C++Talk.NET C++ language newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Error when compiling with Cygwin Goto page 1, 2  Next          C++Talk.NET Forum Index -> C++ language (comp.lang.c++) View previous topic :: View next topic   Author Message TuPLaD Guest Posted: Wed Aug 25, 2004 12:13 pm    Post subject: Error when compiling with Cygwin Hello, I just made a little C++ console application: #include "iostream" using namespace std; int main () { cout << "Hello Mars !"; return 0; } But when i tryed to compile it with Cygwin. gcc main.cpp -o main.exe It gave me the following error: http://users.pandora.be/rz6hkk/cygwin.png I heard there is some new *modern* c++ language ?! Back to top Rolf Magnus Guest Posted: Wed Aug 25, 2004 12:48 pm    Post subject: Re: Error when compiling with Cygwin TuPLaD wrote: Quote: Hello, I just made a little C++ console application: #include "iostream" using namespace std; int main () { cout << "Hello Mars !"; return 0; } But when i tryed to compile it with Cygwin. gcc main.cpp -o main.exe If you want to compile and link C++ code, use g++, not gcc. Since you seem to be using windows, the name might be different (AFAIK, Windows doesn't support '+' as part of file names). Quote: It gave me the following error: http://users.pandora.be/rz6hkk/cygwin.png You made a screenshot of your compiler output!? Why not just paste it into the message? Quote: I heard there is some new *modern* c++ language ?! The last C++ standard version is from 2003, but except for a few minor corrections, it's the same as C++98. Back to top Sharad Kala Guest Posted: Wed Aug 25, 2004 1:21 pm    Post subject: Re: Error when compiling with Cygwin "Rolf Magnus" <ramagnus (AT) t-online (DOT) de> wrote Quote: TuPLaD wrote: If you want to compile and link C++ code, use g++, not gcc. Since you seem to be using windows, the name might be different (AFAIK, Windows doesn't support '+' as part of file names). The name is g++ on Windows too. -Sharad Back to top Howard Guest Posted: Wed Aug 25, 2004 5:32 pm    Post subject: Re: Error when compiling with Cygwin "TuPLaD" <spawnxx (AT) pandora (DOT) be> wrote Quote: Hello, I just made a little C++ console application: #include "iostream" using namespace std; int main () { cout << "Hello Mars !"; return 0; } But when i tryed to compile it with Cygwin. gcc main.cpp -o main.exe It gave me the following error: http://users.pandora.be/rz6hkk/cygwin.png No way am I clicking on a link like that...who knows what kind of virus I might download! If you've got a compiler error, either copy&paste it here, or at least tell us what it says. Quote: I heard there is some new *modern* c++ language ?! As opposed to what, the "ancient" C++ language? And what would it have to do with the problem? Surely no change has been made to C++ that would cause such simple code to fail when it used to work. (By the way, the usual method of including standard headers is to enclose the name in <> brackets, not "" quotes. I believe that using the brackets causes the compiler to search for those headers differently than when using quotes. No idea if that's your problem, though, because I don't know what error message you're getting.) -Howard Back to top Will Twentyman Guest Posted: Wed Aug 25, 2004 7:26 pm    Post subject: Re: Error when compiling with Cygwin TuPLaD wrote: Quote: Hello, I just made a little C++ console application: #include "iostream" This line should be: #include <iostream> Quote: using namespace std; int main () { cout << "Hello Mars !"; return 0; } But when i tryed to compile it with Cygwin. gcc main.cpp -o main.exe It gave me the following error: http://users.pandora.be/rz6hkk/cygwin.png I heard there is some new *modern* c++ language ?! -- Will Twentyman email: wtwentyman at copper dot net Back to top Rich Grise Guest Posted: Wed Aug 25, 2004 7:30 pm    Post subject: Re: Error when compiling with Cygwin Rolf Magnus wrote: Quote: TuPLaD wrote: Hello, I just made a little C++ console application: #include "iostream" using namespace std; int main () { cout << "Hello Mars !"; return 0; } But when i tryed to compile it with Cygwin. gcc main.cpp -o main.exe If you want to compile and link C++ code, use g++, not gcc. Since you seem to be using windows, the name might be different (AFAIK, Windows doesn't support '+' as part of file names). It gave me the following error: http://users.pandora.be/rz6hkk/cygwin.png You made a screenshot of your compiler output!? Why not just paste it into the message? I heard there is some new *modern* c++ language ?! The last C++ standard version is from 2003, but except for a few minor corrections, it's the same as C++98. He can hit alt-prtsc, but he doesn't know how to copy/paste from a command prompt applet. I wonder if 2> works in cmd? Cheers! Rich Back to top Andre Heinen Guest Posted: Thu Aug 26, 2004 8:24 am    Post subject: Re: Error when compiling with Cygwin On 25 Aug 2004 05:13:38 -0700, [email]spawnxx (AT) pandora (DOT) be[/email] (TuPLaD) wrote: Quote: #include "iostream" I was about to post to tell the OP to use #include <iostream> instead of #include "iostream", but after I saw that neither Rolf nor Sharad reacted, I hesitated. I tried it, and indeed my compiler didn't complain. Yet I was under the impression that standard headers should be included with square brackets. Stroustrup 9.2.1 says that for standard headers square brackets should be used rather than quotes, but I couldn't figure out if it is mandatory or just some guideline. If I remember correctly, #include "somefile.h" means: 1) first search for somefile.h in the current directory, and if that fails 2) search the system directories. This would explain why my compiler accepted it. However, #include <iostream> does not mean that there must be a file called iostream: the name may be different, or there may be no file at all, depending on the compiler. Hence I believe that #include "iostream" may work on one compiler, but is not portable, and should be avoided. Did I miss something? -- Andre Heinen My address is "a dot heinen at europeanlink dot com" Back to top jive Guest Posted: Thu Aug 26, 2004 8:27 am    Post subject: Re: Error when compiling with Cygwin "Rich Grise" <null (AT) example (DOT) net> wrote Quote: The last C++ standard version is from 2003, but except for a few minor corrections, it's the same as C++98. AFAIK there is only a draft, as the standardisation process is still incomplete and new revision of the C++ standard is supposedly due this fall. - jive Back to top Rolf Magnus Guest Posted: Thu Aug 26, 2004 9:06 am    Post subject: Re: Error when compiling with Cygwin jive wrote: Quote: "Rich Grise" <null (AT) example (DOT) net> wrote in message news:ON5Xc.384$yP4.275 (AT) trnddc08 (DOT) .. The last C++ standard version is from 2003, but except for a few minor corrections, it's the same as C++98. AFAIK there is only a draft, as the standardisation process is still incomplete and new revision of the C++ standard is supposedly due this fall. See: http://www.iso.org/iso/en/CatalogueDetailPage.CatalogueDetail?CSNUMBER=38110 Back to top TuPLaD Guest Posted: Thu Aug 26, 2004 2:04 pm    Post subject: Re: Error when compiling with Cygwin First of all -> I didnt knew how to copy paste from Cygwin's window so i made a screenshot 2) THERE DOESNT EXIST ANY ANY ANY ANY image virusses that can work from a site, you will have to download & start it(yes it can go to cache :]). So its not a virus. Third -> I just compiled it in Linux, and it worked well I started it, it gave me the text & stuff :] Thx for your help all ! Back to top Will Twentyman Guest Posted: Thu Aug 26, 2004 2:25 pm    Post subject: Re: Error when compiling with Cygwin Andre Heinen wrote: Quote: On 25 Aug 2004 05:13:38 -0700, [email]spawnxx (AT) pandora (DOT) be[/email] (TuPLaD) wrote: #include "iostream" I was about to post to tell the OP to use #include <iostream instead of #include "iostream", but after I saw that neither Rolf nor Sharad reacted, I hesitated. I tried it, and indeed my compiler didn't complain. Yet I was under the impression that standard headers should be included with square brackets. Stroustrup 9.2.1 says that for standard headers square brackets should be used rather than quotes, but I couldn't figure out if it is mandatory or just some guideline. If I remember correctly, #include "somefile.h" means: 1) first search for somefile.h in the current directory, and if that fails 2) search the system directories. This would explain why my compiler accepted it. However, #include file called iostream: the name may be different, or there may be no file at all, depending on the compiler. Hence I believe that #include "iostream" may work on one compiler, but is not portable, and should be avoided. Did I miss something? I think that if he used #include "iostream.h" it would work. Based on the error messages, it looks like iostream didn't get loaded, but the complaint from the compiler comes when he tries to use something from iostream that hasn't loaded, specifically std::cout. I've gotten similar types of errors in the past from this type of mistake, especially when I mis-spell a filename. -- Will Twentyman email: wtwentyman at copper dot net Back to top Pete Chapman Guest Posted: Thu Aug 26, 2004 2:31 pm    Post subject: OT: Re: Error when compiling with Cygwin TuPLaD wrote: Quote: 2) THERE DOESNT EXIST ANY ANY ANY ANY image virusses that can work from a site, you will have to download & start it(yes it can go to cache :]). So its not a virus. Just FYI, it's quite possible have arbitrary code executed just by loading an image. Take a look at: http://www.securitytracker.com/alerts/2004/Feb/1009067.html That's just one (out-of-date) example. Granted, it's an exploit not a virus. But there's no reason that you couldn't put a virus inside a BMP. Back to top Howard Guest Posted: Thu Aug 26, 2004 2:41 pm    Post subject: Re: Error when compiling with Cygwin "TuPLaD" <spawnxx (AT) pandora (DOT) be> wrote Quote: First of all - I didnt knew how to copy paste from Cygwin's window so i made a screenshot 2) THERE DOESNT EXIST ANY ANY ANY ANY image virusses that can work from a site, you will have to download & start it(yes it can go to cache :]). So its not a virus. You obviously don't live in the MS Windows world! Windows has been well-known for allowing viruses in simply by clicking on a link. And the link shown in the text doesn't always match the actual underlying link (because HTML can hide it easily), so just because you have a .png extension (whatever that is), doesn't mean it's not something that can execute when I link to it. Check any of the dozen or more security notices about Windows in the past year. I got a virus on my PC just a month or two ago, simply by linking to a web site that had been compromised, and that was a site I normally trust and have linked to many times! Basically, my philosophy (like many Windows users') is to not click on links unless I know what I'm linking to. Quote: Third -> I just compiled it in Linux, and it worked well I started it, it gave me the text & stuff :] Thx for your help all ! (BTW, was it the include statement that was the problem?) Back to top Rolf Magnus Guest Posted: Thu Aug 26, 2004 4:24 pm    Post subject: Re: Error when compiling with Cygwin TuPLaD wrote: Quote: First of all - I didnt knew how to copy paste from Cygwin's window so i made a screenshot Fair enough, though unusual :-) Quote: 2) THERE DOESNT EXIST ANY ANY ANY ANY image virusses that can work from a site, you will have to download & start it(yes it can go to cache :]). So its not a virus. The fact that its name ends in .png alone doesn't mean it's just an image. That depends on the mimetype that the http server sends. It could easily be a html page with javascript and activex and (insert web buzzword here). Quote: Third -> I just compiled it in Linux, and it worked well But surely not with the command line you wrote in your original message. If you use gcc for it, the C++ standard library will not be linked in, which should result (and does here on my linux box) in similar messages to those from your screenshot. Try (as I already wrote) g++ instead of gcc. Do you get the same errors when using g++ under Cygwin? Back to top jive Guest Posted: Thu Aug 26, 2004 5:42 pm    Post subject: Re: Error when compiling with Cygwin Quote: "Rolf Magnus" <ramagnus (AT) t-online (DOT) de> wrote $1 (AT) news (DOT) t-online.com... jive wrote: The last C++ standard version is from 2003, but except for a few minor corrections, it's the same as C++98. AFAIK there is only a draft, as the standardisation process is still incomplete and new revision of the C++ standard is supposedly due this fall. See: http://www.iso.org/iso/en/CatalogueDetailPage.CatalogueDetail? CSNUMBER=38110 Strange.. I found no mention about this on http://www.open-std.org/jtc1/sc22/wg21/ and this http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2004/n1638.pdf outdates the one available on the ISO site. Could someone comment on that? - jive --- [ comp.std.c++ is moderated. To submit articles, try just posting with ] [ your news-reader. 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