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1 | # hints/dec_osf.sh |
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2 | |
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3 | # * If you want to debug perl or want to send a |
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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 | # |
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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 | # |
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13 | # * gcc can always have both -g and optimisation on. |
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14 | # |
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15 | # * debugging optimised code, no matter what compiler |
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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 | # |
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22 | # * Configure will automatically add the often quoted |
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23 | # -DDEBUGGING for you if the -g is specified. |
24 | # |
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25 | # * There is even more optimisation available in the new |
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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. |
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33 | # |
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34 | # * The -std is needed because the following compiled |
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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 | # |
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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 | # |
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53 | |
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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 | |
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61 | # do NOT, I repeat, *NOT* take away those leading tabs |
62 | # reset |
63 | _DEC_uname_r= |
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64 | _DEC_cc_style= |
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65 | # set |
66 | _DEC_uname_r=`uname -r` |
67 | # _DEC_cc_style set soon below |
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68 | # Configure Black Magic (TM) |
69 | |
70 | case "$cc" in |
71 | *gcc*) ;; # pass |
72 | *) # compile something small: taint.c is fine for this. |
73 | # the main point is the '-v' flag of 'cc'. |
74 | case "`cc -v -I. -c taint.c -o /tmp/taint$$.o 2>&1`" in |
75 | */gemc_cc*) # we have the new DEC GEM CC |
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76 | _DEC_cc_style=new |
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77 | ;; |
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78 | *) # we have the old MIPS CC |
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79 | _DEC_cc_style=old |
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80 | ;; |
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81 | esac |
82 | # cleanup |
83 | rm -f /tmp/taint$$.o |
84 | ;; |
85 | esac |
86 | |
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87 | # be nauseatingly ANSI |
88 | case "$cc" in |
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89 | *gcc*) ccflags="$ccflags -ansi" |
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90 | ;; |
91 | *) ccflags="$ccflags -std" |
92 | ;; |
93 | esac |
94 | |
95 | # for gcc the Configure knows about the -fpic: |
96 | # position-independent code for dynamic loading |
97 | |
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98 | # we want optimisation |
99 | |
100 | case "$optimize" in |
101 | '') case "$cc" in |
102 | *gcc*) |
103 | optimize='-O3' ;; |
104 | *) case "$_DEC_cc_style" in |
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105 | new) optimize='-O4' |
106 | ccflags="$ccflags -fprm d -ieee" |
107 | ;; |
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108 | old) optimize='-O2 -Olimit 3200' ;; |
109 | esac |
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110 | ccflags="$ccflags -D_INTRINSICS" |
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111 | ;; |
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112 | esac |
113 | ;; |
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114 | esac |
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115 | |
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116 | # Make glibpth agree with the compiler suite. Note that /shlib |
117 | # is not here. That's on purpose. Even though that's where libc |
118 | # really lives from V4.0 on, the linker (and /sbin/loader) won't |
119 | # look there by default. The sharable /sbin utilities were all |
120 | # built with "-Wl,-rpath,/shlib" to get around that. This makes |
121 | # no attempt to figure out the additional location(s) searched by |
122 | # gcc, since not all versions of gcc are easily coerced into |
123 | # revealing that information. |
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124 | glibpth="/usr/shlib /usr/ccs/lib /usr/lib/cmplrs/cc" |
125 | glibpth="$glibpth /usr/lib /usr/local/lib /var/shlib" |
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126 | |
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127 | # dlopen() is in libc |
128 | libswanted="`echo $libswanted | sed -e 's/ dl / /'`" |
129 | |
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130 | # libPW contains nothing useful for perl |
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131 | libswanted="`echo $libswanted | sed -e 's/ PW / /'`" |
132 | |
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133 | # libnet contains nothing useful for perl here, and doesn't work |
134 | libswanted="`echo $libswanted | sed -e 's/ net / /'`" |
135 | |
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136 | # libbsd contains nothing used by perl that is not already in libc |
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137 | libswanted="`echo $libswanted | sed -e 's/ bsd / /'`" |
138 | |
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139 | # libc need not be separately listed |
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140 | libswanted="`echo $libswanted | sed -e 's/ c / /'`" |
141 | |
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142 | # ndbm is already in libc |
143 | libswanted="`echo $libswanted | sed -e 's/ ndbm / /'`" |
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144 | |
145 | # the basic lddlflags used always |
146 | lddlflags='-shared -expect_unresolved "*"' |
147 | |
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148 | # Fancy compiler suites use optimising linker as well as compiler. |
149 | # <spider@Orb.Nashua.NH.US> |
150 | case "$_DEC_uname_r" in |
151 | *[123].*) # old loader |
152 | lddlflags="$lddlflags -O3" |
153 | ;; |
154 | *) lddlflags="$lddlflags $optimize -msym" |
155 | # -msym: If using a sufficiently recent /sbin/loader, |
156 | # keep the module symbols with the modules. |
157 | ;; |
158 | esac |
159 | # Yes, the above loses if gcc does not use the system linker. |
160 | # If that happens, let me know about it. <jhi@iki.fi> |
161 | |
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162 | |
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163 | # If debugging or (old systems and doing shared) |
164 | # then do not strip the lib, otherwise, strip. |
165 | # As noted above the -DDEBUGGING is added automagically by Configure if -g. |
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166 | case "$optimize" in |
167 | *-g*) ;; # left intentionally blank |
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168 | *) case "$_DEC_uname_r" in |
169 | *[123].*) |
170 | case "$useshrplib" in |
171 | false|undef|'') lddlflags="$lddlflags -s" ;; |
172 | esac |
173 | ;; |
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174 | *) lddlflags="$lddlflags -s" |
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175 | ;; |
176 | esac |
177 | ;; |
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178 | esac |
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179 | |
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180 | if [ "X$usethreads" = "X$define" ]; then |
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181 | # Threads interfaces changed with V4.0. |
182 | case "$_DEC_uname_r" in |
183 | *[123].*) libswanted="$libswanted pthreads mach exc c_r" |
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184 | ccflags="-threads $ccflags" |
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185 | ;; |
186 | *) libswanted="$libswanted pthread exc" |
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187 | ccflags="-pthread $ccflags" |
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188 | ;; |
189 | esac |
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190 | usemymalloc='n' |
191 | fi |
192 | |
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193 | # |
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194 | # Make embedding in things like INN and Apache more memory friendly. |
195 | # Keep it overridable on the Configure command line, though, so that |
196 | # "-Uuseshrplib" prevents this default. |
197 | # |
198 | |
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199 | # This or the glibpth change above breaks the build. Commented out |
200 | # for this snapshot. |
201 | #case "$_DEC_cc_style.$useshrplib" in |
202 | # new.) useshrplib="$define" ;; |
203 | #esac |
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204 | |
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205 | # The EFF_ONLY_OK from <sys/access.h> is dysfunctional for [RWX]_OK |
206 | # as of Digital UNIX 4.0[A-D]?. If and when this gets fixed, adjust |
207 | # this appropriately. |
208 | |
209 | pp_sys_cflags='ccflags="$ccflags -DNO_EFF_ONLY_OK"' |
210 | |
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211 | # |
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212 | # Unset temporary variables no more needed. |
213 | # |
214 | |
215 | unset _DEC_cc_style |
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216 | unset _DEC_uname_r |
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217 | |
218 | # |
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219 | # History: |
220 | # |
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221 | # perl5.004_57: |
222 | # |
223 | # 19-Dec-1997 Spider Boardman <spider@Orb.Nashua.NH.US> |
224 | # |
225 | # * Newer Digial UNIX compilers enforce signaling for NaN without |
226 | # -ieee. Added -fprm d at the same time since it's friendlier for |
227 | # embedding. |
228 | # |
229 | # * Fixed the library search path to match cc, ld, and /sbin/loader. |
230 | # |
231 | # * Default to building -Duseshrplib on newer systems. -Uuseshrplib |
232 | # still overrides. |
233 | # |
234 | # * Fix -pthread additions for useshrplib. ld has no -pthread option. |
235 | # |
236 | # |
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237 | # perl5.004_04: |
238 | # |
239 | # 19-Sep-1997 Spider Boardman <spider@Orb.Nashua.NH.US> |
240 | # |
241 | # * libnet on Digital UNIX is for JAVA, not for sockets. |
242 | # |
243 | # |
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244 | # perl5.003_28: |
245 | # |
246 | # 22-Feb-1997 Jarkko Hietaniemi <jhi@iki.fi> |
247 | # |
248 | # * Restructuring Spider's suggestions. |
249 | # |
250 | # * Older Digital UNIXes cannot handle -Olimit ... for $lddlflags. |
251 | # |
252 | # * ld -s cannot be used in older Digital UNIXes when doing shared. |
253 | # |
254 | # |
255 | # 21-Feb-1997 Spider Boardman <spider@Orb.Nashua.NH.US> |
256 | # |
257 | # * -hidden removed. |
258 | # |
259 | # * -DSTANDARD_C removed. |
260 | # |
261 | # * -D_INTRINSICS added. (that -fast does not seem to buy much confirmed) |
262 | # |
263 | # * odbm not in libc, only ndbm. Therefore dbm back to $libswanted. |
264 | # |
265 | # * -msym for the newer runtime loaders. |
266 | # |
267 | # * $optimize also in $lddflags. |
268 | # |
269 | # |
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270 | # perl5.003_27: |
271 | # |
272 | # 18-Feb-1997 Jarkko Hietaniemi <jhi@iki.fi> |
273 | # |
274 | # * unset _DEC_cc_style and more commentary on -std. |
275 | # |
276 | # |
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277 | # perl5.003_26: |
278 | # |
279 | # 15-Feb-1997 Jarkko Hietaniemi <jhi@iki.fi> |
280 | # |
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281 | # * -std and -ansi. |
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282 | # |
283 | # |
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284 | # perl5.003_24: |
285 | # |
286 | # 30-Jan-1997 Jarkko Hietaniemi <jhi@iki.fi> |
287 | # |
288 | # * Fixing the note on -DDEBUGGING. |
289 | # |
290 | # * Note on -O5 -fast. |
291 | # |
292 | # |
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293 | # perl5.003_23: |
294 | # |
295 | # 26-Jan-1997 Jarkko Hietaniemi <jhi@iki.fi> |
296 | # |
297 | # * Notes on how to do both optimisation and debugging. |
298 | # |
299 | # |
300 | # 25-Jan-1997 Jarkko Hietaniemi <jhi@iki.fi> |
301 | # |
302 | # * Remove unneeded libraries from $libswanted: PW, bsd, c, dbm |
303 | # |
304 | # * Restructure the $lddlflags build. |
305 | # |
306 | # * $optimize based on which compiler we have. |
307 | # |
308 | # |
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309 | # perl5.003_22: |
310 | # |
311 | # 23-Jan-1997 Achim Bohnet <ach@rosat.mpe-garching.mpg.de> |
312 | # |
313 | # * Added comments 'how to create a debugging version of perl' |
314 | # |
315 | # * Fixed logic of this script to prevent stripping of shared |
316 | # objects by the loader (see ld man page for -s) is debugging |
317 | # is set via the -g switch. |
318 | # |
319 | # |
320 | # 21-Jan-1997 Achim Bohnet <ach@rosat.mpe-garching.mpg.de> |
321 | # |
322 | # * now 'dl' is always removed from libswanted. Not only if |
323 | # optimize is an empty string. |
324 | # |
325 | # |
326 | # 17-Jan-1997 Achim Bohnet <ach@rosat.mpe-garching.mpg.de> |
327 | # |
328 | # * Removed 'dl' from libswanted: When the FreePort binary |
329 | # translator for Sun binaries is installed Configure concludes |
330 | # that it should use libdl.x.yz.fpx.so :-( |
331 | # Because the dlopen, dlclose,... calls are in the |
332 | # C library it not necessary at all to check for the |
333 | # dl library. Therefore dl is removed from libswanted. |
334 | # |
335 | # |
336 | # 1-Jan-1997 Achim Bohnet <ach@rosat.mpe-garching.mpg.de> |
337 | # |
338 | # * Set -Olimit to 3200 because perl_yylex.c got too big |
339 | # for the optimizer. |
340 | # |