I've been trying for about 2 weeks now to get a logging library to work with. I've tried Log4cxx, Log4cpp, log4cplus and boost.log. The problem isn't that none of these work for me, it's that I can't figure out how to get them to work at all. I would really like to use log4cxx since I'm working with log4j/logback at work, but I haven't been able to get any of the libraries based on log4j to build. I've been able to build and use the boost library, but boost.log gives me all kinds of linker errors no matter what I try. If anyone could direct me to a step-by-step guide to get one of these libraries working I would greatly appreciate it. Also, I'm using eclipse as my IDE if that matters.
Did you ever get this working? Log4cxx definitely works on Win7. Maybe you could post some of your build errors. Just guessing, perhaps you didn't configure your eclipse project to link with a log4cxx static lib.
Boost.Log works for me quite well (Linux and Windows). It is not a header only library, there is a compiled part that you need to link against. See instructions here.
It also depends on other, non-header, Boost libraries:
The logging library uses several other Boost libraries that need
building too. These are Boost.Filesystem, Boost.System,
Boost.DateTime, Boost.Thread and Boost.Regex. Refer to their
documentation for detailed instructions on the building procedure.
Depending on your platform there may be pre-built versions of the Boost libraries. Otherwise building it yourself is straightforward if you follow the instructions. If you get stuck update your question with where exactly you got stuck and what you're seeing.
I'd recommend Pantheios. It takes some time to build everything when you first download - type make build test and go have lunch - and you have to select the output streams (Pantheios calls them "back ends") at link time, but for coding, it is really simple, e.g.
std::string name;
int age;
pantheios::log_DEBUG("name=", name, " age=", pantheios::integer(age));
It's designed from the ground up for speed - the age won't be converted into a string unless the "DEBUG" level is switched on - and robustness - which is why you can't pass fundamental types directly, and use "inserters" (e.g. pantheios::integer). See this recent blog post by Pantheios' author for more information.
I managed to get log4cxx to work, this was done in Visual Studios 2013 running on Windows 7 OS.
This following is what I did, step by step:
Download the log4cxx ZIP package extract its contents, http://logging.apache.org/log4cxx/download.html
Download apr and apr-util ZIP packages, http://apr.apache.org/download.cgi
Then
manually extract this zip apr-1.2.11-win32-src.zip (the
extracted folder should be named 'apr', if it is not manually rename
it)
manually extract this zip apr-util-1.2.10-win32-src.zip (the
extracted folder should be named 'apr-util', if it is not manually
rename it)
open a command prompt and run the following: cd
apache-log4cxx-0.10.0 configure (this
will execute configure.bat)
We will need to disable to use of the APR ICONV and LDAP support.
In order to do so, we will append the following files manually:
Open apr-util\include\apu.hw. Find the line starting with “#define
APU_HAVE_APR_ICONV”. Change the value to 0 and save.
Open apr-util\include\apr_ldap.hw. Find the line starting with
“#define APR_HAS_LDAP” Change the value to 0 and save.
We need to build the log4cxx.dll, to do so convert *.dsw
to *.cxproj.
Launch Visual Studio 2013 and open log4cxx.dsw.
VS will ask if you like to convert everything. Simply click Yes.
There may be some warnings in the migration report, but nothing that
should prevent the solution from opening.
> The projects xml, apr, and apr-util should build successfully.
If you try compiling the log4cxx project it will most
likely fail with hundreds of errors. This is due to a bug in VC++
which can be worked around.
Move all macros outside (above) the class they are in.
LOG4CXX_LIST_DEF macro is used to define classes. All macros reported in error C2252 will need to move out of any classes. This
may also include moving definitions which are used in the macro.
Next, change all LoggingEvent::KeySet to KeySet (this is no longer nested in a parent class)
> Following this, the log4cxx project should now compile
successfully on your machine.
Related
I try to use Xcode (v.7.3.1) for my C++ project (build system - make), but the experience is quite poor (and it was always like that since old versions like v4 when I started using it) - code completion doesn't work, color syntaxing works oddly (no coloring sometimes, or partially colored code), no "jump-to-definition" functionality, can't switch b/w header/source files with shortcuts. Basically, it's just a text editor where I have to use "Find" and Cmd+Shift+O all the time.
Is this intentional and Xcode will never get any proper support for C++ projects with external build system (make) or am I misconfiguring my project? How can I re-index files in the project? How can I make code completion work?
Thanks,
I believe there is a way to use Xcode with makefiles by adding an external build target, file->new->target->External Build System.
This is an older tutorial but the steps may be worth looking through: http://web.ist.utl.pt/jose.alberto.coelho/mac/MakefilesXcode.pdf
I've never had a problem with the syntax highlighting, but I remember the refactoring support being limited for C++ in some ways.
So, I ended up using this workaround: even though, I use external build system, I create Console Application project in Xcode and choose C++ language in settings. Then, I simply add my source files to the project (just drag folders from the Finder window) and then manually create project targets of type External Build System as I need. I don't use default target and don't use generated main.cpp file at all.
My files get indexed with no problems. I'm also able to debug code as I used to.
I still think Xcode developers should review indexing process for the projects with external build system...
Thanks for all the insights though!
I am somewhat of a beginner when it comes to open source libraries. I have tried to compile from source and use the pre-built binaries, but in both cases I get a ton of errors when I try to run the simple 'Hello World' program on the tutorial section of the wxWidgets website. After playing around for quite some time, the closest I have got to compiling is by building the libraries from source, but I still have 2 errors remaining:
"_w64 can only be specified on int, long, and pointer types" file: defs.h
"cannot open file 'wxbase31ud.lib" - LINK
It seems strange to me that the header file provided by wx would have an error such as that one, so I imagine both errors are because of something I am doing. I am hoping that someone here can do one of the following for me:
Help me solve these errors
Provide instructions for building libraries from source and subsequently linking my program to the correct directories
Some additional info: I am working on x64 Windows 7, my target will also be x64 exclusively. I do not have admin privileges, so no editing the system PATH for me.
Thanks for your help!
The simplest way to start working with the library is this:
Grab the sources.
Unpack the sources.
Open VS IDE.
Open \build\msw\wx-vc14.sln (adjust as necessary.)
Go to "Build->Batch Build...", click "Select All", "Build".
Go drink some coffee or watch TV.
After the build finishes, open wxWidgets/samples/minimal/minimal_vc9.sln.
Let MSVC convert the solution to become an appropriate format.
Build and run the sample.
If you will acquire any issue during those steps, let us know.
The library build in step 5 should build without any issues and then all you will need is to build the minimal sample.
The next step is to copy the samples\minimal folder somewhere and start writing the code. All you will need to do is to change the Include and Lib search path.
[EDIT]
If you can build the 32-bit libraries (which are default in the provided solutions) all you will need is to convert them to be 64-bit and rebuild.
There is no changes to the $PATH or any environmental variable involved. Moreover you shouldn't build anything with the admin priviledges.
Also as Thomas pointed out you library build has to match whatever sample you are trying to build.
[/EDIT]
I'm lost here and I have no clue how to proceed. This is not a question about how to make my program work, this is a question about how to stop wasting my time.
My programming environment is Visual Studio 2013 on windows, in C++.
I use 3 libraries extensively, namely: boost (using dynamic linking), OpenCV, and Qt.
During the development, I have configured VS to look at those 3 libraries by default for include and .lib. I have also added the 3 folders containing all the dlls to my PATH environment variable.
It works, but it is sometime painful, let me explain you when.
First hassle: Anytime I have a LNK error telling me I miss a function, it is usually on OpenCV since it has only one include file referencing all the functions. I have to look at OpenCV's source code to see what module this function belongs to and to know what I must link my program to.
Second Hassle: When comes the time to deploy my application, I have to ship it with all the relevant dlls. To know which one I need, I open dependency walker and try to forget nothing, I have then to test it on a different computer because 102% of the time I have missed a couple, and then I have to configure my Installer generator to include all those one by one.
Third Hassle: To ease a little bit the process of configuring a new development machine, I have recently switched to NuGet. It is great, I add boost with a couple of clicks to any project. But now my boost DLLs are everywhere, I have one folder per boost library, and since there are dozens of those I can't even add them all at once to my PATH now, so I have to move them manually to the appropriate folder, and that is really not what I want to do with my not-so-precious-but-who-are-you-to-judge time
I have looked around and couldn't find any good practice regarding this issue, maybe because they are too obvious, or too specific to a particular setup.
How do you do? How would you do if you were me?
We put all our external dependencies in version control along with the code. This ensures that all code can build "out of the box" on any of our development machines and also ensures that for any given version of the code, we know exactly which dependencies is has.
The best way to check for missing dependencies is how have a good automated test suite, if you've got comprehensive converge then if your tests pass you must have deployed the required libraries.
In terms of linking to the appropriate libraries, unfortunately, that just sounds like an issue with the structure of OpenCV (I'm not familiar with OpenCV). I tend to use dumpbin under Windows and nm under Linux to easily grep for symbols when I get link errors with an unfamiliar library.
I want build latest harfbuzz-ng library on Windows 7. But in build system by default I must go through long quest to gain: ragel, pkg-config, gtkdocize and other stuff. Even in the end if I get all what need for build system I get errors (sorry cannot say which concrete errors), last time I tried to build this library 2 month ago). Maybe on Linux system it is easy to get and build all this stuff but on Windows always something doesn't want to be compiled. Or the problem is that I don't find instructions which guide me on Windows, only Linux.
What I want to get is simple instructions how build only harfbuzz-ng with freetype dependency (and maybe add ICU) by MinGW compiler on Windows.
Thanks you very much.
For anyone reading this, have a look at harfbuzz.cc in the project which makes you able to use harfbuzz without any build system, just include it in one of your sources, no build system is required, define HB_NO_MT or even HB_TINY (which brings a minimal harfbuzz) if you don't use harfbuzz in multithread mode.
I don't know i this is the answer you are looking for. I am trying to work with Harfbuzz as well and did this through several attempts which did not work out for various reasons.
One (old) example you could use as a starter is: HarfBuzz static lib. The .lib-file generated works with UCDN and just needs this file plus a source for the Freetype-functions to provide the necessary FT_Face-parameter (i did this by compiling another .lib via the freetype-sourcecode (freetype.org/download.html).
But I am unsure if this will work out for the MinGW-compiler (you don't use VC++ as IDE do you??).
You may find of interest the MSYS2 build system. It is essentially a linux-style packaging system built on top of Windows(TM). You can download and install binary packages with simple commands (including automatic dependency solving). If you want to download a source package you can do that as well. http://msys2.github.io
The situation is the following: I have the source code of one programm (lets call it programA) (written in C and C++), as well as the CMakeLists.txt and CTestConfig.cmake files. I already installed programA using CMake's graphical user interface and, as it is obvious, it worked. It created the .exe file (I'm working on Windows 7 OS).
The problem is that, right now, I've been asked to edit the program (and so, I must be able to edit the code and degugging it as changes are made). I also need to compile it but not in .exe anymore but in .dll so I can add it to a website we have.
I've read in forums that CMake can compile programA into a .dll if I need to, but as I would need to make some changes I consider that CMake debugging is not as useful and easy as using entirely VS. From the little I know from CMake language, the CMakeLists.txt is mainly used to check the OS of the user as well as adding some libraries in case they are not found.
I have to admit I have no idea in programming CMake directives, as I have been working with ASP.NET, C, C++ and C# mostly. Then, my idea is to try to work only in visual studio 2010 instead of using cmake as well, so once I have the program 'adapted' to VS and can be compiled just using VS, I'm ready to start my job. So the question I have is how can I perform the same task CMake did just using Visual Studio (Is there any way of implementing CMake directives in VS?), can VS compile by receiving as an argument something similar to that CMake.txt file (though it needs to be translated into another language)?
To skip the use of CMake I tried to copy the source code into a new project in VS. However as it does not use the CMake directives when compiling, it gives several errors, most of them related to the fact that some headers.h can't be found (cause they might be in a subfolder). And there are so many subfolders to add the paths to the predefined directories of search that it would take ages.
I'm sorry I can't be more precise in my explanation. I'm good at programming little projects on my own, but it's the first time I have to work on other's programm. Please don't hesitate to ask if anything was not properly understood
I would appreciate a lot any suggestion / advice /guidance you can give.
To make a dll, use add_library command and the SHARED keyword
add_library(mylib SHARED ${files})
this is easy with CMake, don't go back in visual that will be harder at the end
The Good News
Fortunately, cmake can generate VS Projects automaticaly for you (this tutorial s specific for OpenTissue, but Steps 1 to 3 should be the same for you).
The [not so] Bad News
Depending on the complexity of the project, VS Projects automaticaly generated by cmake can get pretty nasty, to the point of illegibility. It will, for example, hard link any library dependencies using the specific paths of your machine, so the project will most certainly not be portable across setups. In any case, that's the intended bahavior, because the primary idea of supporting this generator is simply making it work, thus allowing users to easily compile projects using MSVC, so there's not much you can do here. Nonetheless, it should work in your machine and will certainly be a great starting point for you, just create a project yourself from scratch copying the relevant parts out of the automatic generated version.