| 1 | # hints/dec_osf.sh |
| 2 | |
| 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": |
| 7 | # |
| 8 | #optimize=-g2 |
| 9 | # |
| 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. |
| 12 | # |
| 13 | # * gcc can always have both -g and optimisation on. |
| 14 | # |
| 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. |
| 21 | # |
| 22 | # * Configure will automatically add the often quoted |
| 23 | # -DDEBUGGING for you if the -g is specified. |
| 24 | # |
| 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. |
| 33 | # |
| 34 | # * The -std is needed because the following compiled |
| 35 | # without the -std and linked with -lm |
| 36 | # |
| 37 | # #include <math.h> |
| 38 | # #include <stdio.h> |
| 39 | # int main(){short x=10,y=sqrt(x);printf("%d\n",y);} |
| 40 | # |
| 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. |
| 44 | # |
| 45 | # * Compilation warnings like: |
| 46 | # |
| 47 | # "Undefined the ANSI standard macro ..." |
| 48 | # |
| 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). |
| 52 | # |
| 53 | |
| 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. |
| 60 | |
| 61 | cc=${cc:-cc} |
| 62 | |
| 63 | # do NOT, I repeat, *NOT* take away the leading tabs |
| 64 | # Configure Black Magic (TM) |
| 65 | # reset |
| 66 | _DEC_cc_style= |
| 67 | case "`$cc -v 2>&1 | grep cc`" in |
| 68 | *gcc*) _gcc_version=`$cc --version 2>&1 | tr . ' '` |
| 69 | set $_gcc_version |
| 70 | if test "$1" -lt 2 -o \( "$1" -eq 2 -a \( "$2" -lt 95 -o \( "$2" -eq 95 -a "$3" -lt 2 \) \) \); then |
| 71 | cat >&4 <<EOF |
| 72 | |
| 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). |
| 77 | *** |
| 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.) |
| 81 | |
| 82 | Cannot continue, aborting. |
| 83 | |
| 84 | EOF |
| 85 | exit 1 |
| 86 | fi |
| 87 | if test "$1" -eq 2 -a "$2" -eq 95 -a "$3" -le 2; then |
| 88 | cat >&4 <<EOF |
| 89 | |
| 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. |
| 96 | |
| 97 | Since you explicitly chose gcc, I assume that you know what are doing. |
| 98 | |
| 99 | EOF |
| 100 | fi |
| 101 | ;; |
| 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$$.o 2>&1`" in |
| 106 | */gemc_cc*) # we have the new DEC GEM CC |
| 107 | _DEC_cc_style=new |
| 108 | ;; |
| 109 | *) # we have the old MIPS CC |
| 110 | _DEC_cc_style=old |
| 111 | ;; |
| 112 | esac |
| 113 | # cleanup |
| 114 | rm -f taint$$.o |
| 115 | ;; |
| 116 | esac |
| 117 | |
| 118 | # be nauseatingly ANSI |
| 119 | case "`$cc -v 2>&1 | grep gcc`" in |
| 120 | *gcc*) ccflags="$ccflags -ansi" |
| 121 | ;; |
| 122 | *) ccflags="$ccflags -std" |
| 123 | ;; |
| 124 | esac |
| 125 | |
| 126 | # for gcc the Configure knows about the -fpic: |
| 127 | # position-independent code for dynamic loading |
| 128 | |
| 129 | # we want optimisation |
| 130 | |
| 131 | case "$optimize" in |
| 132 | '') case "`$cc -v 2>&1 | grep gcc`" in |
| 133 | *gcc*) |
| 134 | optimize='-O3' ;; |
| 135 | *) case "$_DEC_cc_style" in |
| 136 | new) optimize='-O4' |
| 137 | ccflags="$ccflags -fprm d -ieee" |
| 138 | ;; |
| 139 | old) optimize='-O2 -Olimit 3200' ;; |
| 140 | esac |
| 141 | ccflags="$ccflags -D_INTRINSICS" |
| 142 | ;; |
| 143 | esac |
| 144 | ;; |
| 145 | esac |
| 146 | |
| 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" |
| 157 | |
| 158 | # dlopen() is in libc |
| 159 | libswanted="`echo $libswanted | sed -e 's/ dl / /'`" |
| 160 | |
| 161 | # libPW contains nothing useful for perl |
| 162 | libswanted="`echo $libswanted | sed -e 's/ PW / /'`" |
| 163 | |
| 164 | # libnet contains nothing useful for perl here, and doesn't work |
| 165 | libswanted="`echo $libswanted | sed -e 's/ net / /'`" |
| 166 | |
| 167 | # libbsd contains nothing used by perl that is not already in libc |
| 168 | libswanted="`echo $libswanted | sed -e 's/ bsd / /'`" |
| 169 | |
| 170 | # libc need not be separately listed |
| 171 | libswanted="`echo $libswanted | sed -e 's/ c / /'`" |
| 172 | |
| 173 | # ndbm is already in libc |
| 174 | libswanted="`echo $libswanted | sed -e 's/ ndbm / /'`" |
| 175 | |
| 176 | # the basic lddlflags used always |
| 177 | lddlflags='-shared -expect_unresolved "*"' |
| 178 | |
| 179 | # Fancy compiler suites use optimising linker as well as compiler. |
| 180 | # <spider@Orb.Nashua.NH.US> |
| 181 | case "`uname -r`" in |
| 182 | *[123].*) # old loader |
| 183 | lddlflags="$lddlflags -O3" |
| 184 | ;; |
| 185 | *) if $test "X$optimize" = "X$undef"; then |
| 186 | lddlflags="$lddlflags -msym" |
| 187 | else |
| 188 | case "`/usr/sbin/sizer -v`" in |
| 189 | *4.0D*) |
| 190 | # QAR 56761: -O4 + .so may produce broken code, |
| 191 | # fixed in 4.0E or better. |
| 192 | ;; |
| 193 | *) |
| 194 | lddlflags="$lddlflags $optimize" |
| 195 | ;; |
| 196 | esac |
| 197 | # -msym: If using a sufficiently recent /sbin/loader, |
| 198 | # keep the module symbols with the modules. |
| 199 | lddlflags="$lddlflags -msym -std" |
| 200 | fi |
| 201 | ;; |
| 202 | esac |
| 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> |
| 205 | |
| 206 | |
| 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. |
| 210 | case "$optimize" in |
| 211 | *-g*) ;; # left intentionally blank |
| 212 | *) case "`uname -r`" in |
| 213 | *[123].*) |
| 214 | case "$useshrplib" in |
| 215 | false|undef|'') lddlflags="$lddlflags -s" ;; |
| 216 | esac |
| 217 | ;; |
| 218 | *) lddlflags="$lddlflags -s" |
| 219 | ;; |
| 220 | esac |
| 221 | ;; |
| 222 | esac |
| 223 | |
| 224 | # |
| 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. |
| 228 | # |
| 229 | |
| 230 | case "$_DEC_cc_style.$useshrplib" in |
| 231 | new.) useshrplib="$define" ;; |
| 232 | esac |
| 233 | |
| 234 | # The EFF_ONLY_OK from <sys/access.h> is present but dysfunctional for |
| 235 | # [RWX]_OK as of Digital UNIX 4.0[A-D]?. If and when this gets fixed, |
| 236 | # please adjust this appropriately. See also pp_sys.c just before the |
| 237 | # emulate_eaccess(). |
| 238 | |
| 239 | # Fixed in V5.0A. |
| 240 | case "`/usr/sbin/sizer -v`" in |
| 241 | *5.0[A-Z]*|*5.[1-9]*|*[6-9].[0-9]*) |
| 242 | : ok |
| 243 | ;; |
| 244 | *) |
| 245 | # V5.0 or previous |
| 246 | pp_sys_cflags='ccflags="$ccflags -DNO_EFF_ONLY_OK"' |
| 247 | ;; |
| 248 | esac |
| 249 | |
| 250 | # The off_t is already 8 bytes, so we do have largefileness. |
| 251 | |
| 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 |
| 256 | $define|true|[yY]*) |
| 257 | # Threads interfaces changed with V4.0. |
| 258 | case "`$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 $ccflags" ;; |
| 263 | esac |
| 264 | ;; |
| 265 | esac |
| 266 | case "`uname -r`" in |
| 267 | *[123].*) libswanted="$libswanted pthreads mach exc c_r" ;; |
| 268 | *) libswanted="$libswanted pthread exc" ;; |
| 269 | esac |
| 270 | |
| 271 | case "$usemymalloc" in |
| 272 | '') |
| 273 | usemymalloc='n' |
| 274 | ;; |
| 275 | esac |
| 276 | ;; |
| 277 | esac |
| 278 | EOCBU |
| 279 | |
| 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))' ;; |
| 285 | esac |
| 286 | EOCBU |
| 287 | |
| 288 | # |
| 289 | # Unset temporary variables no more needed. |
| 290 | # |
| 291 | |
| 292 | unset _DEC_cc_style |
| 293 | |
| 294 | # |
| 295 | # History: |
| 296 | # |
| 297 | # perl5.005_51: |
| 298 | # |
| 299 | # September-1998 Jarkko Hietaniemi <jhi@iki.fi> |
| 300 | # |
| 301 | # * Added the -DNO_EFF_ONLY_OK flag ('use filetest;' support). |
| 302 | # |
| 303 | # perl5.004_57: |
| 304 | # |
| 305 | # 19-Dec-1997 Spider Boardman <spider@Orb.Nashua.NH.US> |
| 306 | # |
| 307 | # * Newer Digital UNIX compilers enforce signaling for NaN without |
| 308 | # -ieee. Added -fprm d at the same time since it's friendlier for |
| 309 | # embedding. |
| 310 | # |
| 311 | # * Fixed the library search path to match cc, ld, and /sbin/loader. |
| 312 | # |
| 313 | # * Default to building -Duseshrplib on newer systems. -Uuseshrplib |
| 314 | # still overrides. |
| 315 | # |
| 316 | # * Fix -pthread additions for useshrplib. ld has no -pthread option. |
| 317 | # |
| 318 | # |
| 319 | # perl5.004_04: |
| 320 | # |
| 321 | # 19-Sep-1997 Spider Boardman <spider@Orb.Nashua.NH.US> |
| 322 | # |
| 323 | # * libnet on Digital UNIX is for JAVA, not for sockets. |
| 324 | # |
| 325 | # |
| 326 | # perl5.003_28: |
| 327 | # |
| 328 | # 22-Feb-1997 Jarkko Hietaniemi <jhi@iki.fi> |
| 329 | # |
| 330 | # * Restructuring Spider's suggestions. |
| 331 | # |
| 332 | # * Older Digital UNIXes cannot handle -Olimit ... for $lddlflags. |
| 333 | # |
| 334 | # * ld -s cannot be used in older Digital UNIXes when doing shared. |
| 335 | # |
| 336 | # |
| 337 | # 21-Feb-1997 Spider Boardman <spider@Orb.Nashua.NH.US> |
| 338 | # |
| 339 | # * -hidden removed. |
| 340 | # |
| 341 | # * -DSTANDARD_C removed. |
| 342 | # |
| 343 | # * -D_INTRINSICS added. (that -fast does not seem to buy much confirmed) |
| 344 | # |
| 345 | # * odbm not in libc, only ndbm. Therefore dbm back to $libswanted. |
| 346 | # |
| 347 | # * -msym for the newer runtime loaders. |
| 348 | # |
| 349 | # * $optimize also in $lddflags. |
| 350 | # |
| 351 | # |
| 352 | # perl5.003_27: |
| 353 | # |
| 354 | # 18-Feb-1997 Jarkko Hietaniemi <jhi@iki.fi> |
| 355 | # |
| 356 | # * unset _DEC_cc_style and more commentary on -std. |
| 357 | # |
| 358 | # |
| 359 | # perl5.003_26: |
| 360 | # |
| 361 | # 15-Feb-1997 Jarkko Hietaniemi <jhi@iki.fi> |
| 362 | # |
| 363 | # * -std and -ansi. |
| 364 | # |
| 365 | # |
| 366 | # perl5.003_24: |
| 367 | # |
| 368 | # 30-Jan-1997 Jarkko Hietaniemi <jhi@iki.fi> |
| 369 | # |
| 370 | # * Fixing the note on -DDEBUGGING. |
| 371 | # |
| 372 | # * Note on -O5 -fast. |
| 373 | # |
| 374 | # |
| 375 | # perl5.003_23: |
| 376 | # |
| 377 | # 26-Jan-1997 Jarkko Hietaniemi <jhi@iki.fi> |
| 378 | # |
| 379 | # * Notes on how to do both optimisation and debugging. |
| 380 | # |
| 381 | # |
| 382 | # 25-Jan-1997 Jarkko Hietaniemi <jhi@iki.fi> |
| 383 | # |
| 384 | # * Remove unneeded libraries from $libswanted: PW, bsd, c, dbm |
| 385 | # |
| 386 | # * Restructure the $lddlflags build. |
| 387 | # |
| 388 | # * $optimize based on which compiler we have. |
| 389 | # |
| 390 | # |
| 391 | # perl5.003_22: |
| 392 | # |
| 393 | # 23-Jan-1997 Achim Bohnet <ach@rosat.mpe-garching.mpg.de> |
| 394 | # |
| 395 | # * Added comments 'how to create a debugging version of perl' |
| 396 | # |
| 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. |
| 400 | # |
| 401 | # |
| 402 | # 21-Jan-1997 Achim Bohnet <ach@rosat.mpe-garching.mpg.de> |
| 403 | # |
| 404 | # * now 'dl' is always removed from libswanted. Not only if |
| 405 | # optimize is an empty string. |
| 406 | # |
| 407 | # |
| 408 | # 17-Jan-1997 Achim Bohnet <ach@rosat.mpe-garching.mpg.de> |
| 409 | # |
| 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. |
| 416 | # |
| 417 | # |
| 418 | # 1-Jan-1997 Achim Bohnet <ach@rosat.mpe-garching.mpg.de> |
| 419 | # |
| 420 | # * Set -Olimit to 3200 because perl_yylex.c got too big |
| 421 | # for the optimizer. |
| 422 | # |