I will try later to build perl & DateTime outside of Ports, but does not look like that would help any given the evidence so far.
It's not exactly the same as what you are doing, but I've just built this -DDEBUGGING perl-5.34.0 on my FreeBSD-12.0 system:
$ perl -V
Summary of my perl5 (revision 5 version 34 subversion 0) configuration
+:
Platform:
osname=freebsd
osvers=12.0-release
archname=amd64-freebsd
uname='freebsd sisbsd.home 12.0-release freebsd 12.0-release r3416
+66 generic amd64 '
config_args='-des -Duse64bitall -Dprefix=/home/sisyphus/perl-5.34.
+0-d-DEBUG -DDEBUGGING'
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='cc'
ccflags ='-DHAS_FPSETMASK -DHAS_FLOATINGPOINT_H -DDEBUGGING -fno-s
+trict-aliasing -pipe -fstack-protector-strong -I/usr/local/include -D
+_FORTIFY_SOURCE=2'
optimize='-O2 -g'
cppflags='-DHAS_FPSETMASK -DHAS_FLOATINGPOINT_H -DDEBUGGING -fno-s
+trict-aliasing -pipe -fstack-protector-strong -I/usr/local/include'
ccversion=''
gccversion='4.2.1 Compatible FreeBSD Clang 6.0.1 (tags/RELEASE_601
+/final 335540)'
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='cc'
ldflags ='-Wl,-E -fstack-protector-strong -L/usr/local/lib'
libpth=/usr/lib /usr/local/lib /usr/lib/clang/6.0.1/lib
libs=-lpthread -lgdbm -ldl -lm -lcrypt -lutil -lc
perllibs=-lpthread -ldl -lm -lcrypt -lutil -lc
libc=
so=so
useshrplib=false
libperl=libperl.a
gnulibc_version=''
Dynamic Linking:
dlsrc=dl_dlopen.xs
dlext=so
d_dlsymun=undef
ccdlflags=' '
cccdlflags='-DPIC -fPIC'
lddlflags='-shared -L/usr/local/lib -fstack-protector-strong'
Characteristics of this binary (from libperl):
Compile-time options:
DEBUGGING
HAS_TIMES
PERLIO_LAYERS
PERL_COPY_ON_WRITE
PERL_DONT_CREATE_GVSV
PERL_MALLOC_WRAP
PERL_OP_PARENT
PERL_PRESERVE_IVUV
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
Built under freebsd
Compiled at Jul 26 2021 10:50:16
@INC:
/home/sisyphus/perl-5.34.0-d-DEBUG/lib/site_perl/5.34.0/amd64-free
+bsd
/home/sisyphus/perl-5.34.0-d-DEBUG/lib/site_perl/5.34.0
/home/sisyphus/perl-5.34.0-d-DEBUG/lib/5.34.0/amd64-freebsd
/home/sisyphus/perl-5.34.0-d-DEBUG/lib/5.34.0
The Configure args that I specified (
config_args) are as shown in that output.
Having tested and installed that perl, I prepended its location to $PATH and ran
cpan -i DateTime
That ran successfully, and I can find no problem in running DateTime-1.54:
$ perl -MDateTime -wle 'print $DateTime::VERSION;'
1.54
Cheers,
Rob