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 \( "$1" -eq 2 -a "$2" -lt 95 \); then
73 Your cc seems to be gcc and its version seems to be less than 2.95.
74 This is not a good idea since old versions of gcc are known to produce
75 buggy code when compiling Perl (and no doubt for other programs, too).
77 Therefore, I strongly suggest upgrading your gcc. (Why don't you
78 use the vendor cc is also a good question. It comes with the operating
79 system and produces good code.)
81 Note that as of gcc 2.95 (19990728) and Perl 5.6.0 (end of March 2000)
82 if the said Perl is compiled with the said gcc the lib/sdbm test will
83 dump core. As this doesn't happen with the vendor cc, this is
84 most probably a lingering bug in gcc. Therefore unless you have
85 a better gcc you are still better off using the vendor cc.
87 Cannot continue, aborting.
93 *) # compile something small: taint.c is fine for this.
94 # the main point is the '-v' flag of 'cc'.
95 case "`cc -v -I. -c taint.c -o taint$$.o 2>&1`" in
96 */gemc_cc*) # we have the new DEC GEM CC
99 *) # we have the old MIPS CC
108 # be nauseatingly ANSI
109 case "`$cc -v 2>&1 | grep gcc`" in
110 *gcc*) ccflags="$ccflags -ansi"
112 *) ccflags="$ccflags -std"
116 # for gcc the Configure knows about the -fpic:
117 # position-independent code for dynamic loading
119 # we want optimisation
122 '') case "`$cc -v 2>&1 | grep gcc`" in
125 *) case "$_DEC_cc_style" in
127 ccflags="$ccflags -fprm d -ieee"
129 old) optimize='-O2 -Olimit 3200' ;;
131 ccflags="$ccflags -D_INTRINSICS"
137 # Make glibpth agree with the compiler suite. Note that /shlib
138 # is not here. That's on purpose. Even though that's where libc
139 # really lives from V4.0 on, the linker (and /sbin/loader) won't
140 # look there by default. The sharable /sbin utilities were all
141 # built with "-Wl,-rpath,/shlib" to get around that. This makes
142 # no attempt to figure out the additional location(s) searched by
143 # gcc, since not all versions of gcc are easily coerced into
144 # revealing that information.
145 glibpth="/usr/shlib /usr/ccs/lib /usr/lib/cmplrs/cc"
146 glibpth="$glibpth /usr/lib /usr/local/lib /var/shlib"
148 # dlopen() is in libc
149 libswanted="`echo $libswanted | sed -e 's/ dl / /'`"
151 # libPW contains nothing useful for perl
152 libswanted="`echo $libswanted | sed -e 's/ PW / /'`"
154 # libnet contains nothing useful for perl here, and doesn't work
155 libswanted="`echo $libswanted | sed -e 's/ net / /'`"
157 # libbsd contains nothing used by perl that is not already in libc
158 libswanted="`echo $libswanted | sed -e 's/ bsd / /'`"
160 # libc need not be separately listed
161 libswanted="`echo $libswanted | sed -e 's/ c / /'`"
163 # ndbm is already in libc
164 libswanted="`echo $libswanted | sed -e 's/ ndbm / /'`"
166 # the basic lddlflags used always
167 lddlflags='-shared -expect_unresolved "*"'
169 # Fancy compiler suites use optimising linker as well as compiler.
170 # <spider@Orb.Nashua.NH.US>
172 *[123].*) # old loader
173 lddlflags="$lddlflags -O3"
175 *) if $test "X$optimize" = "X$undef"; then
176 lddlflags="$lddlflags -msym"
178 case "`/usr/sbin/sizer -v`" in
180 # QAR 56761: -O4 + .so may produce broken code,
181 # fixed in 4.0E or better.
184 lddlflags="$lddlflags $optimize"
187 # -msym: If using a sufficiently recent /sbin/loader,
188 # keep the module symbols with the modules.
189 lddlflags="$lddlflags -msym -std"
193 # Yes, the above loses if gcc does not use the system linker.
194 # If that happens, let me know about it. <jhi@iki.fi>
197 # If debugging or (old systems and doing shared)
198 # then do not strip the lib, otherwise, strip.
199 # As noted above the -DDEBUGGING is added automagically by Configure if -g.
201 *-g*) ;; # left intentionally blank
202 *) case "`uname -r`" in
204 case "$useshrplib" in
205 false|undef|'') lddlflags="$lddlflags -s" ;;
208 *) lddlflags="$lddlflags -s"
215 # Make embedding in things like INN and Apache more memory friendly.
216 # Keep it overridable on the Configure command line, though, so that
217 # "-Uuseshrplib" prevents this default.
220 case "$_DEC_cc_style.$useshrplib" in
221 new.) useshrplib="$define" ;;
224 # The EFF_ONLY_OK from <sys/access.h> is present but dysfunctional for
225 # [RWX]_OK as of Digital UNIX 4.0[A-D]?. If and when this gets fixed,
226 # please adjust this appropriately. See also pp_sys.c just before the
230 case "`/usr/sbin/sizer -v`" in
231 *5.0[A-Z]*|*5.[1-9]*|*[6-9].[0-9]*)
236 pp_sys_cflags='ccflags="$ccflags -DNO_EFF_ONLY_OK"'
240 # The off_t is already 8 bytes, so we do have largefileness.
242 cat > UU/usethreads.cbu <<'EOCBU'
243 # This script UU/usethreads.cbu will get 'called-back' by Configure
244 # after it has prompted the user for whether to use threads.
245 case "$usethreads" in
247 # Threads interfaces changed with V4.0.
248 case "`$cc -v 2>&1 | grep gcc`" in
249 *gcc*)ccflags="-D_REENTRANT $ccflags" ;;
250 *) case "`uname -r`" in
251 *[123].*) ccflags="-threads $ccflags" ;;
252 *) ccflags="-pthread $ccflags" ;;
257 *[123].*) libswanted="$libswanted pthreads mach exc c_r" ;;
258 *) libswanted="$libswanted pthread exc" ;;
261 case "$usemymalloc" in
270 cat > UU/uselongdouble.cbu <<'EOCBU'
271 # This script UU/uselongdouble.cbu will get 'called-back' by Configure
272 # after it has prompted the user for whether to use long doubles.
273 case "$uselongdouble" in
274 $define|true|[yY]*) d_Gconvert='sprintf((b),"%.*Lg",(n),(x))' ;;
279 # Unset temporary variables no more needed.
289 # September-1998 Jarkko Hietaniemi <jhi@iki.fi>
291 # * Added the -DNO_EFF_ONLY_OK flag ('use filetest;' support).
295 # 19-Dec-1997 Spider Boardman <spider@Orb.Nashua.NH.US>
297 # * Newer Digital UNIX compilers enforce signaling for NaN without
298 # -ieee. Added -fprm d at the same time since it's friendlier for
301 # * Fixed the library search path to match cc, ld, and /sbin/loader.
303 # * Default to building -Duseshrplib on newer systems. -Uuseshrplib
306 # * Fix -pthread additions for useshrplib. ld has no -pthread option.
311 # 19-Sep-1997 Spider Boardman <spider@Orb.Nashua.NH.US>
313 # * libnet on Digital UNIX is for JAVA, not for sockets.
318 # 22-Feb-1997 Jarkko Hietaniemi <jhi@iki.fi>
320 # * Restructuring Spider's suggestions.
322 # * Older Digital UNIXes cannot handle -Olimit ... for $lddlflags.
324 # * ld -s cannot be used in older Digital UNIXes when doing shared.
327 # 21-Feb-1997 Spider Boardman <spider@Orb.Nashua.NH.US>
331 # * -DSTANDARD_C removed.
333 # * -D_INTRINSICS added. (that -fast does not seem to buy much confirmed)
335 # * odbm not in libc, only ndbm. Therefore dbm back to $libswanted.
337 # * -msym for the newer runtime loaders.
339 # * $optimize also in $lddflags.
344 # 18-Feb-1997 Jarkko Hietaniemi <jhi@iki.fi>
346 # * unset _DEC_cc_style and more commentary on -std.
351 # 15-Feb-1997 Jarkko Hietaniemi <jhi@iki.fi>
358 # 30-Jan-1997 Jarkko Hietaniemi <jhi@iki.fi>
360 # * Fixing the note on -DDEBUGGING.
362 # * Note on -O5 -fast.
367 # 26-Jan-1997 Jarkko Hietaniemi <jhi@iki.fi>
369 # * Notes on how to do both optimisation and debugging.
372 # 25-Jan-1997 Jarkko Hietaniemi <jhi@iki.fi>
374 # * Remove unneeded libraries from $libswanted: PW, bsd, c, dbm
376 # * Restructure the $lddlflags build.
378 # * $optimize based on which compiler we have.
383 # 23-Jan-1997 Achim Bohnet <ach@rosat.mpe-garching.mpg.de>
385 # * Added comments 'how to create a debugging version of perl'
387 # * Fixed logic of this script to prevent stripping of shared
388 # objects by the loader (see ld man page for -s) is debugging
389 # is set via the -g switch.
392 # 21-Jan-1997 Achim Bohnet <ach@rosat.mpe-garching.mpg.de>
394 # * now 'dl' is always removed from libswanted. Not only if
395 # optimize is an empty string.
398 # 17-Jan-1997 Achim Bohnet <ach@rosat.mpe-garching.mpg.de>
400 # * Removed 'dl' from libswanted: When the FreePort binary
401 # translator for Sun binaries is installed Configure concludes
402 # that it should use libdl.x.yz.fpx.so :-(
403 # Because the dlopen, dlclose,... calls are in the
404 # C library it not necessary at all to check for the
405 # dl library. Therefore dl is removed from libswanted.
408 # 1-Jan-1997 Achim Bohnet <ach@rosat.mpe-garching.mpg.de>
410 # * Set -Olimit to 3200 because perl_yylex.c got too big