.h:379: error: expected ‘;’ before ‘&’ token
/app/sunstudio12/prod/include/CC/rw7/rw/cstring.h:381: error: ISO C++ forbids declaration of ‘istream’ with no type
/app/sunstudio12/prod/include/CC/rw7/rw/cstring.h:381: error: expected ‘;’ before ‘&’ token
/app/sunstudio12/prod/include/CC/rw7/rw/cstring.h:382: error: ISO C++ forbids declaration of ‘istream’ with no type
/app/sunstudio12/prod/include/CC/rw7/rw/cstring.h:382: error: expected ‘;’ before ‘&’ token
/app/sunstudio12/prod/include/CC/rw7/rw/cstring.h:383: error: ISO C++ forbids declaration of ‘istream’ with no type
/app/sunstudio12/prod/include/CC/rw7/rw/cstring.h:383: error: expected ‘;’ before ‘&’ token
/app/sunstudio12/prod/include/CC/rw7/rw/cstring.h:480: error: expected constructor, destructor, or type conversion before ‘&’ token
/app/sunstudio12/prod/include/CC/rw7/rw/cstring.h:481: error: expected constructor, destructor, or type conversion before ‘&’ tokenAny help/suggestions is appreciated.
Thanks in advance,
14341

Answer 1

RW Tools.h++ is a very old product, which has not had significant updates in many years. Most of the functionality in RW Tools.h++ is available in other libraries, although the programming interface is different. (That is, if you have code written for RW Tools.h++, it will need to be re-written.) You can buy the library from Rogue Wave (roguewave.com) if you want to use it with g++ or other compilers.
Much of the functionality of RW Tools.h++ is in the C++ Standard library. The Boost libraries are a good addition for anything else that you need.
The SGI STL and the Apache stdcxx libraries are replacements for the C++ standard library that comes with your C++ compiler. If you download one of these libraries, you will have quite an adventure getting it to build and work correctly with the Studio C++ compiler. But we have already done that work for you. The -library=stlport4 option picks up the STLport version of the SGI STL, and it comes with the compiler. The Apache stdcxx library is available with Solaris 11 for use with Studio C++. Install it in the default locations (in /usr/include and /usr/lib), and use the -library=stdcxx4 option for compiling and linking. Refer to the C++ Users Guide for details about using these alternative libraries.
For g++, using the SGI STL is not a good idea. You can use Apache stdcxx if you want, but the standard library that comes with g++ is a good one, so I would not recommend replacing it unless you have a specific reason.
Boost works very well with g++, since it is developed with and tested with g++. Be sure to check your g++ version with any notes about compilers in the version of Boost that you get.