# machten.sh
-# This is for MachTen 4.0.3. It might work on other versions too.
+# This is for MachTen 4.0.3. It might work on other versions and variants too.
#
-# MachTen users might need a fixed tr from ftp.tenon.com. This should
-# be described in the MachTen release notes.
+# Users of earlier MachTen versions might need a fixed tr from ftp.tenon.com.
+# This should be described in the MachTen release notes.
#
# MachTen 2.x has its own hint file.
#
# Martijn Koster <m.koster@webcrawler.com>
# Richard Yeh <rcyeh@cco.caltech.edu>
#
+# For now, explicitly disable dynamic loading -- MT 4.1.1 has it,
+# but these hints do not yet support it.
+# Define NOTEDEF_MACHTEN to undo gratuitous Tenon hack to signal.h.
+# -- Dominic Dunlop <domo@computer.org> 9800802
+# Completely disable SysV IPC pending more complete support from Tenon
+# -- Dominic Dunlop <domo@computer.org> 980712
+# Use vfork and perl's malloc by default
+# -- Dominic Dunlop <domo@computer.org> 980630
+# Raise perl's stack size again; cut down reg_infty; document
+# -- Dominic Dunlop <domo@computer.org> 980619
+# Use of semctl() can crash system: disable -- Dominic Dunlop 980506
+# Raise stack size further; slight tweaks to accomodate MT 4.1
+# -- Dominic Dunlop <domo@computer.org> 980211
+# Raise perl's stack size -- Dominic Dunlop <domo@tcp.ip.lu> 970922
# Reinstate sigsetjmp iff version is 4.0.3 or greater; use nm
# (assumes Configure change); prune libswanted -- Dominic Dunlop 970113
# Warn about test failure due to old Berkeley db -- Dominic Dunlop 970105
#
# Comments, questions, and improvements welcome!
#
-# MachTen 4.X does support dynamic loading, but perl doesn't
+# MachTen 4.1.1 does support dynamic loading, but perl doesn't
# know how to use it yet.
-#
-# Updated by Dominic Dunlop <domo@tcp.ip.lu>
-# Tue Jan 14 10:17:18 WET 1997
+usedl=${usedl:-undef}
+
+# MachTen 4.1.1 may have an unhelpful hack in /usr/include/signal.h.
+# Undo it if so.
+if grep NOTDEF_MACHTEN /usr/include/signal.h > /dev/null
+then
+ ccflags="$ccflags -DNOTDEF_MACHTEN"
+fi
# Power MachTen is a real memory system and its standard malloc
# has been optimized for this. Using this malloc instead of Perl's
-# malloc may result in significant memory savings.
-usemymalloc='false'
+# malloc may result in significant memory savings. In particular,
+# unlike most UNIX memory allocation subsystems, MachTen's free()
+# really does return unneeded process data memory to the system.
+# However, MachTen's malloc() is woefully slow -- maybe 100 times
+# slower than perl's own, so perl's own is usually the better
+# choice. In order to use perl's malloc(), the sbrk() system call
+# must be simulated using MachTen's malloc(). See malloc.c for
+# precise details of how this is achieved. Recent improvements
+# to perl's malloc() currently crash MachTen, and so are disabled
+# by -DPLAIN_MALLOC and -DNO_FANCY_MALLOC.
+usemymalloc=${usemymalloc:-y}
+
+# Do not wrap the following long line
+malloc_cflags='ccflags="$ccflags -DPLAIN_MALLOC -DNO_FANCY_MALLOC -DUSE_PERL_SBRK"'
+
+# Note that an empty malloc_cflags appears in config.sh if perl's
+# malloc() is not used. his is harmless.
+case "$usemymalloc" in
+n) unset malloc_cflags;;
+*) ccflags="$ccflags -DHIDEMYMALLOC"
+esac
+
+# When MachTen does a fork(), it immediately copies the whole of
+# the parent process' data space for the child. This can be
+# expensive. Using vfork() where appropriate avoids this cost.
+d_vfork=${d_vfork:-define}
+
+# Specify a high level of optimization (-O3 wouldn't do much more)
+optimize=${optimize:--O2 -fomit-frame-pointer}
# Make symbol table listings les voluminous
nmopts=-gp
+# Set reg_infty -- the maximum allowable number of repeats in regular
+# expressions such as /a{1,$max_repeats}/, and the maximum number of
+# times /a*/ will match. Setting this too high without having a stack
+# large enough to accommodate deep recursion in the regular expression
+# engine allows perl to crash your Mac due to stack overrun if it
+# encounters a pathological regular expression. The default is a
+# compromise between capability and required stack size (see below).
+# You may override the default value from the Configure command-line
+# like this:
+#
+# Configure -Dreg_infty=16368 ...
+
+reg_infty=${reg_infty:-2047}
+
+# If you want to have many perl processes active simultaneously --
+# processing CGI forms -- for example, you should opt for a small stack.
+# For safety, you should set reg_infty no larger than the corresponding
+# value given in this table:
+#
+# Stack size reg_infty value supported
+# ---------- -------------------------
+# 128k 2**8-1 (256)
+# 256k 2**9-1 (511)
+# 512k 2**10-1 (1023)
+# 1M 2**11-1 (2047)
+# ...
+# 16M 2**15-1 (32767) (perl's default value)
+
+# This script selects a safe stack size based on the value of reg_infty
+# specified above. However, you may choose to take a risk and set
+# stack size lower: pathological regular expressions are rare in real-world
+# programs. But be aware that, if perl does encounter one, it WILL
+# crash your system. Do not set stack size lower than 96k unless
+# you want perl's installation tests ( make test ) to crash your system.
+#
+# You may override the default value from the Configure command-line
+# by specifying the required size in kilobytes like this:
+#
+# Configure -Dstack_size=96
+
+if [ "X$stack_size" = 'X' ]
+then
+ stack_size=128
+ X=`expr $reg_infty / 256`
+
+ while [ $X -gt 0 ]
+ do
+ X=`expr $X / 2`
+ stack_size=`expr $stack_size \* 2`
+ done
+ X=`expr $stack_size \* 1024`
+fi
+
+ldflags="$ldflags -Xlstack=$X"
+ccflags="$ccflags -DREG_INFTY=$reg_infty"
+
# Install in /usr/local by default
prefix='/usr/local'
# friends. Use setjmp and friends instead.
expr "$osvers" \< "4.0.3" > /dev/null && d_sigsetjmp='undef'
+# System V IPC support in MachTen 4.1 is incomplete (missing msg function
+# prototypes, no ftok()), buggy (semctl(.., .., IPC_STATUS, ..) hangs
+# system), and undocumented. Claim it's not there until things improve.
+d_msg=${d_msg:-undef}
+d_sem=${d_sem:-undef}
+d_shm=${d_shm:-undef}
+
# Get rid of some extra libs which it takes Configure a tediously
# long time never to find on MachTen
set `echo X "$libswanted "|sed -e 's/ net / /' -e 's/ socket / /' \
shift
libswanted="$*"
+# While link counts on MachTen 4.1's fast file systems work correctly,
+# on Macintosh Heirarchical File Systems, (and on HFS+)
# MachTen always reports ony two links to directories, even if they
# contain subdirectories. Consequently, we use this variable to stop
# File::Find using the link count to determine whether there are
# Propagating recommended variable dont_use_nlink
dont_use_nlink=define
-cat <<'EOM' >&4
+cat <<EOM >&4
-Tests
- io/fs test 4 and
- op/stat test 3
-may fail since MachTen does not return a useful nlinks field to stat
-on directories.
+During Configure, you may see the message
+
+*** WHOA THERE!!! ***
+ The recommended value for \$d_msg on this machine was "undef"!
+ Keep the recommended value? [y]
+
+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.
+
+Similarly, when you see
+
+*** WHOA THERE!!! ***
+ The recommended value for \$d_vfork on this machine was "define"!
+ Keep the recommended value? [y]
+
+select the default answer: vfork() works, and avoids expensive data
+copying.
At the end of Configure, you will see a harmless message
Hmm...You had some extra variables I don't know about...I'll try to keep 'em.
Propagating recommended variable dont_use_nlink
Propagating recommended variable nmopts
+ Propagating recommended variable malloc_cflags...
+ Propagating recommended variable reg_infty
Read the File::Find documentation for more information about dont_use_nlink
+Your perl will be built with a stack size of ${stack_size}k and a regular
+expression repeat count limit of $reg_infty. If you want alternative
+values, see the file hints/machten.sh for advice on how to change them.
+
+Tests
+ io/fs test 4 and
+ op/stat test 3
+may fail since MachTen may not return a useful nlinks field to stat
+on directories.
+
EOM
-test -r ./broken-db.msg && . ./broken-db.msg
+expr "$osvers" \< "4.1" >/dev/null && test -r ./broken-db.msg && \
+ . ./broken-db.msg
+
+unset stack_size X
projects / p5sagit/p5-mst-13.2.git / blobdiff