[perl5.git] / hints / dec_osf.sh

# hints/dec_osf.sh

#	* If you want to debug perl or want to send a
#	stack trace for inclusion into an bug report, call
#	Configure with the additional argument  -Doptimize=-g2
#	or uncomment this assignment to "optimize":
#
#optimize=-g2
#
#	If you want both to optimise and debug with the DEC cc
#	you must have -g3, e.g. "-O4 -g3", and (re)run Configure.
#
#	* gcc can always have both -g and optimisation on.
#
#	* debugging optimised code, no matter what compiler
#	one is using, can be surprising and confusing because of
#	the optimisation tricks like code motion, code removal,
#	loop unrolling, and inlining. The source code and the
#	executable code simply do not agree any more while in
#	mid-execution, the optimiser only cares about the results.
#
#	* Configure will automatically add the often quoted
#	-DDEBUGGING for you if the -g is specified.
#
#	* There is even more optimisation available in the new
#	(GEM) DEC cc: -O5 and -fast. "man cc" will tell more about them.
#	The jury is still out whether either or neither help for Perl
#	and how much. Based on very quick testing, -fast boosts
#	raw data copy by about 5-15% (-fast brings in, among other
#	things, inlined, ahem, fast memcpy()), while on the other
#	hand searching things (index, m//, s///), seems to get slower.
#	Your mileage will vary.
#
#	* The -std is needed because the following compiled
#	without the -std and linked with -lm
#
#	#include <math.h>
#	#include <stdio.h>
#	int main(){short x=10,y=sqrt(x);printf("%d\n",y);}
#
#	will in Digital UNIX 3.* and 4.0b print 0 -- and in Digital
#	UNIX 4.0{,a} dump core: Floating point exception in the printf(),
#	the y has become a signaling NaN.
#
#	* Compilation warnings like:
#
#	"Undefined the ANSI standard macro ..."
#
#	can be ignored, at least while compiling the POSIX extension
#	and especially if using the sfio (the latter is not a standard
#	part of Perl, never mind if it says little to you).
#

# If using the DEC compiler we must find out the DEC compiler style:
# the style changed between Digital UNIX (aka DEC OSF/1) 3 and
# Digital UNIX 4. The old compiler was originally from Ultrix and
# the MIPS company, the new compiler is originally from the VAX world
# and it is called GEM. Many of the options we are going to use depend
# on the compiler style.

cc=${cc:-cc}

# do NOT, I repeat, *NOT* take away the leading tabs
# Configure Black Magic (TM)
	# reset
	_DEC_cc_style=
case "`$cc -v 2>&1 | grep cc`" in
*gcc*)	;; # pass
*)	# compile something small: taint.c is fine for this.
    	# the main point is the '-v' flag of 'cc'.
       	case "`cc -v -I. -c taint.c -o /tmp/taint$$.o 2>&1`" in
	*/gemc_cc*)	# we have the new DEC GEM CC
			_DEC_cc_style=new
			;;
	*)		# we have the old MIPS CC
			_DEC_cc_style=old
			;;
	esac
	# cleanup
	rm -f /tmp/taint$$.o
	;;
esac

# be nauseatingly ANSI
case "`$cc -v 2>&1 | grep gcc`" in
*gcc*)	ccflags="$ccflags -ansi"
	;;
*)	ccflags="$ccflags -std"
	;;
esac

# for gcc the Configure knows about the -fpic:
# position-independent code for dynamic loading

# we want optimisation

case "$optimize" in
'')	case "`$cc -v 2>&1 | grep gcc`" in
	*gcc*)	
		optimize='-O3'				;;
	*)	case "$_DEC_cc_style" in
		new)	optimize='-O4'
			ccflags="$ccflags -fprm d -ieee"
			;;
		old)	optimize='-O2 -Olimit 3200'	;;
	    	esac
		ccflags="$ccflags -D_INTRINSICS"
		;;
	esac
	;;
esac

# Make glibpth agree with the compiler suite.  Note that /shlib
# is not here.  That's on purpose.  Even though that's where libc
# really lives from V4.0 on, the linker (and /sbin/loader) won't
# look there by default.  The sharable /sbin utilities were all
# built with "-Wl,-rpath,/shlib" to get around that.  This makes
# no attempt to figure out the additional location(s) searched by
# gcc, since not all versions of gcc are easily coerced into
# revealing that information.
glibpth="/usr/shlib /usr/ccs/lib /usr/lib/cmplrs/cc"
glibpth="$glibpth /usr/lib /usr/local/lib /var/shlib"

# dlopen() is in libc
libswanted="`echo $libswanted | sed -e 's/ dl / /'`"

# libPW contains nothing useful for perl
libswanted="`echo $libswanted | sed -e 's/ PW / /'`"

# libnet contains nothing useful for perl here, and doesn't work
libswanted="`echo $libswanted | sed -e 's/ net / /'`"

# libbsd contains nothing used by perl that is not already in libc
libswanted="`echo $libswanted | sed -e 's/ bsd / /'`"

# libc need not be separately listed
libswanted="`echo $libswanted | sed -e 's/ c / /'`"

# ndbm is already in libc
libswanted="`echo $libswanted | sed -e 's/ ndbm / /'`"

# the basic lddlflags used always
lddlflags='-shared -expect_unresolved "*"'

# Fancy compiler suites use optimising linker as well as compiler.
# <spider@Orb.Nashua.NH.US>
case "`uname -r`" in
*[123].*)	# old loader
		lddlflags="$lddlflags -O3"
		;;
*)            if $test "X$optimize" = "X$undef"; then
                      lddlflags="$lddlflags -msym"
              else
		  case "`/usr/sbin/sizer -v`" in
		  *4.0D*)
		      # QAR 56761: -O4 + .so may produce broken code,
		      # fixed in 4.0E or better.
		      ;;
		  *)    
                      lddlflags="$lddlflags $optimize"
		      ;;
		  esac
		  # -msym: If using a sufficiently recent /sbin/loader,
		  # keep the module symbols with the modules.
                  lddlflags="$lddlflags -msym -std"
              fi
		;;
esac
# Yes, the above loses if gcc does not use the system linker.
# If that happens, let me know about it. <jhi@iki.fi>


# If debugging or (old systems and doing shared)
# then do not strip the lib, otherwise, strip.
# As noted above the -DDEBUGGING is added automagically by Configure if -g.
case "$optimize" in
	*-g*) ;; # left intentionally blank
*)	case "`uname -r`" in
	*[123].*)
		case "$useshrplib" in
		false|undef|'')	lddlflags="$lddlflags -s"	;;
		esac
		;;
        *) lddlflags="$lddlflags -s"
	        ;;
    	esac
    	;;
esac

#
# Make embedding in things like INN and Apache more memory friendly.
# Keep it overridable on the Configure command line, though, so that
# "-Uuseshrplib" prevents this default.
#

case "$_DEC_cc_style.$useshrplib" in
	new.)	useshrplib="$define"	;;
esac

# The EFF_ONLY_OK from <sys/access.h> is present but dysfunctional for
# [RWX]_OK as of Digital UNIX 4.0[A-D]?.  If and when this gets fixed,
# please adjust this appropriately.  See also pp_sys.c just before the
# emulate_eaccess().

# Fixed in V5.0A.
case "`/usr/sbin/sizer -v`" in
*5.0[A-Z]*|*5.[1-9]*|*[6-9].[0-9]*)
	: ok
	;;
*)
# V5.0 or previous
pp_sys_cflags='ccflags="$ccflags -DNO_EFF_ONLY_OK"'
	;;
esac

# The off_t is already 8 bytes, so we do have largefileness.

cat > UU/usethreads.cbu <<'EOCBU'
# This script UU/usethreads.cbu will get 'called-back' by Configure 
# after it has prompted the user for whether to use threads.
case "$usethreads" in
$define|true|[yY]*)
	# Threads interfaces changed with V4.0.
	case "`$cc -v 2>&1 | grep gcc`" in
	*gcc*)ccflags="-D_REENTRANT $ccflags" ;;
	*)  case "`uname -r`" in
	    *[123].*)	ccflags="-threads $ccflags" ;;
	    *)          ccflags="-pthread $ccflags" ;;
	    esac
	    ;;
	esac    
	case "`uname -r`" in
	*[123].*) libswanted="$libswanted pthreads mach exc c_r" ;;
	*)        libswanted="$libswanted pthread exc" ;;
	esac

	case "$usemymalloc" in
	'')
		usemymalloc='n'
		;;
	esac
	;;
esac
EOCBU

cat > UU/uselongdouble.cbu <<'EOCBU'
# This script UU/uselongdouble.cbu will get 'called-back' by Configure 
# after it has prompted the user for whether to use long doubles.
case "$uselongdouble" in
$define|true|[yY]*) d_Gconvert='sprintf((b),"%.*Lg",(n),(x))' ;;
esac
EOCBU

#
# Unset temporary variables no more needed.
#

unset _DEC_cc_style
    
#
# History:
#
# perl5.005_51:
#
#	September-1998 Jarkko Hietaniemi <jhi@iki.fi>
#
#	* Added the -DNO_EFF_ONLY_OK flag ('use filetest;' support).
#
# perl5.004_57:
#
#	19-Dec-1997 Spider Boardman <spider@Orb.Nashua.NH.US>
#
#	* Newer Digital UNIX compilers enforce signaling for NaN without
#	  -ieee.  Added -fprm d at the same time since it's friendlier for
#	  embedding.
#
#	* Fixed the library search path to match cc, ld, and /sbin/loader.
#
#	* Default to building -Duseshrplib on newer systems.  -Uuseshrplib
#	  still overrides.
#
#	* Fix -pthread additions for useshrplib.  ld has no -pthread option.
#
#
# perl5.004_04:
#
#       19-Sep-1997 Spider Boardman <spider@Orb.Nashua.NH.US>
#
#	* libnet on Digital UNIX is for JAVA, not for sockets.
#
#
# perl5.003_28:
#
#       22-Feb-1997 Jarkko Hietaniemi <jhi@iki.fi>
#
#	* Restructuring Spider's suggestions.
#
#	* Older Digital UNIXes cannot handle -Olimit ... for $lddlflags.
#	
#	* ld -s cannot be used in older Digital UNIXes when doing shared.
#
#
#       21-Feb-1997 Spider Boardman <spider@Orb.Nashua.NH.US>
#
#	* -hidden removed.
#	
#	* -DSTANDARD_C removed.
#
#	* -D_INTRINSICS added. (that -fast does not seem to buy much confirmed)
#
#	* odbm not in libc, only ndbm. Therefore dbm back to $libswanted.
#
#	* -msym for the newer runtime loaders.
#
#	* $optimize also in $lddflags.
#
#
# perl5.003_27:
#
#	18-Feb-1997 Jarkko Hietaniemi <jhi@iki.fi>
#
#	* unset _DEC_cc_style and more commentary on -std.
#
#
# perl5.003_26:
#
#	15-Feb-1997 Jarkko Hietaniemi <jhi@iki.fi>
#
#	* -std and -ansi.
#
#
# perl5.003_24:
#
#	30-Jan-1997 Jarkko Hietaniemi <jhi@iki.fi>
#
#	* Fixing the note on -DDEBUGGING.
#
#	* Note on -O5 -fast.
#
#
# perl5.003_23:
#
#	26-Jan-1997 Jarkko Hietaniemi <jhi@iki.fi>
#
#	* Notes on how to do both optimisation and debugging.
#
#
#	25-Jan-1997 Jarkko Hietaniemi <jhi@iki.fi>
#
#	* Remove unneeded libraries from $libswanted: PW, bsd, c, dbm
#
#	* Restructure the $lddlflags build.
#
#	* $optimize based on which compiler we have.
#
#
# perl5.003_22:
#
#	23-Jan-1997 Achim Bohnet <ach@rosat.mpe-garching.mpg.de>
#
#	* Added comments 'how to create a debugging version of perl'
#
#	* Fixed logic of this script to prevent stripping of shared
#         objects by the loader (see ld man page for -s) is debugging
#         is set via the -g switch.
#
#
#	21-Jan-1997 Achim Bohnet <ach@rosat.mpe-garching.mpg.de>
#
#	* now 'dl' is always removed from libswanted. Not only if
#	  optimize is an empty string.
#	 
#
#	17-Jan-1997 Achim Bohnet <ach@rosat.mpe-garching.mpg.de>
#
#	* Removed 'dl' from libswanted: When the FreePort binary
#	  translator for Sun binaries is installed Configure concludes
#	  that it should use libdl.x.yz.fpx.so :-(
#	  Because the dlopen, dlclose,... calls are in the
#	  C library it not necessary at all to check for the
#	  dl library.  Therefore dl is removed from libswanted.
#	
#
#	1-Jan-1997 Achim Bohnet <ach@rosat.mpe-garching.mpg.de>
#	
#	* Set -Olimit to 3200 because perl_yylex.c got too big
#	  for the optimizer.
#
Commit	Line	Data
a0d0e21e	1	# hints/dec_osf.sh
8e964347	2
b971f6e4	3	# * If you want to debug perl or want to send a
8e964347 AB	4	# stack trace for inclusion into an bug report, call
	5	# Configure with the additional argument -Doptimize=-g2
	6	# or uncomment this assignment to "optimize":
	7	#
	8	#optimize=-g2
	9	#
8a019ce7 JH	10	# If you want both to optimise and debug with the DEC cc
	11	# you must have -g3, e.g. "-O4 -g3", and (re)run Configure.
	12	#
b971f6e4	13	# * gcc can always have both -g and optimisation on.
8a019ce7	14	#
b971f6e4	15	# * debugging optimised code, no matter what compiler
8a019ce7 JH	16	# one is using, can be surprising and confusing because of
	17	# the optimisation tricks like code motion, code removal,
	18	# loop unrolling, and inlining. The source code and the
	19	# executable code simply do not agree any more while in
	20	# mid-execution, the optimiser only cares about the results.
	21	#
b971f6e4	22	# * Configure will automatically add the often quoted
f2c69087 JH	23	# -DDEBUGGING for you if the -g is specified.
f2c69087 JH	24	#
b971f6e4	25	# * There is even more optimisation available in the new
f2c69087 JH	26	# (GEM) DEC cc: -O5 and -fast. "man cc" will tell more about them.
	27	# The jury is still out whether either or neither help for Perl
	28	# and how much. Based on very quick testing, -fast boosts
	29	# raw data copy by about 5-15% (-fast brings in, among other
	30	# things, inlined, ahem, fast memcpy()), while on the other
	31	# hand searching things (index, m//, s///), seems to get slower.
	32	# Your mileage will vary.
8e964347	33	#
b971f6e4	34	# * The -std is needed because the following compiled
e60a08f8 JH	35	# without the -std and linked with -lm
	36	#
	37	# #include <math.h>
	38	# #include <stdio.h>
	39	# int main(){short x=10,y=sqrt(x);printf("%d\n",y);}
	40	#
	41	# will in Digital UNIX 3.* and 4.0b print 0 -- and in Digital
	42	# UNIX 4.0{,a} dump core: Floating point exception in the printf(),
	43	# the y has become a signaling NaN.
	44	#
b971f6e4	45	# * Compilation warnings like:
	46	#
	47	# "Undefined the ANSI standard macro ..."
	48	#
	49	# can be ignored, at least while compiling the POSIX extension
	50	# and especially if using the sfio (the latter is not a standard
	51	# part of Perl, never mind if it says little to you).
	52	#
8e964347	53
e60a08f8 JH	54	# If using the DEC compiler we must find out the DEC compiler style:
	55	# the style changed between Digital UNIX (aka DEC OSF/1) 3 and
	56	# Digital UNIX 4. The old compiler was originally from Ultrix and
	57	# the MIPS company, the new compiler is originally from the VAX world
	58	# and it is called GEM. Many of the options we are going to use depend
	59	# on the compiler style.
	60
a68015de JH	61	cc=${cc:-cc}
a68015de JH	62
b691c02f JH	63	# do NOT, I repeat, NOT take away the leading tabs
b691c02f JH	64	# Configure Black Magic (TM)
b971f6e4	65	# reset
e60a08f8	66	_DEC_cc_style=
8d5a0f9f	67	case "`$cc -v 2>&1 \| grep cc`" in
e60a08f8 JH	68	gcc) ;; # pass
	69	*) # compile something small: taint.c is fine for this.
	70	# the main point is the '-v' flag of 'cc'.
	71	case "`cc -v -I. -c taint.c -o /tmp/taint$$.o 2>&1`" in
	72	/gemc_cc) # we have the new DEC GEM CC
dfa3a3d3	73	_DEC_cc_style=new
8a019ce7	74	;;
e60a08f8	75	*) # we have the old MIPS CC
dfa3a3d3	76	_DEC_cc_style=old
8a019ce7	77	;;
e60a08f8 JH	78	esac
	79	# cleanup
	80	rm -f /tmp/taint$$.o
	81	;;
	82	esac
	83
b971f6e4	84	# be nauseatingly ANSI
8d5a0f9f	85	case "`$cc -v 2>&1 \| grep gcc`" in
9607fc9c	86	gcc) ccflags="$ccflags -ansi"
b971f6e4	87	;;
	88	*) ccflags="$ccflags -std"
	89	;;
	90	esac
	91
	92	# for gcc the Configure knows about the -fpic:
	93	# position-independent code for dynamic loading
	94
e60a08f8 JH	95	# we want optimisation
	96
	97	case "$optimize" in
8d5a0f9f	98	'') case "`$cc -v 2>&1 \| grep gcc`" in
e60a08f8 JH	99	gcc)
	100	optimize='-O3' ;;
	101	*) case "$_DEC_cc_style" in
313489a2 SB	102	new) optimize='-O4'
	103	ccflags="$ccflags -fprm d -ieee"
	104	;;
e60a08f8 JH	105	old) optimize='-O2 -Olimit 3200' ;;
e60a08f8 JH	106	esac
b971f6e4	107	ccflags="$ccflags -D_INTRINSICS"
e60a08f8	108	;;
8e964347 AB	109	esac
8e964347 AB	110	;;
1fc4cb55	111	esac
28757baa	112
313489a2 SB	113	# Make glibpth agree with the compiler suite. Note that /shlib
	114	# is not here. That's on purpose. Even though that's where libc
	115	# really lives from V4.0 on, the linker (and /sbin/loader) won't
	116	# look there by default. The sharable /sbin utilities were all
	117	# built with "-Wl,-rpath,/shlib" to get around that. This makes
	118	# no attempt to figure out the additional location(s) searched by
	119	# gcc, since not all versions of gcc are easily coerced into
	120	# revealing that information.
b0362887 SB	121	glibpth="/usr/shlib /usr/ccs/lib /usr/lib/cmplrs/cc"
b0362887 SB	122	glibpth="$glibpth /usr/lib /usr/local/lib /var/shlib"
313489a2	123
8e964347 AB	124	# dlopen() is in libc
	125	libswanted="`echo $libswanted \| sed -e 's/ dl / /'`"
	126
b971f6e4	127	# libPW contains nothing useful for perl
8a019ce7 JH	128	libswanted="`echo $libswanted \| sed -e 's/ PW / /'`"
8a019ce7 JH	129
723e14d4 SB	130	# libnet contains nothing useful for perl here, and doesn't work
	131	libswanted="`echo $libswanted \| sed -e 's/ net / /'`"
	132
b971f6e4	133	# libbsd contains nothing used by perl that is not already in libc
8a019ce7 JH	134	libswanted="`echo $libswanted \| sed -e 's/ bsd / /'`"
8a019ce7 JH	135
b971f6e4	136	# libc need not be separately listed
8a019ce7 JH	137	libswanted="`echo $libswanted \| sed -e 's/ c / /'`"
8a019ce7 JH	138
b971f6e4	139	# ndbm is already in libc
b971f6e4	140	libswanted="`echo $libswanted \| sed -e 's/ ndbm / /'`"
8a019ce7 JH	141
	142	# the basic lddlflags used always
	143	lddlflags='-shared -expect_unresolved "*"'
	144
b971f6e4	145	# Fancy compiler suites use optimising linker as well as compiler.
b971f6e4	146	# <spider@Orb.Nashua.NH.US>
b8f0c030	147	case "`uname -r`" in
b971f6e4	148	[123].) # old loader
	149	lddlflags="$lddlflags -O3"
	150	;;
a07564da KS	151	*) if $test "X$optimize" = "X$undef"; then
	152	lddlflags="$lddlflags -msym"
	153	else
baa8820a	154	case "`/usr/sbin/sizer -v`" in
e3159d07 JH	155	4.0D)
	156	# QAR 56761: -O4 + .so may produce broken code,
	157	# fixed in 4.0E or better.
	158	;;
	159	*)
	160	lddlflags="$lddlflags $optimize"
	161	;;
	162	esac
	163	# -msym: If using a sufficiently recent /sbin/loader,
	164	# keep the module symbols with the modules.
baa8820a	165	lddlflags="$lddlflags -msym -std"
a07564da	166	fi
b971f6e4	167	;;
	168	esac
	169	# Yes, the above loses if gcc does not use the system linker.
	170	# If that happens, let me know about it. <jhi@iki.fi>
	171
8a019ce7	172
b971f6e4	173	# If debugging or (old systems and doing shared)
	174	# then do not strip the lib, otherwise, strip.
	175	# As noted above the -DDEBUGGING is added automagically by Configure if -g.
8a019ce7 JH	176	case "$optimize" in
8a019ce7 JH	177	-g) ;; # left intentionally blank
b8f0c030	178	*) case "`uname -r`" in
b971f6e4	179	[123].)
	180	case "$useshrplib" in
	181	false\|undef\|'') lddlflags="$lddlflags -s" ;;
	182	esac
	183	;;
8a019ce7	184	*) lddlflags="$lddlflags -s"
b971f6e4	185	;;
	186	esac
	187	;;
8a019ce7	188	esac
8e964347 AB	189
8e964347 AB	190	#
313489a2 SB	191	# Make embedding in things like INN and Apache more memory friendly.
	192	# Keep it overridable on the Configure command line, though, so that
	193	# "-Uuseshrplib" prevents this default.
	194	#
	195
2bf2710f GS	196	case "$_DEC_cc_style.$useshrplib" in
	197	new.) useshrplib="$define" ;;
	198	esac
313489a2	199
85ab1d1d JH	200	# The EFF_ONLY_OK from <sys/access.h> is present but dysfunctional for
	201	# [RWX]_OK as of Digital UNIX 4.0[A-D]?. If and when this gets fixed,
	202	# please adjust this appropriately. See also pp_sys.c just before the
	203	# emulate_eaccess().
5ff3f7a4	204
baa8820a JH	205	# Fixed in V5.0A.
baa8820a JH	206	case "`/usr/sbin/sizer -v`" in
f60a5d46	207	5.0[A-Z]\|5.[1-9]\|[6-9].[0-9])
baa8820a JH	208	: ok
	209	;;
	210	*)
	211	# V5.0 or previous
5ff3f7a4	212	pp_sys_cflags='ccflags="$ccflags -DNO_EFF_ONLY_OK"'
baa8820a JH	213	;;
baa8820a JH	214	esac
5ff3f7a4	215
6b8eaf93 JH	216	# The off_t is already 8 bytes, so we do have largefileness.
6b8eaf93 JH	217
f60a5d46	218	cat > UU/usethreads.cbu <<'EOCBU'
104d25b7 JH	219	# This script UU/usethreads.cbu will get 'called-back' by Configure
104d25b7 JH	220	# after it has prompted the user for whether to use threads.
104d25b7 JH	221	case "$usethreads" in
104d25b7 JH	222	$define\|true\|[yY]*)
75d72f2c	223	# Threads interfaces changed with V4.0.
8d5a0f9f	224	case "`$cc -v 2>&1 \| grep gcc`" in
75d72f2c JH	225	gcc)ccflags="-D_REENTRANT $ccflags" ;;
	226	*) case "`uname -r`" in
	227	[123].) ccflags="-threads $ccflags" ;;
	228	*) ccflags="-pthread $ccflags" ;;
	229	esac
104d25b7	230	;;
75d72f2c JH	231	esac
	232	case "`uname -r`" in
	233	[123].) libswanted="$libswanted pthreads mach exc c_r" ;;
	234	*) libswanted="$libswanted pthread exc" ;;
	235	esac
e883c329	236
baa8820a JH	237	case "$usemymalloc" in
	238	'')
	239	usemymalloc='n'
	240	;;
	241	esac
104d25b7 JH	242	;;
	243	esac
	244	EOCBU
	245
f60a5d46 JH	246	cat > UU/uselongdouble.cbu <<'EOCBU'
	247	# This script UU/uselongdouble.cbu will get 'called-back' by Configure
	248	# after it has prompted the user for whether to use long doubles.
	249	case "$uselongdouble" in
	250	$define\|true\|[yY]) d_Gconvert='sprintf((b),"%.Lg",(n),(x))' ;;
	251	esac
	252	EOCBU
	253
313489a2	254	#
e60a08f8 JH	255	# Unset temporary variables no more needed.
	256	#
	257
	258	unset _DEC_cc_style
	259
	260	#
8e964347 AB	261	# History:
8e964347 AB	262	#
85ab1d1d JH	263	# perl5.005_51:
	264	#
	265	# September-1998 Jarkko Hietaniemi <jhi@iki.fi>
	266	#
	267	# * Added the -DNO_EFF_ONLY_OK flag ('use filetest;' support).
	268	#
313489a2 SB	269	# perl5.004_57:
	270	#
	271	# 19-Dec-1997 Spider Boardman <spider@Orb.Nashua.NH.US>
	272	#
85ab1d1d	273	# * Newer Digital UNIX compilers enforce signaling for NaN without
313489a2 SB	274	# -ieee. Added -fprm d at the same time since it's friendlier for
	275	# embedding.
	276	#
	277	# * Fixed the library search path to match cc, ld, and /sbin/loader.
	278	#
	279	# * Default to building -Duseshrplib on newer systems. -Uuseshrplib
	280	# still overrides.
	281	#
	282	# * Fix -pthread additions for useshrplib. ld has no -pthread option.
	283	#
	284	#
723e14d4 SB	285	# perl5.004_04:
	286	#
	287	# 19-Sep-1997 Spider Boardman <spider@Orb.Nashua.NH.US>
	288	#
	289	# * libnet on Digital UNIX is for JAVA, not for sockets.
	290	#
	291	#
b971f6e4	292	# perl5.003_28:
	293	#
	294	# 22-Feb-1997 Jarkko Hietaniemi <jhi@iki.fi>
	295	#
	296	# * Restructuring Spider's suggestions.
	297	#
	298	# * Older Digital UNIXes cannot handle -Olimit ... for $lddlflags.
	299	#
	300	# * ld -s cannot be used in older Digital UNIXes when doing shared.
	301	#
	302	#
	303	# 21-Feb-1997 Spider Boardman <spider@Orb.Nashua.NH.US>
	304	#
	305	# * -hidden removed.
	306	#
	307	# * -DSTANDARD_C removed.
	308	#
	309	# * -D_INTRINSICS added. (that -fast does not seem to buy much confirmed)
	310	#
	311	# * odbm not in libc, only ndbm. Therefore dbm back to $libswanted.
	312	#
	313	# * -msym for the newer runtime loaders.
	314	#
	315	# * $optimize also in $lddflags.
	316	#
	317	#
e60a08f8 JH	318	# perl5.003_27:
	319	#
	320	# 18-Feb-1997 Jarkko Hietaniemi <jhi@iki.fi>
	321	#
	322	# * unset _DEC_cc_style and more commentary on -std.
	323	#
	324	#
dfa3a3d3 CS	325	# perl5.003_26:
	326	#
	327	# 15-Feb-1997 Jarkko Hietaniemi <jhi@iki.fi>
	328	#
e60a08f8	329	# * -std and -ansi.
dfa3a3d3 CS	330	#
dfa3a3d3 CS	331	#
f2c69087 JH	332	# perl5.003_24:
	333	#
	334	# 30-Jan-1997 Jarkko Hietaniemi <jhi@iki.fi>
	335	#
	336	# * Fixing the note on -DDEBUGGING.
	337	#
	338	# * Note on -O5 -fast.
	339	#
	340	#
8a019ce7 JH	341	# perl5.003_23:
	342	#
	343	# 26-Jan-1997 Jarkko Hietaniemi <jhi@iki.fi>
	344	#
	345	# * Notes on how to do both optimisation and debugging.
	346	#
	347	#
	348	# 25-Jan-1997 Jarkko Hietaniemi <jhi@iki.fi>
	349	#
	350	# * Remove unneeded libraries from $libswanted: PW, bsd, c, dbm
	351	#
	352	# * Restructure the $lddlflags build.
	353	#
	354	# * $optimize based on which compiler we have.
	355	#
	356	#
8e964347 AB	357	# perl5.003_22:
	358	#
	359	# 23-Jan-1997 Achim Bohnet <ach@rosat.mpe-garching.mpg.de>
	360	#
	361	# * Added comments 'how to create a debugging version of perl'
	362	#
	363	# * Fixed logic of this script to prevent stripping of shared
	364	# objects by the loader (see ld man page for -s) is debugging
	365	# is set via the -g switch.
	366	#
	367	#
	368	# 21-Jan-1997 Achim Bohnet <ach@rosat.mpe-garching.mpg.de>
	369	#
	370	# * now 'dl' is always removed from libswanted. Not only if
	371	# optimize is an empty string.
	372	#
	373	#
	374	# 17-Jan-1997 Achim Bohnet <ach@rosat.mpe-garching.mpg.de>
	375	#
	376	# * Removed 'dl' from libswanted: When the FreePort binary
	377	# translator for Sun binaries is installed Configure concludes
	378	# that it should use libdl.x.yz.fpx.so :-(
	379	# Because the dlopen, dlclose,... calls are in the
	380	# C library it not necessary at all to check for the
	381	# dl library. Therefore dl is removed from libswanted.
	382	#
	383	#
	384	# 1-Jan-1997 Achim Bohnet <ach@rosat.mpe-garching.mpg.de>
	385	#
	386	# * Set -Olimit to 3200 because perl_yylex.c got too big
	387	# for the optimizer.
	388	#