cmake: Fix IF_CHECK_PASSED option handling #31231

1. 
   hebasto commented at 9:01 am on November 6, 2024: member

   IF_CHECK_PASSED is a multi-value keyword, resulting in a list value. Convert it to a string before applying any string() command.

   Split from #30861.

   No current CMake code is affected by this bug.

2. cmake: Fix `IF_CHECK_PASSED` option handling

   `IF_CHECK_PASSED` is a multi-value keyword, resulting in a list value.
   Convert it to a string before applying any `string()` command.

   97a18c8545
3. hebasto added the label Bug on Nov 6, 2024
4. hebasto added the label Build system on Nov 6, 2024
5. 
   DrahtBot commented at 9:02 am on November 6, 2024: contributor

   The following sections might be updated with supplementary metadata relevant to reviewers and maintainers.

   Code Coverage & Benchmarks

   For details see: https://corecheck.dev/bitcoin/bitcoin/pulls/31231.

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6. theuni approved
7. 
   theuni commented at 8:24 pm on December 3, 2024: member

   utACK 97a18c85458b898fe5e3abda9528a2de442766ad

   Confirmed that this indeed a list.

   To other reviewers: the string(STRIP "${foo} ${bar}" ${baz}) syntax is confusing. It’s just concatenating foo and bar and storing it in baz with no whitespace at the beginning or end. @hebasto Is there a way to get CMake to warn us about these? It seems like it should know that we were attempting a string operation on a list.

8. 
   hebasto commented at 8:34 pm on December 3, 2024: member

   @hebasto Is there a way to get CMake to warn us about these? It seems like it should know that we were attempting a string operation on a list.

   I’m not aware of any such embedded functionality. CMake’s internally represents both “strings” and “lists” as strings. A list can safely be treated as a string when it contains fewer than two elements.

9. fanquake merged this on Dec 6, 2024
10. fanquake closed this on Dec 6, 2024

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11. hebasto deleted the branch on Dec 6, 2024
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