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Hello Adam,
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<div>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.<br>
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Thanks,</div>
<div>Baowei Liu<br>
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<div>On Nov 20, 2025, at 3:13 PM, Adam F Kowalski <Adam.F.Kowalski@Colorado.EDU> wrote:</div>
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Dear Flash users,</div>
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When I make Flash on a new machine, I get the following error:</div>
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...</div>
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owalski/myhdf5stuff/build/ci-StdShar-GNUC/HDF5-2.0.0-Linux/HDF_Group/HDF5/2.0.0/lib -lhdf5 -lz </div>
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/usr/bin/ld: cannot find -lz</div>
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collect2: error: ld returned 1 exit status</div>
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make: *** [Makefile:384: flash4] Error 1</div>
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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?</div>
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Thanks,</div>
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Adam K.</div>
<span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;">_______________________________________________</span><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;">
<span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;">flash-users
mailing list</span><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;">
<a href="mailto:flash-users@flash.rochester.edu" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;">flash-users@flash.rochester.edu</a><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;">
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<span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;">For
list info, including unsubscribe:</span><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;">
<a href="https://flash.rochester.edu/mailman/listinfo/flash-users" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;">https://flash.rochester.edu/mailman/listinfo/flash-users</a></div>
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