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 # do NOT, I repeat, *NOT* take away the leading tabs
64 # Configure Black Magic (TM)
67 case "`$cc -v 2>&1 | grep cc`" in
68 *gcc*) _gcc_version=`$cc --version 2>&1 | tr . ' '`
70 if test "$1" -lt 2 -o \( "$1" -eq 2 -a \( "$2" -lt 95 -o \( "$2" -eq 95 -a "$3" -lt 2 \) \) \); then
73 *** Your cc seems to be gcc and its version ($_gcc_version) seems to be
74 *** less than 2.95.2. This is not a good idea since old versions of gcc
75 *** are known to produce buggy code when compiling Perl (and no doubt for
76 *** other programs, too).
78 *** Therefore, I strongly suggest upgrading your gcc. (Why don't you use
79 *** the vendor cc is also a good question. It comes with the operating
80 *** system and produces good code.)
82 Cannot continue, aborting.
87 if test "$1" -eq 2 -a "$2" -eq 95 -a "$3" -le 2; then
90 *** Note that as of gcc 2.95.2 (19991024) and Perl 5.6.0 (March 2000)
91 *** if the said Perl is compiled with the said gcc the lib/sdbm test
92 *** may dump core (meaning that the SDBM_File extension is unusable).
93 *** As this core dump never happens with the vendor cc, this is most
94 *** probably a lingering bug in gcc. Therefore unless you have a better
95 *** gcc installation you are still better off using the vendor cc.
97 Since you explicitly chose gcc, I assume that you know what are doing.
102 *) # compile something small: taint.c is fine for this.
103 ccversion=`cc -V | awk '/(Compaq|DEC) C/ {print $3}'`
104 # the main point is the '-v' flag of 'cc'.
105 case "`cc -v -I. -c taint.c -o taint$$.o 2>&1`" in
106 */gemc_cc*) # we have the new DEC GEM CC
109 *) # we have the old MIPS CC
118 # be nauseatingly ANSI
119 case "`$cc -v 2>&1 | grep gcc`" in
120 *gcc*) ccflags="$ccflags -ansi"
122 *) ccflags="$ccflags -std"
126 # for gcc the Configure knows about the -fpic:
127 # position-independent code for dynamic loading
129 # we want optimisation
132 '') case "`$cc -v 2>&1 | grep gcc`" in
135 *) case "$_DEC_cc_style" in
137 ccflags="$ccflags -fprm d -ieee"
139 old) optimize='-O2 -Olimit 3200' ;;
141 ccflags="$ccflags -D_INTRINSICS"
147 # Make glibpth agree with the compiler suite. Note that /shlib
148 # is not here. That's on purpose. Even though that's where libc
149 # really lives from V4.0 on, the linker (and /sbin/loader) won't
150 # look there by default. The sharable /sbin utilities were all
151 # built with "-Wl,-rpath,/shlib" to get around that. This makes
152 # no attempt to figure out the additional location(s) searched by
153 # gcc, since not all versions of gcc are easily coerced into
154 # revealing that information.
155 glibpth="/usr/shlib /usr/ccs/lib /usr/lib/cmplrs/cc"
156 glibpth="$glibpth /usr/lib /usr/local/lib /var/shlib"
158 # dlopen() is in libc
159 libswanted="`echo $libswanted | sed -e 's/ dl / /'`"
161 # libPW contains nothing useful for perl
162 libswanted="`echo $libswanted | sed -e 's/ PW / /'`"
164 # libnet contains nothing useful for perl here, and doesn't work
165 libswanted="`echo $libswanted | sed -e 's/ net / /'`"
167 # libbsd contains nothing used by perl that is not already in libc
168 libswanted="`echo $libswanted | sed -e 's/ bsd / /'`"
170 # libc need not be separately listed
171 libswanted="`echo $libswanted | sed -e 's/ c / /'`"
173 # ndbm is already in libc
174 libswanted="`echo $libswanted | sed -e 's/ ndbm / /'`"
176 # the basic lddlflags used always
177 lddlflags='-shared -expect_unresolved "*"'
179 # Fancy compiler suites use optimising linker as well as compiler.
180 # <spider@Orb.Nashua.NH.US>
182 *[123].*) # old loader
183 lddlflags="$lddlflags -O3"
185 *) if $test "X$optimize" = "X$undef"; then
186 lddlflags="$lddlflags -msym"
188 case "`/usr/sbin/sizer -v`" in
190 # QAR 56761: -O4 + .so may produce broken code,
191 # fixed in 4.0E or better.
194 lddlflags="$lddlflags $optimize"
197 # -msym: If using a sufficiently recent /sbin/loader,
198 # keep the module symbols with the modules.
199 lddlflags="$lddlflags -msym -std"
203 # Yes, the above loses if gcc does not use the system linker.
204 # If that happens, let me know about it. <jhi@iki.fi>
207 # If debugging or (old systems and doing shared)
208 # then do not strip the lib, otherwise, strip.
209 # As noted above the -DDEBUGGING is added automagically by Configure if -g.
211 *-g*) ;; # left intentionally blank
212 *) case "`uname -r`" in
214 case "$useshrplib" in
215 false|undef|'') lddlflags="$lddlflags -s" ;;
218 *) lddlflags="$lddlflags -s"
225 # Make embedding in things like INN and Apache more memory friendly.
226 # Keep it overridable on the Configure command line, though, so that
227 # "-Uuseshrplib" prevents this default.
230 case "$_DEC_cc_style.$useshrplib" in
231 new.) useshrplib="$define" ;;
234 # The EFF_ONLY_OK from <sys/access.h> is present but dysfunctional for
235 # [RWX]_OK as of Digital UNIX 4.0[A-D]?. If and when this gets fixed,
236 # please adjust this appropriately. See also pp_sys.c just before the
240 case "`/usr/sbin/sizer -v`" in
241 *5.0[A-Z]*|*5.[1-9]*|*[6-9].[0-9]*)
246 pp_sys_cflags='ccflags="$ccflags -DNO_EFF_ONLY_OK"'
250 # The off_t is already 8 bytes, so we do have largefileness.
252 cat > UU/usethreads.cbu <<'EOCBU'
253 # This script UU/usethreads.cbu will get 'called-back' by Configure
254 # after it has prompted the user for whether to use threads.
255 case "$usethreads" in
257 # Threads interfaces changed with V4.0.
258 case "`$cc -v 2>&1 | grep gcc`" in
259 *gcc*)ccflags="-D_REENTRANT $ccflags" ;;
260 *) case "`uname -r`" in
261 *[123].*) ccflags="-threads $ccflags" ;;
262 *) ccflags="-pthread $ccflags" ;;
267 *[123].*) libswanted="$libswanted pthreads mach exc c_r" ;;
268 *) libswanted="$libswanted pthread exc" ;;
271 case "$usemymalloc" in
280 cat > UU/uselongdouble.cbu <<'EOCBU'
281 # This script UU/uselongdouble.cbu will get 'called-back' by Configure
282 # after it has prompted the user for whether to use long doubles.
283 case "$uselongdouble" in
284 $define|true|[yY]*) d_Gconvert='sprintf((b),"%.*Lg",(n),(x))' ;;
289 # Unset temporary variables no more needed.
299 # September-1998 Jarkko Hietaniemi <jhi@iki.fi>
301 # * Added the -DNO_EFF_ONLY_OK flag ('use filetest;' support).
305 # 19-Dec-1997 Spider Boardman <spider@Orb.Nashua.NH.US>
307 # * Newer Digital UNIX compilers enforce signaling for NaN without
308 # -ieee. Added -fprm d at the same time since it's friendlier for
311 # * Fixed the library search path to match cc, ld, and /sbin/loader.
313 # * Default to building -Duseshrplib on newer systems. -Uuseshrplib
316 # * Fix -pthread additions for useshrplib. ld has no -pthread option.
321 # 19-Sep-1997 Spider Boardman <spider@Orb.Nashua.NH.US>
323 # * libnet on Digital UNIX is for JAVA, not for sockets.
328 # 22-Feb-1997 Jarkko Hietaniemi <jhi@iki.fi>
330 # * Restructuring Spider's suggestions.
332 # * Older Digital UNIXes cannot handle -Olimit ... for $lddlflags.
334 # * ld -s cannot be used in older Digital UNIXes when doing shared.
337 # 21-Feb-1997 Spider Boardman <spider@Orb.Nashua.NH.US>
341 # * -DSTANDARD_C removed.
343 # * -D_INTRINSICS added. (that -fast does not seem to buy much confirmed)
345 # * odbm not in libc, only ndbm. Therefore dbm back to $libswanted.
347 # * -msym for the newer runtime loaders.
349 # * $optimize also in $lddflags.
354 # 18-Feb-1997 Jarkko Hietaniemi <jhi@iki.fi>
356 # * unset _DEC_cc_style and more commentary on -std.
361 # 15-Feb-1997 Jarkko Hietaniemi <jhi@iki.fi>
368 # 30-Jan-1997 Jarkko Hietaniemi <jhi@iki.fi>
370 # * Fixing the note on -DDEBUGGING.
372 # * Note on -O5 -fast.
377 # 26-Jan-1997 Jarkko Hietaniemi <jhi@iki.fi>
379 # * Notes on how to do both optimisation and debugging.
382 # 25-Jan-1997 Jarkko Hietaniemi <jhi@iki.fi>
384 # * Remove unneeded libraries from $libswanted: PW, bsd, c, dbm
386 # * Restructure the $lddlflags build.
388 # * $optimize based on which compiler we have.
393 # 23-Jan-1997 Achim Bohnet <ach@rosat.mpe-garching.mpg.de>
395 # * Added comments 'how to create a debugging version of perl'
397 # * Fixed logic of this script to prevent stripping of shared
398 # objects by the loader (see ld man page for -s) is debugging
399 # is set via the -g switch.
402 # 21-Jan-1997 Achim Bohnet <ach@rosat.mpe-garching.mpg.de>
404 # * now 'dl' is always removed from libswanted. Not only if
405 # optimize is an empty string.
408 # 17-Jan-1997 Achim Bohnet <ach@rosat.mpe-garching.mpg.de>
410 # * Removed 'dl' from libswanted: When the FreePort binary
411 # translator for Sun binaries is installed Configure concludes
412 # that it should use libdl.x.yz.fpx.so :-(
413 # Because the dlopen, dlclose,... calls are in the
414 # C library it not necessary at all to check for the
415 # dl library. Therefore dl is removed from libswanted.
418 # 1-Jan-1997 Achim Bohnet <ach@rosat.mpe-garching.mpg.de>
420 # * Set -Olimit to 3200 because perl_yylex.c got too big