C++Talk.NET C++ language newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  How can I write C++ code for Windows/Linux          C++Talk.NET Forum Index -> C++ Language (Moderated) View previous topic :: View next topic   Author Message silviu Guest Posted: Wed Oct 29, 2003 4:41 pm    Post subject: How can I write C++ code for Windows/Linux Hi All, I have to write C++ code that can be compiled (and run) on both Windows and Linux/Unix OS's. Could someone give me hints, links, info on this matter? Thanks in advance for any help. Silviu [ See http://www.gotw.ca/resources/clcm.htm for info about ] [ comp.lang.c++.moderated. First time posters: Do this! ] Back to top Thomas Mooney Guest Posted: Thu Oct 30, 2003 5:34 am    Post subject: Re: How can I write C++ code for Windows/Linux silviu <thelinuxguy1997 (AT) yahoo (DOT) com> wrote Quote: Hi All, I have to write C++ code that can be compiled (and run) on both Windows and Linux/Unix OS's. Could someone give me hints, links, info on this matter? Thanks in advance for any help. Silviu Perhaps this would be helpful: www.wxwindows.org -- TFM3 Note: Spam-resistant e-mail address [ See http://www.gotw.ca/resources/clcm.htm for info about ] [ comp.lang.c++.moderated. First time posters: Do this! ] Back to top Ben Hutchings Guest Posted: Thu Oct 30, 2003 5:40 am    Post subject: Re: How can I write C++ code for Windows/Linux In article <f53c2ba1.0310281425.755cc01 (AT) posting (DOT) google.com>, silviu wrote: Quote: Hi All, I have to write C++ code that can be compiled (and run) on both Windows and Linux/Unix OS's. Could someone give me hints, links, info on this matter? The simplest way to do this is just to write portable code - don't assume anything about implementation-defined, unspecified or undefined behaviour and don't use any functions or classes outside the standard library. Also, if you can, avoid using old compilers that don't support the standard well, e.g. g++ versions before 3.2 and VC++ before 7.0. Not only do these not provide all the standard language and library features, they provide non-standard extensions that you might find yourself using by accident. In practice most application require functionality beyond what the standard defines. Even if that functionality exists in most operating systems, the APIs to it differ. This means that the application must use different code when built under different implementations. There are several ways to do this, including: 1. Put implementation-specific code within #if...#endif blocks where the #if directive tests a macro or macros that are pre-defined under particular implementations, e.g. _WIN32 for Windows-specific code. 2. Put implementation-specific code in separate files. Select between these in the makefile or similar file controlling the build process. 3. Use a third-party library which has already been ported to the implementations you want to use. For example, the standard says nothing about directories, though most filing systems support them. On Windows you must use CreateDirectory to create a directory and if it fails use GetLastError to find out what went wrong. On Unix you must use mkdir and then check errno. Of course the error codes are different too - so it's a lot of work to produce a common interface. In this case one can use the Boost.Filesystem library <http://www.boost.org/filesystem/>, which provides a common interface to Win32 and POSIX file-systems (and potentially others). There are too many differences between Windows and Unix APIs for me to enumerate them, so I shan't attempt to. I can only suggest some libraries to investigate: - ACE <http://www.cs.wustl.edu/~schmidt/ACE.html> - Boost <http://www.boost.org/> - gtkmm <http://www.gtkmm.org/> - wxWindows <http://www.wxwindows.org/> There's a longer list at <http://vipe.technion.ac.il/~shlomif/abstraction/>. [ See http://www.gotw.ca/resources/clcm.htm for info about ] [ comp.lang.c++.moderated. First time posters: Do this! ] Back to top Michael J. Reeves, AA, AS Guest Posted: Thu Oct 30, 2003 3:23 pm    Post subject: Re: How can I write C++ code for Windows/Linux On 29 Oct 2003 11:41:00 -0500, [email]thelinuxguy1997 (AT) yahoo (DOT) com[/email] (silviu) wrote: Quote: Hi All, I have to write C++ code that can be compiled (and run) on both Windows and Linux/Unix OS's. Could someone give me hints, links, info on this matter? Thanks in advance for any help. A key issue is PORTABILITY. To ensure portability, you must use a library that is common to ALL ISO/ANSI compilers. Typically, this is the Standard Template Library (STL ). Check out the references and links at: http://www.cs.rpi.edu/projects/STL/htdocs/stl.html IMHO... MJR (REMOVE "NoSPAM." from REPLY address to reply) (This email scanned by Norton Anti-Virus and Certified VIRUS FREE!) Michael J. Reeves, AA, ASc E-Mail: [email]michaeljreeves (AT) comcast (DOT) net[/email] --------------------------------------------------------- I have no SPAM. I don't give a SPAM. I take no SPAM from anyone. I am NOT in the SPAM business!!! [ See http://www.gotw.ca/resources/clcm.htm for info about ] [ comp.lang.c++.moderated. First time posters: Do this! ] Back to top Ben Hutchings Guest Posted: Fri Oct 31, 2003 2:46 am    Post subject: Re: How can I write C++ code for Windows/Linux Michael J. Reeves, AA, ASc wrote: Quote: On 29 Oct 2003 11:41:00 -0500, [email]thelinuxguy1997 (AT) yahoo (DOT) com[/email] (silviu) wrote: Hi All, I have to write C++ code that can be compiled (and run) on both Windows and Linux/Unix OS's. Could someone give me hints, links, info on this matter? Thanks in advance for any help. A key issue is PORTABILITY. To ensure portability, you must use a library that is common to ALL ISO/ANSI compilers. Typically, this is the Standard Template Library (STL ). The STL is not the same thing as the standard C++ library, though they overlap. Quote: Check out the references and links at: http://www.cs.rpi.edu/projects/STL/htdocs/stl.html No, that predates the changes that were made to the STL in the course of standardisation. Dinkumware's C++ library reference <http://www.dinkumware.com/refxcpp.html> is a much better reference and covers the whole standard library. [ See http://www.gotw.ca/resources/clcm.htm for info about ] [ comp.lang.c++.moderated. First time posters: Do this! ] Back to top kalev- Guest Posted: Fri Oct 31, 2003 2:51 am    Post subject: Re: How can I write C++ code for Windows/Linux Thomas Mooney wrote: Quote: silviu <thelinuxguy1997 (AT) yahoo (DOT) com> wrote in message news:f53c2ba1.0310281425.755cc01 (AT) posting (DOT) google.com... Hi All, I have to write C++ code that can be compiled (and run) on both Windows and Linux/Unix OS's. Could someone give me hints, links, info on this matter? Thanks in advance for any help. Silviu Perhaps this would be helpful: www.wxwindows.org I think "Qt" ()is worthwhile to meantion as a GUI-toolkit as well.. http://www.trolltech.no jk -- Every day above ground is a good day [ See http://www.gotw.ca/resources/clcm.htm for info about ] [ comp.lang.c++.moderated. First time posters: Do this! ] Back to top R.F. Pels Guest Posted: Sun Nov 02, 2003 12:05 pm    Post subject: Re: How can I write C++ code for Windows/Linux silviu wrote: Quote: I have to write C++ code that can be compiled (and run) on both Windows and Linux/Unix OS's. Just some thoughts: #1: Rigorously factor out platform specific stuff from your program, most notable, GUI and IO stuff. #2: Proper design is important here. #3: Try to find two compiler versions that are roughly comparable in terms of standards compliance and/or bugs. #4: If you're using STL, find an STL implementation that behaves similar for both platforms. On a more general note that advice goes for any thirdparty product used in the application #5: Start with the platform that has the least features, i.e., start on the UNIX side and then move to the Windows side. -- Ruurd [ See http://www.gotw.ca/resources/clcm.htm for info about ] [ comp.lang.c++.moderated. First time posters: Do this! ] Back to top Ed Avis Guest Posted: Sun Nov 02, 2003 5:15 pm    Post subject: Re: How can I write C++ code for Windows/Linux "R.F. Pels" <spamtrap (AT) tiscali (DOT) nl> writes: Quote: #3: Try to find two compiler versions that are roughly comparable in terms of standards compliance and/or bugs. #4: If you're using STL, find an STL implementation that behaves similar for both platforms. You can use gcc and its bundled STL implementation on both platforms. -- Ed Avis <ed (AT) membled (DOT) com> [ See http://www.gotw.ca/resources/clcm.htm for info about ] [ comp.lang.c++.moderated. First time posters: Do this! ] Back to top kanze@gabi-soft.fr Guest Posted: Tue Nov 04, 2003 7:30 pm    Post subject: Re: How can I write C++ code for Windows/Linux "Michael J. Reeves, AA, ASc" <michaeljreeves (AT) comcast (DOT) net> wrote in message news:<t9b0qvgotdfmban9cvubertrhu3nak7t19 (AT) 4ax (DOT) com>... Quote: On 29 Oct 2003 11:41:00 -0500, [email]thelinuxguy1997 (AT) yahoo (DOT) com[/email] (silviu) wrote: I have to write C++ code that can be compiled (and run) on both Windows and Linux/Unix OS's. Could someone give me hints, links, info on this matter? Thanks in advance for any help. A key issue is PORTABILITY. To ensure portability, you must use a library that is common to ALL ISO/ANSI compilers. That is only a valid option if you actually have ISO conformant compilers on all platforms. The simplest solution, of course, IS to use the same compiler (and library) on all platforms. Comeau/Dimkumware is doubtlessly the most compliant, and is available on a very wide range of platforms. G++ 2.95.[23] is also very robust, albeit fairly old, and available on just about anything. Regretfully, you don't always have this luxury. There may be technical reasons (you must link with third party libraries which are only available for VC++ under Windows, etc.), or there may be political ones. Finally, none of this addresses anything you might want to do that isn't covered by the standard, such as threading (forget g++), GUI (third partly libraries may impose a specific compiler), communications, etc. -- James Kanze GABI Software mailto:kanze (AT) gabi-soft (DOT) fr Conseils en informatique orientée objet/ http://www.gabi-soft.fr Beratung in objektorientierter Datenverarbeitung 11 rue de Rambouillet, 78460 Chevreuse, France, +33 (0)1 30 23 45 16 [ See http://www.gotw.ca/resources/clcm.htm for info about ] [ comp.lang.c++.moderated. 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