License trouble
The Fedora project is converting our homegrown system of license tags over to SPDX license tags (see https://spdx.org/licenses/). As part of this effort, we are reviewing license texts. The license for sympow is almost the same as BSD-2-Clause, but contains a problematic clause:
* If redistribution is done as a part of a compilation that has a more
restrictive license (such as the GPL), then the fact that SYMPOW has
a less restrictive license must be made clear to the recipient.
For example, a line like (include bracketed text if SYMPOW is modified):
"This compilation includes [a modification of] SYMPOW whose [original]
code has a less-restrictive license than the entire compilation."
should appear in a suitable place in the COPYING and/or LICENSE file.
The sympow distribution itself contains a GPL-licensed file, fpu.c, which the comments indicate has a license of GPL-2.0-or-later. According to the license term quoted above, it is necessary for everyone who builds sympow to inform all users that sympow has a less restrictive license than sympow.
Is there any way you could jettison that clause and go with straight BSD-2-Clause? Also, note that the COPYING file is incorrect. Due to the inclusion of fpu.c in the build, sympow cannot be distributed under the terms in that file, but must be distributed under license terms that imply both those terms and those of GPL-2.0-or-later.