c++ -DNO_MATHOMS -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -Wall -Werror=pointer-arith -Werror=vla -Wextra -Wno-long-long -Wno-declaration-after-statement -Wc++-compat -Wwrite-strings -O2   -DVERSION=\"2.204\" -DXS_VERSION=\"2.204\" -fPIC "-I../.."  -DBZ_NO_STDIO  compress.c
compress.c:190:13: error: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
            register UChar  rtmp;
            ^~~~~~~~~

In file included from globals.c:25:
In file included from ./perl.h:6191:
./opcode.h:1004:2: warning: array designators are a C99 extension [-Wc99-designator]
        [OP_NULL]               = Perl_pp_null,
        ^~~~~~~~~

# requires clang-16, installed here from the llvm deb archive
./Configure -des -Dusedevel -Dcc=clang++-16 -Accflags='-g -fno-omit-frame-pointer -fsanitize=address -fno-common -x c++' -Aldflags=-fsanitize=address -Accflags=-DNO_MATHOMS && make

clang++-16 -c  -I./zlib-src -g -fno-omit-frame-pointer -fsanitize=address -fno-common -x c++ -std=c++11 -DNO_MATHOMS -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -Wall -Werror=pointer-arith -Werror=vla -Wextra -Wno-long-long -Wno-declaration-after-statement -Wc++-compat -Wwrite-strings -O2   -DVERSION=\"2.204\" -DXS_VERSION=\"2.204\" -fPIC "-I../.."  -DNO_VIZ -DZ_SOLO   -DZ_PREFIX  -DGZIP_OS_CODE=3  -DPerl_crz_BUILD_ZLIB=1 deflate.c
deflate.c:1282:5: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
    register Bytef *scan = s->window + s->strstart; /* current string */
    ^~~~~~~~~

# from miniperl
Summary of my perl5 (revision 5 version 37 subversion 12) configuration:
  Commit id: 6bbe21a508a82ef4a3849bd69a435b3cf8d5bf40
  Platform:
    osname=linux
    osvers=5.10.0-21-amd64
    archname=x86_64-linux
    uname='linux venus 5.10.0-21-amd64 #1 smp debian 5.10.162-1 (2023-01-21) x86_64 gnulinux '
    config_args='-des -Dusedevel -Dcc=clang++-16 -Accflags=-g -fno-omit-frame-pointer -fsanitize=address -fno-common -x c++ -Aldflags=-fsanitize=address -Accflags=-DNO_MATHOMS'
    hint=recommended
    useposix=true
    d_sigaction=define
    useithreads=undef
    usemultiplicity=undef
    use64bitint=define
    use64bitall=define
    uselongdouble=undef
    usemymalloc=n
    default_inc_excludes_dot=define
  Compiler:
    cc='clang++-16'
    ccflags ='-g -fno-omit-frame-pointer -fsanitize=address -fno-common -x c++ -DNO_MATHOMS -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64'
    optimize='-O2'
    cppflags='-g -fno-omit-frame-pointer -fsanitize=address -fno-common -x c++ -DNO_MATHOMS -I/usr/local/include'
    ccversion=''
    gccversion='Debian Clang 16.0.3 (++20230502062952+da3cd333bea5-1~exp1~20230502183046.82)'
    gccosandvers=''
    intsize=4
    longsize=8
    ptrsize=8
    doublesize=8
    byteorder=12345678
    doublekind=3
    d_longlong=define
    longlongsize=8
    d_longdbl=define
    longdblsize=16
    longdblkind=3
    ivtype='long'
    ivsize=8
    nvtype='double'
    nvsize=8
    Off_t='off_t'
    lseeksize=8
    alignbytes=8
    prototype=define
  Linker and Libraries:
    ld='clang++-16'
    ldflags =' -fsanitize=address -L/usr/local/lib'
    libpth=/usr/lib/llvm-16/lib/clang/16/lib /usr/local/lib /usr/lib/x86_64-linux-gnu /usr/lib /usr/lib64
    libs=-lpthread -lgdbm -ldl -lm -lcrypt -lutil -lc -lgdbm_compat
    perllibs=-lpthread -ldl -lm -lcrypt -lutil -lc
    libc=libc-2.31.so
    so=so
    useshrplib=false
    libperl=libperl.a
    gnulibc_version='2.31'
  Dynamic Linking:
    dlsrc=dl_dlopen.xs
    dlext=so
    d_dlsymun=undef
    ccdlflags='-Wl,-E'
    cccdlflags='-fPIC'
    lddlflags='-shared -O2 -L/usr/local/lib'
Characteristics of this binary (from libperl): 
  Compile-time options:
    HAS_LONG_DOUBLE
    HAS_STRTOLD
    HAS_TIMES
    NO_MATHOMS
    PERLIO_LAYERS
    PERL_COPY_ON_WRITE
    PERL_DONT_CREATE_GVSV
    PERL_EXTERNAL_GLOB
    PERL_HASH_FUNC_SIPHASH13
    PERL_HASH_USE_SBOX32
    PERL_IS_MINIPERL
    PERL_MALLOC_WRAP
    PERL_OP_PARENT
    PERL_PRESERVE_IVUV
    PERL_USE_DEVEL
    PERL_USE_SAFE_PUTENV
    USE_64_BIT_ALL
    USE_64_BIT_INT
    USE_LARGE_FILES
    USE_LOCALE
    USE_LOCALE_COLLATE
    USE_LOCALE_CTYPE
    USE_LOCALE_NUMERIC
    USE_LOCALE_TIME
    USE_PERLIO
    USE_PERL_ATOF
    USE_SITECUSTOMIZE
  Built under linux
  Compiled at May  4 2023 10:48:51
  %ENV:
    PERLBREW_BASHRC_VERSION="0.43"
    PERLBREW_HOME="/home/tony/.perlbrew"
    PERLBREW_MANPATH=""
    PERLBREW_PATH="/home/tony/perl5/perlbrew/bin"
    PERLBREW_ROOT="/home/tony/perl5/perlbrew"
    PERLBREW_VERSION="0.67"
  @INC:
    /home/tony/dev/perl/git/perl6/cpan/AutoLoader/lib
    /home/tony/dev/perl/git/perl6/dist/Carp/lib
    /home/tony/dev/perl/git/perl6/dist/PathTools
    /home/tony/dev/perl/git/perl6/dist/PathTools/lib
    /home/tony/dev/perl/git/perl6/cpan/ExtUtils-Install/lib
    /home/tony/dev/perl/git/perl6/cpan/ExtUtils-MakeMaker/lib
    /home/tony/dev/perl/git/perl6/cpan/ExtUtils-Manifest/lib
    /home/tony/dev/perl/git/perl6/cpan/File-Path/lib
    /home/tony/dev/perl/git/perl6/ext/re
    /home/tony/dev/perl/git/perl6/dist/Term-ReadLine/lib
    /home/tony/dev/perl/git/perl6/dist/Exporter/lib
    /home/tony/dev/perl/git/perl6/ext/File-Find/lib
    /home/tony/dev/perl/git/perl6/cpan/Text-Tabs/lib
    /home/tony/dev/perl/git/perl6/dist/constant/lib
    /home/tony/dev/perl/git/perl6/cpan/version/lib
    /home/tony/dev/perl/git/perl6/cpan/Getopt-Long/lib
    /home/tony/dev/perl/git/perl6/cpan/Text-ParseWords/lib
    /home/tony/dev/perl/git/perl6/cpan/ExtUtils-PL2Bat/lib
    /home/tony/dev/perl/git/perl6/lib