C++Talk.NET C++ language newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Why is warning coming?          C++Talk.NET Forum Index -> C++ Language (Moderated) View previous topic :: View next topic   Author Message dragoncoder Guest Posted: Fri Apr 08, 2005 11:12 pm    Post subject: Why is warning coming? Hello all, I am working on Solaris 9 with gcc 3.2.3. Please consider the following code. // a3.cxx #include <iostream> using namespace std; int main() { const char str[] = "abc"; cout << str << endl; return 0; } bash-2.05$ g++ a3.cxx -ansi -Wall -pedantic /usr/local/include/c++/3.2.3/b­its/stl_threads.h: In instantiation of `__gthread_mutex_t std::_Swap_lock_struct<0>::_S_­swap_lock': /usr/local/include/c++/3.2.3/b­its/stl_threads.h:122: instantiated from here /usr/local/include/c++/3.2.3/b­its/stl_threads.h:115: warning: aggregate has a partly bracketed initializer Can someone please explain me why is the warning coming? I read the type of a string literal in C++ is const char[], if yes, I don't expect any warning. Please help. Pankaj [ See http://www.gotw.ca/resources/clcm.htm for info about ] [ comp.lang.c++.moderated. First time posters: Do this! ] Back to top Timo Geusch Guest Posted: Sat Apr 09, 2005 10:08 am    Post subject: Re: Why is warning coming? dragoncoder wrote: Quote: Hello all, I am working on Solaris 9 with gcc 3.2.3. Please consider the following code. // a3.cxx #include <iostream using namespace std; int main() { const char str[] = "abc"; cout << str << endl; return 0; } bash-2.05$ g++ a3.cxx -ansi -Wall -pedantic /usr/local/include/c++/3.2.3/b­its/stl_threads.h: In instantiation of `__gthread_mutex_t std::_Swap_lock_struct<0>::_S_­swap_lock': /usr/local/include/c++/3.2.3/b­its/stl_threads.h:122: instantiated from here /usr/local/include/c++/3.2.3/b­its/stl_threads.h:115: warning: aggregate has a partly bracketed initializer Can someone please explain me why is the warning coming? I read the type of a string literal in C++ is const char[], if yes, I don't expect any warning. From the warning you quoted it looks like it originates in one of the files that are included when you #include <iostream> and it has nothing to do with your own code. [ See http://www.gotw.ca/resources/clcm.htm for info about ] [ comp.lang.c++.moderated. First time posters: Do this! ] Back to top James Kanze Guest Posted: Sat Apr 09, 2005 10:56 pm    Post subject: Re: Why is warning coming? dragoncoder wrote: Quote: I am working on Solaris 9 with gcc 3.2.3. Please consider the following code. // a3.cxx #include <iostream using namespace std; int main() { const char str[] = "abc"; cout << str << endl; return 0; } bash-2.05$ g++ a3.cxx -ansi -Wall -pedantic /usr/local/include/c++/3.2.3/b­its/stl_threads.h: In instantiation of `__gthread_mutex_t std::_Swap_lock_struct<0>::_S_­swap_lock': /usr/local/include/c++/3.2.3/b­its/stl_threads.h:122: instantiated from here /usr/local/include/c++/3.2.3/b­its/stl_threads.h:115: warning: aggregate has a partly bracketed initializer Can someone please explain me why is the warning coming? Because the library authors of g++ don't have same opinion as to what qualifies as "acceptable quality" as the compiler authors do:-). (Seriously, I seem to recall looking at this, and it is an awkward case. There are types involved that the library writers don't know. Still, I presume that there is some way to get the compiler to shut up, locally.) Quote: I read the type of a string literal in C++ is const char[], if yes, I don't expect any warning. The filename and linenumber of the warning don't correspond to your declaration, so why do you think that the error is there? The problem is in the library. -- James Kanze mailto: [email]james.kanze (AT) free (DOT) fr[/email] Conseils en informatique orientée objet/ Beratung in objektorientierter Datenverarbeitung 9 pl. Pierre Sémard, 78210 St.-Cyr-l'École, France +33 (0)1 30 23 00 34 [ See http://www.gotw.ca/resources/clcm.htm for info about ] [ comp.lang.c++.moderated. First time posters: Do this! ] Back to top kerzum@mail.ru Guest Posted: Sun Apr 10, 2005 8:53 am    Post subject: Re: Why is warning coming? I believe this gcc-specific issue should be discussed outside of clcm, though here's the answer If you really like warnings, you got to disable most annoying one by one. This warning is up to gcc developers, It's likely you'll see it while compiling any c++ source. I recommend adding -Wno-missing-braces in order to avoid it. If you're really interested what this warning means, here's quote from GCC info pages: `-Wmissing-braces' Warn if an aggregate or union initializer is not fully bracketed. In the following example, the initializer for `a' is not fully bracketed, but that for `b' is fully bracketed. int a[2][2] = { 0, 1, 2, 3 }; int b[2][2] = { { 0, 1 }, { 2, 3 } }; [end quote] in order for compiler to silently accept constructs like vector<T> v; for(int i=0;i I'd also recommend using -Wno-sign-compare [ See http://www.gotw.ca/resources/clcm.htm for info about ] [ comp.lang.c++.moderated. First time posters: Do this! ] Back to top Seungbeom Kim Guest Posted: Tue Apr 12, 2005 6:53 am    Post subject: Re: Why is warning coming? James Kanze wrote: Quote: dragoncoder wrote: I read the type of a string literal in C++ is const char[], if yes, I don't expect any warning. The filename and linenumber of the warning don't correspond to your declaration, so why do you think that the error is there? The problem is in the library. But in most cases with template libraries where the problem is in the user code, the warnings or errors come from the library header files. If the error in the user code could be diagnosed as such without exposing all the details of the library, it would be great; but for now, it remains to be a wish. -- Seungbeom Kim [ See http://www.gotw.ca/resources/clcm.htm for info about ] [ comp.lang.c++.moderated. First time posters: Do this! ] Back to top R Samuel Klatchko Guest Posted: Sat Apr 16, 2005 12:18 am    Post subject: Re: Why is warning coming? dragoncoder wrote: Quote: #include <iostream using namespace std; int main() { const char str[] = "abc"; cout << str << endl; return 0; } bash-2.05$ g++ a3.cxx -ansi -Wall -pedantic /usr/local/include/c++/3.2.3/b­its/stl_threads.h: In instantiation of `__gthread_mutex_t std::_Swap_lock_struct<0>::_S_­swap_lock': /usr/local/include/c++/3.2.3/b­its/stl_threads.h:122: instantiated from here /usr/local/include/c++/3.2.3/b­its/stl_threads.h:115: warning: aggregate has a partly bracketed initializer It's due to a problem in the Solaris implementation of pthreads (although I thought it was fixed in Solaris 9). The pthread's static mutex initializer PTHREAD_MUTEX_INITIALIZER is not bracketed properly so the compiler kicks out a warning. You can safely ignore it. samuel [ See http://www.gotw.ca/resources/clcm.htm for info about ] [ comp.lang.c++.moderated. First time posters: Do this! ] Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         C++Talk.NET Forum Index -> C++ Language (Moderated) All times are GMT Page 1 of 1   Jump to: Select a forum C/C++----------------C LanguageC Language (Moderated)C++ Language (Moderated)C++ language (comp.lang.c++)C++ language, library and standards Non-English C/C++ Newsgroups----------------C++ (German)C++ (French)  You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum Powered by phpBB © 2001, 2006 phpBB Group SEO toolkit © 2004-2006 webmedic.