I have a solution where there is a dependency on 7zip's sfx. Out of desire to keep the entire solution (plus the sfx) managed and coordinated, I want to create a new project to house all the source files that is used by sfx, and when building, execute a command line that tells 7zip to build a sfx from the source files, and place into the output so that it can be then referenced by actual Visual Studio projects within the same solution.
I think I can figure the command line by using Build events and providing the appropriate macros to ensure that the 7zip's output is placed into the target folder with appropriate name so that it can be then correctly referenced by other VS projects. But what I am not sure about is what Visual Studio project I need to use or steps to take to tell Visual Studio that there isn't going to be any code to be compiled in this project and it just has to execute this script I give it.
The closest thing I can come up with is VS's Make project but I don't know if that is the right thing since this has nothing to do with Make at all.
So, what is the Visual Studio project template I need to use? If empty, then what configuration do I need to perform so that it won't try and look for some code files to compile but instead just execute scripts as part of the solution's build?
For now, it seems that using C++ Makefile Project works. I had to make few configurations:
1) I had to specify the project's "Configuration Type" as "Utility"
2) I used Pre-Build event and provided a command to invoke a batch file included in the project. The batch file then takes care of everything.
3) Normally, non C++ files are not considered for determining whether build is needed or if it's already up to date. To ensure that a new build is perform if the batch file or other key files are edited, I set the file's "File Type" to "MakeFile". Even though it isn't actually a Make file, it ensures that any edits made to the file will cause a new build.
The downsides I've found so far are:
1) C++ uses "Filters", not folders. Therefore, keeping the files in same directory structure is a big PITA. One can "include" files and get a one-to-one mapping between "Filters" and the actual directory structure on disk but it's annoying and tedious. Wish it was a C# project
2) I'm a bit wary about how it will detect new files or other changes for files that I didn't explicitly set to "MakeFile". I expect the source to be stable but I worry that when I realize I need a new file and add it, I might forget and not notice that the build is not correctly including the new file.
I'm not sure if this is the best method but this works for my purpose - having a project to manage external tools as part of bigger build process.
We have a C++ project that uses a custom object-relational-mapping system, in which tables are defined by .tbl files. These are then run through a code-generator that creates, for each, a .h and a .cpp file.
I'm trying to get a custom build rule working for this, in Visual Studio 2008 and 2010.
This is what I have, so far:
<?xml version="1.0" encoding="utf-8"?>
<VisualStudioToolFile
Name="z_dbbld"
Version="8.00"
>
<Rules>
<CustomBuildRule
Name="z_dbbld"
DisplayName="z_dbbld"
CommandLine="$(SolutionDir)\tools\z_dbbld $(InputName)"
Outputs="$(InputName).cpp"
FileExtensions="*.tbl"
ExecutionDescription="z_dbbld $(InputName)"
>
<Properties>
</Properties>
</CustomBuildRule>
</Rules>
</VisualStudioToolFile>
The problem is the dependencies. When I run a build on a clean checkout, where none of the files exist, I get "Cannot open include file" errors, for .h files that are generated by this rule.
I've tried changing Outputs to "$(InputName).h", and I still get the errors.
Now the thing is that these files are created, when the code generator runs. If I compile again, I don't have the errors, because all of the files were created in the first pass. But it makes doing a clean, automated, build from fresh checkout not work.
Any ideas?
I think you need to specify the Output files in the main part of the build (looking at the very last sentence of http://msdn.microsoft.com/en-us/library/hefydhhy.aspx). Probably the easiest way to do that is to add a reference to the files when they exist and then delete them and see if the codegen step runs like it should.
The answer given by sblom is correct, but it does not explain the reason.
For each build rule (custom or native) the VS build system needs to know the complete list of inputs and outputs so that it can decide what part of the project needs to be built.
Your build rule declares the generated .cpp file as an output, so VS knows about it and will automatically build this file for you. Since you omitted the header file, VS does not know about it, so any source files that include this header will not know where to get it from and fail to build. A work around to get the build to work in this situation is to add the directory where this .h file is located to your include path, and then #includes of this file will work. You are basically enabling VS to know about this file in a different way.
Conversely, if you change your build rule to declare the header file as output, then source files that include it will know where to get this file from, but now VS does not know about your .cpp file so it won't build it. A work around for this case is to explicitly add the generated .cpp file to your project as a source file. Like in the above case, you are using a trick to get the build system to recognize the generated file.
But while the workarounds above will get you going they are not the best solution, since they just compensate for VS not knowing about a file. The best way to address this problem is to declare both the .cpp and the .h files as outputs in your rule, separating them with a semi-colon. This will enable VS to apply the correct behavior to both files.
I've written a command-line OpenCL compiler. I'd like to have VS compile my kernel source files using this whenever I build the C# project that includes them. I've looked around and found information and custom build tasks, custom tools, etc, but I haven't been able to get it to work correctly.
How can I tell VS to run my exe on the source files in the same way that it runs the c# compiler, etc for other files in the project?
I report errors from this tool by calling Console.Error.WriteLine(). This dutifully places the errors in the Output pane, where I can double-click them, taking me to the appropriate place in the .cl kernel source file. However, the errors don't appear in the VS error panel. ??
Alternatively, if anyone's aware of an existing OpenCL compiler - it's annoying to have to run the host application just to compile the kernel - I'd appreciate a link.
I've managed to get this working by adding a post-build step to the project options. However, I'd really prefer for this exe to be run for every *.cl file in the project.
Update I had neglected to include an error code when formatting my error messages. Correcting them to match any of the formats listed here took care of that issue. Still trying to figure out how to associate an exe with a given file extension, though.
For some reason when I open my project Compile button is disabled. I'm in C++ file and Ctrl+F7 doesn't work, Menu/Build/Compile is disabled and Compile in context menu in SolutionExplorer is disabled too. I can build project with F7, but I can't compile single file. It used to work just fine.
Any ideas why?
Had the same problem just because my project wasn't set as startup Project in my solution. Setting it solve the issue.
It seems that problem is on my side: someone in my team introduced some build scripts, which apparently work only for building whole project.
It might also be that a referenced property sheet could not be found. You can check this by attempting to view the properties of the project (Alt-Enter). A warning will be shown then when the property sheet cannot be found. Fix the property sheet reference, and probably you can compile again.
Note: question was asked/answered a while ago, but maybe it is useful for other persons.
My project was using an intermediate version of a unity build (sometimes called blob build) where groups of ~10 cpp files are put in the same compilation unit by being included in some blob_xxx.cpp. The project only considers the blob_xxx.cpp as source files, so technically the .cpp I was working on was not a source file for the project, so the Compile command was disabled (this is similar to what Paulius experienced).
In this case, you need to either select the blob_xxx.cpp file and Compile this single file, or switch to a non-blob build.
If your objective is to quickly test for compilation errors, you can comment out the includes for all the files you are not working on.
Alternatively, you may setup your project generation script to isolate the files you are working on in a separate blob (it's up to you to define what "working on" means; it may be a manual list or the list of cpp files that are checked out in Perforce if using it).
I have a Visual Studio project with about 60 C++ source files. I can do a build, and it completes without errors. But if I immediately hit F7 again, it always re-compiles about 50 of the source files. It doesn't re-compile all of the files, which is strange.
I have 'Enable minimal rebuild' (/Gm) set. Any ideas why it might be doing this?
None of the files have a Modified Date in the future.
Are any of your file dates in the future? This can occur if you changed time zones or changed the system clock time. Dates in the future will confuse the IDE and force a rebuild every time F7 or F5 is hit.
I've solved the same problem.
In my case compiler displayed warning, that /Zi option is required if /Gm is specified.
/Gm enables "minimum rebuild", which requires debug information in .pdb file. So, if you don't want to use .pdb, also disable minumum rebuild - it solved a problem in my case.
Most probably is a matter of dependencies.
Consider the following possibilities:
If you have custom build tools defined for some of the files in your solution, make sure that the output property contains the right file name(s). If the output of the build tool doesn't correspond to the one(s) specified in the output file names, the builder will rebuild that file.
If you have custom build events, check whether the output from those build events don't affect the dependencies of the files to be built.
I had problems when trying, at post-build, to copy or move some of the output files to a build folder. The post build operations that affect the timestamp of the ouput files of the build process will determine rebuild each time.
In my case of such effect (C++ via VS2005) it was on Release configuration only, and the Studio tells in the build output, that compiler option /Gm is ignored if /Zi - option is not set. After setting /Zi via
Configuration Properties -> C/C++ -> General -> Debug Information Format : Program Database (/Zi) ,
it was ok. But isn`t there something wrong, when the Release Configuration needs something about Debugging? Not yet clear to me!
Project Properties -> "C/C++" -> "Output Files" -> "Program Database File Name" option should not be empty. Set this option by selecting from drop-down box . The option will be set like this: $(IntDir)\vc90.pdb. And line ProgramDataBaseFileName="" will be removed from vcproj file.
Then only changed *.cpp files will be recompiled when you build the project or solution.
It seems that this problem can be caused by many things, but what fixed it for me was:
Closing Visual Studio
Manually deleting all bin and obj folders (Clean doesn't seem to do the trick)
Opening the solution and running Clean (I'm not sure if this is necessary, but I did it just in case...)
Building like normal
Note: This was for a C# program in Visual Studio 2010.
After a couple days of googling, I ended up with a solution to my problem.
I encountered this problem when I moved my projects to a new PC. I had checked several times the creation date of the files. These dates were up-to-date, however the modification dates were in the bast (kinda bizarre) even when I changed the files.
A simple update of the files resolved the problem.
I'm having the same problem, and it seems to be because I've turned browse information off. Properties->C/C++->Browse Info->Enable Browse Info->None. The only fix I've found is turning it back on. This is for an xbox 360 project, fwiw, my other projects don't have the problem.
A reason is if the 'date last modified' for one of the source file is set for some date in the future: it rebuilds, and then the source file is still later than the executable.
This problem with the dates can happen if the source file is located in a directory a remote machine (a network share), and/or may even happen if your machine's time isn't synchronised with the date of the machine which is running the server of your source version control system.
Check your project includes any .h header file that doesn't exist on disk. Always happens to me when I delete a header file I'm not actually including anywhere, but forget to delete it from my solution navigator in VS. Note: missing headers produce no errors during the build (when not #included anywhere).
Check your project's Program Database Filename setting. For some reason, if this is set to the name of a directory (such as "$(IntDir)\"), it can sometimes cause VS to rebuild your project every time, even if you're not generating PDB files (i.e. Debug Information Format is set to "Disabled").
This is a bug in VS2008; I have not yet reproduced it yet in VS2010, but my tests haven't been thorough, so I'm not confident saying that the behavior isn't present in VS2010.
What caused similar symptoms at me was:
I have several projects in a solution. There were .cpp files which were referenced (and therefore compiled) by >1 projects. Unfortunately Visual Studio creates .obj files with a very simple naming - it just replaces ".cpp" by ".obj". Creating wrapper .cpp-s with different named solved the problem.
I had something similar. Even though I did have pre and post build events, they weren't causing the issue. It turned out that I had a number of projects down the reference chain that had content files that were marked as "copy always" instead of "copy if newer" meaning that these projects were always considered "out of date". By changing all of these to "copy if newer", changes to my unit test project no longer forced a recompile of all of the other projects.
Disabling "minimal rebuild" (Configuration Properties > C/C++ > Code Generation) fixed it for me. The compiler even left a clue:
1>cl : Command line warning D9007 : '/Gm' requires '/Zi or /ZI'; option ignored
Although I must point out, the compiler did not ignore the option as it said.
In my case I changed system data time to previous date so it is rebuilding every time because of different time stamp of the files once changed to the current time its not rebuilding every time.
We have that here regularly:
delete all intermediate and output files by hand. The clean option in vstudio is sometimes not enough. From a fresh start do the complete build. If after a complete build vstudio still wants to recompile certain files it might be related to next bullet.
if in your vcxproj a header file is referenced which is not on disk, the project is also recompiled. You might check this by some hidden feature described on MSDN blogs or just touch (i.e. click on it to open) all header files in the project exploder and see if one does not exist on disk
Had the same problem. Solved by:
-delete output folder (obj,exe,all files)
-run cygwin
-cd project folder
-run "touch *", which reset file modify date/time
-build and enjoy problem fixed
There is similar issue with project rebuild.
Visual Studio does not recompile but re-links a project every time on F7 hit.
Fix is simple. Try to open in Editor all files included into project (from Solution Explorer double click on each file) and remove from solution those files which do not exist.