Update/fix cmake fail with no error

[dmitri-mcguckin]

Originating Project/Creator	JPL
Affected Component	n/a
Affected Architectures(s)	CMake
Related Issue(s)	#1850
Has Unit Tests (y/n)	n/a
Builds Without Errors (y/n)	yes
Unit Tests Pass (y/n)
Documentation Included (y/n)	yes

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Change Description

This is the proposed fix to some of the logging problems discussed in Issue #1850. It adds documentation to docs/INSTALL.md for a situation in which CMake fails due to permission issues but does not relay the reason for this failure.

• Update the troubleshooting section in docs/INSTALL.md addressing the permission issues seen in fprime-util Fails to generate build: "Failed to run fpp-locate-deps" with no error message #1850
• Modify fpp_locs.cmake to add exit reason to failure message

Rationale

The goal of this is to improve logging while troubleshooting situations where F' does not build.

Testing/Review Recommendations

n/a

Future Work

It may be possible to ad-hoc modify permissions of the helper script at build-time.

Something as simple as this could achieve this behavior

execute_process(COMMAND "chmod 700 ${FPP_LOCATE_DEFS_HELPER}")

Although there's already plenty of discussion regarding if CMake should even be allowed to do this if it's not part of a system install.

I'm open to suggestions/comments.

[thomas-bc]

Passing down error messages is always a good idea in my opinion!
Adding a few comments, but this looks good to me.

[LeStarch]

This PR is against the master branch. We should switch it to devel.

[dmitri-mcguckin]

Hmn, looks like the CI keeps failing because there are no Raspberry Pi runners available.

Since this change is mostly logging related anyhow, do we want to forego that step of the CI?

Please advise.

[LeStarch]

This change does not require RPI to pass the build. @thomas-bc are you ready to merge this?

[thomas-bc]

@LeStarch ready to merge