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```pex: error: argument --platform: linux_x86_64 i...
# general
b
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pex: error: argument --platform: linux_x86_64 is an invalid platform:
Not a valid platform specifier: linux_x86_64

Platform strings must be in one of two forms:
1. Canonical: <platform>-<python impl abbr>-<python version>-<abi>
2. Abbreviated: <platform>-<python impl abbr>-<python version>-<abbr abi>

Given a canonical platform string for CPython 3.7.5 running on 64 bit linux of:
  linux-x86_64-cp-37-cp37m

Where the fields above are:
+ <platform>: linux-x86_64 
+ <python impl abbr>: cp
+ <python version>: 37
+ <abi>: cp37m

The abbreviated platform string is:
  linux-x86_64-cp-37-m

Some other canonical platform string examples:
+ OSX CPython: macosx-10.13-x86_64-cp-36-cp36m
+ Linux PyPy: linux-x86_64-pp-273-pypy_73.
need abit of help with definition of pants file
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python_library()

pex_binary(
    name="run",
    dependencies=[":test"],
    entry_point="test.py",
    platforms=[
       'current',
       'linux_x86_64',
       'macosx-10.7-x86_64',
    ],
)
i am building this pex binary on MAC but i want to ship to a linux server to run eventually
h
I think you want 
linux-x86_64
but you have 
linux_x86_64
? (that first underscore should be a dash)
b
so i am building my pex binary on macosx so I assume that will factor into it if i want to execute the pex binary on linux right? so I should build the pex binary on a linux instance first?
h
You can only build a cross-platform pex if all the transitive requirements are available as wheels
If not then you'll probably want to build separately on each platform
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