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• How to improve Visual C++ compilation times?

  - by dtrosset

  I am compiling 2 C++ projects in a buildbot, on each commit. Both are around 1000 files, one is 100 kloc, the other 170 kloc. Compilation times are very different from gcc (4.4) to Visual C++ (2008). Visual C++ compilations for one project take in the 20 minutes. They cannot take advantage of the multiple cores because a project depend on the other. In the end, a full compilation of both projects in Debug and Release, in 32 and 64 bits takes more than 2 1/2 hours. gcc compilations for one project take in the 4 minutes. It can be parallelized on the 4 cores and takes around 1 min 10 secs. All 8 builds for 4 versions (Debug/Release, 32/64 bits) of the 2 projects are compiled in less than 10 minutes. What is happening with Visual C++ compilation times? They are basically 5 times slower. What is the average time that can be expected to compile a C++ kloc? Mine are 7 s/kloc with vc++ and 1.4 s/kloc with gcc. Can anything be done to speed-up compilation times on Visual C++?

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• warning C4996: 'getch': The POSIX name for this item is deprecated

  - by Maziah Mohd Zaki

  1c:\users\user\documents\visual studio 2008\projects\bengkel\bengkel\login.cpp(196) : warning C4996: 'getch': The POSIX name for this item is deprecated. Instead, use the ISO C++ conformant name: _getch. See online help for details. 1 c:\program files\microsoft visual studio 9.0\vc\include\conio.h(145) : see declaration of 'getch' 1c:\users\user\documents\visual studio 2008\projects\bengkel\bengkel\login.cpp(199) : warning C4996: 'getch': The POSIX name for this item is deprecated. Instead, use the ISO C++ conformant name: _getch. See online help for details. 1 c:\program files\microsoft visual studio 9.0\vc\include\conio.h(145) : see declaration of 'getch' 1c:\users\user\documents\visual studio 2008\projects\bengkel\bengkel\login.cpp(203) : warning C4065: switch statement contains 'default' but no 'case' labels 1c:\users\user\documents\visual studio 2008\projects\bengkel\bengkel\login.cpp(225) : warning C4996: 'strcpy': This function or variable may be unsafe. Consider using strcpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details. 1 c:\program files\microsoft visual studio 9.0\vc\include\string.h(74) : see declaration of 'strcpy'

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• 'strcpy' error and warning

  - by Leejo

  I'm getting a 'strcpy' error and warning for the following lines: _tcscpy(strCommandLine,_T("MyProgram.exe /param1")); _tcscpy(strApplicationName,_T("MyProgram.exe")); Not sure why I'm getting a 'strcpy' error or warning since I'm not using 'strcpy'. The only lines related to this is: LPCTSTR strApplicationName; LPTSTR strCommandLine; _tcscpy(strCommandLine,_T("MyProgram.exe /param1")); //warning is on this line _tcscpy(strApplicationName,_T("MyProgram.exe")); //error is on this line The output is: 1c:\documents and settings\X.X\my documents\sandbox\sample.cpp(52) : warning C4996: 'strcpy': This function or variable may be unsafe. Consider using strcpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details. 1 c:\program files\microsoft visual studio 8\vc\include\string.h(74) : see declaration of 'strcpy' 1c:\documents and settings\X.X\my documents\sandbox\sample.cpp(53) : error C2664: 'strcpy' : cannot convert parameter 1 from 'LPCTSTR' to 'char *' 1 Conversion loses qualifiers Any ideas on what this could means? These are my headers: iostream windows.h stdio.h tchar.h winnt.h

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• C function const multidimensional-array argument strange warning

  - by rogi

  Ehllo, I'm getting some strange warning about this code: typedef double mat4[4][4]; void mprod4(mat4 r, const mat4 a, const mat4 b) { /* yes, function is empty */ } int main() { mat4 mr, ma, mb; mprod4(mr, ma, mb); } gcc output as follows: $ gcc -o test test.c test.c: In function 'main': test.c:13: warning: passing argument 2 of 'mprod4' from incompatible pointer type test.c:4: note: expected 'const double (*)[4]' but argument is of type 'double (*)[4]' test.c:13: warning: passing argument 3 of 'mprod4' from incompatible pointer type test.c:4: note: expected 'const double ()[4]' but argument is of type 'double ()[4]' defining the function as: void mprod4(mat4 r, mat4 a, mat4 b) { } OR defining matrices at main as: mat4 mr; const mat4 ma; const mat4 mb; OR calling teh function in main as: mprod4(mr, (const double(*)[4])ma, (const double(*)[4])mb); OR even defining mat4 as: typedef double mat4[16]; make teh warning go away. Wat is happening here? Am I doing something invalid? gcc version is 4.4.3 if relevant. Thanks for your attention.

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• Persistent warning message about "initWithDelegate"!

  - by RickiG

  Hi This is not an actual Xcode error message, it is a warning that has been haunting me for a long time. I have found no way of removing it and I think I maybe have overstepped some unwritten naming convention rule. If I build a class, most often extending NSObject, whose only purpose is to do some task and report back when it has data, I often give it a convenience constructor like "initWithDelegate". The first time I did this in my current project was for a class called ISWebservice which has a protocol like this: @protocol ISWebserviceDelegate @optional - (void) serviceFailed:(NSError*) error; - (void) serviceSuccess:(NSArray*) data; @required @end Declared in my ISWebservice.h interface, right below my import statements. I have other classes that uses a convenience constructor named "initWithDelegate". E.g. "InternetConnectionLost.h", this class does not however have its methods as optional, there are no @optional @required tags in the declaration, i.e. they are all required. Now my warning pops up every time I instantiate one of these Classes with convenience constructors written later than the ISWebservice, so when utilizing the "InternetConnectionLost" class, even though the entire Class owning the "InternetConnectionLost" object has nothing to do with the "ISWebservice" Class, no imports, methods being called, no nothing, the warning goes: 'ClassOwningInternetConnectionLost' does not implement the 'ISWebserviceDelegate' protocol I does not break anything, crash at runtime or do me any harm, but it has begun to bug me as I near release. Also, because several classes use the "initWithDelegate" constructor naming, I have 18 of these warnings in my build results and I am getting uncertain if I did something wrong, being fairly new at this language. Hope someone can shed a little light on this warning, thank you:)

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• Emacs 23.2 opens a new window for each compile error/warning navigated to

  - by Grant Limberg

  I've recently upgraded from Carbon Emacs (v22.3) to vanilla Emacs 23.2 (from http://www.emacsformacosx.com). On Carbon Emacs when compiling a project, The frame is split in two with the current source file/SConscript in the top window, and the compile output in the bottom window. I'd hit C-x ` to navigate to the first warning or error in the compile output and it would replace whatever was in the top window with the source file the error or warning is in. In Emacs 23.2, however, a 3rd window is opened causing two windows open in the top half of the frame (split vertically) and the compile output in the window of the bottom half of the frame. How do I tell Emacs to not open a new window and instead open the code in the the existing non-compiler output window in the frame? A little further clarification on the behavior that I just noticed. If I hit C-x ` while the buffer containing the source file or SConscript file is active, no new window is opened. It's only if I'm manually navigating through the *compilation* buffer and hitting enter on an error or warning, or mouse clicking on a warning when a third buffer window appears.

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• Code Analysis Warning CA1004 with generic method

  - by Vaccano

  I have the following generic method: // Load an object from the disk public static T DeserializeObject<T>(String filename) where T : class { XmlSerializer xmlSerializer = new XmlSerializer(typeof(T)); try { TextReader textReader = new StreamReader(filename); var result = (T)xmlSerializer.Deserialize(textReader); textReader.Close(); return result; } catch (FileNotFoundException) { } return null; } When I compile I get the following warning: CA1004 : Microsoft.Design : Consider a design where 'MiscHelpers.DeserializeObject(string)' doesn't require explicit type parameter 'T' in any call to it. I have considered this and I don't know a way to do what it requests with out limiting the types that can be deserialized. I freely admit that I might be missing an easy way to fix this. But if I am not, then is my only recourse to suppress this warning? I have a clean project with no warnings or messages. I would like to keep it that way. I guess I am asking "why this is a warning?" At best this seems like it should be a message. And even that seems a bit much. Either it can or it can't be fixed. If it can't then you are just stuck with the warning with no recourse but suppressing it. Am I wrong?

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• When is a bool not a bool (compiler warning C4800)

  - by omatai

  Consider this being compiled in MS Visual Studio 2005 (and probably others): CPoint point1( 1, 2 ); CPoint point2( 3, 4 ); const bool point1And2Identical( point1 == point2 ); // C4800 warning const bool point1And2TheSame( ( point1 == point2 ) == TRUE ); // no warning What the...? Is the MSVC compiler brain-dead? As far as I can tell, TRUE is #defined as 1, without any type information. So by what magic is there any difference between these two lines? Surely the type of the expression inside the brackets is the same in both cases? [This part of the question now satisfactorily answered in the comments just below] Personally, I think that avoiding the warning by using the == TRUE option is ugly (though less ugly than the != 0 alternative, despite being more strictly correct), and it is better to use #pragma warning( disable:4800 ) to imply "my code is good, the compiler is an ass". Agree? Note - I have seen all manner of discussion on C4800 talking about assigning ints to bools, or casting a burger combo with large fries (hold the onions) to a bool, and wondering why there are strange results. I can't find a clear answer on what seems like a much simpler question... that might just shine line on C4800 in general.

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• Open file - Security warning

  - by joker

  Does anyone know how to disable the unknown publisher security warning when running an application in Windows Xp Home? It's pretty annoying to have to click run everytime... I have tried: Run gpedit.msc, and go to Local Computer Policy-User Configuration-Administrative Templates-Windows Components-Attachment Manager and enable "Default risk level for file attachments", and then enable "Inclusion list for low risk file types" and add to this list the file extensions that you want to open without triggering this crap. But this file 'gpedit.msc' doest not exist on my computer, i checked system32 folder also =/ maybe its for xp pro

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• X11 from ssh on Mac OSX to Linux server doesn't work --- Gtk-WARNING **: cannot open display

  - by Cal

  Hello, I installed a program wireshark on my remote linux box and I'm trying to run it with X11 from my mac computer using SSH. Here's my terminal... macosx$ echo $DISPLAY /tmp/launch-f4w6k6/:0 macosx$ ssh -X [email protected] [email protected]'s password: remoteubuntu:~# echo $DISPLAY remoteubuntu:~# wireshark (wireshark:18927): Gtk-WARNING **: cannot open display: Here's a few lines from /etc/ssh/sshd_config X11Forwarding yes X11DisplayOffset 10 PrintMotd no PrintLastLog yes TCPKeepAlive yes #UseLogin no Thanks for the help!

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• Email: X-Authentication-Warning

  - by stef

  We're sending out 1000's of mails per day from our site (mainly "click here to verify your subscription") and too many are getting flagged by spam (mainly hotmail). One of the things I noticed in the headers is X-Authentication-Warning: srv01.site.com: www-data set sender to [email protected] using -f Is this something I should be worried about, that may cause spam flags to raise? (I'm already checking various issues that have been mentioned regarding spam flagging over at stackoverflow, I know there are many factors in play)

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• Norton 360: Clear "unrepairable virus detected" warning

  - by Mark

  Norton made a misdiagnoses, as usual, when it found a "virus" on a CD. Of course, the CD is read-only so Norton couldn't destroy it, which made Norton sad. Problem is, I can't get rid of the stupid warning message. Anyone know how?

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• OS X rpc.statd warning failed to contact host

  - by Obsidian

  When I log into my mac on 10.6.3 I get the following error in my console 29/05/2010 19:11:43 prometheus rpc.statd[109] Warning Failed to contact host aphrodite.lan: RPC: Unknown host Now I know that rpc is trying to contact a non existent host but what I can't figure out is why and how to stop it. Any ideas?

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• Failed dependencies warning while installing pure-ftpd

  - by Anil

  I am trying to install pure-ftpd which is getting failed with the following warnings warning: pure-ftpd-1.0.36-1.el5.rf.i386.rpm: Header V3 DSA/SHA1 Signature, key ID 6b8d79e6: NOKEY error: Failed dependencies: libmysqlclient.so.15 is needed by pure-ftpd-1.0.36-1.el5.rf.i386 libmysqlclient.so.15(libmysqlclient_15) is needed by pure-ftpd-1.0.36-1.el5.rf.i386 libpq.so.4 is needed by pure-ftpd-1.0.36-1.el5.rf.i386 I used locate libmysqlclient libpq where i could find libmysqlclient.so.16 and libpq.so.5 installed in my server I am using CentOS 6 server.

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• iPad memory warning

  - by fer

  How much memory can an application use on the iPad? sometimes I receive a memory warning using 8mb using object allocation instruments.

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• get rid of warning when installing registry file

  - by Yaron Naveh

  I use windows vista but this question is for other windows versions as well. When I double click to install a reg file I get this warning: Adding information can unintentionally change or delete values and cause components to stop working correctly. If you do not trust the source of this information in myFile.reg, do not add it to the registry. Is there any way to get rid of it and from the approval message after?

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• User Account Control warning showed everytime I run an installed program

  - by Bronzato

  I just installed Windows 8 on my computer. Next I installed a program for prototyping (Pencil). Everytime I run this program I have the following Warning: User Account Control Do you want to allow the following program from an unknown publisher to make changes to this computer? I prefer not disable the User Account Control. Is there a way to stop User Account to warn me for this program? Thanks.

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• Excel 2007 user warning when opening xls files

  - by J Angwenyi

  I am getting the following error warning when opening an xls file generated using 'CarlosAg.ExcelXmlWriter.dll' using Excel 2007 The file you are trying to open,'', is in a different format than specified by the file extension. Verify that the file is not corrupted and is from a trusted source before opening the file. Do you want to open the file now? Any idea how to resolve?

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• Silencing GCC warnings when using an "Uncopyable" class

  - by Kazade

  I have several classes that I don't want to be copyable, some of these classes have pointer data members. To make these classes uncopyable I privately inherit the following class template: template <class T> class Uncopyable { protected: Uncopyable() {} virtual ~Uncopyable() {} private: Uncopyable(const Uncopyable &); T & operator=(const T&); }; Which I used like so: class Entity : private Uncopyable<Entity> { } This works fine, however when I compile with -Weffc++ I still get the following warning: class Entity has pointer data members but does not override Entity(const Entity&) or operator=(const Entity&) Why is it still giving me this warning?

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• Ubuntu display warning before shutdown over ssh

  - by gshankar

  Ok I admit it... I stupidly shutdown my remote server via ssh instead of restarting it like I wanted to do :( To prevent me doing a silly again, is there a way to display a warning / confirmation on a shutdown command? (like "Are you sure you want to shut down this server?" yes/no ) OR, can I not allow shutting down (but not restarting because I still might need to do that from time to time) over ssh?

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• warning BC40056: Namespace or type specified in the Imports 'MS.Internal.Xaml.Builtins' doesn't cont

  - by Heinzi

  I have a WPF VB.NET project in Visual Studio 2008. For some reason, Visual Studio thinks that it needs to add an Imports MS.Internal.Xaml.Builtins to every auto-generated XAML partial class (= the nameOfXamlFile.g.vb files), resulting in the following warning: warning BC40056: Namespace or type specified in the Imports 'MS.Internal.Xaml.Builtins' doesn't contain any public member or cannot be found. Make sure the namespace or the type is defined and contains at least one public member. Make sure the imported element name doesn't use any aliases. I can remove the Imports line, but, since this is an auto-generated file, it reappears every time that the project is rebuilt. This warning message is annoying and clutters my error list. Is ther something that can be done about it? Or is it a known bug?

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• Xcode warning: application executable contains unsupported architecture(s):arm, arm (-19031)

  - by rmvz3

  Hi all. I've been receiving this warning since I loaded my project in last Xcode 4 preview. There was no warning before that but now I can't get rid of it even in Xcode 3.2. I've been googling but nobody seems to have the same error. My project and target settings are correct (IMHO): Architectures: Standard (armv6 armv7), Base SDK: Latest iOS (currently set to iOS 4.2), Build Active Architecture Only: FALSE, Valid Architectures: armv6 armv7. I compared every project setting with other projects and and found no differences. I even have recreated the project starting from scratch and copying classes, resources and frameworks with the same result. I must say that the warning is not shown when I set Debug configuration. I hope someone can help me because I don't know what to do. Thanks in advice.

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• Why 'initWithObjectsAndKeys:' doesn't throw a casting warning? (NSDictionary)

  - by rubdottocom

  Sorry if the question isn't correct, I'm very new in Objective-C. I understand why this code throw the Warning: "warning: passing argument 1 of 'initWithObjectsAndKeys:' makes pointer from integer without" NSDictionary *dictNames = [[NSDictionary alloc] initWithObjectsAndKeys: 3, @"", 4, @"", 5, @"",nil]; Keys and Values of a NSDictionary must be NSObject and not fundamental types, like the integers 3, 4 and 5. (Correct me if necessary). But I don't understand why this warning dissapears with the only "correct typing" of the first Key. NSDictionary *dictNames = [[NSDictionary alloc] initWithObjectsAndKeys: [NSNumber numberWithInteger:3], @"", 4, @"", 5, @"",nil]; It's because NSDictionary assumes the type of the other Keys? Is correct this manner of initialization?

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• MSBuild 4 fails to build VS2008 csproj due to 1 compiler warning

  - by David White

  We have a VS2008 CS DLL project targeting .NET 3.5. It builds successfully on our CI server when using MSBuild 3.5. When CI is upgraded to use MSBuild 4.0, the same project fails to build, due to 1 warning message: c:\WINDOWS\Microsoft.NET\Framework\v3.5\Microsoft.Common.targets(1418,9): warning MSB3283: Cannot find wrapper assembly for type library "ADODB". The warning does not occur with MSBuild 3.5, and I'm surprised that it results in Build FAILED. We do not have the project set to treat warnings as errors. All our other projects build successfully with either version of MSBuild.

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• Java Generics Type Safety warning with recursive Hashmap

  - by GC

  Hi, I'm using a recursive tree of hashmaps, specifically Hashmap map where Object is a reference to another Hashmap and so on. This will be passed around a recursive algorithm: foo(String filename, Hashmap<String, Object> map) { //some stuff here for (Entry<String, Object> entry : map.entrySet()) { //type warning that must be suppressed foo(entry.getKey(), (HashMap<String, Object>)entry.getValue()); } } I know for sure Object is of type Hashmap<String, Object> but am irritated that I have to suppress the warning using @SuppressWarnings("unchecked"). I'll be satisfied with a solution that does either a assert(/*entry.getValue() is of type HashMap<String, Object>*/) or throws an exception when it isn't. I went down the Generics route for compile type safety and if I suppress the warning then it defeats the purpose. Thank you for your comments, ksb

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