Hi,
a new version of libevent bundles a file ax_prog_doxygen.m4 [1]. The license text says the following:
# Copying and distribution of this file, with or without modification, are # permitted in any medium without royalty provided the copyright notice # and this notice are preserved.
Not being a native speaker, I'm not sure how exactly to interpret that sentence, but it sounds to me like there could be a restriction on commercial use.
(What got me additionally confused is that the file is hosted on gnu.org.)
Is this a Free software license or not?
Thank you very much.
[1] http://git.savannah.gnu.org/gitweb/?p=autoconf-archive.git;a=blob_plain;f=m4...
Best regards Ondřej Lysoněk