Description of problem: According to http://search.cpan.org/~jesse/perl-5.12.0/pod/perl5120delta.pod, Perl 5.12 (and later) should be Y2K38 compatible. However POSIX::mktime() for 2040 is still returning undef. I am wondering about "Sizeof time_t = 4" in the build log for i686 as well, shouldn't that be 8 when using -Duse64bitint and/ or -Duselongdouble? Or am I on the wrong path? Version-Release number of selected component (if applicable): perl-5.16.3-244.fc18 How reproducible: Run the following on a 32 bit system: perl -e 'use POSIX; print mktime(0, 0, 0, 1, 0, 140, 0, 0) . "\n"' Actual results: Perl mktime() still not Y2K38 compatible (even it should be)? Expected results: 2208985200 :)
Isn't time_t always 32-bit on 32-bit x86 architecture? This is what you get from kernel and glibc. The -Duse64bitint is just to define perl's internal integer type to occupy 64-bits (i.e. typedef IV long). See config.h and perl.h: #if defined(USE_64_BIT_INT) && defined(HAS_QUAD) # if QUADKIND == QUAD_IS_INT64_T && defined(INT64_MAX) # define IV_MAX INT64_MAX [...] # else # define IV_MAX PERL_QUAD_MAX [...] # endif # define IV_IS_QUAD # define UV_IS_QUAD #else # if defined(INT32_MAX) && IVSIZE == 4 # define IV_MAX INT32_MAX [...] # else # define IV_MAX PERL_LONG_MAX [...] # endif #endif
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