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Z"e e"d$d � q�dS dS )%z�PEP 656 support.
This module implements logic to detect if the currently running Python is
linked against musl, and what musl version is used.
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|vr� dS | S dS )z�Detect musl libc location by parsing the Python executable.
Based on: https://gist.github.com/lyssdod/f51579ae8d93c8657a5564aefc2ffbca
ELF header: https://refspecs.linuxfoundation.org/elf/gabi4+/ch4.eheader.html
r �16BN� s ELF�HHI� )�IIIIHHH�IIIIIIII)r r r )�QQQIHHH�IIQQQQQQ)r � � )r r � � �musl)�seekr r �error�tupler �KeyError�operator�
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�S )a` Detect currently-running musl runtime version.
This is done by checking the specified executable's dynamic linking
information, and invoking the loader to parse its output for a version
string. If the loader is musl, the output would be something like::
musl libc (x86_64)
Version 1.2.2
Dynamic Program Loader
�rbNT)�stderr�universal_newlines) �
contextlib� ExitStack�
enter_context�open�OSErrorr7 �
subprocess�run�PIPErM rP )rN �stackr �ld�procr r r �_get_musl_versionV s
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r] �archc c sJ � t tj�}|du r dS t|jdd�D ]}d|j� d|� d| � �V qdS )aT Generate musllinux tags compatible to the current platform.
:param arch: Should be the part of platform tag after the ``linux_``
prefix, e.g. ``x86_64``. The ``linux_`` prefix is assumed as a
prerequisite for the current platform to be musllinux-compatible.
:returns: An iterator of compatible musllinux tags.
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musllinux_r. )r] �sysrN r% r: r9 )r^ �sys_muslr: r r r �
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