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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 the leading tabs |
62 | # Configure Black Magic (TM) |
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63 | # reset |
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64 | _DEC_cc_style= |
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65 | case "$cc" in |
66 | *gcc*) ;; # pass |
67 | *) # compile something small: taint.c is fine for this. |
68 | # the main point is the '-v' flag of 'cc'. |
69 | case "`cc -v -I. -c taint.c -o /tmp/taint$$.o 2>&1`" in |
70 | */gemc_cc*) # we have the new DEC GEM CC |
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71 | _DEC_cc_style=new |
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72 | ;; |
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73 | *) # we have the old MIPS CC |
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74 | _DEC_cc_style=old |
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75 | ;; |
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76 | esac |
77 | # cleanup |
78 | rm -f /tmp/taint$$.o |
79 | ;; |
80 | esac |
81 | |
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82 | # be nauseatingly ANSI |
83 | case "$cc" in |
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84 | *gcc*) ccflags="$ccflags -ansi" |
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85 | ;; |
86 | *) ccflags="$ccflags -std" |
87 | ;; |
88 | esac |
89 | |
90 | # for gcc the Configure knows about the -fpic: |
91 | # position-independent code for dynamic loading |
92 | |
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93 | # we want optimisation |
94 | |
95 | case "$optimize" in |
96 | '') case "$cc" in |
97 | *gcc*) |
98 | optimize='-O3' ;; |
99 | *) case "$_DEC_cc_style" in |
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100 | new) optimize='-O4' |
101 | ccflags="$ccflags -fprm d -ieee" |
102 | ;; |
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103 | old) optimize='-O2 -Olimit 3200' ;; |
104 | esac |
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105 | ccflags="$ccflags -D_INTRINSICS" |
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106 | ;; |
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107 | esac |
108 | ;; |
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109 | esac |
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110 | |
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111 | # Make glibpth agree with the compiler suite. Note that /shlib |
112 | # is not here. That's on purpose. Even though that's where libc |
113 | # really lives from V4.0 on, the linker (and /sbin/loader) won't |
114 | # look there by default. The sharable /sbin utilities were all |
115 | # built with "-Wl,-rpath,/shlib" to get around that. This makes |
116 | # no attempt to figure out the additional location(s) searched by |
117 | # gcc, since not all versions of gcc are easily coerced into |
118 | # revealing that information. |
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119 | glibpth="/usr/shlib /usr/ccs/lib /usr/lib/cmplrs/cc" |
120 | glibpth="$glibpth /usr/lib /usr/local/lib /var/shlib" |
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121 | |
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122 | # dlopen() is in libc |
123 | libswanted="`echo $libswanted | sed -e 's/ dl / /'`" |
124 | |
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125 | # libPW contains nothing useful for perl |
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126 | libswanted="`echo $libswanted | sed -e 's/ PW / /'`" |
127 | |
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128 | # libnet contains nothing useful for perl here, and doesn't work |
129 | libswanted="`echo $libswanted | sed -e 's/ net / /'`" |
130 | |
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131 | # libbsd contains nothing used by perl that is not already in libc |
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132 | libswanted="`echo $libswanted | sed -e 's/ bsd / /'`" |
133 | |
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134 | # libc need not be separately listed |
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135 | libswanted="`echo $libswanted | sed -e 's/ c / /'`" |
136 | |
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137 | # ndbm is already in libc |
138 | libswanted="`echo $libswanted | sed -e 's/ ndbm / /'`" |
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139 | |
140 | # the basic lddlflags used always |
141 | lddlflags='-shared -expect_unresolved "*"' |
142 | |
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143 | # Fancy compiler suites use optimising linker as well as compiler. |
144 | # <spider@Orb.Nashua.NH.US> |
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145 | case "`uname -r`" in |
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146 | *[123].*) # old loader |
147 | lddlflags="$lddlflags -O3" |
148 | ;; |
149 | *) lddlflags="$lddlflags $optimize -msym" |
150 | # -msym: If using a sufficiently recent /sbin/loader, |
151 | # keep the module symbols with the modules. |
152 | ;; |
153 | esac |
154 | # Yes, the above loses if gcc does not use the system linker. |
155 | # If that happens, let me know about it. <jhi@iki.fi> |
156 | |
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157 | |
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158 | # If debugging or (old systems and doing shared) |
159 | # then do not strip the lib, otherwise, strip. |
160 | # As noted above the -DDEBUGGING is added automagically by Configure if -g. |
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161 | case "$optimize" in |
162 | *-g*) ;; # left intentionally blank |
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163 | *) case "`uname -r`" in |
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164 | *[123].*) |
165 | case "$useshrplib" in |
166 | false|undef|'') lddlflags="$lddlflags -s" ;; |
167 | esac |
168 | ;; |
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169 | *) lddlflags="$lddlflags -s" |
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170 | ;; |
171 | esac |
172 | ;; |
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173 | esac |
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174 | |
175 | # |
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176 | # Make embedding in things like INN and Apache more memory friendly. |
177 | # Keep it overridable on the Configure command line, though, so that |
178 | # "-Uuseshrplib" prevents this default. |
179 | # |
180 | |
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181 | # This or the glibpth change above breaks the build. Commented out |
182 | # for this snapshot. |
183 | #case "$_DEC_cc_style.$useshrplib" in |
184 | # new.) useshrplib="$define" ;; |
185 | #esac |
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186 | |
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187 | # The EFF_ONLY_OK from <sys/access.h> is present but dysfunctional for |
188 | # [RWX]_OK as of Digital UNIX 4.0[A-D]?. If and when this gets fixed, |
189 | # please adjust this appropriately. See also pp_sys.c just before the |
190 | # emulate_eaccess(). |
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191 | |
192 | pp_sys_cflags='ccflags="$ccflags -DNO_EFF_ONLY_OK"' |
193 | |
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194 | # |
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195 | # Unset temporary variables no more needed. |
196 | # |
197 | |
198 | unset _DEC_cc_style |
199 | |
200 | # |
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201 | # History: |
202 | # |
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203 | # perl5.005_51: |
204 | # |
205 | # September-1998 Jarkko Hietaniemi <jhi@iki.fi> |
206 | # |
207 | # * Added the -DNO_EFF_ONLY_OK flag ('use filetest;' support). |
208 | # |
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209 | # perl5.004_57: |
210 | # |
211 | # 19-Dec-1997 Spider Boardman <spider@Orb.Nashua.NH.US> |
212 | # |
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213 | # * Newer Digital UNIX compilers enforce signaling for NaN without |
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214 | # -ieee. Added -fprm d at the same time since it's friendlier for |
215 | # embedding. |
216 | # |
217 | # * Fixed the library search path to match cc, ld, and /sbin/loader. |
218 | # |
219 | # * Default to building -Duseshrplib on newer systems. -Uuseshrplib |
220 | # still overrides. |
221 | # |
222 | # * Fix -pthread additions for useshrplib. ld has no -pthread option. |
223 | # |
224 | # |
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225 | # perl5.004_04: |
226 | # |
227 | # 19-Sep-1997 Spider Boardman <spider@Orb.Nashua.NH.US> |
228 | # |
229 | # * libnet on Digital UNIX is for JAVA, not for sockets. |
230 | # |
231 | # |
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232 | # perl5.003_28: |
233 | # |
234 | # 22-Feb-1997 Jarkko Hietaniemi <jhi@iki.fi> |
235 | # |
236 | # * Restructuring Spider's suggestions. |
237 | # |
238 | # * Older Digital UNIXes cannot handle -Olimit ... for $lddlflags. |
239 | # |
240 | # * ld -s cannot be used in older Digital UNIXes when doing shared. |
241 | # |
242 | # |
243 | # 21-Feb-1997 Spider Boardman <spider@Orb.Nashua.NH.US> |
244 | # |
245 | # * -hidden removed. |
246 | # |
247 | # * -DSTANDARD_C removed. |
248 | # |
249 | # * -D_INTRINSICS added. (that -fast does not seem to buy much confirmed) |
250 | # |
251 | # * odbm not in libc, only ndbm. Therefore dbm back to $libswanted. |
252 | # |
253 | # * -msym for the newer runtime loaders. |
254 | # |
255 | # * $optimize also in $lddflags. |
256 | # |
257 | # |
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258 | # perl5.003_27: |
259 | # |
260 | # 18-Feb-1997 Jarkko Hietaniemi <jhi@iki.fi> |
261 | # |
262 | # * unset _DEC_cc_style and more commentary on -std. |
263 | # |
264 | # |
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265 | # perl5.003_26: |
266 | # |
267 | # 15-Feb-1997 Jarkko Hietaniemi <jhi@iki.fi> |
268 | # |
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269 | # * -std and -ansi. |
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270 | # |
271 | # |
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272 | # perl5.003_24: |
273 | # |
274 | # 30-Jan-1997 Jarkko Hietaniemi <jhi@iki.fi> |
275 | # |
276 | # * Fixing the note on -DDEBUGGING. |
277 | # |
278 | # * Note on -O5 -fast. |
279 | # |
280 | # |
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281 | # perl5.003_23: |
282 | # |
283 | # 26-Jan-1997 Jarkko Hietaniemi <jhi@iki.fi> |
284 | # |
285 | # * Notes on how to do both optimisation and debugging. |
286 | # |
287 | # |
288 | # 25-Jan-1997 Jarkko Hietaniemi <jhi@iki.fi> |
289 | # |
290 | # * Remove unneeded libraries from $libswanted: PW, bsd, c, dbm |
291 | # |
292 | # * Restructure the $lddlflags build. |
293 | # |
294 | # * $optimize based on which compiler we have. |
295 | # |
296 | # |
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297 | # perl5.003_22: |
298 | # |
299 | # 23-Jan-1997 Achim Bohnet <ach@rosat.mpe-garching.mpg.de> |
300 | # |
301 | # * Added comments 'how to create a debugging version of perl' |
302 | # |
303 | # * Fixed logic of this script to prevent stripping of shared |
304 | # objects by the loader (see ld man page for -s) is debugging |
305 | # is set via the -g switch. |
306 | # |
307 | # |
308 | # 21-Jan-1997 Achim Bohnet <ach@rosat.mpe-garching.mpg.de> |
309 | # |
310 | # * now 'dl' is always removed from libswanted. Not only if |
311 | # optimize is an empty string. |
312 | # |
313 | # |
314 | # 17-Jan-1997 Achim Bohnet <ach@rosat.mpe-garching.mpg.de> |
315 | # |
316 | # * Removed 'dl' from libswanted: When the FreePort binary |
317 | # translator for Sun binaries is installed Configure concludes |
318 | # that it should use libdl.x.yz.fpx.so :-( |
319 | # Because the dlopen, dlclose,... calls are in the |
320 | # C library it not necessary at all to check for the |
321 | # dl library. Therefore dl is removed from libswanted. |
322 | # |
323 | # |
324 | # 1-Jan-1997 Achim Bohnet <ach@rosat.mpe-garching.mpg.de> |
325 | # |
326 | # * Set -Olimit to 3200 because perl_yylex.c got too big |
327 | # for the optimizer. |
328 | # |