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005c1a0e |
1 | package ExtUtils::Liblist; |
cb50131a |
2 | |
3 | use 5.005_64; |
005c1a0e |
4 | # Broken out of MakeMaker from version 4.11 |
5 | |
cb50131a |
6 | our $VERSION = substr q$Revision: 1.25 $, 10; |
f1387719 |
7 | |
005c1a0e |
8 | use Config; |
8f1aa56b |
9 | use Cwd 'cwd'; |
4633a7c4 |
10 | use File::Basename; |
11 | |
005c1a0e |
12 | sub ext { |
3e3baf6d |
13 | if ($^O eq 'VMS') { return &_vms_ext; } |
14 | elsif($^O eq 'MSWin32') { return &_win32_ext; } |
15 | else { return &_unix_os2_ext; } |
55497cff |
16 | } |
17 | |
18 | sub _unix_os2_ext { |
e611f912 |
19 | my($self,$potential_libs, $verbose) = @_; |
f1387719 |
20 | if ($^O =~ 'os2' and $Config{libs}) { |
4e68a208 |
21 | # Dynamic libraries are not transitive, so we may need including |
22 | # the libraries linked against perl.dll again. |
23 | |
24 | $potential_libs .= " " if $potential_libs; |
25 | $potential_libs .= $Config{libs}; |
26 | } |
4633a7c4 |
27 | return ("", "", "", "") unless $potential_libs; |
fb73857a |
28 | warn "Potential libraries are '$potential_libs':\n" if $verbose; |
005c1a0e |
29 | |
30 | my($so) = $Config{'so'}; |
31 | my($libs) = $Config{'libs'}; |
55497cff |
32 | my $Config_libext = $Config{lib_ext} || ".a"; |
33 | |
005c1a0e |
34 | |
35 | # compute $extralibs, $bsloadlibs and $ldloadlibs from |
36 | # $potential_libs |
37 | # this is a rewrite of Andy Dougherty's extliblist in perl |
005c1a0e |
38 | |
39 | my(@searchpath); # from "-L/path" entries in $potential_libs |
40 | my(@libpath) = split " ", $Config{'libpth'}; |
4633a7c4 |
41 | my(@ldloadlibs, @bsloadlibs, @extralibs, @ld_run_path, %ld_run_path_seen); |
005c1a0e |
42 | my($fullname, $thislib, $thispth, @fullname); |
8f1aa56b |
43 | my($pwd) = cwd(); # from Cwd.pm |
005c1a0e |
44 | my($found) = 0; |
45 | |
46 | foreach $thislib (split ' ', $potential_libs){ |
47 | |
48 | # Handle possible linker path arguments. |
49 | if ($thislib =~ s/^(-[LR])//){ # save path flag type |
50 | my($ptype) = $1; |
51 | unless (-d $thislib){ |
fb73857a |
52 | warn "$ptype$thislib ignored, directory does not exist\n" |
e611f912 |
53 | if $verbose; |
005c1a0e |
54 | next; |
55 | } |
f1387719 |
56 | unless ($self->file_name_is_absolute($thislib)) { |
fb73857a |
57 | warn "Warning: $ptype$thislib changed to $ptype$pwd/$thislib\n"; |
f1387719 |
58 | $thislib = $self->catdir($pwd,$thislib); |
005c1a0e |
59 | } |
60 | push(@searchpath, $thislib); |
61 | push(@extralibs, "$ptype$thislib"); |
62 | push(@ldloadlibs, "$ptype$thislib"); |
63 | next; |
64 | } |
65 | |
66 | # Handle possible library arguments. |
67 | unless ($thislib =~ s/^-l//){ |
fb73857a |
68 | warn "Unrecognized argument in LIBS ignored: '$thislib'\n"; |
005c1a0e |
69 | next; |
70 | } |
71 | |
72 | my($found_lib)=0; |
73 | foreach $thispth (@searchpath, @libpath){ |
74 | |
75 | # Try to find the full name of the library. We need this to |
76 | # determine whether it's a dynamically-loadable library or not. |
77 | # This tends to be subject to various os-specific quirks. |
78 | # For gcc-2.6.2 on linux (March 1995), DLD can not load |
79 | # .sa libraries, with the exception of libm.sa, so we |
80 | # deliberately skip them. |
4e1fac24 |
81 | if (@fullname = |
82 | $self->lsdir($thispth,"^\Qlib$thislib.$so.\E[0-9]+")){ |
005c1a0e |
83 | # Take care that libfoo.so.10 wins against libfoo.so.9. |
84 | # Compare two libraries to find the most recent version |
85 | # number. E.g. if you have libfoo.so.9.0.7 and |
86 | # libfoo.so.10.1, first convert all digits into two |
87 | # decimal places. Then we'll add ".00" to the shorter |
88 | # strings so that we're comparing strings of equal length |
89 | # Thus we'll compare libfoo.so.09.07.00 with |
90 | # libfoo.so.10.01.00. Some libraries might have letters |
91 | # in the version. We don't know what they mean, but will |
92 | # try to skip them gracefully -- we'll set any letter to |
93 | # '0'. Finally, sort in reverse so we can take the |
94 | # first element. |
95 | |
96 | #TODO: iterate through the directory instead of sorting |
97 | |
98 | $fullname = "$thispth/" . |
99 | (sort { my($ma) = $a; |
100 | my($mb) = $b; |
101 | $ma =~ tr/A-Za-z/0/s; |
102 | $ma =~ s/\b(\d)\b/0$1/g; |
103 | $mb =~ tr/A-Za-z/0/s; |
104 | $mb =~ s/\b(\d)\b/0$1/g; |
105 | while (length($ma) < length($mb)) { $ma .= ".00"; } |
106 | while (length($mb) < length($ma)) { $mb .= ".00"; } |
107 | # Comparison deliberately backwards |
108 | $mb cmp $ma;} @fullname)[0]; |
109 | } elsif (-f ($fullname="$thispth/lib$thislib.$so") |
110 | && (($Config{'dlsrc'} ne "dl_dld.xs") || ($thislib eq "m"))){ |
4633a7c4 |
111 | } elsif (-f ($fullname="$thispth/lib${thislib}_s$Config_libext") |
005c1a0e |
112 | && ($thislib .= "_s") ){ # we must explicitly use _s version |
4633a7c4 |
113 | } elsif (-f ($fullname="$thispth/lib$thislib$Config_libext")){ |
864a5fa8 |
114 | } elsif (-f ($fullname="$thispth/$thislib$Config_libext")){ |
4633a7c4 |
115 | } elsif (-f ($fullname="$thispth/Slib$thislib$Config_libext")){ |
8f1aa56b |
116 | } elsif ($^O eq 'dgux' |
c07a80fd |
117 | && -l ($fullname="$thispth/lib$thislib$Config_libext") |
118 | && readlink($fullname) =~ /^elink:/) { |
119 | # Some of DG's libraries look like misconnected symbolic |
120 | # links, but development tools can follow them. (They |
121 | # look like this: |
122 | # |
123 | # libm.a -> elink:${SDE_PATH:-/usr}/sde/\ |
124 | # ${TARGET_BINARY_INTERFACE:-m88kdgux}/usr/lib/libm.a |
125 | # |
126 | # , the compilation tools expand the environment variables.) |
005c1a0e |
127 | } else { |
fb73857a |
128 | warn "$thislib not found in $thispth\n" if $verbose; |
005c1a0e |
129 | next; |
130 | } |
fb73857a |
131 | warn "'-l$thislib' found at $fullname\n" if $verbose; |
4633a7c4 |
132 | my($fullnamedir) = dirname($fullname); |
133 | push @ld_run_path, $fullnamedir unless $ld_run_path_seen{$fullnamedir}++; |
005c1a0e |
134 | $found++; |
135 | $found_lib++; |
136 | |
137 | # Now update library lists |
138 | |
139 | # what do we know about this library... |
4633a7c4 |
140 | my $is_dyna = ($fullname !~ /\Q$Config_libext\E$/); |
4e68a208 |
141 | my $in_perl = ($libs =~ /\B-l\Q$ {thislib}\E\b/s); |
005c1a0e |
142 | |
143 | # Do not add it into the list if it is already linked in |
144 | # with the main perl executable. |
974f612f |
145 | # We have to special-case the NeXT, because math and ndbm |
146 | # are both in libsys_s |
005c1a0e |
147 | unless ($in_perl || |
974f612f |
148 | ($Config{'osname'} eq 'next' && |
149 | ($thislib eq 'm' || $thislib eq 'ndbm')) ){ |
005c1a0e |
150 | push(@extralibs, "-l$thislib"); |
151 | } |
152 | |
153 | # We might be able to load this archive file dynamically |
974f612f |
154 | if ( ($Config{'dlsrc'} =~ /dl_next/ && $Config{'osvers'} lt '4_0') |
155 | || ($Config{'dlsrc'} =~ /dl_dld/) ) |
156 | { |
005c1a0e |
157 | # We push -l$thislib instead of $fullname because |
158 | # it avoids hardwiring a fixed path into the .bs file. |
159 | # Mkbootstrap will automatically add dl_findfile() to |
160 | # the .bs file if it sees a name in the -l format. |
161 | # USE THIS, when dl_findfile() is fixed: |
162 | # push(@bsloadlibs, "-l$thislib"); |
163 | # OLD USE WAS while checking results against old_extliblist |
164 | push(@bsloadlibs, "$fullname"); |
165 | } else { |
166 | if ($is_dyna){ |
167 | # For SunOS4, do not add in this shared library if |
168 | # it is already linked in the main perl executable |
169 | push(@ldloadlibs, "-l$thislib") |
8f1aa56b |
170 | unless ($in_perl and $^O eq 'sunos'); |
005c1a0e |
171 | } else { |
172 | push(@ldloadlibs, "-l$thislib"); |
173 | } |
174 | } |
175 | last; # found one here so don't bother looking further |
176 | } |
fb73857a |
177 | warn "Note (probably harmless): " |
f3d9a6ba |
178 | ."No library found for -l$thislib\n" |
005c1a0e |
179 | unless $found_lib>0; |
180 | } |
4633a7c4 |
181 | return ('','','','') unless $found; |
182 | ("@extralibs", "@bsloadlibs", "@ldloadlibs",join(":",@ld_run_path)); |
005c1a0e |
183 | } |
184 | |
3e3baf6d |
185 | sub _win32_ext { |
ecc90c0e |
186 | |
187 | require Text::ParseWords; |
188 | |
e611f912 |
189 | my($self, $potential_libs, $verbose) = @_; |
3e3baf6d |
190 | |
191 | # If user did not supply a list, we punt. |
192 | # (caller should probably use the list in $Config{libs}) |
193 | return ("", "", "", "") unless $potential_libs; |
194 | |
944acd49 |
195 | my $cc = $Config{cc}; |
196 | my $VC = 1 if $cc =~ /^cl/i; |
197 | my $BC = 1 if $cc =~ /^bcc/i; |
198 | my $GC = 1 if $cc =~ /^gcc/i; |
199 | my $so = $Config{'so'}; |
200 | my $libs = $Config{'libs'}; |
201 | my $libpth = $Config{'libpth'}; |
202 | my $libext = $Config{'lib_ext'} || ".lib"; |
3e3baf6d |
203 | |
204 | if ($libs and $potential_libs !~ /:nodefault/i) { |
205 | # If Config.pm defines a set of default libs, we always |
206 | # tack them on to the user-supplied list, unless the user |
207 | # specified :nodefault |
208 | |
209 | $potential_libs .= " " if $potential_libs; |
210 | $potential_libs .= $libs; |
211 | } |
fb73857a |
212 | warn "Potential libraries are '$potential_libs':\n" if $verbose; |
3e3baf6d |
213 | |
621ba994 |
214 | # normalize to forward slashes |
215 | $libpth =~ s,\\,/,g; |
216 | $potential_libs =~ s,\\,/,g; |
217 | |
3e3baf6d |
218 | # compute $extralibs from $potential_libs |
219 | |
944acd49 |
220 | my @searchpath; # from "-L/path" in $potential_libs |
221 | my @libpath = Text::ParseWords::quotewords('\s+', 0, $libpth); |
222 | my @extralibs; |
223 | my $pwd = cwd(); # from Cwd.pm |
224 | my $lib = ''; |
225 | my $found = 0; |
226 | my $search = 1; |
3e3baf6d |
227 | my($fullname, $thislib, $thispth); |
3e3baf6d |
228 | |
b11c3c9f |
229 | # add "$Config{installarchlib}/CORE" to default search path |
230 | push @libpath, "$Config{installarchlib}/CORE"; |
231 | |
944acd49 |
232 | foreach (Text::ParseWords::quotewords('\s+', 0, $potential_libs)){ |
3e3baf6d |
233 | |
944acd49 |
234 | $thislib = $_; |
235 | |
236 | # see if entry is a flag |
237 | if (/^:\w+$/) { |
238 | $search = 0 if lc eq ':nosearch'; |
239 | $search = 1 if lc eq ':search'; |
240 | warn "Ignoring unknown flag '$thislib'\n" |
241 | if $verbose and !/^:(no)?(search|default)$/i; |
242 | next; |
243 | } |
244 | |
245 | # if searching is disabled, do compiler-specific translations |
246 | unless ($search) { |
944acd49 |
247 | s/^-l(.+)$/$1.lib/ unless $GC; |
b11c3c9f |
248 | s/^-L/-libpath:/ if $VC; |
944acd49 |
249 | push(@extralibs, $_); |
250 | $found++; |
251 | next; |
252 | } |
253 | |
254 | # handle possible linker path arguments |
255 | if (s/^-L// and not -d) { |
256 | warn "$thislib ignored, directory does not exist\n" |
e611f912 |
257 | if $verbose; |
3e3baf6d |
258 | next; |
259 | } |
944acd49 |
260 | elsif (-d) { |
261 | unless ($self->file_name_is_absolute($_)) { |
262 | warn "Warning: '$thislib' changed to '-L$pwd/$_'\n"; |
263 | $_ = $self->catdir($pwd,$_); |
3e3baf6d |
264 | } |
944acd49 |
265 | push(@searchpath, $_); |
3e3baf6d |
266 | next; |
267 | } |
268 | |
944acd49 |
269 | # handle possible library arguments |
270 | if (s/^-l// and $GC and !/^lib/i) { |
271 | $_ = "lib$_"; |
2d7a9237 |
272 | } |
944acd49 |
273 | $_ .= $libext if !/\Q$libext\E$/i; |
274 | |
944acd49 |
275 | my $secondpass = 0; |
87de1672 |
276 | LOOKAGAIN: |
3e3baf6d |
277 | |
d9b182a2 |
278 | # look for the file itself |
944acd49 |
279 | if (-f) { |
280 | warn "'$thislib' found as '$_'\n" if $verbose; |
d9b182a2 |
281 | $found++; |
944acd49 |
282 | push(@extralibs, $_); |
d9b182a2 |
283 | next; |
284 | } |
285 | |
e47a9bbc |
286 | my $found_lib = 0; |
3e3baf6d |
287 | foreach $thispth (@searchpath, @libpath){ |
944acd49 |
288 | unless (-f ($fullname="$thispth\\$_")) { |
289 | warn "'$thislib' not found as '$fullname'\n" if $verbose; |
3e3baf6d |
290 | next; |
291 | } |
944acd49 |
292 | warn "'$thislib' found as '$fullname'\n" if $verbose; |
3e3baf6d |
293 | $found++; |
294 | $found_lib++; |
295 | push(@extralibs, $fullname); |
296 | last; |
297 | } |
944acd49 |
298 | |
299 | # do another pass with (or without) leading 'lib' if they used -l |
e47a9bbc |
300 | if (!$found_lib and $thislib =~ /^-l/ and !$secondpass++) { |
301 | if ($GC) { |
302 | goto LOOKAGAIN if s/^lib//i; |
303 | } |
304 | elsif (!/^lib/i) { |
305 | $_ = "lib$_"; |
306 | goto LOOKAGAIN; |
307 | } |
944acd49 |
308 | } |
309 | |
310 | # give up |
fb73857a |
311 | warn "Note (probably harmless): " |
3e3baf6d |
312 | ."No library found for '$thislib'\n" |
313 | unless $found_lib>0; |
944acd49 |
314 | |
3e3baf6d |
315 | } |
944acd49 |
316 | |
3e3baf6d |
317 | return ('','','','') unless $found; |
ecc90c0e |
318 | |
319 | # make sure paths with spaces are properly quoted |
320 | @extralibs = map { (/\s/ && !/^".*"$/) ? qq["$_"] : $_ } @extralibs; |
3e3baf6d |
321 | $lib = join(' ',@extralibs); |
42ab721c |
322 | |
323 | # normalize back to backward slashes (to help braindead tools) |
324 | # XXX this may break equally braindead GNU tools that don't understand |
325 | # backslashes, either. Seems like one can't win here. Cursed be CP/M. |
326 | $lib =~ s,/,\\,g; |
327 | |
fb73857a |
328 | warn "Result: $lib\n" if $verbose; |
3e3baf6d |
329 | wantarray ? ($lib, '', $lib, '') : $lib; |
330 | } |
331 | |
55497cff |
332 | |
333 | sub _vms_ext { |
334 | my($self, $potential_libs,$verbose) = @_; |
09b7f37c |
335 | my(@crtls,$crtlstr); |
336 | my($dbgqual) = $self->{OPTIMIZE} || $Config{'optimize'} || |
337 | $self->{CCFLAS} || $Config{'ccflags'}; |
338 | @crtls = ( ($dbgqual =~ m-/Debug-i ? $Config{'dbgprefix'} : '') |
339 | . 'PerlShr/Share' ); |
340 | push(@crtls, grep { not /\(/ } split /\s+/, $Config{'libs'}); |
341 | push(@crtls, grep { not /\(/ } split /\s+/, $Config{'libc'}); |
342 | # In general, we pass through the basic libraries from %Config unchanged. |
343 | # The one exception is that if we're building in the Perl source tree, and |
344 | # a library spec could be resolved via a logical name, we go to some trouble |
345 | # to insure that the copy in the local tree is used, rather than one to |
346 | # which a system-wide logical may point. |
347 | if ($self->{PERL_SRC}) { |
348 | my($lib,$locspec,$type); |
349 | foreach $lib (@crtls) { |
350 | if (($locspec,$type) = $lib =~ m-^([\w$\-]+)(/\w+)?- and $locspec =~ /perl/i) { |
351 | if (lc $type eq '/share') { $locspec .= $Config{'exe_ext'}; } |
352 | elsif (lc $type eq '/library') { $locspec .= $Config{'lib_ext'}; } |
353 | else { $locspec .= $Config{'obj_ext'}; } |
354 | $locspec = $self->catfile($self->{PERL_SRC},$locspec); |
355 | $lib = "$locspec$type" if -e $locspec; |
356 | } |
357 | } |
358 | } |
359 | $crtlstr = @crtls ? join(' ',@crtls) : ''; |
55497cff |
360 | |
09b7f37c |
361 | unless ($potential_libs) { |
362 | warn "Result:\n\tEXTRALIBS: \n\tLDLOADLIBS: $crtlstr\n" if $verbose; |
363 | return ('', '', $crtlstr, ''); |
364 | } |
365 | |
562a7b0c |
366 | my(@dirs,@libs,$dir,$lib,%found,@fndlibs,$ldlib); |
55497cff |
367 | my $cwd = cwd(); |
368 | my($so,$lib_ext,$obj_ext) = @Config{'so','lib_ext','obj_ext'}; |
369 | # List of common Unix library names and there VMS equivalents |
370 | # (VMS equivalent of '' indicates that the library is automatially |
371 | # searched by the linker, and should be skipped here.) |
372 | my %libmap = ( 'm' => '', 'f77' => '', 'F77' => '', 'V77' => '', 'c' => '', |
373 | 'malloc' => '', 'crypt' => '', 'resolv' => '', 'c_s' => '', |
374 | 'socket' => '', 'X11' => 'DECW$XLIBSHR', |
375 | 'Xt' => 'DECW$XTSHR', 'Xm' => 'DECW$XMLIBSHR', |
376 | 'Xmu' => 'DECW$XMULIBSHR'); |
377 | if ($Config{'vms_cc_type'} ne 'decc') { $libmap{'curses'} = 'VAXCCURSE'; } |
378 | |
fb73857a |
379 | warn "Potential libraries are '$potential_libs'\n" if $verbose; |
55497cff |
380 | |
381 | # First, sort out directories and library names in the input |
382 | foreach $lib (split ' ',$potential_libs) { |
383 | push(@dirs,$1), next if $lib =~ /^-L(.*)/; |
384 | push(@dirs,$lib), next if $lib =~ /[:>\]]$/; |
385 | push(@dirs,$lib), next if -d $lib; |
386 | push(@libs,$1), next if $lib =~ /^-l(.*)/; |
387 | push(@libs,$lib); |
388 | } |
389 | push(@dirs,split(' ',$Config{'libpth'})); |
390 | |
391 | # Now make sure we've got VMS-syntax absolute directory specs |
392 | # (We don't, however, check whether someone's hidden a relative |
393 | # path in a logical name.) |
394 | foreach $dir (@dirs) { |
395 | unless (-d $dir) { |
fb73857a |
396 | warn "Skipping nonexistent Directory $dir\n" if $verbose > 1; |
55497cff |
397 | $dir = ''; |
398 | next; |
399 | } |
fb73857a |
400 | warn "Resolving directory $dir\n" if $verbose; |
55497cff |
401 | if ($self->file_name_is_absolute($dir)) { $dir = $self->fixpath($dir,1); } |
402 | else { $dir = $self->catdir($cwd,$dir); } |
403 | } |
404 | @dirs = grep { length($_) } @dirs; |
405 | unshift(@dirs,''); # Check each $lib without additions first |
406 | |
407 | LIB: foreach $lib (@libs) { |
408 | if (exists $libmap{$lib}) { |
409 | next unless length $libmap{$lib}; |
410 | $lib = $libmap{$lib}; |
411 | } |
412 | |
413 | my(@variants,$variant,$name,$test,$cand); |
414 | my($ctype) = ''; |
415 | |
416 | # If we don't have a file type, consider it a possibly abbreviated name and |
417 | # check for common variants. We try these first to grab libraries before |
418 | # a like-named executable image (e.g. -lperl resolves to perlshr.exe |
419 | # before perl.exe). |
420 | if ($lib !~ /\.[^:>\]]*$/) { |
421 | push(@variants,"${lib}shr","${lib}rtl","${lib}lib"); |
422 | push(@variants,"lib$lib") if $lib !~ /[:>\]]/; |
423 | } |
424 | push(@variants,$lib); |
fb73857a |
425 | warn "Looking for $lib\n" if $verbose; |
55497cff |
426 | foreach $variant (@variants) { |
427 | foreach $dir (@dirs) { |
428 | my($type); |
429 | |
430 | $name = "$dir$variant"; |
fb73857a |
431 | warn "\tChecking $name\n" if $verbose > 2; |
55497cff |
432 | if (-f ($test = VMS::Filespec::rmsexpand($name))) { |
433 | # It's got its own suffix, so we'll have to figure out the type |
562a7b0c |
434 | if ($test =~ /(?:$so|exe)$/i) { $type = 'SHR'; } |
435 | elsif ($test =~ /(?:$lib_ext|olb)$/i) { $type = 'OLB'; } |
55497cff |
436 | elsif ($test =~ /(?:$obj_ext|obj)$/i) { |
fb73857a |
437 | warn "Note (probably harmless): " |
f3d9a6ba |
438 | ."Plain object file $test found in library list\n"; |
562a7b0c |
439 | $type = 'OBJ'; |
55497cff |
440 | } |
441 | else { |
fb73857a |
442 | warn "Note (probably harmless): " |
f3d9a6ba |
443 | ."Unknown library type for $test; assuming shared\n"; |
562a7b0c |
444 | $type = 'SHR'; |
55497cff |
445 | } |
446 | } |
447 | elsif (-f ($test = VMS::Filespec::rmsexpand($name,$so)) or |
448 | -f ($test = VMS::Filespec::rmsexpand($name,'.exe'))) { |
562a7b0c |
449 | $type = 'SHR'; |
55497cff |
450 | $name = $test unless $test =~ /exe;?\d*$/i; |
451 | } |
452 | elsif (not length($ctype) and # If we've got a lib already, don't bother |
453 | ( -f ($test = VMS::Filespec::rmsexpand($name,$lib_ext)) or |
454 | -f ($test = VMS::Filespec::rmsexpand($name,'.olb')))) { |
562a7b0c |
455 | $type = 'OLB'; |
55497cff |
456 | $name = $test unless $test =~ /olb;?\d*$/i; |
457 | } |
458 | elsif (not length($ctype) and # If we've got a lib already, don't bother |
459 | ( -f ($test = VMS::Filespec::rmsexpand($name,$obj_ext)) or |
460 | -f ($test = VMS::Filespec::rmsexpand($name,'.obj')))) { |
fb73857a |
461 | warn "Note (probably harmless): " |
f3d9a6ba |
462 | ."Plain object file $test found in library list\n"; |
562a7b0c |
463 | $type = 'OBJ'; |
55497cff |
464 | $name = $test unless $test =~ /obj;?\d*$/i; |
465 | } |
466 | if (defined $type) { |
467 | $ctype = $type; $cand = $name; |
562a7b0c |
468 | last if $ctype eq 'SHR'; |
55497cff |
469 | } |
470 | } |
471 | if ($ctype) { |
562a7b0c |
472 | # This has to precede any other CRTLs, so just make it first |
473 | if ($cand eq 'VAXCCURSE') { unshift @{$found{$ctype}}, $cand; } |
474 | else { push @{$found{$ctype}}, $cand; } |
fb73857a |
475 | warn "\tFound as $cand (really $test), type $ctype\n" if $verbose > 1; |
55497cff |
476 | next LIB; |
477 | } |
478 | } |
fb73857a |
479 | warn "Note (probably harmless): " |
f3d9a6ba |
480 | ."No library found for $lib\n"; |
55497cff |
481 | } |
482 | |
562a7b0c |
483 | push @fndlibs, @{$found{OBJ}} if exists $found{OBJ}; |
484 | push @fndlibs, map { "$_/Library" } @{$found{OLB}} if exists $found{OLB}; |
485 | push @fndlibs, map { "$_/Share" } @{$found{SHR}} if exists $found{SHR}; |
486 | $lib = join(' ',@fndlibs); |
09b7f37c |
487 | |
488 | $ldlib = $crtlstr ? "$lib $crtlstr" : $lib; |
489 | warn "Result:\n\tEXTRALIBS: $lib\n\tLDLOADLIBS: $ldlib\n" if $verbose; |
490 | wantarray ? ($lib, '', $ldlib, '') : $lib; |
55497cff |
491 | } |
492 | |
005c1a0e |
493 | 1; |
c2e89b3d |
494 | |
864a5fa8 |
495 | __END__ |
cb1a09d0 |
496 | |
864a5fa8 |
497 | =head1 NAME |
498 | |
499 | ExtUtils::Liblist - determine libraries to use and how to use them |
500 | |
501 | =head1 SYNOPSIS |
502 | |
503 | C<require ExtUtils::Liblist;> |
504 | |
e611f912 |
505 | C<ExtUtils::Liblist::ext($self, $potential_libs, $verbose);> |
864a5fa8 |
506 | |
507 | =head1 DESCRIPTION |
508 | |
509 | This utility takes a list of libraries in the form C<-llib1 -llib2 |
510 | -llib3> and prints out lines suitable for inclusion in an extension |
511 | Makefile. Extra library paths may be included with the form |
512 | C<-L/another/path> this will affect the searches for all subsequent |
513 | libraries. |
514 | |
515 | It returns an array of four scalar values: EXTRALIBS, BSLOADLIBS, |
3e3baf6d |
516 | LDLOADLIBS, and LD_RUN_PATH. Some of these don't mean anything |
517 | on VMS and Win32. See the details about those platform specifics |
518 | below. |
864a5fa8 |
519 | |
520 | Dependent libraries can be linked in one of three ways: |
521 | |
522 | =over 2 |
523 | |
524 | =item * For static extensions |
525 | |
526 | by the ld command when the perl binary is linked with the extension |
527 | library. See EXTRALIBS below. |
528 | |
529 | =item * For dynamic extensions |
530 | |
531 | by the ld command when the shared object is built/linked. See |
532 | LDLOADLIBS below. |
533 | |
534 | =item * For dynamic extensions |
535 | |
536 | by the DynaLoader when the shared object is loaded. See BSLOADLIBS |
537 | below. |
538 | |
539 | =back |
540 | |
541 | =head2 EXTRALIBS |
542 | |
543 | List of libraries that need to be linked with when linking a perl |
146174a9 |
544 | binary which includes this extension. Only those libraries that |
864a5fa8 |
545 | actually exist are included. These are written to a file and used |
546 | when linking perl. |
547 | |
548 | =head2 LDLOADLIBS and LD_RUN_PATH |
549 | |
550 | List of those libraries which can or must be linked into the shared |
551 | library when created using ld. These may be static or dynamic |
552 | libraries. LD_RUN_PATH is a colon separated list of the directories |
553 | in LDLOADLIBS. It is passed as an environment variable to the process |
554 | that links the shared library. |
555 | |
556 | =head2 BSLOADLIBS |
557 | |
558 | List of those libraries that are needed but can be linked in |
559 | dynamically at run time on this platform. SunOS/Solaris does not need |
560 | this because ld records the information (from LDLOADLIBS) into the |
561 | object file. This list is used to create a .bs (bootstrap) file. |
562 | |
563 | =head1 PORTABILITY |
564 | |
565 | This module deals with a lot of system dependencies and has quite a |
146174a9 |
566 | few architecture specific C<if>s in the code. |
864a5fa8 |
567 | |
55497cff |
568 | =head2 VMS implementation |
569 | |
570 | The version of ext() which is executed under VMS differs from the |
571 | Unix-OS/2 version in several respects: |
572 | |
573 | =over 2 |
574 | |
575 | =item * |
576 | |
577 | Input library and path specifications are accepted with or without the |
de592821 |
578 | C<-l> and C<-L> prefixes used by Unix linkers. If neither prefix is |
55497cff |
579 | present, a token is considered a directory to search if it is in fact |
580 | a directory, and a library to search for otherwise. Authors who wish |
581 | their extensions to be portable to Unix or OS/2 should use the Unix |
582 | prefixes, since the Unix-OS/2 version of ext() requires them. |
583 | |
584 | =item * |
585 | |
586 | Wherever possible, shareable images are preferred to object libraries, |
587 | and object libraries to plain object files. In accordance with VMS |
588 | naming conventions, ext() looks for files named I<lib>shr and I<lib>rtl; |
de592821 |
589 | it also looks for I<lib>lib and libI<lib> to accommodate Unix conventions |
55497cff |
590 | used in some ported software. |
591 | |
592 | =item * |
593 | |
594 | For each library that is found, an appropriate directive for a linker options |
595 | file is generated. The return values are space-separated strings of |
596 | these directives, rather than elements used on the linker command line. |
597 | |
598 | =item * |
599 | |
09b7f37c |
600 | LDLOADLIBS contains both the libraries found based on C<$potential_libs> and |
601 | the CRTLs, if any, specified in Config.pm. EXTRALIBS contains just those |
602 | libraries found based on C<$potential_libs>. BSLOADLIBS and LD_RUN_PATH |
603 | are always empty. |
55497cff |
604 | |
605 | =back |
606 | |
607 | In addition, an attempt is made to recognize several common Unix library |
608 | names, and filter them out or convert them to their VMS equivalents, as |
609 | appropriate. |
610 | |
611 | In general, the VMS version of ext() should properly handle input from |
612 | extensions originally designed for a Unix or VMS environment. If you |
613 | encounter problems, or discover cases where the search could be improved, |
614 | please let us know. |
615 | |
3e3baf6d |
616 | =head2 Win32 implementation |
617 | |
618 | The version of ext() which is executed under Win32 differs from the |
619 | Unix-OS/2 version in several respects: |
620 | |
621 | =over 2 |
622 | |
623 | =item * |
624 | |
944acd49 |
625 | If C<$potential_libs> is empty, the return value will be empty. |
626 | Otherwise, the libraries specified by C<$Config{libs}> (see Config.pm) |
627 | will be appended to the list of C<$potential_libs>. The libraries |
b11c3c9f |
628 | will be searched for in the directories specified in C<$potential_libs>, |
629 | C<$Config{libpth}>, and in C<$Config{installarchlib}/CORE>. |
630 | For each library that is found, a space-separated list of fully qualified |
631 | library pathnames is generated. |
944acd49 |
632 | |
633 | =item * |
634 | |
3e3baf6d |
635 | Input library and path specifications are accepted with or without the |
de592821 |
636 | C<-l> and C<-L> prefixes used by Unix linkers. |
944acd49 |
637 | |
638 | An entry of the form C<-La:\foo> specifies the C<a:\foo> directory to look |
639 | for the libraries that follow. |
640 | |
641 | An entry of the form C<-lfoo> specifies the library C<foo>, which may be |
642 | spelled differently depending on what kind of compiler you are using. If |
643 | you are using GCC, it gets translated to C<libfoo.a>, but for other win32 |
644 | compilers, it becomes C<foo.lib>. If no files are found by those translated |
645 | names, one more attempt is made to find them using either C<foo.a> or |
646 | C<libfoo.lib>, depending on whether GCC or some other win32 compiler is |
647 | being used, respectively. |
648 | |
649 | If neither the C<-L> or C<-l> prefix is present in an entry, the entry is |
650 | considered a directory to search if it is in fact a directory, and a |
651 | library to search for otherwise. The C<$Config{lib_ext}> suffix will |
652 | be appended to any entries that are not directories and don't already have |
653 | the suffix. |
654 | |
de592821 |
655 | Note that the C<-L> and C<-l> prefixes are B<not required>, but authors |
944acd49 |
656 | who wish their extensions to be portable to Unix or OS/2 should use the |
657 | prefixes, since the Unix-OS/2 version of ext() requires them. |
3e3baf6d |
658 | |
659 | =item * |
660 | |
661 | Entries cannot be plain object files, as many Win32 compilers will |
662 | not handle object files in the place of libraries. |
663 | |
664 | =item * |
665 | |
944acd49 |
666 | Entries in C<$potential_libs> beginning with a colon and followed by |
667 | alphanumeric characters are treated as flags. Unknown flags will be ignored. |
668 | |
669 | An entry that matches C</:nodefault/i> disables the appending of default |
670 | libraries found in C<$Config{libs}> (this should be only needed very rarely). |
671 | |
672 | An entry that matches C</:nosearch/i> disables all searching for |
673 | the libraries specified after it. Translation of C<-Lfoo> and |
674 | C<-lfoo> still happens as appropriate (depending on compiler being used, |
675 | as reflected by C<$Config{cc}>), but the entries are not verified to be |
676 | valid files or directories. |
3e3baf6d |
677 | |
e47a9bbc |
678 | An entry that matches C</:search/i> reenables searching for |
679 | the libraries specified after it. You can put it at the end to |
680 | enable searching for default libraries specified by C<$Config{libs}>. |
681 | |
3e3baf6d |
682 | =item * |
683 | |
684 | The libraries specified may be a mixture of static libraries and |
685 | import libraries (to link with DLLs). Since both kinds are used |
146174a9 |
686 | pretty transparently on the Win32 platform, we do not attempt to |
3e3baf6d |
687 | distinguish between them. |
688 | |
689 | =item * |
690 | |
691 | LDLOADLIBS and EXTRALIBS are always identical under Win32, and BSLOADLIBS |
692 | and LD_RUN_PATH are always empty (this may change in future). |
693 | |
ecc90c0e |
694 | =item * |
695 | |
696 | You must make sure that any paths and path components are properly |
697 | surrounded with double-quotes if they contain spaces. For example, |
698 | C<$potential_libs> could be (literally): |
699 | |
700 | "-Lc:\Program Files\vc\lib" msvcrt.lib "la test\foo bar.lib" |
701 | |
702 | Note how the first and last entries are protected by quotes in order |
703 | to protect the spaces. |
704 | |
944acd49 |
705 | =item * |
706 | |
707 | Since this module is most often used only indirectly from extension |
708 | C<Makefile.PL> files, here is an example C<Makefile.PL> entry to add |
e47a9bbc |
709 | a library to the build process for an extension: |
944acd49 |
710 | |
711 | LIBS => ['-lgl'] |
712 | |
713 | When using GCC, that entry specifies that MakeMaker should first look |
714 | for C<libgl.a> (followed by C<gl.a>) in all the locations specified by |
715 | C<$Config{libpth}>. |
716 | |
717 | When using a compiler other than GCC, the above entry will search for |
718 | C<gl.lib> (followed by C<libgl.lib>). |
719 | |
e47a9bbc |
720 | If the library happens to be in a location not in C<$Config{libpth}>, |
721 | you need: |
722 | |
723 | LIBS => ['-Lc:\gllibs -lgl'] |
724 | |
944acd49 |
725 | Here is a less often used example: |
726 | |
727 | LIBS => ['-lgl', ':nosearch -Ld:\mesalibs -lmesa -luser32'] |
728 | |
729 | This specifies a search for library C<gl> as before. If that search |
730 | fails to find the library, it looks at the next item in the list. The |
731 | C<:nosearch> flag will prevent searching for the libraries that follow, |
732 | so it simply returns the value as C<-Ld:\mesalibs -lmesa -luser32>, |
733 | since GCC can use that value as is with its linker. |
734 | |
735 | When using the Visual C compiler, the second item is returned as |
736 | C<-libpath:d:\mesalibs mesa.lib user32.lib>. |
737 | |
738 | When using the Borland compiler, the second item is returned as |
e47a9bbc |
739 | C<-Ld:\mesalibs mesa.lib user32.lib>, and MakeMaker takes care of |
740 | moving the C<-Ld:\mesalibs> to the correct place in the linker |
741 | command line. |
944acd49 |
742 | |
3e3baf6d |
743 | =back |
744 | |
745 | |
864a5fa8 |
746 | =head1 SEE ALSO |
747 | |
748 | L<ExtUtils::MakeMaker> |
749 | |
750 | =cut |
751 | |