mem_sec.c: relax POSIX requirement.
Even though mlock(2) was standardized in POSIX.1-2001, vendors did
implement it prior that point.
/* e_os.h includes unistd.h, which defines _POSIX_VERSION */
#if !defined(OPENSSL_NO_SECURE_MEMORY) && defined(OPENSSL_SYS_UNIX) \
- && defined(_POSIX_VERSION) && _POSIX_VERSION >= 200112L
+ && ( (defined(_POSIX_VERSION) && _POSIX_VERSION >= 200112L) \
+ || defined(__sun) || defined(__hpux) || defined(__sgi) \
+ || defined(__osf__) )
# define IMPLEMENTED
# include <stdlib.h>
# include <assert.h>
