Return to standard settings.compiler.libcxx naming

[vok1980]

No description provided.

[SSE4]

@vok1980 right now valid compiler.libcxx values for clang are:

libcxx: [libstdc++, libstdc++11, libc++, c++_shared, c++_static]

c++_shared and c++_static were added by conan-io/conan#4538, and they both refer to libc++ (which might be confusing), and were added to match Android NDK values:

The shared library for libc++ is libc++_shared.so, and the static library is libc++_static.a.

so I believe code should be:

if not str(self.settings.compiler.libcxx) in ["c++_shared", "c++_static", "libc++"]:

and libcxx_shared option is not needed (as compiler.libcxx setting already models that).
I'd also prefer build.py building for both c++_shared and c++_static if possible (as they are used).
libc++ was used in recipe before, due to the settings.yml had no c++_shared/c++_static. right now, libc++ is used mainly for Linux/Mac, while Android has "c++_shared", "c++_static".
I understand it might be confusing, but let's not add new option to cause even more confusion.

[vok1980]

@vok1980 right now valid compiler.libcxx values for clang are:

libcxx: [libstdc++, libstdc++11, libc++, c++_shared, c++_static]

c++_shared and c++_static were added by conan-io/conan#4538, and they both refer to libc++ (which might be confusing), and were added to match Android NDK values:

The shared library for libc++ is libc++_shared.so, and the static library is libc++_static.a.

so I believe code should be:

if not str(self.settings.compiler.libcxx) in ["c++_shared", "c++_static", "libc++"]:

and libcxx_shared option is not needed (as compiler.libcxx setting already models that).
I'd also prefer build.py building for both c++_shared and c++_static if possible (as they are used).
libc++ was used in recipe before, due to the settings.yml had no c++_shared/c++_static. right now, libc++ is used mainly for Linux/Mac, while Android has "c++_shared", "c++_static".
I understand it might be confusing, but let's not add new option to cause even more confusion.

ok.
See #9