The libevent file is there in the 5.0.10 tarball:

$ wget https://download.open-mpi.org/release/open-mpi/v5.0/openmpi-5.0.10.tar.gz
…snipped… 
$ tar tf openmpi-5.0.10.tar.gz| grep libevent-2.1.12-stable-ompi.tar.gz
openmpi-5.0.10/3rd-party/libevent-2.1.12-stable-ompi.tar.gz
$

I think you might want to check how the original tarball was unzipped, and/or 
make sure that the backing store didn’t somehow exclude saving that file.


> On Apr 28, 2026, at 7:09 PM, [email protected] wrote:
> 
> Hello Howard,
> 
> Thank you so much for your time and help!
> 
> "'Pritchard Jr., Howard' via Open MPI users" <[email protected]> 
> escribió:
> 
>> Hello Jorge,
>> 
>> Could you check if /home/bigpack/openmpi-paq/openmpi-5.0.10/3rd-party
> 
> I followed the usual procedure, i.e. I downloaded the file
> https://download.open-mpi.org/release/open-mpi/v5.0/openmpi-5.0.10.tar.gz
> and configure it.
> 
>> has libevent-2.1.12-stable-ompi.tar.gz present?
> 
> However, there is no such file, i.e.
> 
> configure: Expanding ./3rd-party/libevent-2.1.12-stable-ompi.tar.gz in 
> 3rd-party
> ./configure: line 60632: 
> /home/bigpack/openmpi-paq/openmpi-5.0.10/3rd-party/libevent-2.1.12-stable-ompi.tar.gz:
>  No such file or directory
> tar: This does not look like a tar archive
> tar: Exiting with failure status due to previous errors
> configure: error: failed to extract 
> 3rd-party/libevent-2.1.12-stable-ompi.tar.gz
> configure: ===== configuring 3rd-party/libevent-2.1.12-stable-ompi =====
> configure: WARNING: no configuration information is in 
> 3rd-party/libevent-2.1.12-stable-ompi
> configure: ===== done with 3rd-party/libevent-2.1.12-stable-ompi configure 
> =====
> ./configure: line 60909: test: -eq: unary operator expected
> configure: error: Could not find viable libevent build.
> 
>> It should be there.  It may be possible something is wrong with the g(un)zip 
>> utilities on your system?
> 
> Ok, I'll check it just in case.
> 
>> If the tarball is present in 3rd-party why don’t you try running the 
>> following in the following in the 3rd-party directory:
>> 
>> gunzip libevent-2.1.12-stable-ompi.tar.gz | tar xf –
> 
> Ok but, again, there is not any file.
> 
>> and see what’s happens.
>> 
>> You may also want to check in the config.log in the top level directory of 
>> your unpacked Open MPI for “gzip” and see where the configury thinks your 
>> gzip command is located.
> 
> Ok.
> 
> Thanks again!
> 
> Regards.
> Jorge.
> 
> 
>> Howard
>> 
>> 
>> 
>> From: <[email protected]> on behalf of "[email protected]" 
>> <[email protected]>
>> Reply-To: "[email protected]" <[email protected]>
>> Date: Tuesday, April 28, 2026 at 1:23 PM
>> To: Open MPI Users <[email protected]>
>> Subject: [EXTERNAL] [OMPI users] Where is the 
>> libevent-2.1.12-stable-ompi.tar.gz file ?
>> 
>> 
>> Hi all,
>> 
>> I downloaded the 
>> openmpi-5.0.10.tar.gz<https://urldefense.com/v3/__https:/download.open-mpi.org/release/open-mpi/v5.0/openmpi-5.0.10.tar.gz__;!!Bt8fGhp8LhKGRg!AYxajar_k4gcP69SeOSe8tLYLNhyv3fxY4cqZldI_S9QOUvlEbVTQz9foo2jgbv5QqJH4opKZaTfoDJ7jggZd44$>
>>  package and I'm trying to build it using the
>> script given given in "Sec. 2.2. For problems building or installing Open 
>> MPI" of
>> https://docs.open-mpi.org/en/main/getting-help.html<https://urldefense.com/v3/__https:/docs.open-mpi.org/en/main/getting-help.html__;!!Bt8fGhp8LhKGRg!AYxajar_k4gcP69SeOSe8tLYLNhyv3fxY4cqZldI_S9QOUvlEbVTQz9foo2jgbv5QqJH4opKZaTfoDJ7_MkDPGU$>.
>> 
>> But it's failing me with the missing file 
>> /3rd-party/libevent-2.1.12-stable-ompi.tar.gz,
>> as follows:
>> 
>> *** Configuring Libevent
>> checking for libevent pkg-config name... libevent_core
>> checking if libevent pkg-config module exists... no
>> configure: Searching for libevent in default search paths
>> checking for libevent cppflags...
>> checking for libevent ldflags...
>> checking for libevent libs... -levent_core
>> checking for libevent static libs... -levent_core
>> checking for event2/event.h... no
>> configure: Expanding ./3rd-party/libevent-2.1.12-stable-ompi.tar.gz in 
>> 3rd-party
>> ./configure: line 60632: 
>> /home/bigpack/openmpi-paq/openmpi-5.0.10/3rd-party/libevent-2.1.12-stable-ompi.tar.gz:
>>  No such file or directory
>> 
>> Then, please, where can I download it?
>> 
>> Thanks in advance.
>> 
>> Regards.
>> Jorge D'Elia.
>> --
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> 
> 
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