Don't define ruby_qsort when POSIX qsort_r is available.

[delphij]

The current code would define ruby_qsort as a wrapper of qsort_s when it is available. When both qsort_s and POSIX (GNU) qsort_r are available, we should call qsort_r directly instead, and the qsort_s wrapper is redundant.

This fixes ruby build on FreeBSD with qsort_r interface modified to match POSIX one (more information at https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=266227 and http://gohan05.nyi.freebsd.org/data/mainamd64PR266227-default/2022-09-06_09h13m56s/logs/errors/ruby32-3.2.0.p1_2,1.log ).

[nobu]

I can't that log because the server is not found.

Anyway, since this seems to need backports to earlier versions, please file a ticket at https://bugs.ruby-lang.org/issues/new.

[delphij]

https://bugs.ruby-lang.org/issues/18997

The logs are only accessible over IPv6. I will paste part of it here in a follow up comment.

[delphij]

Log snippet:

compiling transcode.c
compiling transient_heap.c
compiling util.c
util.c:255:1: error: expected identifier or '('
ruby_qsort(void* base, const size_t nel, const size_t size, cmpfunc_t *cmp, void *d)
^
./include/ruby/util.h:124:21: note: expanded from macro 'ruby_qsort'
# define ruby_qsort qsort_r
                    ^
/usr/include/stdlib.h:344:5: note: expanded from macro 'qsort_r'
    __generic(arg, int (*)(void *, const void *, const void *),         \
    ^
/usr/include/sys/cdefs.h:320:2: note: expanded from macro '__generic'
        _Generic(expr, t: yes, default: no)
        ^
1 error generated.
*** Error code 1