Add the abseil/20200205

[Minimonium]

Specify library name and version: abseil/20200205

Closes #710

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

[conan-center-bot]

Some configurations of 'abseil/20200205' failed in build 1 (0275a7525b2bcec0ec0723c21cbd1d553fcfe039):

• Linux x86_64, Release, gcc 5, libstdc++
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[Minimonium]

@danimtb Abseil requires at least C++11. Are there any updates on how to handle this in CCI PRs?

[conan-center-bot]

Some configurations of 'abseil/20200205' failed in build 2 (ca110d788d696ad35aec551d2c0265576ffa8e7c):

• Linux x86_64, Release, gcc 5, libstdc++
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[Minimonium]

#error This file requires compiler and library support for the ISO C++ 2011 standard. This support must be enabled with the -std=c++11 or -std=gnu++11 compiler options.

🙂

[SSE4]

we need to do something about projects requiring non-default cppstd.
this is 2020, and many projects are already started requiring modern standards (C++11, C++17, C++20).
I believe we should somehow allow the building of more configuration in CCI.
however, that may blow up a lot of unnecessary builds in many cases.
we have to think carefully about it. maybe the recipe should somehow indicate if it needs special standard(s)?
what do you think @uilianries @danimtb ?

[Minimonium]

How does the C3I handle the package_id? Could it be possible to preparse it to extract the information relevant to which configurations we should do builds?

We don't really have a choice but to generate additional configurations in some cases. We can't assume that it's fine to use a non-default cppstd without actually marking it in the profile. Some libraries do break the ABI on the same library version but on different standard flags - Boost and Abseil do that if I recall correctly.

Other libraries could, for example, erase it in their package_id. The main goal is to have default packages compatible for all users as much as possible.

[danimtb]

Related to #54 Please comment anything there related to this topic

[uilianries]

I don't like it for all versions. From my experience, Abseil changes the library constantly. I would say you should create one recipe per version. However, creating one recipe version is boring, and only the cpp_info.libs will change. So, we could accept the lib list in conandata.yml, but it requires a filter there is conan-center hook.

[Minimonium]

A good idea! The all folder is kinda a placeholder. Shouldn't be a problem to split recipes into different folders later on, isn't it?

[danimtb]

I am not a big fan of the idea of having this information in the conandata.yml file, as it will be harder to read and it is mainly used (in this repo) for things related to sources. But you can always make the libs conditional to the version of the recipe if you want to keep one recipe for all of them (easier to maintain). @Minimonium in case the recipe diverges too much we can always split it to one for each version

[conan-center-bot]

Some configurations of 'abseil/20200205' failed in build 3 (b7d8026fa5c0b2e04f226589b6fc9040c3f990bb):

• Linux x86_64, Release, gcc 5, libstdc++
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[conan-center-bot]

Some configurations of 'abseil/20200205' failed in build 4 (fd555cb66e4f8f1fa5a5bfa753f47d6bb11b6225):

• Linux x86_64, Release, gcc 5, libstdc++
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[conan-center-bot]

Some configurations of 'abseil/20200205' failed in build 5 (517659815c106710273778960fc5e07fede07b35):

• Linux x86_64, Release, gcc 6, libstdc++11
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• Linux x86_64, Debug, gcc 6, libstdc++11
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[conan-center-bot]

Some configurations of 'abseil/20200205' failed in build 6 (a6901311dbbeb16bbde542ae92769d65c5e435f1):

• Linux x86_64, Release, gcc 6, libstdc++11
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• Linux x86_64, Debug, gcc 6, libstdc++11
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[conan-center-bot]

Some configurations of 'abseil/20200205' failed in build 7 (f717cd43a2abcbd64e7311a2daebda51dc5d736a):

• Linux x86_64, Debug, gcc 6, libstdc++11
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• Linux x86_64, Release, gcc 6, libstdc++11
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[conan-center-bot]

All green in build 8 (98b864782bb70e28164e08f0c1218aff9a708e25)! 😊

• abseil/20200205: Generated 44 packages. All logs here

[Minimonium]

Nailed it.

[Samuel-Tyler]

Thanks for getting this done!