Fix build in OpenBSD #3861

Job	Run time
macos-static	2m 4s
windows-mingw-build (32)	59s
windows-mingw-build (64)	59s
unix (ubuntu-20.04, g++, make)	5m 31s
windows (32, windows-2019)	6m 0s
unix (ubuntu-20.04, g++, cmake)	5m 27s
windows (32, windows-2022)	4m 44s
unix (ubuntu-20.04, clang++, make)	5m 53s
windows (64, windows-2019)	4m 52s
unix (ubuntu-20.04, clang++, cmake)	5m 55s
windows (64, windows-2022)	4m 15s
unix (ubuntu-22.04, g++, make)	5m 36s
unix (ubuntu-22.04, g++, cmake)	5m 39s
unix (ubuntu-22.04, clang++, make)	3m 58s
unix (ubuntu-22.04, clang++, cmake)	4m 9s
unix (macos-14, clang++, make)	7m 24s
unix (macos-14, clang++, cmake)	6m 0s
windows-mingw-testing (windows-2019, 32)	3m 43s
windows-mingw-testing (windows-2019, 64)	3m 19s
windows-mingw-testing (windows-2022, 32)	4m 57s
windows-mingw-testing (windows-2022, 64)	4m 1s
	1h 35m 25s

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