cppfmtlib/fmt #4441Not a task: already works

CPack error on Windows with NSIS due to invalid character in component name 'fmt-core'

envgap__fmtlib__fmt-4441

Original GitHub issue ↗Dated source checkout ↗Opened 2025-05-09

01 / FAILURE SIGNATURE

As reported upstream

`Error: invalid characters in variable name "fmt-core_selected", use only characters [a-z][A-Z][0-9], '.' and '_'` as NSIS cannot have the `-` character in variable names.

Not a benchmark task.

The project already builds and runs before the fix, so there is nothing to repair.

02 / ENVIRONMENT RECIPE

Base commit: eb9a95d42688b32289c00c2b802ea650f57d4481
Manifest: CMakeLists.txt
Reproduce: Awaiting issue-specific recipe
Run under trace: Awaiting a meaningful runtime command

03 / ORIGINAL ISSUE TEXT

fmtlib/fmt #4441 · read the original issue

> The header-only mode is not recommended and we shouldn't change install behavior based on it but a PR to rename the component to `fmt-core` is welcome (fmtlib is the name of the github org, not the project). I think it can be done unconditionally since the name is global. 

 _Originally posted by @vitaut in [#4283](https://github.com/fmtlib/fmt/issues/4283#issuecomment-2568124123)_

The rename of the "core" package to "fmt-core" causes CPack packaging with NSIS on Windows to fail with the message
`Error: invalid characters in variable name "fmt-core_selected", use only characters [a-z][A-Z][0-9], '.' and '_'` as NSIS cannot have the `-` character in variable names.

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