Hi Chuck,
On Thu, Jun 30, 2022 at 2:13 PM Charles R Harris
<[email protected]> wrote:
>
>
>
> On Wed, Jun 29, 2022 at 5:26 PM Matthew Brett <[email protected]> wrote:
>>
>> Hi,
>>
>> I am very sorry - I feel I should know this, or be able to work it
>> out, but is there a way of setting the flags to the C compiler and the
>> linker, for the Numpy build, on Windows?
>>
>> I'm trying to set the flags for a build with Windows mingw-w64 - but I
>> believe Numpy is ignoring $env:LDFLAGS, $env:CFLAGS and $env:OPT - and
>> I can't see any way of setting these options from the command line.
>> Am I missing something?
>>
>> Cheers,
>>
>> Matthew
>
>
> I don't know how you are using env, but variables set that way are local to
> the shell in which they are set. In PS that is every separate shell
> invocation.
Maybe you are thinking of local PS variables? $env: variables do get
passed to subshells, like exported Bash variables.
"""
# show_env.py
import os
print('MY VAR', os.environ.get('MY_VAR'))
print('LOCAL VAR', os.environ.get('LOCAL_VAR'))
"""
Then:
"""
PS C:\tmp> $env:MY_VAR = 'foo'
PS C:\tmp> $LOCAL_VAR = 'bar'
PS C:\tmp> python .\show_env.py
"""
gives
"""
MY VAR foo
LOCAL VAR None
"""
Cheers,
Matthew
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