#!./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 = '1.01'; # 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 * * Copyright (C) 1994, 1995, 1996, 1997, 1999, 2000, 2001, 2002, 2003, * 2004, 2005, 2006, 2007, 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. * * 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. */ #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 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); return 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': $!"; } } 1; __END__ =head1 NAME ExtUtils::Miniperl - write the C code for perlmain.c =head1 SYNOPSIS use ExtUtils::Miniperl; writemain(@directories); # or writemain($fh, @directories); # or writemain(\$filename, @directories); =head1 DESCRIPTION C takes an argument list of directories containing archive libraries that relate to perl modules and should be linked into a new perl binary. It writes a corresponding F file that is a plain C file containing all the bootstrap code to make the If the first argument to C is a reference to a scalar it is used as the filename to open for ouput. Any other reference is used as the filehandle to write to. Otherwise output defaults to C. The typical usage is from within a Makefile generated by L. So under normal circumstances you won't have to deal with this module directly. =head1 SEE ALSO L =cut # Local variables: # c-indentation-style: bsd # c-basic-offset: 4 # indent-tabs-mode: nil # End: # # ex: set ts=8 sts=4 sw=4 et: