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 case "`$cc -v 2>&1 | grep cc`" in
67 # do NOT, I repeat, *NOT* take away the leading tabs
68 # Configure Black Magic (TM)
72 gcc) if [ "X$gccversion" = "X" ]; then
73 # Done too late in Configure if hinted
74 gccversion=`$cc --version | sed 's/.*(GCC) *//'`
77 if test "$1" -lt 2 -o \( "$1" -eq 2 -a \( "$2" -lt 95 -o \( "$2" -eq 95 -a "$3" -lt 3 \) \) \); then
80 *** Your cc seems to be gcc and its version ($gccversion) seems to be
81 *** less than 2.95.3. This is not a good idea since old versions of gcc
82 *** are known to produce buggy code when compiling Perl (and no doubt for
83 *** other programs, too).
85 *** Therefore, I strongly suggest upgrading your gcc. (Why don't you use
86 *** the vendor cc is also a good question. It comes with the operating
87 *** system, produces good code, and is very ANSI C fastidious.)
89 Cannot continue, aborting.
94 if test "$1" -eq 2 -a "$2" -eq 95 -a "$3" -le 2; then
97 *** Note that as of gcc 2.95.2 (19991024) and Perl 5.6.0 (March 2000)
98 *** if the said Perl is compiled with the said gcc the lib/sdbm test
99 *** may dump core (meaning that the SDBM_File extension is unusable).
100 *** As this core dump never happens with the vendor cc, this is most
101 *** probably a lingering bug in gcc. Therefore unless you have a better
102 *** gcc installation you are still better off using the vendor cc.
104 Since you explicitly chose gcc, I assume that you know what are doing.
108 # -ansi is fine for gcc in Tru64 (-ansi is not universally so).
109 _ccflags_strict_ansi="-ansi"
111 *) # compile something.
113 int main() { return 0; }
115 ccversion=`cc -V | awk '/(Compaq|DEC) C/ {print $3}' | grep '^V'`
116 # the main point is the '-v' flag of 'cc'.
117 case "`cc -v -c try.c 2>&1`" in
118 */gemc_cc*) # we have the new DEC GEM CC
121 *) # we have the old MIPS CC
125 # We need to figure out whether -c99 is a valid flag to use.
126 # If it is, we can use it for being nauseatingly C99 ANSI --
127 # but even then the lddlflags needs to stay -std1.
128 # If it is not, we must use -std1 for both flags.
130 case "`cc -c99 try.c 2>&1`" in
131 *"-c99: Unknown flag"*)
132 _ccflags_strict_ansi="-std1"
134 *) # However, use the -c99 only if compiling for
135 # -DPERL_MEM_LOG, where the C99 feature __func__
136 # is useful to have. Otherwise use the good old
137 # -std1 so that we stay C89 strict, which the goal
138 # of the Perl C code base (no //, no code between
139 # declarations, etc). Moreover, the Tru64 cc is
140 # not fully C99, and most probably never will be.
142 # The -DPERL_MEM_LOG can be either in ccflags
143 # (if using an old config.sh) or in the command line
144 # (which has been stowed away in UU/cmdline.opt).
146 case "$ccflags `cat UU/cmdline.opt`" in
147 *-DPERL_MEM_LOG*) _ccflags_strict_ansi="-c99" ;;
148 *) _ccflags_strict_ansi="-std1" ;;
152 _lddlflags_strict_ansi="-std1"
153 # -no_ansi_alias because Perl code is not that strict
154 # (also gcc uses by default -fno-strict-aliasing).
155 _ccflags_strict_ansi="$_ccflags_strict_ansi -no_ansi_alias"
161 # Be nauseatingly ANSI
162 ccflags="$ccflags $_ccflags_strict_ansi"
164 # for gcc the Configure knows about the -fpic:
165 # position-independent code for dynamic loading
167 # we want optimisation
171 gcc) optimize='-O3' ;;
172 *) case "$_DEC_cc_style" in
173 new) optimize='-O4' ;;
174 old) optimize='-O2 -Olimit 3200' ;;
176 ccflags="$ccflags -D_INTRINSICS"
182 ## Optimization limits
184 gcc) # gcc 3.2.1 wants a lot of memory for -O3'ing toke.c
186 #include <sys/resource.h>
191 int i = getrlimit (RLIMIT_DATA, &rl);
192 printf ("%d\n", rl.rlim_cur / (1024 * 1024));
195 $cc -o try $ccflags $ldflags try.c
198 if [ $maxdsiz -lt 256 ]; then
199 # less than 256 MB is probably not enough to optimize toke.c with gcc -O3
202 Your process datasize is limited to $maxdsiz MB, which is (sadly) not
203 always enough to fully optimize some source code files of Perl,
204 at least 256 MB seems to be necessary as of Perl 5.8.0. I'll try to
205 use a lower optimization level for those parts. You could either try
206 using your shell's ulimit/limit/limits command to raise your datasize
207 (assuming the system-wide hard resource limits allow you to go higher),
208 or if you can't go higher and if you are a sysadmin, and you *do* want
209 the full optimization, you can tune the 'max_per_proc_data_size'
210 kernel parameter: see man sysconfigtab, and man sys_attrs_proc.
213 toke_cflags='optimize=-O2'
219 # http://public.activestate.com/cgi-bin/perlbrowse?patch=23787
220 # broke things for gcc (at least gcc 3.3) so that many of the pack()
221 # checksum tests for formats L, j, J, especially when combined
222 # with the < and > specifiers, started to fail if compiled with plain -O3.
225 pp_pack_cflags='optimize="-O3 -fno-cse-skip-blocks"'
229 # we want dynamic fp rounding mode, and we want ieee exception semantics
232 *) case "$_DEC_cc_style" in
233 new) ccflags="$ccflags -fprm d -ieee" ;;
238 # Make glibpth agree with the compiler suite. Note that /shlib
239 # is not here. That's on purpose. Even though that's where libc
240 # really lives from V4.0 on, the linker (and /sbin/loader) won't
241 # look there by default. The sharable /sbin utilities were all
242 # built with "-Wl,-rpath,/shlib" to get around that. This makes
243 # no attempt to figure out the additional location(s) searched by
244 # gcc, since not all versions of gcc are easily coerced into
245 # revealing that information.
246 glibpth="/usr/shlib /usr/ccs/lib /usr/lib/cmplrs/cc"
247 glibpth="$glibpth /usr/lib /usr/local/lib /var/shlib"
249 # dlopen() is in libc
250 libswanted="`echo $libswanted | sed -e 's/ dl / /'`"
252 # libPW contains nothing useful for perl
253 libswanted="`echo $libswanted | sed -e 's/ PW / /'`"
255 # libnet contains nothing useful for perl here, and doesn't work
256 libswanted="`echo $libswanted | sed -e 's/ net / /'`"
258 # libbsd contains nothing used by perl that is not already in libc
259 libswanted="`echo $libswanted | sed -e 's/ bsd / /'`"
261 # libc need not be separately listed
262 libswanted="`echo $libswanted | sed -e 's/ c / /'`"
264 # ndbm is already in libc
265 libswanted="`echo $libswanted | sed -e 's/ ndbm / /'`"
267 # the basic lddlflags used always
268 lddlflags='-shared -expect_unresolved "*"'
270 # Intentional leading tab.
271 myosvers="`/usr/sbin/sizer -v 2>/dev/null || uname -r`"
273 # Fancy compiler suites use optimising linker as well as compiler.
274 # <spider@Orb.Nashua.NH.US>
276 *[123].*) # old loader
277 lddlflags="$lddlflags -O3"
279 *) if $test "X$optimize" = "X$undef"; then
280 lddlflags="$lddlflags -msym"
284 # QAR 56761: -O4 + .so may produce broken code,
285 # fixed in 4.0E or better.
288 lddlflags="$lddlflags $optimize"
291 # -msym: If using a sufficiently recent /sbin/loader,
292 # keep the module symbols with the modules.
293 lddlflags="$lddlflags -msym $_lddlflags_strict_ansi"
297 # Yes, the above loses if gcc does not use the system linker.
298 # If that happens, let me know about it. <jhi@iki.fi>
300 # Because there is no other handy way to recognize 3.X.
302 *3.*) ccflags="$ccflags -DDEC_OSF1_3_X" ;;
305 # If debugging or (old systems and doing shared)
306 # then do not strip the lib, otherwise, strip.
307 # As noted above the -DDEBUGGING is added automagically by Configure if -g.
309 *-g*) ;; # left intentionally blank
310 *) case "`uname -r`" in
312 case "$useshrplib" in
313 false|undef|'') lddlflags="$lddlflags -s" ;;
316 *) lddlflags="$lddlflags -s"
323 # Make embedding in things like INN and Apache more memory friendly.
324 # Keep it overridable on the Configure command line, though, so that
325 # "-Uuseshrplib" prevents this default.
328 case "$_DEC_cc_style.$useshrplib" in
329 new.) useshrplib="$define" ;;
332 # The EFF_ONLY_OK from <sys/access.h> is present but dysfunctional for
333 # [RWX]_OK as of Digital UNIX 4.0[A-D]?. If and when this gets fixed,
334 # please adjust this appropriately. See also pp_sys.c just before the
339 *5.0[A-Z]*|*5.[1-9]*|*[6-9].[0-9]*)
344 pp_sys_cflags='ccflags="$ccflags -DNO_EFF_ONLY_OK"'
348 # The off_t is already 8 bytes, so we do have largefileness.
350 cat > UU/usethreads.cbu <<'EOCBU'
351 # This script UU/usethreads.cbu will get 'called-back' by Configure
352 # after it has prompted the user for whether to use threads.
353 case "$usethreads" in
355 # In Tru64 V5 (at least V5.1A, V5.1B) gcc (at least 3.2.2)
356 # cannot be used to compile a threaded Perl.
357 cat > pthread.c <<EOF
361 $cc -c pthread.c 2> pthread.err
362 if grep -q "unrecognized compiler" pthread.err; then
365 *** I'm sorry but your C compiler ($cc) cannot be used to
366 *** compile Perl with threads. The system C compiler should work.
369 Cannot continue, aborting.
376 # Threads interfaces changed with V4.0.
379 ccflags="-D_REENTRANT $ccflags"
381 *) case "`uname -r`" in
382 *[123].*) ccflags="-threads $ccflags" ;;
383 *) ccflags="-pthread $ccflags" ;;
388 *[123].*) libswanted="$libswanted pthreads mach exc c_r" ;;
389 *) libswanted="$libswanted pthread exc" ;;
392 case "$usemymalloc" in
397 # These symbols are renamed in <time.h> so
398 # that the Configure hasproto doesn't see them.
399 d_asctime_r_proto="$define"
400 d_ctime_r_proto="$define"
401 d_gmtime_r_proto="$define"
402 d_localtime_r_proto="$define"
408 case "$usemallocwrap" in
409 '') usemallocwrap='define' ;;
412 cat > UU/uselongdouble.cbu <<'EOCBU'
413 # This script UU/uselongdouble.cbu will get 'called-back' by Configure
414 # after it has prompted the user for whether to use long doubles.
415 case "$uselongdouble" in
418 *[1-4].0*) cat >&4 <<EOF
421 *** Sorry, you cannot use long doubles in pre-V5.0 releases of Tru64.
424 Cannot continue, aborting.
430 # Test whether libc's been fixed yet for long doubles.
433 int main(int argc, char **argv)
435 unsigned long uvmax = ~0UL;
436 long double ld = uvmax + 0.0L;
437 char buf1[30], buf2[30];
439 (void) sprintf(buf1, "%lu", uvmax);
440 (void) sprintf(buf2, "%.0Lf", ld);
441 return strcmp(buf1, buf2) != 0;
444 # Don't bother trying to work with Configure's idea of
445 # cc and the various flags. This might not work as-is
446 # with gcc -- but we're testing libc, not the compiler.
447 if cc -o try $_ccflags_strict_ansi try.c && ./try
453 Warning! Your libc has not yet been patched so that its "%Lf" format for
454 printing long doubles shows all the significant digits. You will get errors
455 in the t/op/numconvert test because of this. (The data is still good
456 internally, and the "%e" format of printf() or sprintf() in perl will still
457 produce valid results.) See README.tru64 for additional details.
470 *[1-4].0*) d_modfl=undef ;; # must wait till 5.0
473 # Keep that leading tab.
474 old_LD_LIBRARY_PATH=$LD_LIBRARY_PATH
478 echo "Appending $p to LD_LIBRARY_PATH." >& 4
479 case "$LD_LIBRARY_PATH" in
480 '') LD_LIBRARY_PATH=$p ;;
481 *) LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$p ;;
485 case "$LD_LIBRARY_PATH" in
486 "$old_LD_LIBRARY_PATH") ;;
487 *) echo "LD_LIBRARY_PATH is now $LD_LIBRARY_PATH." >& 4 ;;
489 case "$LD_LIBRARY_PATH" in
491 * ) export LD_LIBRARY_PATH ;;
495 # Unset temporary variables no more needed.
505 # September-1998 Jarkko Hietaniemi <jhi@iki.fi>
507 # * Added the -DNO_EFF_ONLY_OK flag ('use filetest;' support).
511 # 19-Dec-1997 Spider Boardman <spider@Orb.Nashua.NH.US>
513 # * Newer Digital UNIX compilers enforce signaling for NaN without
514 # -ieee. Added -fprm d at the same time since it's friendlier for
517 # * Fixed the library search path to match cc, ld, and /sbin/loader.
519 # * Default to building -Duseshrplib on newer systems. -Uuseshrplib
522 # * Fix -pthread additions for useshrplib. ld has no -pthread option.
527 # 19-Sep-1997 Spider Boardman <spider@Orb.Nashua.NH.US>
529 # * libnet on Digital UNIX is for JAVA, not for sockets.
534 # 22-Feb-1997 Jarkko Hietaniemi <jhi@iki.fi>
536 # * Restructuring Spider's suggestions.
538 # * Older Digital UNIXes cannot handle -Olimit ... for $lddlflags.
540 # * ld -s cannot be used in older Digital UNIXes when doing shared.
543 # 21-Feb-1997 Spider Boardman <spider@Orb.Nashua.NH.US>
547 # * -DSTANDARD_C removed.
549 # * -D_INTRINSICS added. (that -fast does not seem to buy much confirmed)
551 # * odbm not in libc, only ndbm. Therefore dbm back to $libswanted.
553 # * -msym for the newer runtime loaders.
555 # * $optimize also in $lddflags.
560 # 18-Feb-1997 Jarkko Hietaniemi <jhi@iki.fi>
562 # * unset _DEC_cc_style and more commentary on -std.
567 # 15-Feb-1997 Jarkko Hietaniemi <jhi@iki.fi>
574 # 30-Jan-1997 Jarkko Hietaniemi <jhi@iki.fi>
576 # * Fixing the note on -DDEBUGGING.
578 # * Note on -O5 -fast.
583 # 26-Jan-1997 Jarkko Hietaniemi <jhi@iki.fi>
585 # * Notes on how to do both optimisation and debugging.
588 # 25-Jan-1997 Jarkko Hietaniemi <jhi@iki.fi>
590 # * Remove unneeded libraries from $libswanted: PW, bsd, c, dbm
592 # * Restructure the $lddlflags build.
594 # * $optimize based on which compiler we have.
599 # 23-Jan-1997 Achim Bohnet <ach@rosat.mpe-garching.mpg.de>
601 # * Added comments 'how to create a debugging version of perl'
603 # * Fixed logic of this script to prevent stripping of shared
604 # objects by the loader (see ld man page for -s) is debugging
605 # is set via the -g switch.
608 # 21-Jan-1997 Achim Bohnet <ach@rosat.mpe-garching.mpg.de>
610 # * now 'dl' is always removed from libswanted. Not only if
611 # optimize is an empty string.
614 # 17-Jan-1997 Achim Bohnet <ach@rosat.mpe-garching.mpg.de>
616 # * Removed 'dl' from libswanted: When the FreePort binary
617 # translator for Sun binaries is installed Configure concludes
618 # that it should use libdl.x.yz.fpx.so :-(
619 # Because the dlopen, dlclose,... calls are in the
620 # C library it not necessary at all to check for the
621 # dl library. Therefore dl is removed from libswanted.
624 # 1-Jan-1997 Achim Bohnet <ach@rosat.mpe-garching.mpg.de>
626 # * Set -Olimit to 3200 because perl_yylex.c got too big