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• Visual Studio CLR project

  - by Vit

  Hi, so I wanted to try my first CLR project in Visual C++. So I created console project, but since every tutorial I found about CLR programming was using C#, or windows forms, I just tried writing standart c++ Hello Word app using iostream (I think code isnt needed in this case) but I though it will give me some compile error, since iostream uses precompiled functions, and CLR app compiles into MSIL. I assumed that CLR programming using C++ means just using C++ syntax, but different functions for I/O and so. So, basicly, what I want to ask is, can any native console C++ app be compiled into MSIL and run by .NET framework?

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• What is the compatibility on .NET 4.0?

  - by Juan Manuel Formoso

  We have several .NET applications developed in .NET 3.5 (Windows services, web applications, and WCF services) in different servers. I'd like to migrate to .NET 4.0 and use VS.NET 2010. Does VS.NET 2010 compiles to .NET 3.5 to avoid full simultaneous migration, being able to stop using VS.NET 2008 but maintaining some applications in the previous version? Can I uninstall the .NET < 4.0 runtime and have only .NET 4.0 in my servers? Does it run applications compiled to previous framework versions?

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• #define vs enum in an embedded environment (How do they compile?)

  - by Alexander Kondratskiy

  This question has been done to death, and I would agree that enums are the way to go. However, I am curious as to how enums compile in the final code- #defines are just string replacements, but do enums add anything to the compiled binary? Or are they both equivalent at that stage. When writing firmware and memory is very limited, is there any advantage, no matter how small, to using #defines? Thanks! EDIT: As requested by the comment below, by embedded, I mean a digital camera. Thanks for the answers! I am all for enums!

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• Getting latest Subsonic builds

  - by Alex Yakunin

  I need the latest Subsonic build or build it by my own. Subsonic project web site shows the latest available version is Subsonic v3.0.0.3 released at July 15, 2009. Questions: Are there any later builds - e.g. maintained by community members? If so, how can I get the latest one? In worst case I'm ready to get the latest source code and try to build it by my own. Are there any instructions for this? Please note, that I'm not interested in almost 1 year old builds - I need a build based on the latest code for tests (LINQ, performance), ideally - compiled for .NET 4.0.

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• java.lang.UnsatisfiedLinkError, mach-o but wrong architecture on Mac10.6.2

  - by Yinan

  I was trying to run a project in my local machine. I tried to load this jnilib file which I got from a running instance of this project on my Mac 10.6.2, System.load(lib.getAbsolutePath()); then I got this exception thrown: java.lang.UnsatisfiedLinkError, mach-o but wrong architecture I have check the jnilib with file command: libScreenMatchProxy.jnilib: Mach-O dynamically linked shared library i386 I guess this is because the jnilib file is compiled in 32bit but the Java comes with Mac10.6 is 64bit. So I go to Java Preference and set Java to use 32bit first. But it didn't work. As mentioned above, this jnilib file is copied from a running instance of the project on my Mac, so it should work. I don't understand why it working in the installed application but not in my Eclipse.

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• PL/SQL Package invalidated

  - by FrustratedWithFormsDesigner

  I have a script that makes use of a package (PKG_MY_PACKAGE). I will change some of the fields in a query in that package and then recompile it (I don't change or compile any other packages). I run the script and I get an error that looks like ORA-04068: existing state of packages has been discarded ORA-04061: existing state of package body "USER3.PKG_MY_PACKAGE" has been invalidated ORA-04065: not executed, altered or dropped package body "USER3.PKG_MY_PACKAGE" ORA-06508: PL/SQL: could not find program unit being called: "USER3.PKG_MY_PACKAGE" ORA-06512: at line 34 I run the script again (without changing anything else in the system) and the script executes successfully. I thought that when I compiled before I executed the script that would fix any invalid references. This is 100% reproducible, and the more I test this script the more annoying it gets. What could cause this, and what would fix it? (oracle 10g, using PL/SQL Developer 7)

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• Invoke Maven-Module build from intellij

  - by Roman

  Hi All I was wondering if someone knows a way to invoke a specific maven module build from IntelliJ that will also build ( or use already compiled classes ) from depended modules. So for instance if I would like to build the module "Model" in the picture and only it , it seems reasonable for me to click the package step on it. But what is actually does it invokes the mvn package step inside this specific module rather than "mvn -am -pl module-name" from the root module , which also builds all the dependencies. So is there something that I just don't know ?

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• About enumerations in Delphi and c++ in 64-bit environments

  - by sum1stolemyname

  I recently had to work around the different default sizes used for enumerations in Delphi and c++ since i have to use a c++ dll from a delphi application. On function call returns an array of structs (or records in delphi), the first element of which is an enum. To make this work, I use packed records (or aligned(1)-structs). However, since delphi selects the size of an enum-variable dynamically by default and uses the smallest datatype possible (it was a byte in my case), but C++ uses an int for enums, my data was not interpreted correctly. Delphi offers a compiler switch to work around this, so the declaration of the enum becomes {$Z4} TTypeofLight = ( V3d_AMBIENT, V3d_DIRECTIONAL, V3d_POSITIONAL, V3d_SPOT ); {$Z1} My Questions are: What will become of my structs when they are compiled on/for a 64-bit environment? Does the default c++ integer grow to 8 Bytes? Are there other memory alignment / data type size modifications (other than pointers)?

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• xCode 3.2.1 Alien Leak

  - by Mark

  Used code in entire project: - (void)applicationDidFinishLaunching:(UIApplication *)application { UITabBarController *tb = [[UITabBarController alloc] initWithNibName:nil bundle:nil]; [window addSubview:tb.view]; [tb release]; [window setBackgroundColor:[UIColor blackColor]]; [window makeKeyAndVisible]; } When the UITabBarController is added to the window view the following leak is detected bij Instruments: Leaked Object: Malloc 128 Bytes Address : 0x391ee70 Size : 128 Bytes Responsible Library : CoreGraphics Responsible Frame : open_handle_to_dylib_path This same issue occurs with UINavigationController, but does not appear with UIViewController. Specs: Mac OS X 10.6.2 xCode 3.2.1 Instruments 2.0.1 Compiled for iPhone Simulator 3.1.3 | Debug

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• Configuring a library to be included with C++ test

  - by vrish88

  Hello, I would like to utilize the UnitTest++ library in a testing file. However, I am having some difficulty getting the library to be included at compile time. So here is my current directory structure: tests/ UnitTests++/ libUnitTest++.a src/ UnitTests++.h unit/ test.cpp I have just used the UnitTest++ getting started guide to just get the library setup. Here is test.cpp: // test.cpp #include <UnitTest++.h> TEST(FailSpectacularly) { CHECK(false); } int main() { return UnitTest::RunAllTests(); } And I am currently trying to compile with: gcc -lUnitTest++ -L../UnitTest++/ -I../UnitTest++/src/ test.cpp I am currently getting a bunch output with ld: symbol(s) not found at the end. So how would I be able to get the UnitTest++ library properly included when this program is compiled? I am on a Mac and I'd also like for there to be an easy way for people on a Linux machine to run these same tests. Whew, I hope this provides enough information, if not please let me know.

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• Why does it NOT give a segmentation violation?

  - by user198729

  The code below is said to give a segmentation violation: #include <stdio.h> #include <string.h> void function(char *str) { char buffer[16]; strcpy(buffer,str); } int main() { char large_string[256]; int i; for( i = 0; i < 255; i++) large_string[i] = 'A'; function(large_string); return 1; } It's compiled and run like this: gcc -Wall -Wextra hw.cpp && a.exe But there is nothing output. NOTE The above code indeed overwrites the ret address and so on if you really understand what's going underneath.

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• Stack trace with incorrect line number

  - by adrianbanks

  Why would a stack trace show "line 0", but only for one frame in the stack trace? eg. ... at System.Data.SqlClient.SqlCommand.ExecuteDbDataReader(CommandBehavior behavior) at System.Data.Common.DbCommand.System.Data.IDbCommand.ExecuteReader() at My.LibraryA.Some.Method():line 16 at My.LibraryB.Some.OtherMethod():line 0 at My.LibraryB.Some.Method():line 22 at My.LibraryA.Some.Method():line 10 Background: I have an application that is failing with an exception, and is logging a stack trace to its log file. When the applciation was built, all assemblies were compiled with full debug info (Project Properties - Build - Advanced - Debug Info - Full), and so PDB files were generated. To help me diagnose where the error is coming from, I dropped the PDB files into the application's bin directory, and reproduced the exception. All line numbers for each stack frame look correct, with the exception of one which displays "line 0" as its source.

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• IronPython For Unit Testing over C#

  - by Krish

  We know that Python provides a lot of productivity over any compiled languages. We have programming in C# & need to write the unit test cases in C# itself. If we see the amount of code we write for unit test is approximately ten times more than the original code. Is it ideal choice to write unit test cases in IronPython instead of C#? Any body has done like that? I wrote few test cases, they seems to be good. But hairy pointy managers won't accept.

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• CGI, python, and setgid

  - by user331398

  I'm running a compiled python cgi script (using cxfreeze) in Apache. The script, among other things, calls os.setuid(some_uid) os.setgid(some_gid) Obviously some_uid/gid are legal and I set the sticky bit for both user and group, and verified it is indeed set. However on every call i get an error os.setgid(int(self.gid)) OSError: [Errno 1] Operation not permitted As you may notice, setuid() is successful, setgid is not. Which is very weird, at least for me, though I admit I have little experience with permissions in Linux. Any thoughts/ideas are welcome. I'm using apache 2.2.15, python 2.6.5, RHEL 5.4 (kernel 2.6.18) Thank you

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• gdb stack strangeness

  - by aaa

  Hi I get this weird backtrace (sometimes): (gdb) bt #0 0x00002b36465a5d4c in AY16_Loop_M16 () from /opt/intel/mkl/10.0.3.020/lib/em64t/libmkl_mc.so #1 0x00000000000021da in ?? () #2 0x00000000000021da in ?? () #3 0xbf3e9dec2f04aeff in ?? () #4 0xbf480541bd29306a in ?? () #5 0xbf3e6017955273e8 in ?? () #6 0xbf442b937c2c1f37 in ?? () #7 0x3f5580165832d744 in ?? () ... Any ideas why i cant see the symbols? Compiled with debugging syms of course. The same session gives symbols at other points.

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• java.lang.UnsupportedClassVersionError in eclipse

  - by Derek

  Hi all, I am not a Java programmer really, so I am posting this question. The exception is being thrown java.lang.UnsupportedClassVersionError in my main class in an eclipse project. If I comment out the imports that this class has, it compiles and runs fine. If I put the imports back in, it does not work. Does this mean that the libraries I am importing were compiled with a newer or older version of java than I have? when i do java -version on the system i get 1.5_07 I could've sworn this was actually working last week, but maybe some setting in eclipse got tweaked? Is the Java Build Path in eclipse what I need to look for to check the JRE and compiler versions?

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• call multiple c++ functions in python using threads

  - by wiso

  Suppose I have a C(++) function taking an integer, and it is bound to (C)python with python api, so I can call it from python: import c_module c_module.f(10) now, I want to parallelize it. The problem is: how does the GIL work in this case? Suppose I have a queue of numbers to be processed, and some workers (threading.Thread) working in parallel, each of them calling c_module.f(number) where number is taken from a queue. The difference with the usual case, when GIL lock the interpreter, is that now you don't need the interpreter to evaluate c_module.f because it is compiled. So the question is: in this case the processing is really parallel?

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• include figure files in latex

  - by Tim

  Hi, I am trying to include jpeg files in latex \includegraphics[width=57.6mm, height=43.2mm]{../../results2/html/zerooneloss_stumps.jpg} With specified the width and height and compiled with pdflatex, however, it produces the error: ! LaTeX Error: Cannot determine size of graphic in ../../results2/html/zerooneloss_stumps.jpg (no BoundingBox). The true size of the image is 576x432 in pixels. Have I specified the size correctly in the latex file? Anyway to use the default setting without need to specify the width and height? If I don't specify the them in the latex file, \includegraphics[]{../../results2/html/zerooneloss_stumps.jpg} I still get the same no BoundingBox error. Thanks and regards!

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• Java: How do you access a sub-object of an object with no "getXXX" method to that sub-object

  - by Daxon

  I'll explain with pictures from Eclipse Debugger I have an Class called "FieldContext", (I can't edit it, it's compiled in the Java OVal API) Within "FieldContext" on the eclipse variable tab are "CompileTimeType" and "field" Q1 Is there a legend for the icons in the variables tab? like what the red box with the "F" means + yellow diamond boxes? Now I want to access the fields inside the "field" object (RedBox) .. preferably "name" But the "FieldContext" does not have a "getField()" method, yet it has a "getCompileTimeType()" method. Q2 So is there anyway to get that field object being a "SerializableField" Class from the "FieldContext"? If eclipse debugger can see/get/edit them then I hope I can do the same in Java.

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• .Net OutOfMemory on Server but not Desktop

  - by Jörg Battermann

  Is it possible that the .Net framework behaves differently when it comes to garbage collection / memory limitations on server environments? I am running explicitly x86 compiled apps on a 64bit server machine with 32gbs of physical ram and I am running out of memory (SystemOutOfMemoryException) even though nothing but that particular app is running and the server/all other apps utilize 520mb total.. but I cannot reproduce that behaviour on my own (client win7) machine. Now I know that the app -is- memory intensive, but why is it causing problems on the server and not on the client?

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• How to invoke an Objective-C Block via the LLVM C++ API?

  - by smokris

  Say, for example, I have an Objective-C compiled Module that contains something like the following: typedef bool (^BoolBlock)(void); BoolBlock returnABlock(void) { return Block_copy(^bool(void){ printf("Block executing.\n"); return YES; }); } ...then, using the LLVM C++ API, I load that Module and create a CallInst to call the returnABlock() function: Function *returnABlockFunction = returnABlockModule->getFunction(std::string("returnABlock")); CallInst *returnABlockCall = CallInst::Create(returnABlockFunction, "returnABlockCall", entryBlock); How can I then invoke the Block returned via the returnABlockCall object?

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• Using install_name_tool what's going wrong?

  - by 0x80

  I'm trying to change the install path of a dylib after it has been build. I use "otool -L" to check what the current path is. And then I do: $ install_name_tool -change /my/current/path/libmine.dylib /my/new/path/libmine.dylib libmine.dylib I don't get an error, but nothing changes. If I check the path again the old one is still there. Also the new path is a lot shorter then the old one, so no problem there, and I think the lib is even compiled with extra flag for more filepath space. Any ideas?

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• Test for external undefined references in Linux

  - by Charles

  Is there a built in linux utility that I can use to test a newly compiled shared library for external undefined references? Gcc seems to be intelligent enough to check for undefined symbols in my own binary, but if the symbol is a reference to another library gcc does not check at link time. Instead I only get the message when I try to link to my new library from another program. It seems a little silly to get undefined reference messages in a library when I am compiling a different project so I want to know if I can do a check on all references internal and external when I build the library not when I link to it. Example error: make -C UnitTests debug make[1]: Entering directory `~/projects/Foo/UnitTests` g++ [ tons of objects ] -L../libbar/bin -lbar -o UnitTests libbar.so: undefined reference to `DoSomethingFromAnotherLibrary` collect2: ld returned 1 exit status make[1]: *** [~/projects/Foo/UnitTests] Error 1

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• What the performance of Festival TTS vs FreeTTS on windows platforms?

  - by Steel Plume

  9 hours ago I had the wonderful idea to build up from scratch Festival TTS on Windows. In the meanwhile, and in less than 30 minutes, I build up the same source code on Linux, but only because tons of development tools were already installed :D Also this morning I downloaded FreeTTS. I started a simple testing project in less of 10 minutes, thanks to the Java power :D. Unfortunately FreeTTS does not provide immediate support for international mbrola languages, so this morning I thinked "it needs too much work"... Backing to Festival TTS on Windows, after many obstacles, and tons of wrong downloads, CYGWIN before, then "make" and other exotic C++ tools "forgotten" in the installation of CYGWIN, then Visual Studio 2008, then Windows Platform SDK 2008, but it lacks of System.h, so just now I am downloading Windows Server Platform SDK 2003, etc... So now, as I am yet here without having compiled a single line of damned C-- code, my question is: at least Festival TTS is a good choice on Windows for Java development?

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• How to deal with constructor argument names?

  - by Bane

  Say I have a class that has some properties, like x, y, width and height. In its constructor, I couldn't do this: class A { public: A(int, int, int, int); int x; int y; int width; int height; }; //Wrong and makes little sense name-wise: A::A(int x, int y, int width, int height) { x = x; y = y; width = width; height = height; } First of all, this doesn't really make sense. Second, x, y, width and height become some weird values (-1405737648) when compiled using g++. It does work, however, if I append "a" to the argument names. What is the optimal way of solving these naming conflicts?

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