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Editing: Miniperl.pm
#!./perl -w package ExtUtils::Miniperl; use strict; require Exporter; use ExtUtils::Embed 1.31, qw(xsi_header xsi_protos xsi_body); use vars qw($VERSION @ISA @EXPORT); @ISA = qw(Exporter); @EXPORT = qw(writemain); $VERSION = '1.06'; # blead will run this with miniperl, hence we can't use autodie or File::Temp my $temp; END { return if !defined $temp || !-e $temp; unlink $temp or warn "Can't unlink '$temp': $!"; } sub writemain{ my ($fh, $real); if (ref $_[0] eq 'SCALAR') { $real = ${+shift}; $temp = $real; $temp =~ s/(?:.c)?\z/.new/; open $fh, '>', $temp or die "Can't open '$temp' for writing: $!"; } elsif (ref $_[0]) { $fh = shift; } else { $fh = \*STDOUT; } my(@exts) = @_; printf $fh <<'EOF!HEAD', xsi_header(); /* miniperlmain.c or perlmain.c - a generated file * * Copyright (C) 1994, 1995, 1996, 1997, 1999, 2000, 2001, 2002, 2003, * 2004, 2005, 2006, 2007, 2016 by Larry Wall and others * * You may distribute under the terms of either the GNU General Public * License or the Artistic License, as specified in the README file. * */ /* * The Road goes ever on and on * Down from the door where it began. * * [Bilbo on p.35 of _The Lord of the Rings_, I/i: "A Long-Expected Party"] * [Frodo on p.73 of _The Lord of the Rings_, I/iii: "Three Is Company"] */ /* This file contains the main() function for the perl interpreter. * Note that miniperlmain.c contains main() for the 'miniperl' binary, * while perlmain.c contains main() for the 'perl' binary. The typical * difference being that the latter includes Dynaloader. * * Miniperl is like perl except that it does not support dynamic loading, * and in fact is used to build the dynamic modules needed for the 'real' * perl executable. * * The content of the body of this generated file is mostly contained * in Miniperl.pm - edit that file if you want to change anything. * miniperlmain.c is generated by running regen/miniperlmain.pl.pl, while * perlmain.c is built automatically by Makefile (so the former is * included in the tarball while the latter isn't). */ #ifdef OEMVS #ifdef MYMALLOC /* sbrk is limited to first heap segment so make it big */ #pragma runopts(HEAP(8M,500K,ANYWHERE,KEEP,8K,4K) STACK(,,ANY,) ALL31(ON)) #else #pragma runopts(HEAP(2M,500K,ANYWHERE,KEEP,8K,4K) STACK(,,ANY,) ALL31(ON)) #endif #endif #define PERL_IN_MINIPERLMAIN_C %s static void xs_init (pTHX); static PerlInterpreter *my_perl; #if defined(PERL_GLOBAL_STRUCT_PRIVATE) /* The static struct perl_vars* may seem counterproductive since the * whole idea PERL_GLOBAL_STRUCT_PRIVATE was to avoid statics, but note * that this static is not in the shared perl library, the globals PL_Vars * and PL_VarsPtr will stay away. */ static struct perl_vars* my_plvarsp; struct perl_vars* Perl_GetVarsPrivate(void) { return my_plvarsp; } #endif #ifdef NO_ENV_ARRAY_IN_MAIN extern char **environ; int main(int argc, char **argv) #else int main(int argc, char **argv, char **env) #endif { int exitstatus, i; #ifdef PERL_GLOBAL_STRUCT struct perl_vars *my_vars = init_global_struct(); # ifdef PERL_GLOBAL_STRUCT_PRIVATE int veto; my_plvarsp = my_vars; # endif #endif /* PERL_GLOBAL_STRUCT */ #ifndef NO_ENV_ARRAY_IN_MAIN PERL_UNUSED_ARG(env); #endif #ifndef PERL_USE_SAFE_PUTENV PL_use_safe_putenv = FALSE; #endif /* PERL_USE_SAFE_PUTENV */ /* if user wants control of gprof profiling off by default */ /* noop unless Configure is given -Accflags=-DPERL_GPROF_CONTROL */ PERL_GPROF_MONCONTROL(0); #ifdef NO_ENV_ARRAY_IN_MAIN PERL_SYS_INIT3(&argc,&argv,&environ); #else PERL_SYS_INIT3(&argc,&argv,&env); #endif #if defined(USE_ITHREADS) /* XXX Ideally, this should really be happening in perl_alloc() or * perl_construct() to keep libperl.a transparently fork()-safe. * It is currently done here only because Apache/mod_perl have * problems due to lack of a call to cancel pthread_atfork() * handlers when shared objects that contain the handlers may * be dlclose()d. This forces applications that embed perl to * call PTHREAD_ATFORK() explicitly, but if and only if it hasn't * been called at least once before in the current process. * --GSAR 2001-07-20 */ PTHREAD_ATFORK(Perl_atfork_lock, Perl_atfork_unlock, Perl_atfork_unlock); #endif PERL_SYS_FPU_INIT; if (!PL_do_undump) { my_perl = perl_alloc(); if (!my_perl) exit(1); perl_construct(my_perl); PL_perl_destruct_level = 0; } PL_exit_flags |= PERL_EXIT_DESTRUCT_END; exitstatus = perl_parse(my_perl, xs_init, argc, argv, (char **)NULL); if (!exitstatus) perl_run(my_perl); #ifndef PERL_MICRO /* Unregister our signal handler before destroying my_perl */ for (i = 1; PL_sig_name[i]; i++) { if (rsignal_state(PL_sig_num[i]) == (Sighandler_t) PL_csighandlerp) { rsignal(PL_sig_num[i], (Sighandler_t) SIG_DFL); } } #endif exitstatus = perl_destruct(my_perl); perl_free(my_perl); #if defined(USE_ENVIRON_ARRAY) && defined(PERL_TRACK_MEMPOOL) && !defined(NO_ENV_ARRAY_IN_MAIN) /* * The old environment may have been freed by perl_free() * when PERL_TRACK_MEMPOOL is defined, but without having * been restored by perl_destruct() before (this is only * done if destruct_level > 0). * * It is important to have a valid environment for atexit() * routines that are eventually called. */ environ = env; #endif PERL_SYS_TERM(); #ifdef PERL_GLOBAL_STRUCT # ifdef PERL_GLOBAL_STRUCT_PRIVATE veto = my_plvarsp->Gveto_cleanup; # endif free_global_struct(my_vars); # ifdef PERL_GLOBAL_STRUCT_PRIVATE if (!veto) my_plvarsp = NULL; /* Remember, functions registered with atexit() can run after this point, and may access "global" variables, and hence end up calling Perl_GetVarsPrivate() */ #endif #endif /* PERL_GLOBAL_STRUCT */ exit(exitstatus); } /* Register any extra external extensions */ EOF!HEAD print $fh xsi_protos(@exts), <<'EOT', xsi_body(@exts), "}\n"; static void xs_init(pTHX) { EOT if ($real) { close $fh or die "Can't close '$temp': $!"; rename $temp, $real or die "Can't rename '$temp' to '$real': $!"; } } 1; __END__ =head1 NAME ExtUtils::Miniperl - write the C code for miniperlmain.c and perlmain.c =head1 SYNOPSIS use ExtUtils::Miniperl; writemain(@directories); # or writemain($fh, @directories); # or writemain(\$filename, @directories); =head1 DESCRIPTION C<writemain()> takes an argument list of zero or more directories containing archive libraries that relate to perl modules and should be linked into a new perl binary. It writes a corresponding F<miniperlmain.c> or F<perlmain.c> file that is a plain C file containing all the bootstrap code to make the modules associated with the libraries available from within perl. If the first argument to C<writemain()> is a reference to a scalar it is used as the filename to open for output. Any other reference is used as the filehandle to write to. Otherwise output defaults to C<STDOUT>. The typical usage is from within perl's own Makefile (to build F<perlmain.c>) or from F<regen/miniperlmain.pl> (to build miniperlmain.c). So under normal circumstances you won't have to deal with this module directly. =head1 SEE ALSO L<ExtUtils::MakeMaker> =cut # ex: set ts=8 sts=4 sw=4 et:
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