Commit | Line | Data |
---|---|---|
a0d0e21e | 1 | # hints/dec_osf.sh |
8e964347 | 2 | |
b971f6e4 | 3 | # * If you want to debug perl or want to send a |
8e964347 AB |
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 | # | |
8a019ce7 JH |
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 | # | |
b971f6e4 | 13 | # * gcc can always have both -g and optimisation on. |
8a019ce7 | 14 | # |
b971f6e4 | 15 | # * debugging optimised code, no matter what compiler |
8a019ce7 JH |
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 | # | |
b971f6e4 | 22 | # * Configure will automatically add the often quoted |
f2c69087 JH |
23 | # -DDEBUGGING for you if the -g is specified. |
24 | # | |
b971f6e4 | 25 | # * There is even more optimisation available in the new |
f2c69087 JH |
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. | |
8e964347 | 33 | # |
b971f6e4 | 34 | # * The -std is needed because the following compiled |
e60a08f8 JH |
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 | # | |
b971f6e4 | 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 | # | |
8e964347 | 53 | |
e60a08f8 JH |
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 | ||
b971f6e4 | 61 | # do NOT, I repeat, *NOT* take away those leading tabs |
62 | # reset | |
63 | _DEC_uname_r= | |
e60a08f8 | 64 | _DEC_cc_style= |
b971f6e4 | 65 | # set |
66 | _DEC_uname_r=`uname -r` | |
67 | # _DEC_cc_style set soon below | |
e60a08f8 JH |
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$$.o 2>&1`" in | |
75 | */gemc_cc*) # we have the new DEC GEM CC | |
dfa3a3d3 | 76 | _DEC_cc_style=new |
8a019ce7 | 77 | ;; |
e60a08f8 | 78 | *) # we have the old MIPS CC |
dfa3a3d3 | 79 | _DEC_cc_style=old |
8a019ce7 | 80 | ;; |
e60a08f8 JH |
81 | esac |
82 | # cleanup | |
83 | rm -f /tmp/taint$$.o | |
84 | ;; | |
85 | esac | |
86 | ||
b971f6e4 | 87 | # be nauseatingly ANSI |
88 | case "$cc" in | |
9607fc9c | 89 | *gcc*) ccflags="$ccflags -ansi" |
b971f6e4 | 90 | ;; |
91 | *) ccflags="$ccflags -std" | |
92 | ;; | |
93 | esac | |
94 | ||
95 | # for gcc the Configure knows about the -fpic: | |
96 | # position-independent code for dynamic loading | |
97 | ||
e60a08f8 JH |
98 | # we want optimisation |
99 | ||
100 | case "$optimize" in | |
101 | '') case "$cc" in | |
102 | *gcc*) | |
103 | optimize='-O3' ;; | |
104 | *) case "$_DEC_cc_style" in | |
313489a2 SB |
105 | new) optimize='-O4' |
106 | ccflags="$ccflags -fprm d -ieee" | |
107 | ;; | |
e60a08f8 JH |
108 | old) optimize='-O2 -Olimit 3200' ;; |
109 | esac | |
b971f6e4 | 110 | ccflags="$ccflags -D_INTRINSICS" |
e60a08f8 | 111 | ;; |
8e964347 AB |
112 | esac |
113 | ;; | |
1fc4cb55 | 114 | esac |
28757baa | 115 | |
313489a2 SB |
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. | |
b0362887 SB |
124 | glibpth="/usr/shlib /usr/ccs/lib /usr/lib/cmplrs/cc" |
125 | glibpth="$glibpth /usr/lib /usr/local/lib /var/shlib" | |
313489a2 | 126 | |
8e964347 AB |
127 | # dlopen() is in libc |
128 | libswanted="`echo $libswanted | sed -e 's/ dl / /'`" | |
129 | ||
b971f6e4 | 130 | # libPW contains nothing useful for perl |
8a019ce7 JH |
131 | libswanted="`echo $libswanted | sed -e 's/ PW / /'`" |
132 | ||
723e14d4 SB |
133 | # libnet contains nothing useful for perl here, and doesn't work |
134 | libswanted="`echo $libswanted | sed -e 's/ net / /'`" | |
135 | ||
b971f6e4 | 136 | # libbsd contains nothing used by perl that is not already in libc |
8a019ce7 JH |
137 | libswanted="`echo $libswanted | sed -e 's/ bsd / /'`" |
138 | ||
b971f6e4 | 139 | # libc need not be separately listed |
8a019ce7 JH |
140 | libswanted="`echo $libswanted | sed -e 's/ c / /'`" |
141 | ||
b971f6e4 | 142 | # ndbm is already in libc |
143 | libswanted="`echo $libswanted | sed -e 's/ ndbm / /'`" | |
8a019ce7 JH |
144 | |
145 | # the basic lddlflags used always | |
146 | lddlflags='-shared -expect_unresolved "*"' | |
147 | ||
b971f6e4 | 148 | # Fancy compiler suites use optimising linker as well as compiler. |
149 | # <spider@Orb.Nashua.NH.US> | |
150 | case "$_DEC_uname_r" in | |
151 | *[123].*) # old loader | |
152 | lddlflags="$lddlflags -O3" | |
153 | ;; | |
154 | *) lddlflags="$lddlflags $optimize -msym" | |
155 | # -msym: If using a sufficiently recent /sbin/loader, | |
156 | # keep the module symbols with the modules. | |
157 | ;; | |
158 | esac | |
159 | # Yes, the above loses if gcc does not use the system linker. | |
160 | # If that happens, let me know about it. <jhi@iki.fi> | |
161 | ||
8a019ce7 | 162 | |
b971f6e4 | 163 | # If debugging or (old systems and doing shared) |
164 | # then do not strip the lib, otherwise, strip. | |
165 | # As noted above the -DDEBUGGING is added automagically by Configure if -g. | |
8a019ce7 JH |
166 | case "$optimize" in |
167 | *-g*) ;; # left intentionally blank | |
b971f6e4 | 168 | *) case "$_DEC_uname_r" in |
169 | *[123].*) | |
170 | case "$useshrplib" in | |
171 | false|undef|'') lddlflags="$lddlflags -s" ;; | |
172 | esac | |
173 | ;; | |
8a019ce7 | 174 | *) lddlflags="$lddlflags -s" |
b971f6e4 | 175 | ;; |
176 | esac | |
177 | ;; | |
8a019ce7 | 178 | esac |
8e964347 | 179 | |
e5c9fcd0 | 180 | if [ "X$usethreads" = "X$define" ]; then |
313489a2 SB |
181 | # Threads interfaces changed with V4.0. |
182 | case "$_DEC_uname_r" in | |
183 | *[123].*) libswanted="$libswanted pthreads mach exc c_r" | |
dfe9444c | 184 | ccflags="-threads $ccflags" |
313489a2 SB |
185 | ;; |
186 | *) libswanted="$libswanted pthread exc" | |
dfe9444c | 187 | ccflags="-pthread $ccflags" |
313489a2 SB |
188 | ;; |
189 | esac | |
b981e18e MB |
190 | usemymalloc='n' |
191 | fi | |
192 | ||
8e964347 | 193 | # |
313489a2 SB |
194 | # Make embedding in things like INN and Apache more memory friendly. |
195 | # Keep it overridable on the Configure command line, though, so that | |
196 | # "-Uuseshrplib" prevents this default. | |
197 | # | |
198 | ||
e7f07268 MB |
199 | # This or the glibpth change above breaks the build. Commented out |
200 | # for this snapshot. | |
201 | #case "$_DEC_cc_style.$useshrplib" in | |
202 | # new.) useshrplib="$define" ;; | |
203 | #esac | |
313489a2 SB |
204 | |
205 | # | |
e60a08f8 JH |
206 | # Unset temporary variables no more needed. |
207 | # | |
208 | ||
209 | unset _DEC_cc_style | |
b971f6e4 | 210 | unset _DEC_uname_r |
e60a08f8 JH |
211 | |
212 | # | |
8e964347 AB |
213 | # History: |
214 | # | |
313489a2 SB |
215 | # perl5.004_57: |
216 | # | |
217 | # 19-Dec-1997 Spider Boardman <spider@Orb.Nashua.NH.US> | |
218 | # | |
219 | # * Newer Digial UNIX compilers enforce signaling for NaN without | |
220 | # -ieee. Added -fprm d at the same time since it's friendlier for | |
221 | # embedding. | |
222 | # | |
223 | # * Fixed the library search path to match cc, ld, and /sbin/loader. | |
224 | # | |
225 | # * Default to building -Duseshrplib on newer systems. -Uuseshrplib | |
226 | # still overrides. | |
227 | # | |
228 | # * Fix -pthread additions for useshrplib. ld has no -pthread option. | |
229 | # | |
230 | # | |
723e14d4 SB |
231 | # perl5.004_04: |
232 | # | |
233 | # 19-Sep-1997 Spider Boardman <spider@Orb.Nashua.NH.US> | |
234 | # | |
235 | # * libnet on Digital UNIX is for JAVA, not for sockets. | |
236 | # | |
237 | # | |
b971f6e4 | 238 | # perl5.003_28: |
239 | # | |
240 | # 22-Feb-1997 Jarkko Hietaniemi <jhi@iki.fi> | |
241 | # | |
242 | # * Restructuring Spider's suggestions. | |
243 | # | |
244 | # * Older Digital UNIXes cannot handle -Olimit ... for $lddlflags. | |
245 | # | |
246 | # * ld -s cannot be used in older Digital UNIXes when doing shared. | |
247 | # | |
248 | # | |
249 | # 21-Feb-1997 Spider Boardman <spider@Orb.Nashua.NH.US> | |
250 | # | |
251 | # * -hidden removed. | |
252 | # | |
253 | # * -DSTANDARD_C removed. | |
254 | # | |
255 | # * -D_INTRINSICS added. (that -fast does not seem to buy much confirmed) | |
256 | # | |
257 | # * odbm not in libc, only ndbm. Therefore dbm back to $libswanted. | |
258 | # | |
259 | # * -msym for the newer runtime loaders. | |
260 | # | |
261 | # * $optimize also in $lddflags. | |
262 | # | |
263 | # | |
e60a08f8 JH |
264 | # perl5.003_27: |
265 | # | |
266 | # 18-Feb-1997 Jarkko Hietaniemi <jhi@iki.fi> | |
267 | # | |
268 | # * unset _DEC_cc_style and more commentary on -std. | |
269 | # | |
270 | # | |
dfa3a3d3 CS |
271 | # perl5.003_26: |
272 | # | |
273 | # 15-Feb-1997 Jarkko Hietaniemi <jhi@iki.fi> | |
274 | # | |
e60a08f8 | 275 | # * -std and -ansi. |
dfa3a3d3 CS |
276 | # |
277 | # | |
f2c69087 JH |
278 | # perl5.003_24: |
279 | # | |
280 | # 30-Jan-1997 Jarkko Hietaniemi <jhi@iki.fi> | |
281 | # | |
282 | # * Fixing the note on -DDEBUGGING. | |
283 | # | |
284 | # * Note on -O5 -fast. | |
285 | # | |
286 | # | |
8a019ce7 JH |
287 | # perl5.003_23: |
288 | # | |
289 | # 26-Jan-1997 Jarkko Hietaniemi <jhi@iki.fi> | |
290 | # | |
291 | # * Notes on how to do both optimisation and debugging. | |
292 | # | |
293 | # | |
294 | # 25-Jan-1997 Jarkko Hietaniemi <jhi@iki.fi> | |
295 | # | |
296 | # * Remove unneeded libraries from $libswanted: PW, bsd, c, dbm | |
297 | # | |
298 | # * Restructure the $lddlflags build. | |
299 | # | |
300 | # * $optimize based on which compiler we have. | |
301 | # | |
302 | # | |
8e964347 AB |
303 | # perl5.003_22: |
304 | # | |
305 | # 23-Jan-1997 Achim Bohnet <ach@rosat.mpe-garching.mpg.de> | |
306 | # | |
307 | # * Added comments 'how to create a debugging version of perl' | |
308 | # | |
309 | # * Fixed logic of this script to prevent stripping of shared | |
310 | # objects by the loader (see ld man page for -s) is debugging | |
311 | # is set via the -g switch. | |
312 | # | |
313 | # | |
314 | # 21-Jan-1997 Achim Bohnet <ach@rosat.mpe-garching.mpg.de> | |
315 | # | |
316 | # * now 'dl' is always removed from libswanted. Not only if | |
317 | # optimize is an empty string. | |
318 | # | |
319 | # | |
320 | # 17-Jan-1997 Achim Bohnet <ach@rosat.mpe-garching.mpg.de> | |
321 | # | |
322 | # * Removed 'dl' from libswanted: When the FreePort binary | |
323 | # translator for Sun binaries is installed Configure concludes | |
324 | # that it should use libdl.x.yz.fpx.so :-( | |
325 | # Because the dlopen, dlclose,... calls are in the | |
326 | # C library it not necessary at all to check for the | |
327 | # dl library. Therefore dl is removed from libswanted. | |
328 | # | |
329 | # | |
330 | # 1-Jan-1997 Achim Bohnet <ach@rosat.mpe-garching.mpg.de> | |
331 | # | |
332 | # * Set -Olimit to 3200 because perl_yylex.c got too big | |
333 | # for the optimizer. | |
334 | # |