4 use File::Basename qw(&basename &dirname);
6 # List explicitly here the variables you want Configure to
7 # generate. Metaconfig only looks for shell variables, so you
8 # have to mention them as if they were shell variables, not
9 # %Config entries. Thus you write
11 # to ensure Configure will look for $Config{startperl}.
13 # This forces PL files to create target in same directory as PL file.
14 # This is so that make depend always knows where to find PL derivatives.
16 ($file = basename($0)) =~ s/\.PL$//;
18 if ($Config{'osname'} eq 'VMS' or
19 $Config{'osname'} eq 'OS2'); # "case-forgiving"
21 open OUT,">$file" or die "Can't create $file: $!";
23 print "Extracting $file (with variable substitutions)\n";
25 # In this section, perl variables will be expanded during extraction.
26 # You can use $Config{...} to use Configure variables.
28 print OUT <<"!GROK!THIS!";
30 eval 'exec perl -S \$0 "\$@"'
34 # In the following, perl variables are not expanded during extraction.
36 print OUT <<'!NO!SUBS!';
40 h2xs - convert .h C header files to Perl extensions
44 B<h2xs> [B<-APcf>] [B<-v> version] [B<-n> module_name] [headerfile [extra_libraries]]
50 I<h2xs> builds a Perl extension from any C header file. The extension will
51 include functions which can be used to retrieve the value of any #define
52 statement which was in the C header.
54 The I<module_name> will be used for the name of the extension. If
55 module_name is not supplied then the name of the header file will be used,
56 with the first character capitalized.
58 If the extension might need extra libraries, they should be included
59 here. The extension Makefile.PL will take care of checking whether
60 the libraries actually exist and how they should be loaded.
61 The extra libraries should be specified in the form -lm -lposix, etc,
62 just as on the cc command line. By default, the Makefile.PL will
63 search through the library path determined by Configure. That path
64 can be augmented by including arguments of the form B<-L/another/library/path>
65 in the extra-libraries argument.
73 Omit all autoload facilities. This is the same as B<-c> but also removes the
74 S<C<require AutoLoader>> statement from the .pm file.
78 Omit the autogenerated stub POD section.
82 Omit C<constant()> from the .xs file and corresponding specialised
83 C<AUTOLOAD> from the .pm file.
87 Allows an extension to be created for a header even if that header is
88 not found in /usr/include.
92 Print the usage, help and version for this h2xs and exit.
94 =item B<-n> I<module_name>
96 Specifies a name to be used for the extension, e.g., S<-n RPC::DCE>
98 =item B<-v> I<version>
100 Specify a version number for this extension. This version number is added
101 to the templates. The default is 0.01.
108 # Default behavior, extension is Rusers
111 # Same, but extension is RUSERS
112 h2xs -n RUSERS rpcsvc/rusers
114 # Extension is rpcsvc::rusers. Still finds <rpcsvc/rusers.h>
117 # Extension is ONC::RPC. Still finds <rpcsvc/rusers.h>
118 h2xs -n ONC::RPC rpcsvc/rusers
120 # Without constant() or AUTOLOAD
121 h2xs -c rpcsvc/rusers
123 # Creates templates for an extension named RPC
126 # Extension is ONC::RPC.
129 # Makefile.PL will look for library -lrpc in
130 # additional directory /opt/net/lib
131 h2xs rpcsvc/rusers -L/opt/net/lib -lrpc
136 No environment variables are used.
140 Larry Wall and others
144 L<perl>, L<perlxstut>, L<ExtUtils::MakeMaker>, and L<AutoLoader>.
148 The usual warnings if it can't read or write the files involved.
152 my( $H2XS_VERSION ) = '$Revision: 1.12 $' =~ /\$Revision:\s+([^\s]+)/;
153 my $TEMPLATE_VERSION = '0.01';
159 die "h2xs [-APcfh] [-v version] [-n module_name] [headerfile [extra_libraries]]
160 version: $H2XS_VERSION
161 -f Force creation of the extension even if the C header does not exist.
162 -n Specify a name to use for the extension (recommended).
163 -c Omit the constant() function and specialised AUTOLOAD from the XS file.
164 -A Omit all autoloading facilities (implies -c).
165 -P Omit the stub POD section.
166 -v Specify a version number for this extension.
167 -h Display this help message
169 are any libraries that might be needed for loading the
170 extension, e.g. -lm would try to link in the math library.
175 getopts("APcfhv:n:") || usage;
180 $TEMPLATE_VERSION = $opt_v;
182 $opt_c = 1 if $opt_A;
185 $extralibs = "@ARGV";
187 usage "Must supply header file or module name\n"
188 unless ($path_h or $opt_n);
193 if( $path_h =~ s#::#/#g && $opt_n ){
194 warn "Nesting of headerfile ignored with -n\n";
196 $path_h .= ".h" unless $path_h =~ /\.h$/;
197 $path_h = "/usr/include/$path_h" unless $path_h =~ m#^[./]#;
198 die "Can't find $path_h\n" if ( ! $opt_f && ! -f $path_h );
200 # Scan the header file (we should deal with nested header files)
201 # Record the names of simple #define constants into const_names
202 # Function prototypes are not (currently) processed.
203 open(CH, "<$path_h") || die "Can't open $path_h: $!\n";
205 if (/^#[ \t]*define\s+(\w+)\b\s*[^("]/) {
207 next if /^_.*_h_*$/i; # special case, but for what?
212 @const_names = sort keys %const_names;
216 $module = $opt_n || do {
225 (chdir 'ext', $ext = 'ext/') if -d 'ext';
227 if( $module =~ /::/ ){
229 @modparts = split(/::/,$module);
230 $modfname = $modparts[-1];
231 $modpname = join('/',@modparts);
236 $modfname = $modpname = $module;
240 die "Won't overwrite existing $ext$modpname\n" if -e $modpname;
241 # quick hack, should really loop over @modparts
242 mkdir($modparts[0], 0777) if $nested;
243 mkdir($modpname, 0777);
244 chdir($modpname) || die "Can't chdir $ext$modpname: $!\n";
246 open(XS, ">$modfname.xs") || die "Can't create $ext$modpname/$modfname.xs: $!\n";
247 open(PM, ">$modfname.pm") || die "Can't create $ext$modpname/$modfname.pm: $!\n";
250 warn "Writing $ext$modpname/$modfname.pm\n";
265 if( $opt_c && ! $opt_A ){
266 # we won't have our own AUTOLOAD(), so we'll inherit it.
269 \@ISA = qw(Exporter AutoLoader DynaLoader);
273 # 1) we have our own AUTOLOAD(), so don't need to inherit it.
275 # 2) we don't want autoloading mentioned.
278 \@ISA = qw(Exporter DynaLoader);
283 # Items to export into callers namespace by default. Note: do not export
284 # names by default without a very good reason. Use EXPORT_OK instead.
285 # Do not simply export all your public functions/methods/constants.
289 \$VERSION = '$TEMPLATE_VERSION';
293 print PM <<"END" unless $opt_c;
295 # This AUTOLOAD is used to 'autoload' constants from the constant()
296 # XS function. If a constant is not found then control is passed
297 # to the AUTOLOAD in AutoLoader.
300 (\$constname = \$AUTOLOAD) =~ s/.*:://;
301 \$val = constant(\$constname, \@_ ? \$_[0] : 0);
303 if (\$! =~ /Invalid/) {
304 \$AutoLoader::AUTOLOAD = \$AUTOLOAD;
305 goto &AutoLoader::AUTOLOAD;
308 (\$pack,\$file,\$line) = caller;
309 die "Your vendor has not defined $module macro \$constname, used at \$file line \$line.\n";
312 eval "sub \$AUTOLOAD { \$val }";
319 bootstrap $module \$VERSION;
321 # Preloaded methods go here.
323 # Autoload methods go after __END__, and are processed by the autosplit program.
329 $author = "A. U. Thor";
330 $email = 'a.u.thor@a.galaxy.far.far.away';
332 $pod = <<"END" unless $opt_P;
333 ## Below is the stub of documentation for your module. You better edit it!
337 #$module - Perl extension for blah blah blah
346 #Stub documentation for $module was created by h2xs. It looks like the
347 #author of the extension was negligent enough to leave the stub
363 $pod =~ s/^\#//gm unless $opt_P;
364 print PM $pod unless $opt_P;
369 warn "Writing $ext$modpname/$modfname.xs\n";
385 $h =~ s#^/usr/include/##;
398 croak("$module::%s not implemented on this architecture", s);
411 my(@AZ, @az, @under);
413 foreach(@const_names){
414 @AZ = 'A' .. 'Z' if !@AZ && /^[A-Z]/;
415 @az = 'a' .. 'z' if !@az && /^[a-z]/;
416 @under = '_' if !@under && /^_/;
419 foreach $letter (@AZ, @az, @under) {
421 last if $letter eq 'a' && !@const_names;
423 print XS " case '$letter':\n";
425 while (substr($const_names[0],0,1) eq $letter) {
426 $name = shift(@const_names);
428 if (strEQ(name, "$name"))
453 # Now switch from C to XS by issuing the first MODULE declaration:
456 MODULE = $module PACKAGE = $module
460 # If a constant() function was written then output a corresponding
462 print XS <<"END" unless $opt_c;
474 warn "Writing $ext$modpname/Makefile.PL\n";
475 open(PL, ">Makefile.PL") || die "Can't create $ext$modpname/Makefile.PL: $!\n";
478 use ExtUtils::MakeMaker;
479 # See lib/ExtUtils/MakeMaker.pm for details of how to influence
480 # the contents of the Makefile that is written.
482 print PL "WriteMakefile(\n";
483 print PL " 'NAME' => '$module',\n";
484 print PL " 'VERSION' => '$TEMPLATE_VERSION',\n";
485 print PL " 'LIBS' => ['$extralibs'], # e.g., '-lm' \n";
486 print PL " 'DEFINE' => '', # e.g., '-DHAVE_SOMETHING' \n";
487 print PL " 'INC' => '', # e.g., '-I/usr/include/other' \n";
489 close(PL) || die "Can't close $ext$modpname/Makefile.PL: $!\n";
491 warn "Writing $ext$modpname/test.pl\n";
492 open(EX, ">test.pl") || die "Can't create $ext$modpname/test.pl: $!\n";
494 # Before `make install' is performed this script should be runnable with
495 # `make test'. After `make install' it should work as `perl test.pl'
497 ######################### We start with some black magic to print on failure.
499 # Change 1..1 below to 1..last_test_to_print .
500 # (It may become useful if the test is moved to ./t subdirectory.)
502 BEGIN {print "1..1\n";}
503 END {print "not ok 1\n" unless $loaded;}
512 ######################### End of black magic.
514 # Insert your test code below (better if it prints "ok 13"
515 # (correspondingly "not ok 13") depending on the success of chunk 13
519 close(EX) || die "Can't close $ext$modpname/test.pl: $!\n";
521 system '/bin/ls > MANIFEST' or system 'ls > MANIFEST';
524 close OUT or die "Can't close $file: $!";
525 chmod 0755, $file or die "Can't reset permissions for $file: $!\n";
526 exec("$Config{'eunicefix'} $file") if $Config{'eunicefix'} ne ':';