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 $3}' | grep '^V'`
152 # the main point is the '-v' flag of 'cc'.
153 case "`cc -v -c try.c 2>&1`" in
154 */gemc_cc*) # we have the new DEC GEM CC
157 *) # we have the old MIPS CC
161 # We need to figure out whether -c99 is a valid flag to use.
162 # If it is, we can use it for being nauseatingly C99 ANSI --
163 # but even then the lddlflags needs to stay -std1.
164 # If it is not, we must use -std1 for both flags.
166 case "`cc -c99 try.c 2>&1`" in
167 *"-c99: Unknown flag"*)
168 _ccflags_strict_ansi="-std1"
170 *) # However, use the -c99 only if compiling for
171 # -DPERL_MEM_LOG, where the C99 feature __func__
172 # is useful to have. Otherwise use the good old
173 # -std1 so that we stay C89 strict, which the goal
174 # of the Perl C code base (no //, no code between
175 # declarations, etc). Moreover, the Tru64 cc is
176 # not fully C99, and most probably never will be.
178 # The -DPERL_MEM_LOG can be either in ccflags
179 # (if using an old config.sh) or in the command line
180 # (which has been stowed away in UU/cmdline.opt).
182 case "$ccflags `cat UU/cmdline.opt`" in
183 *-DPERL_MEM_LOG*) _ccflags_strict_ansi="-c99" ;;
184 *) _ccflags_strict_ansi="-std1" ;;
188 _lddlflags_strict_ansi="-std1"
189 # -no_ansi_alias because Perl code is not that strict
190 # (also gcc uses by default -fno-strict-aliasing).
193 *5.*) _ccflags_strict_ansi="$_ccflags_strict_ansi -no_ansi_alias" ;;
200 # Be nauseatingly ANSI
201 ccflags="$ccflags $_ccflags_strict_ansi"
203 # g++ needs a lot of definitions to see the same set of
204 # prototypes from <unistd.h> et alia as cxx/cc see.
205 # Note that we cannot define _XOPEN_SOURCE_EXTENDED or
206 # its moral equivalent, _XOPEN_SOURCE=500 (which would
207 # define a lot of the required prototypes for us), because
208 # the gcc-processed version of <sys/wait.h> contains fatally
209 # conflicting prototypes for wait3(). The _SOCKADDR_LEN is
210 # needed to get struct sockaddr and struct sockaddr_in to align.
212 *g++*) ccflags="$ccflags -D_XOPEN_SOURCE -D_OSF_SOURCE -D_AES_SOURCE -D_BSD -D_POSIX_C_SOURCE=199309L -D_POSIX_PII_SOCKET -D_SOCKADDR_LEN" ;;
215 # for gcc the Configure knows about the -fpic:
216 # position-independent code for dynamic loading
218 # we want optimisation
222 gcc) optimize='-O3' ;;
223 *) case "$_DEC_cc_style" in
224 new) optimize='-O4' ;;
225 old) optimize='-O2 -Olimit 3200' ;;
227 ccflags="$ccflags -D_INTRINSICS"
235 *) case "$optimize" in
236 *-O*) # With both -O and -g, the -g must be -g3.
237 optimize="`echo $optimize | sed 's/-g[1-4]*/-g3/'`"
243 ## Optimization limits
245 gcc) # gcc 3.2.1 wants a lot of memory for -O3'ing toke.c
248 #include <sys/resource.h>
253 int i = getrlimit (RLIMIT_DATA, &rl);
254 printf ("%d\n", rl.rlim_cur / (1024 * 1024));
257 $cc -o try $ccflags $ldflags try.c
260 if [ $maxdsiz -lt 256 ]; then
261 # less than 256 MB is probably not enough to optimize toke.c with gcc -O3
264 Your process datasize is limited to $maxdsiz MB, which is (sadly) not
265 always enough to fully optimize some source code files of Perl,
266 at least 256 MB seems to be necessary as of Perl 5.8.0. I'll try to
267 use a lower optimization level for those parts. You could either try
268 using your shell's ulimit/limit/limits command to raise your datasize
269 (assuming the system-wide hard resource limits allow you to go higher),
270 or if you can't go higher and if you are a sysadmin, and you *do* want
271 the full optimization, you can tune the 'max_per_proc_data_size'
272 kernel parameter: see man sysconfigtab, and man sys_attrs_proc.
275 toke_cflags='optimize=-O2'
281 # http://public.activestate.com/cgi-bin/perlbrowse?patch=23787
282 # broke things for gcc (at least gcc 3.3) so that many of the pack()
283 # checksum tests for formats L, j, J, especially when combined
284 # with the < and > specifiers, started to fail if compiled with plain -O3.
287 pp_pack_cflags='optimize="-O3 -fno-cse-skip-blocks"'
291 # we want dynamic fp rounding mode, and we want ieee exception semantics
294 *) case "$_DEC_cc_style" in
295 new) ccflags="$ccflags -fprm d -ieee" ;;
300 # Make glibpth agree with the compiler suite. Note that /shlib
301 # is not here. That's on purpose. Even though that's where libc
302 # really lives from V4.0 on, the linker (and /sbin/loader) won't
303 # look there by default. The sharable /sbin utilities were all
304 # built with "-Wl,-rpath,/shlib" to get around that. This makes
305 # no attempt to figure out the additional location(s) searched by
306 # gcc, since not all versions of gcc are easily coerced into
307 # revealing that information.
308 glibpth="/usr/shlib /usr/ccs/lib /usr/lib/cmplrs/cc"
309 glibpth="$glibpth /usr/lib /usr/local/lib /var/shlib"
311 # dlopen() is in libc
312 libswanted="`echo $libswanted | sed -e 's/ dl / /'`"
314 # libPW contains nothing useful for perl
315 libswanted="`echo $libswanted | sed -e 's/ PW / /'`"
317 # libnet contains nothing useful for perl here, and doesn't work
318 libswanted="`echo $libswanted | sed -e 's/ net / /'`"
320 # libbsd contains nothing used by perl that is not already in libc
321 libswanted="`echo $libswanted | sed -e 's/ bsd / /'`"
323 # libc need not be separately listed
324 libswanted="`echo $libswanted | sed -e 's/ c / /'`"
326 # ndbm is already in libc
327 libswanted="`echo $libswanted | sed -e 's/ ndbm / /'`"
329 # the basic lddlflags used always
330 lddlflags='-shared -expect_unresolved "*"'
332 # If debugging or (old systems and doing shared)
333 # then do not strip the lib, otherwise, strip.
334 # As noted above the -DDEBUGGING is added automagically by Configure if -g.
336 *-g*) ;; # left intentionally blank
339 case "$useshrplib" in
340 false|undef|'') lddlflags="$lddlflags -s" ;;
343 *) lddlflags="$lddlflags -s"
350 # Make embedding in things like INN and Apache more memory friendly.
351 # Keep it overridable on the Configure command line, though, so that
352 # "-Uuseshrplib" prevents this default.
355 case "$_DEC_cc_style.$useshrplib" in
356 new.) useshrplib="$define" ;;
359 # The EFF_ONLY_OK from <sys/access.h> is present but dysfunctional for
360 # [RWX]_OK as of Digital UNIX 4.0[A-D]?. If and when this gets fixed,
361 # please adjust this appropriately. See also pp_sys.c just before the
366 *5.0[A-Z]*|*5.[1-9]*|*[6-9].[0-9]*)
371 pp_sys_cflags='ccflags="$ccflags -DNO_EFF_ONLY_OK"'
375 # The off_t is already 8 bytes, so we do have largefileness.
377 cat > UU/usethreads.cbu <<'EOCBU'
378 # This script UU/usethreads.cbu will get 'called-back' by Configure
379 # after it has prompted the user for whether to use threads.
380 case "$usethreads" in
382 # In Tru64 V5 (at least V5.1A, V5.1B) gcc (at least 3.2.2)
383 # cannot be used to compile a threaded Perl.
384 cat > pthread.c <<EOF
388 $cc -c pthread.c 2> pthread.err
389 if egrep -q "unrecognized compiler|syntax error" pthread.err; then
392 *** I'm sorry but your C compiler ($cc) cannot be used to
393 *** compile Perl with threads. The system C compiler should work.
396 Cannot continue, aborting.
403 # Threads interfaces changed with V4.0.
406 ccflags="-D_REENTRANT $ccflags"
409 *[123].*) ccflags="-threads $ccflags" ;;
410 *) ccflags="-pthread $ccflags" ;;
415 *[123].*) libswanted="$libswanted pthreads mach exc c_r" ;;
416 *) libswanted="$libswanted pthread exc" ;;
419 case "$usemymalloc" in
424 # These symbols are renamed in <time.h> so
425 # that the Configure hasproto doesn't see them.
426 d_asctime_r_proto="$define"
427 d_ctime_r_proto="$define"
428 d_gmtime_r_proto="$define"
429 d_localtime_r_proto="$define"
435 case "$usemallocwrap" in
436 '') usemallocwrap='define' ;;
439 cat > UU/uselongdouble.cbu <<'EOCBU'
440 # This script UU/uselongdouble.cbu will get 'called-back' by Configure
441 # after it has prompted the user for whether to use long doubles.
442 case "$uselongdouble" in
445 *[1-4].0*) cat >&4 <<EOF
448 *** Sorry, you cannot use long doubles in pre-V5.0 releases of Tru64.
451 Cannot continue, aborting.
457 # Test whether libc's been fixed yet for long doubles.
460 int main(int argc, char **argv)
462 unsigned long uvmax = ~0UL;
463 long double ld = uvmax + 0.0L;
464 char buf1[30], buf2[30];
466 (void) sprintf(buf1, "%lu", uvmax);
467 (void) sprintf(buf2, "%.0Lf", ld);
468 return strcmp(buf1, buf2) != 0;
471 # Don't bother trying to work with Configure's idea of
472 # cc and the various flags. This might not work as-is
473 # with gcc -- but we're testing libc, not the compiler.
474 if cc -o try $_ccflags_strict_ansi try.c && ./try
480 Warning! Your libc has not yet been patched so that its "%Lf" format for
481 printing long doubles shows all the significant digits. You will get errors
482 in the t/op/numconvert test because of this. (The data is still good
483 internally, and the "%e" format of printf() or sprintf() in perl will still
484 produce valid results.) See README.tru64 for additional details.
497 *[1-4].0*) d_modfl=undef ;; # must wait till 5.0
500 # Keep that leading tab.
501 old_LD_LIBRARY_PATH=$LD_LIBRARY_PATH
505 echo "Appending $p to LD_LIBRARY_PATH." >& 4
506 case "$LD_LIBRARY_PATH" in
507 '') LD_LIBRARY_PATH=$p ;;
508 *) LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$p ;;
512 case "$LD_LIBRARY_PATH" in
513 "$old_LD_LIBRARY_PATH") ;;
514 *) echo "LD_LIBRARY_PATH is now $LD_LIBRARY_PATH." >& 4 ;;
516 case "$LD_LIBRARY_PATH" in
518 * ) export LD_LIBRARY_PATH ;;
522 # Unset temporary variables no more needed.
532 # September-1998 Jarkko Hietaniemi <jhi@iki.fi>
534 # * Added the -DNO_EFF_ONLY_OK flag ('use filetest;' support).
538 # 19-Dec-1997 Spider Boardman <spider@Orb.Nashua.NH.US>
540 # * Newer Digital UNIX compilers enforce signaling for NaN without
541 # -ieee. Added -fprm d at the same time since it's friendlier for
544 # * Fixed the library search path to match cc, ld, and /sbin/loader.
546 # * Default to building -Duseshrplib on newer systems. -Uuseshrplib
549 # * Fix -pthread additions for useshrplib. ld has no -pthread option.
554 # 19-Sep-1997 Spider Boardman <spider@Orb.Nashua.NH.US>
556 # * libnet on Digital UNIX is for JAVA, not for sockets.
561 # 22-Feb-1997 Jarkko Hietaniemi <jhi@iki.fi>
563 # * Restructuring Spider's suggestions.
565 # * Older Digital UNIXes cannot handle -Olimit ... for $lddlflags.
567 # * ld -s cannot be used in older Digital UNIXes when doing shared.
570 # 21-Feb-1997 Spider Boardman <spider@Orb.Nashua.NH.US>
574 # * -DSTANDARD_C removed.
576 # * -D_INTRINSICS added. (that -fast does not seem to buy much confirmed)
578 # * odbm not in libc, only ndbm. Therefore dbm back to $libswanted.
580 # * -msym for the newer runtime loaders.
582 # * $optimize also in $lddflags.
587 # 18-Feb-1997 Jarkko Hietaniemi <jhi@iki.fi>
589 # * unset _DEC_cc_style and more commentary on -std.
594 # 15-Feb-1997 Jarkko Hietaniemi <jhi@iki.fi>
601 # 30-Jan-1997 Jarkko Hietaniemi <jhi@iki.fi>
603 # * Fixing the note on -DDEBUGGING.
605 # * Note on -O5 -fast.
610 # 26-Jan-1997 Jarkko Hietaniemi <jhi@iki.fi>
612 # * Notes on how to do both optimisation and debugging.
615 # 25-Jan-1997 Jarkko Hietaniemi <jhi@iki.fi>
617 # * Remove unneeded libraries from $libswanted: PW, bsd, c, dbm
619 # * Restructure the $lddlflags build.
621 # * $optimize based on which compiler we have.
626 # 23-Jan-1997 Achim Bohnet <ach@rosat.mpe-garching.mpg.de>
628 # * Added comments 'how to create a debugging version of perl'
630 # * Fixed logic of this script to prevent stripping of shared
631 # objects by the loader (see ld man page for -s) is debugging
632 # is set via the -g switch.
635 # 21-Jan-1997 Achim Bohnet <ach@rosat.mpe-garching.mpg.de>
637 # * now 'dl' is always removed from libswanted. Not only if
638 # optimize is an empty string.
641 # 17-Jan-1997 Achim Bohnet <ach@rosat.mpe-garching.mpg.de>
643 # * Removed 'dl' from libswanted: When the FreePort binary
644 # translator for Sun binaries is installed Configure concludes
645 # that it should use libdl.x.yz.fpx.so :-(
646 # Because the dlopen, dlclose,... calls are in the
647 # C library it not necessary at all to check for the
648 # dl library. Therefore dl is removed from libswanted.
651 # 1-Jan-1997 Achim Bohnet <ach@rosat.mpe-garching.mpg.de>
653 # * Set -Olimit to 3200 because perl_yylex.c got too big