I've tried to build perl 5.30 with visual studio 2019. It can be compiled successfully but some tests failed when running nmake test:

../ext/POSIX/t/time.t .............................................. 1
+/19
#   Failed test 'strftime() can handle unicode chars in the format str
+ing'
#   at t/time.t line 65.
Wide character in print at ../../lib/Test2/Formatter/TAP.pm line 124.
#          got: '1970�?m�?d�?'
#     expected: '1970年01月16日'

#   Failed test 'strftime() can handle unicode chars in the format str
+ing'
#   at t/time.t line 68.
Wide character in print at ../../lib/Test2/Formatter/TAP.pm line 124.
#          got: '1970�?m�?d�?'
#     expected: '1970年01月16日'

#   Failed test 'Format string has correct character'
#   at t/time.t line 74.
#          got: '63'
#     expected: '223'

#   Failed test 'Format string has correct character'
#   at t/time.t line 76.
#          got: '63'
#     expected: '223'
# Looks like you failed 4 tests of 19.
....
....
../lib/locale.t .................................................... 1
+/? Use of uninitialized value $Config{"d_has_C_UTF8"} in string eq at
+ ./loc_tools.pl line 343.
Use of uninitialized value $Config{"d_has_C_UTF8"} in string eq at ./l
+oc_tools.pl line 343, <DATA> line 47.
....
....

Test Summary Report
-------------------
op/magic.t                                                       (Wsta
+t: 0 Tests: 195 Failed: 2)
  Failed tests:  178, 181
uni/gv.t                                                         (Wsta
+t: 0 Tests: 206 Failed: 1)
  Failed test:  78
../ext/IPC-Open3/t/IPC-Open3.t                                   (Wsta
+t: 0 Tests: 45 Failed: 0)
  TODO passed:   25
../ext/POSIX/t/time.t                                            (Wsta
+t: 1024 Tests: 19 Failed: 4)
  Failed tests:  9-10, 12-13
  Non-zero exit status: 4
Files=2661, Tests=1149180, 1837 wallclock secs (98.95 usr +  7.03 sys 
+= 105.98 CPU)
Result: FAIL
NMAKE : fatal error U1077: '.\perl.exe' : return code '0x7'
Stop.
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OS Name    Microsoft Windows Server 2016 Standard
Version    10.0.14393 Build 14393
System Name    WIN-4P02OPRJS9H
System Type    x64-based PC

perl -V:
C:\perl\perl-5.30.0>perl.exe -V
Summary of my perl5 (revision 5 version 30 subversion 0) configuration
+:

  Platform:
    osname=MSWin32
    osvers=10.0.14393
    archname=MSWin32-x64-multi-thread
    uname=''
    config_args='undef'
    hint=recommended
    useposix=true
    d_sigaction=undef
    useithreads=define
    usemultiplicity=define
    use64bitint=define
    use64bitall=undef
    uselongdouble=undef
    usemymalloc=n
    default_inc_excludes_dot=define
    bincompat5005=undef
  Compiler:
    cc='cl'
    ccflags ='-nologo -GF -W3 -O1 -MD -Zi -DNDEBUG -GL -fp:precise -DW
+IN32 -D_CONSOLE -DNO_STRICT -DWIN64 -DCONSERVATIVE -D_CRT_SECURE_NO_D
+EPRECATE -D_CRT_NONSTDC_NO_DEPRECATE -D_WINSOCK_DEPRECATED_NO_WARNING
+S  -DPERL_TEXTMODE_SCRIPTS -DPERL_IMPLICIT_CONTEXT -DPERL_IMPLICIT_SY
+S'
    optimize='-O1 -MD -Zi -DNDEBUG -GL -fp:precise'
    cppflags='-DWIN32'
    ccversion='19.23.28106.4'
    gccversion=''
    gccosandvers=''
    intsize=4
    longsize=4
    ptrsize=8
    doublesize=8
    byteorder=12345678
    doublekind=3
    d_longlong=undef
    longlongsize=8
    d_longdbl=define
    longdblsize=8
    longdblkind=0
    ivtype='__int64'
    ivsize=8
    nvtype='double'
    nvsize=8
    Off_t='__int64'
    lseeksize=8
    alignbytes=8
    prototype=define
  Linker and Libraries:
    ld='link'
    ldflags ='-nologo -nodefaultlib -debug -opt:ref,icf -ltcg  -libpat
+h:"c:\perl\visperl\lib\CORE"  -machine:AMD64 -subsystem:console,"5.02
+"'
    libpth="C:\Program Files (x86)\Microsoft Visual Studio\2019\Commun
+ity\VC\Tools\MSVC\14.23.28105\\lib\x64"
    libs=oldnames.lib kernel32.lib user32.lib gdi32.lib winspool.lib  
+comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib  netapi3
+2.lib uuid.lib ws2_32.lib mpr.lib winmm.lib  version.lib odbc32.lib o
+dbccp32.lib comctl32.lib msvcrt.lib vcruntime.lib ucrt.lib
    perllibs=oldnames.lib kernel32.lib user32.lib gdi32.lib winspool.l
+ib  comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib  net
+api32.lib uuid.lib ws2_32.lib mpr.lib winmm.lib  version.lib odbc32.l
+ib odbccp32.lib comctl32.lib msvcrt.lib vcruntime.lib ucrt.lib
    libc=ucrt.lib
    so=dll
    useshrplib=true
    libperl=perl530.lib
    gnulibc_version=''
  Dynamic Linking:
    dlsrc=dl_win32.xs
    dlext=dll
    d_dlsymun=undef
    ccdlflags=' '
    cccdlflags=' '
    lddlflags='-dll -nologo -nodefaultlib -debug -opt:ref,icf -ltcg  -
+libpath:"c:\perl\visperl\lib\CORE"  -machine:AMD64 -subsystem:console
+,"5.02"'


Characteristics of this binary (from libperl):
  Compile-time options:
    HAS_TIMES
    HAVE_INTERP_INTERN
    MULTIPLICITY
    PERLIO_LAYERS
    PERL_COPY_ON_WRITE
    PERL_DONT_CREATE_GVSV
    PERL_IMPLICIT_CONTEXT
    PERL_IMPLICIT_SYS
    PERL_MALLOC_WRAP
    PERL_OP_PARENT
    PERL_PRESERVE_IVUV
    USE_64_BIT_INT
    USE_ITHREADS
    USE_LARGE_FILES
    USE_LOCALE
    USE_LOCALE_COLLATE
    USE_LOCALE_CTYPE
    USE_LOCALE_NUMERIC
    USE_LOCALE_TIME
    USE_PERLIO
    USE_PERL_ATOF
    USE_THREAD_SAFE_LOCALE
  Built under MSWin32
  Compiled at Nov 26 2019 16:41:19
  @INC:
    C:/perl/perl-5.30.0/lib
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