# Martijn Koster <m.koster@webcrawler.com>
# Richard Yeh <rcyeh@cco.caltech.edu>
#
+# Deny system's false claims to support mmap() and munmap(); note
+# also that Sys V IPC (re)disabled by jhi due to continuing inadequacy
+# -- Dominic Dunlop <domo@computer.org> 001111
# Remove dynamic loading libraries from search; enable SysV IPC with
# MachTen 4.1.4 and above; define SYSTEM_ALIGN_BYTES for old MT versions
# -- Dominic Dunlop <domo@computer.org> 000224
#
# MachTen 4.1.1's support for shadow password file access is incomplete:
# disable its use completely.
-d_endspent=${d_endspent:-undef}
-d_getspent=${d_getspent:-undef}
d_getspnam=${d_getspnam:-undef}
-d_setspent=${d_setspent:-undef}
# MachTen 4.1.1 does support dynamic loading, but perl doesn't
# know how to use it yet.
d_shm=${d_shm:-undef}
fi
+
+# As of MachTen 4.1.4 the msg* and shm* are in libc but unimplemented
+# (an attempt to use them causes a runtime error)
+# XXX Configure probe for really functional msg*() is needed XXX
+# XXX Configure probe for really functional shm*() is needed XXX
+if test "$d_msg" = ""; then
+ d_msgget=${d_msgget:-undef}
+ d_msgctl=${d_msgctl:-undef}
+ d_msgsnd=${d_msgsnd:-undef}
+ d_msgrcv=${d_msgrcv:-undef}
+ case "$d_msgget$d_msgsnd$d_msgctl$d_msgrcv" in
+ *"undef"*) d_msg="$undef" ;;
+ esac
+fi
+if test "$d_shm" = ""; then
+ d_shmat=${d_shmat:-undef}
+ d_shmdt=${d_shmdt:-undef}
+ d_shmget=${d_shmget:-undef}
+ d_shmctl=${d_shmctl:-undef}
+ case "$d_shmat$d_shmctl$d_shmdt$d_shmget" in
+ *"undef"*) d_shm="$undef" ;;
+ esac
+fi
+
+# MachTen has stubs for mmap and munmap(), but they just result in the
+# caller being killed on the grounds of "Bad system call"
+d_mmap=${d_mmap:-undef}
+d_munmap=${d_munmap:-undef}
+
# Get rid of some extra libs which it takes Configure a tediously
# long time never to find on MachTen, or which break perl
set `echo X "$libswanted "|sed -e 's/ net / /' -e 's/ socket / /' \
as well as similar messages concerning \$d_sem and \$d_shm. Select the
default answers: MachTen 4.1 appears to provide System V IPC support,
but it is incomplete and buggy: perl should be built without it.
+Similar considerations apply to memory mapping of files, controlled
+by \$d_mmap and \$d_munmap.
Similarly, when you see
select the default answer: vfork() works, and avoids expensive data
copying.
-You may also see "WHOA THERE!!!" messages concerning \$d_endspent,
-\$d_getspent, \$d_getspnam and \$d_setspent. In all cases, select the
-default answer: MachTen's support for shadow password file access is
-incomplete, and should not be used.
+You may also see "WHOA THERE!!!" messages concerning \$d_getspnam.
+Select the default answer: MachTen's support for shadow password
+file access is incomplete, and should not be used.
At the end of Configure, you will see a harmless message