branches: 1.1.1.1.2;
import MPC 1.1.0. from their NEWS:

Changes in version 1.1.0:
- Minimally required library versions: GMP 5.0.0 and MPFR 3.0.0
- Fixed issues with MPFR 4.0.0
- New functions: mpc_cmp_abs, mpc_rootofunity
- Improved speed for corner cases of mpc_asin, mpc_sin, see
http://lists.gforge.inria.fr/pipermail/mpc-discuss/2013-December/001266.html
- Rewrite of the testing framework
- New mpcbench tool, used with "make bench"
- Fixed handling of over- and underflows with directed rounding in the
"other direction" for mpc_cos, mpc_sin, mpc_exp and mpc_pow, see
http://lists.gforge.inria.fr/pipermail/mpc-discuss/2015-March/001336.html
- Fixed a bug in mpc_atan(0,y) with |y| near 1, see
http://lists.gforge.inria.fr/pipermail/mpc-discuss/2017-March/001404.html