POSIX: MSVC defines all of these #439

Job	Run time
Sanity: Linux -Dusethreads	14m 38s
involved_authors_debug	0s
cygwin	33m 30s
Test dist/ modules on MacOS system perl	5m 18s
dist-modules (latest)	3m 13s
ASAN (-Accflags=-DPURIFY)	32m 35s
dist-modules (5.24)	3m 50s
install	12m 51s
ASAN (-DDEBUGGING)	23m 4s
dist-modules (5.10)	2m 24s
linux (-Uusethreads)	11m 13s
ASAN (-Dusethreads)	34m 1s
dist-modules (5.8)	2m 32s
linux (-Duseshrplib -Dusequadmath -Dusecbacktrace -Dusethreads)	14m 0s
linux i386/ubuntu (-Dusedevel)	18m 14s
linux (-Duserelocatableinc)	13m 14s
Windows mingw64	50m 56s
linux (-Dcc='clang')	15m 33s
minitest	4m 19s
linux (-Dcc='g++')	14m 38s
PERL_UNICODE (-Uusethreads)	11m 57s
PERL_UNICODE (-Dusethreads -Accflags=-DPURIFY -Dcc='gcc -fsanitize=address' -Dld='gcc -fsanitize=...	30m 12s
linux (-Accflags=-DSILENT_NO_TAINT_SUPPORT)	13m 52s
macOS (big sur) xcode 13 (-Uusethreads)	14m 46s
linux (-Accflags=-DNO_TAINT_SUPPORT)	11m 24s
Windows msvc142	1h 31m 28s
macOS (big sur) xcode 13 (-Duseithreads -Duseshrplib)	16m 26s
linux (-DDEBUGGING -Accflags=-DPERL_RC_STACK)	13m 56s
	8h 34m 4s

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