libxmu-dev - 2:1.1.3-3 main

libXmu provides a set of miscellaneous utility convenience functions for X
libraries to use. libXmuu is a lighter-weight version that does not depend
on libXt or libXext; for more information, see libxmuu1.
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This package contains the development headers for the library found in
libxmu6. Non-developers likely have little use for this package.
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More information about X.Org can be found at:

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This module can be found at
git://anongit.freedesktop.org/git/xorg/lib/libXmu