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https://issues.apache.org/jira/browse/SVN-4654?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15502719#comment-15502719
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Daniel Shahaf commented on SVN-4654:
------------------------------------

It's trying to execute "/lib64" with arguments "/usr/lib" and
"/usr/lib64".

I think your shell parses the code

    LDFLAGS="$LDFLAGS ` input_flags="$apr_ldflags" output_flags="" 
filtered_dirs="/lib /lib64 /usr/lib /usr/lib64"

as a pre-command assignment «LDFLAGS="…" /lib64 /usr/lib /usr/lib64»,
i.e., an instance of the "set an environment variable for one command"
syntax.


> configure: command substitution for SVN_REMOVE_STANDARD_LIB_DIRS fails with 
> POSIX backticks on HP-UX
> ----------------------------------------------------------------------------------------------------
>
>                 Key: SVN-4654
>                 URL: https://issues.apache.org/jira/browse/SVN-4654
>             Project: Subversion
>          Issue Type: Bug
>          Components: compile, install
>    Affects Versions: 1.9.4, trunk
>         Environment: $ uname -a
> HP-UX blnn724x B.11.31 U ia64 HP-UX
>            Reporter: Michael Osipov
>         Attachments: SVN-4654.patch, configure-reduced.tar.gz, 
> configure.err.tar.gz
>
>
> When running {{configure}} on HP-UX, you see several times 
> {{./configure\[4880\]: : Execute permission denied.}} and 
> {{./configure\[4880\]: /lib64:  not found.}}.
> This is caused by having the command substitution perfomed by backticks 
> {{LDFLAGS="`SVN_REMOVE_STANDARD_LIB_DIR(...)`"}} and not with standard POSIX 
> {{$()}}.
> See attached trace output w/o patch and with patch applied.



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