vcpkg_execute_required_process not setting OUTPUT_VARIABLE? #39131
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Maybe one or more of these triplet options could help? Then you can run |
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Keep your existing batch script and add VC_VARS to one or more of the 3 in a custom triplet. |
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Still confused, the problem is that VC_VARS isn't getting set. How would I get it to be set based on the output of the batch script. Also, shouldn't what I'm doing be working as-is? |
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I misunderstood, I misread it to say the variable was no longer set when vcpkg was running cmake in build mode versus script mode. Hmm, I tried 50 million ways with the single quote, double quote and tick mark (reverse single quote) and kept getting the same results as you - yes the log file had all the information you are seeking, it just is not getting set in the I guess I would say this is not working - so I would turn this into a problem ticket. |
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Please put the full question in the initial post. |
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I've made a stackoverflow question about this, so I thought I'd just link it instead of repeating the question here: https://stackoverflow.com/questions/78577338/vcpkg-execute-required-process-not-setting-output-variable
Since I'm very new to cmake/vcpkg, I assume I'm making some simple mistake, but my coworkers who have a bit more experience with them couldn't see the problem.
Edit: I've copied the question from SO below
I'm not very familiar w/ cmake or vcpkg, but I've been assigned to work on a task to build some libraries using a tool which wraps the latter.
My goal, in the interests of perhaps helping me solve this XY problem, is to follow the directions from https://unicode-org.github.io/icu/userguide/icu4c/build.html#how-to-build-and-install-on-windows-with-cygwin, which tell you to run vcvars.bat before running configure.
My constraint is that I have to implement the build process from within a vcpkg 'port' .cmake file, so I can't simply CALL the batch file directly to affect vcpkg/cmake's environment.
My idea was to run another shell script which runs vcvars.bat & then echo the relevant details to stdout, and to have cmake parse that output & explicitly set the environment based on that.
My new script which implements that idea, called GetVCVars.bat looks like
The relevant fragment of associated cmake logic is
The weird thing is, that when I test this, that I get the output -- VC_VARS = '' (Which I interpret to mean that the output variable I told vcpkg_execute_required_process to fill w/ the stdout of the invoked command was either not set, or set to an empty string???), even though a file called GetVCVars-build_configuration-release-out.log gets created with the content
(i.e. what I expected)
I don't understand what I've done wrong (https://learn.microsoft.com/en-us/vcpkg/maintainers/functions/vcpkg_execute_required_process#output_variable)?
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