This is a live mirror of the Perl 5 development currently hosted at https://github.com/perl/perl5
Thinko: we want the flags for native cc, not gcc.
[perl5.git] / hints / dec_osf.sh
CommitLineData
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.
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
61cc=${cc:-cc}
62
6c7aff00
JH
63case "`$cc -v 2>&1 | grep cc`" in
64*gcc*) isgcc=gcc ;;
65esac
66
b691c02f
JH
67# do NOT, I repeat, *NOT* take away the leading tabs
68# Configure Black Magic (TM)
b971f6e4 69 # reset
e60a08f8 70 _DEC_cc_style=
6c7aff00
JH
71case "$isgcc" in
72gcc) _gcc_version=`$cc --version 2>&1 | tr . ' '`
2cae8c0d 73 set $_gcc_version
3f8b8817 74 if test "$1" -lt 2 -o \( "$1" -eq 2 -a \( "$2" -lt 95 -o \( "$2" -eq 95 -a "$3" -lt 2 \) \) \); then
2cae8c0d
JH
75 cat >&4 <<EOF
76
61f70568
JB
77*** Your cc seems to be gcc and its version ($_gcc_version) seems to be
78*** less than 2.95.2. This is not a good idea since old versions of gcc
79*** are known to produce buggy code when compiling Perl (and no doubt for
80*** other programs, too).
3f8b8817 81***
61f70568
JB
82*** Therefore, I strongly suggest upgrading your gcc. (Why don't you use
83*** the vendor cc is also a good question. It comes with the operating
3f8b8817 84*** system and produces good code.)
2cae8c0d
JH
85
86Cannot continue, aborting.
87
88EOF
89 exit 1
90 fi
3f8b8817
JH
91 if test "$1" -eq 2 -a "$2" -eq 95 -a "$3" -le 2; then
92 cat >&4 <<EOF
93
94*** Note that as of gcc 2.95.2 (19991024) and Perl 5.6.0 (March 2000)
95*** if the said Perl is compiled with the said gcc the lib/sdbm test
61f70568
JB
96*** may dump core (meaning that the SDBM_File extension is unusable).
97*** As this core dump never happens with the vendor cc, this is most
98*** probably a lingering bug in gcc. Therefore unless you have a better
99*** gcc installation you are still better off using the vendor cc.
3f8b8817
JH
100
101Since you explicitly chose gcc, I assume that you know what are doing.
102
103EOF
104 fi
2cae8c0d 105 ;;
e60a08f8 106*) # compile something small: taint.c is fine for this.
4de7e3a2 107 ccversion=`cc -V | awk '/(Compaq|DEC) C/ {print $3}' | grep '^V'`
e60a08f8 108 # the main point is the '-v' flag of 'cc'.
52c7d5b6 109 case "`cc -v -I. -c taint.c -o taint$$.o 2>&1`" in
e60a08f8 110 */gemc_cc*) # we have the new DEC GEM CC
dfa3a3d3 111 _DEC_cc_style=new
8a019ce7 112 ;;
e60a08f8 113 *) # we have the old MIPS CC
dfa3a3d3 114 _DEC_cc_style=old
8a019ce7 115 ;;
e60a08f8
JH
116 esac
117 # cleanup
52c7d5b6 118 rm -f taint$$.o
e60a08f8
JH
119 ;;
120esac
121
b971f6e4 122# be nauseatingly ANSI
6c7aff00
JH
123case "$isgcc" in
124gcc) ccflags="$ccflags -ansi"
b971f6e4 125 ;;
126*) ccflags="$ccflags -std"
127 ;;
128esac
129
130# for gcc the Configure knows about the -fpic:
131# position-independent code for dynamic loading
132
e60a08f8
JH
133# we want optimisation
134
135case "$optimize" in
6c7aff00
JH
136'') case "$isgcc" in
137 gcc) optimize='-O3' ;;
e60a08f8 138 *) case "$_DEC_cc_style" in
6c7aff00 139 new) optimize='-O4' ;;
e60a08f8
JH
140 old) optimize='-O2 -Olimit 3200' ;;
141 esac
b971f6e4 142 ccflags="$ccflags -D_INTRINSICS"
e60a08f8 143 ;;
8e964347
AB
144 esac
145 ;;
1fc4cb55 146esac
28757baa 147
6c7aff00
JH
148# we want dynamic fp rounding mode, and we want ieee exception semantics
149case "$isgcc" in
a59bce4b
JH
150gcc) ;;
151*) case "$_DEC_cc_style" in
6c7aff00
JH
152 new) ccflags="$ccflags -fprm d -ieee" ;;
153 esac
154 ;;
155esac
156
313489a2
SB
157# Make glibpth agree with the compiler suite. Note that /shlib
158# is not here. That's on purpose. Even though that's where libc
159# really lives from V4.0 on, the linker (and /sbin/loader) won't
160# look there by default. The sharable /sbin utilities were all
161# built with "-Wl,-rpath,/shlib" to get around that. This makes
162# no attempt to figure out the additional location(s) searched by
163# gcc, since not all versions of gcc are easily coerced into
164# revealing that information.
b0362887
SB
165glibpth="/usr/shlib /usr/ccs/lib /usr/lib/cmplrs/cc"
166glibpth="$glibpth /usr/lib /usr/local/lib /var/shlib"
313489a2 167
8e964347
AB
168# dlopen() is in libc
169libswanted="`echo $libswanted | sed -e 's/ dl / /'`"
170
b971f6e4 171# libPW contains nothing useful for perl
8a019ce7
JH
172libswanted="`echo $libswanted | sed -e 's/ PW / /'`"
173
723e14d4
SB
174# libnet contains nothing useful for perl here, and doesn't work
175libswanted="`echo $libswanted | sed -e 's/ net / /'`"
176
b971f6e4 177# libbsd contains nothing used by perl that is not already in libc
8a019ce7
JH
178libswanted="`echo $libswanted | sed -e 's/ bsd / /'`"
179
b971f6e4 180# libc need not be separately listed
8a019ce7
JH
181libswanted="`echo $libswanted | sed -e 's/ c / /'`"
182
b971f6e4 183# ndbm is already in libc
184libswanted="`echo $libswanted | sed -e 's/ ndbm / /'`"
8a019ce7
JH
185
186# the basic lddlflags used always
187lddlflags='-shared -expect_unresolved "*"'
188
b971f6e4 189# Fancy compiler suites use optimising linker as well as compiler.
190# <spider@Orb.Nashua.NH.US>
b8f0c030 191case "`uname -r`" in
b971f6e4 192*[123].*) # old loader
193 lddlflags="$lddlflags -O3"
194 ;;
a07564da
KS
195*) if $test "X$optimize" = "X$undef"; then
196 lddlflags="$lddlflags -msym"
197 else
baa8820a 198 case "`/usr/sbin/sizer -v`" in
e3159d07
JH
199 *4.0D*)
200 # QAR 56761: -O4 + .so may produce broken code,
201 # fixed in 4.0E or better.
202 ;;
203 *)
204 lddlflags="$lddlflags $optimize"
205 ;;
206 esac
207 # -msym: If using a sufficiently recent /sbin/loader,
208 # keep the module symbols with the modules.
baa8820a 209 lddlflags="$lddlflags -msym -std"
a07564da 210 fi
b971f6e4 211 ;;
212esac
213# Yes, the above loses if gcc does not use the system linker.
214# If that happens, let me know about it. <jhi@iki.fi>
215
8a019ce7 216
b971f6e4 217# If debugging or (old systems and doing shared)
218# then do not strip the lib, otherwise, strip.
219# As noted above the -DDEBUGGING is added automagically by Configure if -g.
8a019ce7
JH
220case "$optimize" in
221 *-g*) ;; # left intentionally blank
b8f0c030 222*) case "`uname -r`" in
b971f6e4 223 *[123].*)
224 case "$useshrplib" in
225 false|undef|'') lddlflags="$lddlflags -s" ;;
226 esac
227 ;;
8a019ce7 228 *) lddlflags="$lddlflags -s"
b971f6e4 229 ;;
230 esac
231 ;;
8a019ce7 232esac
8e964347
AB
233
234#
313489a2
SB
235# Make embedding in things like INN and Apache more memory friendly.
236# Keep it overridable on the Configure command line, though, so that
237# "-Uuseshrplib" prevents this default.
238#
239
2bf2710f
GS
240case "$_DEC_cc_style.$useshrplib" in
241 new.) useshrplib="$define" ;;
242esac
313489a2 243
85ab1d1d
JH
244# The EFF_ONLY_OK from <sys/access.h> is present but dysfunctional for
245# [RWX]_OK as of Digital UNIX 4.0[A-D]?. If and when this gets fixed,
246# please adjust this appropriately. See also pp_sys.c just before the
247# emulate_eaccess().
5ff3f7a4 248
baa8820a
JH
249# Fixed in V5.0A.
250case "`/usr/sbin/sizer -v`" in
f60a5d46 251*5.0[A-Z]*|*5.[1-9]*|*[6-9].[0-9]*)
baa8820a
JH
252 : ok
253 ;;
254*)
255# V5.0 or previous
5ff3f7a4 256pp_sys_cflags='ccflags="$ccflags -DNO_EFF_ONLY_OK"'
baa8820a
JH
257 ;;
258esac
5ff3f7a4 259
6b8eaf93
JH
260# The off_t is already 8 bytes, so we do have largefileness.
261
f60a5d46 262cat > UU/usethreads.cbu <<'EOCBU'
104d25b7
JH
263# This script UU/usethreads.cbu will get 'called-back' by Configure
264# after it has prompted the user for whether to use threads.
104d25b7
JH
265case "$usethreads" in
266$define|true|[yY]*)
75d72f2c 267 # Threads interfaces changed with V4.0.
6c7aff00
JH
268 case "$isgcc" in
269 gcc) ccflags="-D_REENTRANT $ccflags" ;;
75d72f2c
JH
270 *) case "`uname -r`" in
271 *[123].*) ccflags="-threads $ccflags" ;;
272 *) ccflags="-pthread $ccflags" ;;
273 esac
104d25b7 274 ;;
75d72f2c
JH
275 esac
276 case "`uname -r`" in
277 *[123].*) libswanted="$libswanted pthreads mach exc c_r" ;;
278 *) libswanted="$libswanted pthread exc" ;;
279 esac
e883c329 280
baa8820a
JH
281 case "$usemymalloc" in
282 '')
283 usemymalloc='n'
284 ;;
285 esac
104d25b7
JH
286 ;;
287esac
288EOCBU
289
f60a5d46
JH
290cat > UU/uselongdouble.cbu <<'EOCBU'
291# This script UU/uselongdouble.cbu will get 'called-back' by Configure
292# after it has prompted the user for whether to use long doubles.
293case "$uselongdouble" in
bef5f079
JH
294$define|true|[yY]*)
295 case "`/usr/sbin/sizer -v`" in
296 *[1-4].0*) cat >&4 <<EOF
297
298***
299*** Sorry, you cannot use long doubles in pre-V5.0 releases of Tru64.
300***
301
302Cannot continue, aborting.
303
304EOF
305 exit 1
306 ;;
307 esac
308 d_Gconvert='sprintf((b),"%.*Lg",(n),(x))'
309 ;;
f60a5d46
JH
310esac
311EOCBU
312
1cade9fc 313case "`/usr/sbin/sizer -v`" in
bef5f079 314*[1-4].0*) d_modfl=undef ;; # must wait till 5.0
1cade9fc
JH
315esac
316
313489a2 317#
e60a08f8
JH
318# Unset temporary variables no more needed.
319#
320
321unset _DEC_cc_style
322
323#
8e964347
AB
324# History:
325#
85ab1d1d
JH
326# perl5.005_51:
327#
328# September-1998 Jarkko Hietaniemi <jhi@iki.fi>
329#
330# * Added the -DNO_EFF_ONLY_OK flag ('use filetest;' support).
331#
313489a2
SB
332# perl5.004_57:
333#
334# 19-Dec-1997 Spider Boardman <spider@Orb.Nashua.NH.US>
335#
85ab1d1d 336# * Newer Digital UNIX compilers enforce signaling for NaN without
313489a2
SB
337# -ieee. Added -fprm d at the same time since it's friendlier for
338# embedding.
339#
340# * Fixed the library search path to match cc, ld, and /sbin/loader.
341#
342# * Default to building -Duseshrplib on newer systems. -Uuseshrplib
343# still overrides.
344#
345# * Fix -pthread additions for useshrplib. ld has no -pthread option.
346#
347#
723e14d4
SB
348# perl5.004_04:
349#
350# 19-Sep-1997 Spider Boardman <spider@Orb.Nashua.NH.US>
351#
352# * libnet on Digital UNIX is for JAVA, not for sockets.
353#
354#
b971f6e4 355# perl5.003_28:
356#
357# 22-Feb-1997 Jarkko Hietaniemi <jhi@iki.fi>
358#
359# * Restructuring Spider's suggestions.
360#
361# * Older Digital UNIXes cannot handle -Olimit ... for $lddlflags.
362#
363# * ld -s cannot be used in older Digital UNIXes when doing shared.
364#
365#
366# 21-Feb-1997 Spider Boardman <spider@Orb.Nashua.NH.US>
367#
368# * -hidden removed.
369#
370# * -DSTANDARD_C removed.
371#
372# * -D_INTRINSICS added. (that -fast does not seem to buy much confirmed)
373#
374# * odbm not in libc, only ndbm. Therefore dbm back to $libswanted.
375#
376# * -msym for the newer runtime loaders.
377#
378# * $optimize also in $lddflags.
379#
380#
e60a08f8
JH
381# perl5.003_27:
382#
383# 18-Feb-1997 Jarkko Hietaniemi <jhi@iki.fi>
384#
385# * unset _DEC_cc_style and more commentary on -std.
386#
387#
dfa3a3d3
CS
388# perl5.003_26:
389#
390# 15-Feb-1997 Jarkko Hietaniemi <jhi@iki.fi>
391#
e60a08f8 392# * -std and -ansi.
dfa3a3d3
CS
393#
394#
f2c69087
JH
395# perl5.003_24:
396#
397# 30-Jan-1997 Jarkko Hietaniemi <jhi@iki.fi>
398#
399# * Fixing the note on -DDEBUGGING.
400#
401# * Note on -O5 -fast.
402#
403#
8a019ce7
JH
404# perl5.003_23:
405#
406# 26-Jan-1997 Jarkko Hietaniemi <jhi@iki.fi>
407#
408# * Notes on how to do both optimisation and debugging.
409#
410#
411# 25-Jan-1997 Jarkko Hietaniemi <jhi@iki.fi>
412#
413# * Remove unneeded libraries from $libswanted: PW, bsd, c, dbm
414#
415# * Restructure the $lddlflags build.
416#
417# * $optimize based on which compiler we have.
418#
419#
8e964347
AB
420# perl5.003_22:
421#
422# 23-Jan-1997 Achim Bohnet <ach@rosat.mpe-garching.mpg.de>
423#
424# * Added comments 'how to create a debugging version of perl'
425#
426# * Fixed logic of this script to prevent stripping of shared
427# objects by the loader (see ld man page for -s) is debugging
428# is set via the -g switch.
429#
430#
431# 21-Jan-1997 Achim Bohnet <ach@rosat.mpe-garching.mpg.de>
432#
433# * now 'dl' is always removed from libswanted. Not only if
434# optimize is an empty string.
435#
436#
437# 17-Jan-1997 Achim Bohnet <ach@rosat.mpe-garching.mpg.de>
438#
439# * Removed 'dl' from libswanted: When the FreePort binary
440# translator for Sun binaries is installed Configure concludes
441# that it should use libdl.x.yz.fpx.so :-(
442# Because the dlopen, dlclose,... calls are in the
443# C library it not necessary at all to check for the
444# dl library. Therefore dl is removed from libswanted.
445#
446#
447# 1-Jan-1997 Achim Bohnet <ach@rosat.mpe-garching.mpg.de>
448#
449# * Set -Olimit to 3200 because perl_yylex.c got too big
450# for the optimizer.
451#