问题
I'm trying to maintain one repository, most everything in my code base is source, but we've got the QuickPDF library which is a bunch of precompiled DCU's. I'd like to put them in version control somehow but I don't want to have yet another option set for win64 that I'm going to forget about before I convert the rest of my trillion LOC codebase to win64.
What I was thinking was just having (and quickPDF is just an example, there's nothing special about this library other than its unfortunate precompiledness)
- ctrls\quickpdf\QuickPDF.pas
- ctrls\quickpdf\win32[*.dcu]
- ctrls\quickpdf\win64[*.dcu]
From the looks of the folders in Program Files, Embarcadero does something similar with the VCL. There are even some precompiled things there, like VCL.Imaging.JPEG.pas.
How do I do the same thing? Do I need to specify win32 and win64 folders, or is there some magic somewhere I can tap in to?
回答1:
The magic you are talking about can be seen in the .dproj file for a plain vanilla XE2 VCL Forms app. The key ingredients are these variables:
$(Platform)which can be Win32 or Win64 on Windows.$(Config)which is commonly either Debug or Release.
Then in the .dproj file the following XML performs the magic:
<PropertyGroup Condition="'$(Base)'!=''">
<DCC_DcuOutput>.\$(Platform)\$(Config)</DCC_DcuOutput>
<DCC_ExeOutput>.\$(Platform)\$(Config)</DCC_ExeOutput>
</PropertyGroup>
You can use such tricks with the $(Platform) and $(Config) variables with any of the project options. So you just need to use these variables to set whatever option needs to be set for the compiler to find your pre-compiled DCUs.
To the best of my knowledge the option you need to set is the Search Path. Although I admit to being hazy about how the search path works since I personally never rely on search path and always explicitly include all source files in my projects. In your example you would add ctrls\quickpdf\($Platform) to the search path.
回答2:
That's simple, add:
- ..\ctrls\quickpdf\$(Platform)
to your projects search path
Although you'll be surprised when you find this actually works since it shows up grayed out in the IDE.
来源：https://stackoverflow.com/questions/8417018/how-can-i-compile-32-and-64-bit-dcus-into-separate-directories