Add functions thread-unsafe in Ubuntu 26.04 #19889

Job	Run time
build_make (ubuntu:24.04)	2m 43s
build_cmake (ubuntu:24.04, true, true)	2m 35s
build_make (alpine:3.23)	5m 55s
build_cmake (alpine:3.23, false, false)	4m 17s
build_make (ubuntu:25.10)	3m 32s
build_cmake (ubuntu:25.10, true, true)	2m 45s
	21m 47s

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