jpackage Are the RPM Requires necessary?

[Sverre Moe]

Running jpackage to build an RPM will add some Requires to the package.

It comes from the Template file:
https://github.com/openjdk/jdk/blob/jdk-14%2B36/src/jdk.incubator.jpackage/linux/classes/jdk/incubator/jpackage/internal/resources/template.spec

Autoprov: 0
Autoreq: 0
%if "xPACKAGE_DEFAULT_DEPENDENCIES" != x || "xPACKAGE_CUSTOM_DEPENDENCIES"
!= x
Requires: PACKAGE_DEFAULT_DEPENDENCIES PACKAGE_CUSTOM_DEPENDENCIES
%endif

Building on OpenSUSE will give us these Requires:
+%if "xglibc, libX11-6, libXau6, libXext6, libXi6, libXrender1, libXtst6,
libasound2, libxcb1, libz1" != x || "x" != x
+Requires: glibc, libX11-6, libXau6, libXext6, libXi6, libXrender1,
libXtst6, libasound2, libxcb1, libz1
+%endif
+
+#avoid ARCH subfolder

We override the RPM spec file with resource directory. I copied the RPM
spec file content from the one jpackage generated and added something extra
to it.

Unfortunately this RPM will not install on Fedora, but installs fine on
OpenSUSE where I built it.

Installing on Fedora will spew out this line for all these Requires.
nothing provides libX11-6

Are these Requires needed by Java? What is the consequences if these are
not available on the system installing the RPM?
It is an JavaFX application we are packaging.

/Sverre