Add gsl/2.7

[rl-enjoyer]

Specify library name and version: gsl/2.7

This is also a good place to share with all of us why you are submitting this PR (specially if it is a new addition to ConanCenter): is it a dependency of other libraries you want to package? Are you the author of the library? Thanks!

close #6097

---

• I've followed the PEP8 style guides for Python code in the recipes.
• I've read the guidelines for contributing.
• I've used the latest Conan client version.
• I've tried at least one configuration locally with the
  conan-center hook activated.

[CLAassistant]

All committers have signed the CLA.

[rl-enjoyer]

Implements #6097

[Croydon]

Split out the changes in the .gitignore file to a separate pull request

[rl-enjoyer]

@Croydon , I am confused as to what the error is telling me. Was wondering if you could provide guidance?

[uilianries]

@NolanC33 Consider rl-enjoyer#1

[rl-enjoyer]

Seems like KB-H061 is missing from the error knowledge base markdown?

Seems so.
The error message shows the line number containing the offending code.
You can't use tools.os_info.is_windows in build_requirements.
Replace it with self._settings_build.os == "Windows" and create a _settings_build helper method.

You can find an example in the swig recipe.

Awesome, thanks. Out of curiosity, what's the rationale behind that requirement?

[madebr]

This was the trigger: #6348 (comment)

[rl-enjoyer]

will remove conan. from lines 131 and 132

[rl-enjoyer]

Not too sure about the other error:

m4/1.4.18: WARN: Lib folder doesn't exist, can't collect libraries: C:\J\w\BuildSingleReference@9\.conan\data\m4\1.4.18\_\_\package\0a420ff5c47119e668867cdb51baff0eca1fdb68\lib
autoconf/2.71: WARN: Lib folder doesn't exist, can't collect libraries: C:\J\w\BuildSingleReference@9\.conan\data\autoconf\2.71\_\_\package\5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9\lib

[madebr]

Those are warnings.
They are emitted by a loose check of the conan-center hook.
It does a call to tools.collect_libs(ConanFile), which warns if the directories in self.cpp_info.libdirs do not exist.
The autoconf and m4 package do not ship a library, only scripts/executables (so there is no lib subfolder)

To eliminate these types of warnings, I have added self.cpp_info.libdirs = [] in my recent m4 recipe.

[rl-enjoyer]

Ah ok. They do seem to sink the build though. At least I can't find anything else in the log that could be it. Also interesting how the warnings arise on only one configuration for both 2.6 & 2.7.

[madebr]

Those are warnings, the error was due to the typo bug in the package method.
It looks like the build is succeeding now.
There are only Visual Studio jobs in the build queue now.

[rl-enjoyer]

Ok cool. If you look at https://c3i.jfrog.io/c3i/misc/logs/pr/6098/17-configs/windows-visual_studio/gsl/2.7//995e0f0b86a651012a3bfca00d60f35ae037db5e-build.txt you see the complaint about the libs. And not the complaint about the rename typo. (from https://c3i.jfrog.io/c3i/misc/summary.html?json=https://c3i.jfrog.io/c3i/misc/logs/pr/6098/17-configs/windows-visual_studio/gsl/2.7//summary.json)

Now if you look at https://c3i.jfrog.io/c3i/misc/logs/pr/6098/17-configs/windows-visual_studio/gsl/2.7//f42ebec2d0ee7d5c41713cd8eee15cf988b0d202-build.txt it complains about the rename typo and not the libs. (also from https://c3i.jfrog.io/c3i/misc/summary.html?json=https://c3i.jfrog.io/c3i/misc/logs/pr/6098/17-configs/windows-visual_studio/gsl/2.7//summary.json)

I suppose we'll see once the current jobs are done, but if f42ebec2d0ee7d5c41713cd8eee15cf988b0d202 failed because of the typo, would we expect to see that in the 995e0f0b86a651012a3bfca00d60f35ae037db5elog as well?

[madebr]

The warning about the libdirs is shown after executing the package_info method (because it verifies self.cpp_info.libdirs).
So that warning is always shown at the very end.

The rename typo bug happens in package, way before package_info, so the warning is not there.

[rl-enjoyer]

The warning about the libdirs is shown after executing the package_info method (because it verifies self.cpp_info.libdirs).
So that warning is always shown at the very end.

The rename typo bug happens in package, way before package_info, so the warning is not there.

Ahh ok, thanks

[rl-enjoyer]

Sorry about that. Didn't mean to dismiss your review. Could you repost it? @madebr

[conan-center-bot]

All green in build 20 (3e11dbf9fe3a4dbbbadfab7f3fd01195b338408a):

• gsl/2.7@:
  All packages built successfully! (All logs)

• gsl/2.6@:
  All packages built successfully! (All logs)

[rl-enjoyer]

Do I need to rebase this off master?

[madebr]

That's not needed.
The bot will take care of that.
Since you're contributing a complete new recipe, there's 0% change on merge conflicts.

[uilianries]

LGTM