3 # * If you want to debug perl or want to send a
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":
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.
13 # * gcc can always have both -g and optimisation on.
15 # * debugging optimised code, no matter what compiler
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.
22 # * Configure will automatically add the often quoted
23 # -DDEBUGGING for you if the -g is specified.
25 # * There is even more optimisation available in the new
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.
34 # * The -std is needed because the following compiled
35 # without the -std and linked with -lm
39 # int main(){short x=10,y=sqrt(x);printf("%d\n",y);}
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.
45 # * Compilation warnings like:
47 # "Undefined the ANSI standard macro ..."
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).
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.
63 # Intentional leading tabs.
64 myosvers="`/usr/sbin/sizer -v 2>/dev/null || uname -r`"
67 # Fancy compiler suites use optimising linker as well as compiler.
68 # <spider@Orb.Nashua.NH.US>
70 *[123].*) # old loader
71 lddlflags="$lddlflags -O3"
73 *) if $test "X$optimize" = "X$undef"; then
74 lddlflags="$lddlflags -msym"
78 # QAR 56761: -O4 + .so may produce broken code,
79 # fixed in 4.0E or better.
82 lddlflags="$lddlflags $optimize"
85 # -msym: If using a sufficiently recent /sbin/loader,
86 # keep the module symbols with the modules.
87 lddlflags="$lddlflags -msym $_lddlflags_strict_ansi"
91 # Yes, the above loses if gcc does not use the system linker.
92 # If that happens, let me know about it. <jhi@iki.fi>
94 # Because there is no other handy way to recognize 3.X.
96 *3.*) ccflags="$ccflags -DDEC_OSF1_3_X" ;;
99 case "`$cc -v 2>&1 | grep cc`" in
103 # do NOT, I repeat, *NOT* take away the leading tabs
104 # Configure Black Magic (TM)
108 gcc) if [ "X$gccversion" = "X" ]; then
109 # Done too late in Configure if hinted
110 gccversion=`$cc -dumpversion`
113 if test "$1" -lt 2 -o \( "$1" -eq 2 -a \( "$2" -lt 95 -o \( "$2" -eq 95 -a "$3" -lt 3 \) \) \); then
116 *** Your cc seems to be gcc and its version ($gccversion) seems to be
117 *** less than 2.95.3. This is not a good idea since old versions of gcc
118 *** are known to produce buggy code when compiling Perl (and no doubt for
119 *** other programs, too).
121 *** Therefore, I strongly suggest upgrading your gcc. (Why don't you use
122 *** the vendor cc is also a good question. It comes with the operating
123 *** system, produces good code, and is very ANSI C fastidious.)
125 Cannot continue, aborting.
130 if test "$1" -eq 2 -a "$2" -eq 95 -a "$3" -le 2; then
133 *** Note that as of gcc 2.95.2 (19991024) and Perl 5.6.0 (March 2000)
134 *** if the said Perl is compiled with the said gcc the lib/sdbm test
135 *** may dump core (meaning that the SDBM_File extension is unusable).
136 *** As this core dump never happens with the vendor cc, this is most
137 *** probably a lingering bug in gcc. Therefore unless you have a better
138 *** gcc installation you are still better off using the vendor cc.
140 Since you explicitly chose gcc, I assume that you know what are doing.
144 # -ansi is fine for gcc in Tru64 (-ansi is not universally so).
145 _ccflags_strict_ansi="-ansi"
147 *) # compile something.
149 int main() { return 0; }
151 ccversion=`cc -V | awk '/(Compaq|DEC) C/ {print $3}' | grep '^V'`
152 # the main point is the '-v' flag of 'cc'.
153 case "`cc -v -c try.c 2>&1`" in
154 */gemc_cc*) # we have the new DEC GEM CC
157 *) # we have the old MIPS CC
161 # We need to figure out whether -c99 is a valid flag to use.
162 # If it is, we can use it for being nauseatingly C99 ANSI --
163 # but even then the lddlflags needs to stay -std1.
164 # If it is not, we must use -std1 for both flags.
166 case "`cc -c99 try.c 2>&1`" in
167 *"-c99: Unknown flag"*)
168 _ccflags_strict_ansi="-std1"
170 *) _ccflags_strict_ansi="-c99"
173 _lddlflags_strict_ansi="-std1"
174 # -no_ansi_alias because Perl code is not that strict
175 # (also gcc uses by default -fno-strict-aliasing).
178 *5.*) _ccflags_strict_ansi="$_ccflags_strict_ansi -no_ansi_alias" ;;
185 # Be nauseatingly ANSI
186 ccflags="$ccflags $_ccflags_strict_ansi"
188 # g++ needs a lot of definitions to see the same set of
189 # prototypes from <unistd.h> et alia as cxx/cc see.
190 # Note that we cannot define _XOPEN_SOURCE_EXTENDED or
191 # its moral equivalent, _XOPEN_SOURCE=500 (which would
192 # define a lot of the required prototypes for us), because
193 # the gcc-processed version of <sys/wait.h> contains fatally
194 # conflicting prototypes for wait3(). The _SOCKADDR_LEN is
195 # needed to get struct sockaddr and struct sockaddr_in to align.
197 *g++*) ccflags="$ccflags -D_XOPEN_SOURCE -D_OSF_SOURCE -D_AES_SOURCE -D_BSD -D_POSIX_C_SOURCE=199309L -D_POSIX_PII_SOCKET -D_SOCKADDR_LEN" ;;
200 # for gcc the Configure knows about the -fpic:
201 # position-independent code for dynamic loading
203 # we want optimisation
207 gcc) optimize='-O3' ;;
208 *) case "$_DEC_cc_style" in
209 new) optimize='-O4' ;;
210 old) optimize='-O2 -Olimit 3200' ;;
212 ccflags="$ccflags -D_INTRINSICS"
220 *) case "$optimize" in
221 *-O*) # With both -O and -g, the -g must be -g3.
222 optimize="`echo $optimize | sed 's/-g[1-4]*/-g3/'`"
228 ## Optimization limits
230 gcc) # gcc 3.2.1 wants a lot of memory for -O3'ing toke.c
233 #include <sys/resource.h>
238 int i = getrlimit (RLIMIT_DATA, &rl);
239 printf ("%d\n", rl.rlim_cur / (1024 * 1024));
242 $cc -o try $ccflags $ldflags try.c
245 if [ $maxdsiz -lt 256 ]; then
246 # less than 256 MB is probably not enough to optimize toke.c with gcc -O3
249 Your process datasize is limited to $maxdsiz MB, which is (sadly) not
250 always enough to fully optimize some source code files of Perl,
251 at least 256 MB seems to be necessary as of Perl 5.8.0. I'll try to
252 use a lower optimization level for those parts. You could either try
253 using your shell's ulimit/limit/limits command to raise your datasize
254 (assuming the system-wide hard resource limits allow you to go higher),
255 or if you can't go higher and if you are a sysadmin, and you *do* want
256 the full optimization, you can tune the 'max_per_proc_data_size'
257 kernel parameter: see man sysconfigtab, and man sys_attrs_proc.
260 toke_cflags='optimize=-O2'
266 # https://github.com/Perl/perl5/commit/73cb726371990cd489597c4fee405a9815abf4da
267 # broke things for gcc (at least gcc 3.3) so that many of the pack()
268 # checksum tests for formats L, j, J, especially when combined
269 # with the < and > specifiers, started to fail if compiled with plain -O3.
272 pp_pack_cflags='optimize="-O3 -fno-cse-skip-blocks"'
276 # we want dynamic fp rounding mode, and we want ieee exception semantics
278 gcc) ccflags="$ccflags -mfp-rounding-mode=d -mieee" ;;
279 *) case "$_DEC_cc_style" in
280 new) ccflags="$ccflags -fprm d -ieee" ;;
285 # Make glibpth agree with the compiler suite. Note that /shlib
286 # is not here. That's on purpose. Even though that's where libc
287 # really lives from V4.0 on, the linker (and /sbin/loader) won't
288 # look there by default. The sharable /sbin utilities were all
289 # built with "-Wl,-rpath,/shlib" to get around that. This makes
290 # no attempt to figure out the additional location(s) searched by
291 # gcc, since not all versions of gcc are easily coerced into
292 # revealing that information.
293 glibpth="/usr/shlib /usr/ccs/lib /usr/lib/cmplrs/cc"
294 glibpth="$glibpth /usr/lib /usr/local/lib /var/shlib"
296 # dlopen() is in libc
297 libswanted="`echo $libswanted | sed -e 's/ dl / /'`"
299 # libPW contains nothing useful for perl
300 libswanted="`echo $libswanted | sed -e 's/ PW / /'`"
302 # libnet contains nothing useful for perl here, and doesn't work
303 libswanted="`echo $libswanted | sed -e 's/ net / /'`"
305 # libbsd contains nothing used by perl that is not already in libc
306 libswanted="`echo $libswanted | sed -e 's/ bsd / /'`"
308 # libc need not be separately listed
309 libswanted="`echo $libswanted | sed -e 's/ c / /'`"
311 # ndbm is already in libc
312 libswanted="`echo $libswanted | sed -e 's/ ndbm / /'`"
314 # the basic lddlflags used always
315 lddlflags='-shared -expect_unresolved "*"'
317 # If debugging or (old systems and doing shared)
318 # then do not strip the lib, otherwise, strip.
319 # As noted above the -DDEBUGGING is added automagically by Configure if -g.
321 *-g*) ;; # left intentionally blank
324 case "$useshrplib" in
325 false|undef|'') lddlflags="$lddlflags -s" ;;
328 *) lddlflags="$lddlflags -s"
335 # Make embedding in things like INN and Apache more memory friendly.
336 # Keep it overridable on the Configure command line, though, so that
337 # "-Uuseshrplib" prevents this default.
340 case "$_DEC_cc_style.$useshrplib" in
341 new.) useshrplib="$define" ;;
344 # The EFF_ONLY_OK from <sys/access.h> is present but dysfunctional for
345 # [RWX]_OK as of Digital UNIX 4.0[A-D]?. If and when this gets fixed,
346 # please adjust this appropriately. See also pp_sys.c just before the
351 *5.0[A-Z]*|*5.[1-9]*|*[6-9].[0-9]*)
356 pp_sys_cflags='ccflags="$ccflags -DNO_EFF_ONLY_OK"'
360 # The off_t is already 8 bytes, so we do have largefileness.
362 cat > UU/usethreads.cbu <<'EOCBU'
363 # This script UU/usethreads.cbu will get 'called-back' by Configure
364 # after it has prompted the user for whether to use threads.
365 case "$usethreads" in
367 # In Tru64 V5 (at least V5.1A, V5.1B) gcc (at least 3.2.2)
368 # cannot be used to compile a threaded Perl.
369 cat > pthread.c <<EOF
373 $cc -c pthread.c 2> pthread.err
374 if egrep -q "unrecognized compiler|syntax error" pthread.err; then
377 *** I'm sorry but your C compiler ($cc) cannot be used to
378 *** compile Perl with threads. The system C compiler should work.
381 Cannot continue, aborting.
388 # Threads interfaces changed with V4.0.
391 ccflags="-D_REENTRANT $ccflags"
394 *[123].*) ccflags="-threads $ccflags" ;;
395 *) ccflags="-pthread $ccflags" ;;
400 *[123].*) libswanted="$libswanted pthreads mach exc c_r" ;;
401 *) libswanted="$libswanted pthread exc" ;;
404 case "$usemymalloc" in
409 # These symbols are renamed in <time.h> so
410 # that the Configure hasproto doesn't see them.
411 d_asctime_r_proto="$define"
412 d_ctime_r_proto="$define"
413 d_gmtime_r_proto="$define"
414 d_localtime_r_proto="$define"
420 case "$usemallocwrap" in
421 '') usemallocwrap='define' ;;
424 cat > UU/uselongdouble.cbu <<'EOCBU'
425 # This script UU/uselongdouble.cbu will get 'called-back' by Configure
426 # after it has prompted the user for whether to use long doubles.
427 case "$uselongdouble" in
430 *[1-4].0*) cat >&4 <<EOF
433 *** Sorry, you cannot use long doubles in pre-V5.0 releases of Tru64.
436 Cannot continue, aborting.
442 # Test whether libc's been fixed yet for long doubles.
445 int main(int argc, char **argv)
447 unsigned long uvmax = ~0UL;
448 long double ld = uvmax + 0.0L;
449 char buf1[30], buf2[30];
451 (void) sprintf(buf1, "%lu", uvmax);
452 (void) sprintf(buf2, "%.0Lf", ld);
453 return strcmp(buf1, buf2) != 0;
456 # Don't bother trying to work with Configure's idea of
457 # cc and the various flags. This might not work as-is
458 # with gcc -- but we're testing libc, not the compiler.
459 if cc -o try $_ccflags_strict_ansi try.c && ./try
465 Warning! Your libc has not yet been patched so that its "%Lf" format for
466 printing long doubles shows all the significant digits. You will get errors
467 in the t/op/numconvert test because of this. (The data is still good
468 internally, and the "%e" format of printf() or sprintf() in perl will still
469 produce valid results.) See README.tru64 for additional details.
482 *[1-4].0*) d_modfl=undef ;; # must wait till 5.0
485 # Keep that leading tab.
486 old_LD_LIBRARY_PATH=$LD_LIBRARY_PATH
490 echo "Appending $p to LD_LIBRARY_PATH." >& 4
491 case "$LD_LIBRARY_PATH" in
492 '') LD_LIBRARY_PATH=$p ;;
493 *) LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$p ;;
497 case "$LD_LIBRARY_PATH" in
498 "$old_LD_LIBRARY_PATH") ;;
499 *) echo "LD_LIBRARY_PATH is now $LD_LIBRARY_PATH." >& 4 ;;
501 case "$LD_LIBRARY_PATH" in
503 * ) export LD_LIBRARY_PATH ;;
506 # Enforce strict data.
509 *) # -trapuv poisons uninitialized stack with
510 # 0xfff58005fff58005 which is as a pointer a segmentation fault and
511 # as a floating point a signaling NaN. As integers/longs that causes
512 # no traps but at least it is not zero.
513 # -readonly_strings moves string constants into read-only section
514 # which hopefully means that modifying them leads into segmentation
516 for i in -trapuv -readonly_strings
520 *) ccflags="$ccflags $i" ;;
526 # In Tru64 several slightly incompatible socket APIs are supported,
527 # which one applies is chosen with a set of defines:
528 # -D_SOCKADDR_LEN enables 4.4BSD and IPv6 interfaces
529 # -D_POSIX_PII_SOCKET enables socklen_t instead of size_t
530 for i in -D_SOCKADDR_LEN -D_POSIX_PII_SOCKET
534 *) ccflags="$ccflags $i" ;;
537 # For OSF/1 3.2, however, defining _SOCKADDR_LEN would be
538 # a bad idea since it breaks send() and recv().
540 *DEC_OSF1_3_X*SOCKADDR_LEN*)
541 ccflags=`echo " $ccflags " | sed -e 's/ -D_SOCKADDR_LEN / /'`
545 # These are in libm, but seem broken (there are no protos in headers,
546 # or man pages, either)
562 # Unset temporary variables no more needed.
572 # September-1998 Jarkko Hietaniemi <jhi@iki.fi>
574 # * Added the -DNO_EFF_ONLY_OK flag ('use filetest;' support).
578 # 19-Dec-1997 Spider Boardman <spider@Orb.Nashua.NH.US>
580 # * Newer Digital UNIX compilers enforce signaling for NaN without
581 # -ieee. Added -fprm d at the same time since it's friendlier for
584 # * Fixed the library search path to match cc, ld, and /sbin/loader.
586 # * Default to building -Duseshrplib on newer systems. -Uuseshrplib
589 # * Fix -pthread additions for useshrplib. ld has no -pthread option.
594 # 19-Sep-1997 Spider Boardman <spider@Orb.Nashua.NH.US>
596 # * libnet on Digital UNIX is for JAVA, not for sockets.
601 # 22-Feb-1997 Jarkko Hietaniemi <jhi@iki.fi>
603 # * Restructuring Spider's suggestions.
605 # * Older Digital UNIXes cannot handle -Olimit ... for $lddlflags.
607 # * ld -s cannot be used in older Digital UNIXes when doing shared.
610 # 21-Feb-1997 Spider Boardman <spider@Orb.Nashua.NH.US>
614 # * -DSTANDARD_C removed.
616 # * -D_INTRINSICS added. (that -fast does not seem to buy much confirmed)
618 # * odbm not in libc, only ndbm. Therefore dbm back to $libswanted.
620 # * -msym for the newer runtime loaders.
622 # * $optimize also in $lddflags.
627 # 18-Feb-1997 Jarkko Hietaniemi <jhi@iki.fi>
629 # * unset _DEC_cc_style and more commentary on -std.
634 # 15-Feb-1997 Jarkko Hietaniemi <jhi@iki.fi>
641 # 30-Jan-1997 Jarkko Hietaniemi <jhi@iki.fi>
643 # * Fixing the note on -DDEBUGGING.
645 # * Note on -O5 -fast.
650 # 26-Jan-1997 Jarkko Hietaniemi <jhi@iki.fi>
652 # * Notes on how to do both optimisation and debugging.
655 # 25-Jan-1997 Jarkko Hietaniemi <jhi@iki.fi>
657 # * Remove unneeded libraries from $libswanted: PW, bsd, c, dbm
659 # * Restructure the $lddlflags build.
661 # * $optimize based on which compiler we have.
666 # 23-Jan-1997 Achim Bohnet <ach@rosat.mpe-garching.mpg.de>
668 # * Added comments 'how to create a debugging version of perl'
670 # * Fixed logic of this script to prevent stripping of shared
671 # objects by the loader (see ld man page for -s) is debugging
672 # is set via the -g switch.
675 # 21-Jan-1997 Achim Bohnet <ach@rosat.mpe-garching.mpg.de>
677 # * now 'dl' is always removed from libswanted. Not only if
678 # optimize is an empty string.
681 # 17-Jan-1997 Achim Bohnet <ach@rosat.mpe-garching.mpg.de>
683 # * Removed 'dl' from libswanted: When the FreePort binary
684 # translator for Sun binaries is installed Configure concludes
685 # that it should use libdl.x.yz.fpx.so :-(
686 # Because the dlopen, dlclose,... calls are in the
687 # C library it not necessary at all to check for the
688 # dl library. Therefore dl is removed from libswanted.
691 # 1-Jan-1997 Achim Bohnet <ach@rosat.mpe-garching.mpg.de>
693 # * Set -Olimit to 3200 because perl_yylex.c got too big