[FLASH-USERS] linking error with HDF5

[ERNESTO ZURBRIGGEN]

Hi Adam!
At least in Debian-based Linux distributions the library associated with
the command *-lz* is *zlib1g-dev*.

Best,
Ernesto

On Thu, 20 Nov 2025 at 18:47, Liu, Baowei <baowei.liu at rochester.edu> wrote:

>
> Hello Adam,
>
> I'm afraid this issue might not be related to HDF5 but rather to a missing
> zlib library. If you have sysadmin privileges on the machine you use, you
> could try to use package managers such as apt, yum, or dnf to install zlib
> system-wide. Alternatively, you can download the source code from
> https://zlib.net/, then compile and install it -- using the same compiler
> you used to build Flash. Please let me know if still issues or other
> questions.
>
> Thanks,
> Baowei Liu
>
> On Nov 20, 2025, at 3:13 PM, Adam F Kowalski <Adam.F.Kowalski at Colorado.EDU>
> wrote:
>
> Dear Flash users,
>
> When I make Flash on a new machine, I get the following error:
>
> ...
> owalski/myhdf5stuff/build/ci-StdShar-GNUC/HDF5-2.0.0-Linux/HDF_Group/HDF5/2.0.0/lib
> -lhdf5 -lz
> /usr/bin/ld: cannot find -lz
> collect2: error: ld returned 1 exit status
> make: *** [Makefile:384: flash4] Error 1
>
> I'm wondering what the -lz does (can't find it through googling) and if
> there is another way I can link the HDF5 libraries?
>
> Thanks,
> Adam K.
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