[p5sagit/p5-mst-13.2.git] / ext / Time / HiRes / Makefile.PL

#!/usr/bin/perl
#
# In general we trust %Config, but for nanosleep() this trust
# may be misplaced (it may be linkable but not really functional).
# Use $ENV{FORCE_NANOSLEEP_SCAN} to force rescanning whether there
# really is hope.

require 5.002;

use Config;
use ExtUtils::MakeMaker;
use strict;

my $VERBOSE = $ENV{VERBOSE};
my $DEFINE;
my $LIBS = [];
my $XSOPT = '';
my $SYSCALL_H;

use vars qw($self); # Used in 'sourcing' the hints.

my $ld_exeext = ($^O eq 'cygwin' ||
                 $^O eq 'os2' && $Config{ldflags} =~ /-Zexe\b/) ? '.exe' : '';

unless($ENV{PERL_CORE}) {
    $ENV{PERL_CORE} = 1 if grep { $_ eq 'PERL_CORE=1' } @ARGV;
}

# Perls 5.002 and 5.003 did not have File::Spec, fake what we need.

sub my_dirsep {
    $^O eq 'VMS' ? '.' :
	$^O =~ /mswin32|netware|djgpp/i ? '\\' :
	    $^O eq 'MacOS' ? ':'
		: '/';
}

sub my_catdir {
    shift;
    my $catdir = join(my_dirsep, @_);
    $^O eq 'VMS' ? "[$catdir]" : $catdir;
}

sub my_catfile {
    shift;
    return join(my_dirsep, @_) unless $^O eq 'VMS';
    my $file = pop;
    return my_catdir (undef, @_) . $file;
}

sub my_updir {
    shift;
    $^O eq 'VMS' ? "-" : "..";
}

BEGIN {
    eval { require File::Spec };
    if ($@) {
	*File::Spec::catdir  = \&my_catdir;
	*File::Spec::updir   = \&my_updir;
	*File::Spec::catfile = \&my_catfile;
    }
}

# Avoid 'used only once' warnings.
my $nop1 = *File::Spec::catdir;
my $nop2 = *File::Spec::updir;
my $nop3 = *File::Spec::catfile;

# if you have 5.004_03 (and some slightly older versions?), xsubpp
# tries to generate line numbers in the C code generated from the .xs.
# unfortunately, it is a little buggy around #ifdef'd code.
# my choice is leave it in and have people with old perls complain
# about the "Usage" bug, or leave it out and be unable to compile myself
# without changing it, and then I'd always forget to change it before a
# release. Sorry, Edward :)

sub try_compile_and_link {
    my ($c, %args) = @_;

    my ($ok) = 0;
    my ($tmp) = "tmp$$";
    local(*TMPC);

    my $obj_ext = $Config{obj_ext} || ".o";
    unlink("$tmp.c", "$tmp$obj_ext");

    if (open(TMPC, ">$tmp.c")) {
	print TMPC $c;
	close(TMPC);

	my $cccmd = $args{cccmd};

	my $errornull;

	my $COREincdir;

	if ($ENV{PERL_CORE}) {
	    my $updir = File::Spec->updir;
	    $COREincdir = File::Spec->catdir(($updir) x 3);
	} else {
	    $COREincdir = File::Spec->catdir($Config{'archlibexp'}, 'CORE');
	}

	my $ccflags = $Config{'ccflags'} . ' ' . "-I$COREincdir";

	if ($^O eq 'VMS') {
	    if ($ENV{PERL_CORE}) {
		# Fragile if the extensions change hierarchy within
		# the Perl core but this should do for now.
                $cccmd = "$Config{'cc'} /include=([---]) $tmp.c";
	    } else {
		my $perl_core = $Config{'installarchlib'};
		$perl_core =~ s/\]$/.CORE]/;
                $cccmd = "$Config{'cc'} /include=(perl_root:[000000],$perl_core) $tmp.c";
	    }
        }

        if ($args{silent} || !$VERBOSE) {
	    $errornull = "2>/dev/null" unless defined $errornull;
	} else {
	    $errornull = '';
	}

        $cccmd = "$Config{'cc'} -o $tmp $ccflags $tmp.c @$LIBS $errornull"
	    unless defined $cccmd;

       if ($^O eq 'VMS') {
	    open( CMDFILE, ">$tmp.com" );
	    print CMDFILE "\$ SET MESSAGE/NOFACILITY/NOSEVERITY/NOIDENT/NOTEXT\n";
	    print CMDFILE "\$ $cccmd\n";
	    print CMDFILE "\$ IF \$SEVERITY .NE. 1 THEN EXIT 44\n"; # escalate
	    close CMDFILE;
	    system("\@ $tmp.com");
	    $ok = $?==0;
	    for ("$tmp.c", "$tmp$obj_ext", "$tmp.com", "$tmp$Config{exe_ext}") {
		1 while unlink $_;
	    }
        }
        else
        {
	    my $tmp_exe = "$tmp$ld_exeext";
	    printf "cccmd = $cccmd\n" if $VERBOSE;
	    my $res = system($cccmd);
	    $ok = defined($res) && $res == 0 && -s $tmp_exe && -x _;

	    if ( $ok && exists $args{run} && $args{run}) {
		my $tmp_exe =
		    File::Spec->catfile(File::Spec->curdir, $tmp_exe);
		printf "Running $tmp_exe..." if $VERBOSE;
		if (system($tmp_exe) == 0) {
		    $ok = 1;
		} else {
		    $ok = 0;
		    my $errno = $? >> 8;
		    local $! = $errno;
		    printf <<EOF;

*** The test run of '$tmp_exe' failed: status $?
*** (the status means: errno = $errno or '$!')
*** DO NOT PANIC: this just means that *some* functionality will be missing.
EOF
		}
	    }
	    unlink("$tmp.c", $tmp_exe);
        }
    }

    return $ok;
}

sub has_gettimeofday {
    # confusing but true (if condition true ==> -DHAS_GETTIMEOFDAY already)
    return 0 if $Config{d_gettimeod};
    return 1 if try_compile_and_link(<<EOM);
#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"
#ifdef I_SYS_TYPES
#   include <sys/types.h>
#endif

#ifdef I_SYS_TIME
#   include <sys/time.h>
#endif

#ifdef I_SYS_SELECT
#   include <sys/select.h>	/* struct timeval might be hidden in here */
#endif
static int foo()
{
    struct timeval tv;
    gettimeofday(&tv, 0);
}
int main _((int argc, char** argv, char** env))
{
    foo();
}
EOM
    return 0;
}

sub has_x {
    my ($x, %args) = @_;

    return 1 if
    try_compile_and_link(<<EOM, %args);
#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"

#ifdef I_UNISTD
#   include <unistd.h>
#endif

#ifdef I_SYS_TYPES
#   include <sys/types.h>
#endif

#ifdef I_SYS_TIME
#   include <sys/time.h>
#endif

int main _((int argc, char** argv, char** env))
{
	$x;
}
EOM
    return 0;
}

sub has_nanosleep {
    print "testing... ";
    return 1 if
    try_compile_and_link(<<EOM, run => 1);
#include <time.h>
#include <sys/time.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>

/* int nanosleep(const struct timespec *rqtp, struct timespec *rmtp); */

int main() {
    struct timespec ts1, ts2;
    int ret;
    ts1.tv_sec  = 0;
    ts1.tv_nsec = 750000000;
    ts2.tv_sec  = 0;
    ts2.tv_nsec = 0;
    errno = 0;
    ret = nanosleep(&ts1, &ts2); /* E.g. in AIX nanosleep() fails and sets errno to ENOSYS. */
    ret == 0 ? exit(0) : exit(errno ? errno : -1);
}
EOM
}

sub has_include {
    my ($inc) = @_;
    return 1 if
    try_compile_and_link(<<EOM);
#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"

#include <$inc>
int main _((int argc, char** argv, char** env))
{
	return 0;
}
EOM
    return 0;
}

sub has_clock_x_syscall {
    my $x = shift;
    return 0 unless defined $SYSCALL_H;
    return 1 if
    try_compile_and_link(<<EOM, run => 1);
#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"
#include <$SYSCALL_H>
int main _((int argc, char** argv, char** env))
{
    struct timespec ts;
    /* Many Linuxes get ENOSYS even though the syscall exists. */
    /* All implementations are supposed to support CLOCK_REALTIME. */
    int ret = syscall(SYS_clock_$x, CLOCK_REALTIME, &ts);
    ret == 0 ? exit(0) : exit(errno ? errno : -1);
}
EOM
}

sub has_clock_x {
    my $x = shift;
    return 1 if
    try_compile_and_link(<<EOM, run => 1);
#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"
int main _((int argc, char** argv, char** env))
{
    struct timespec ts;
    int ret = clock_$x(CLOCK_REALTIME, &ts); /* Many Linuxes get ENOSYS. */
    /* All implementations are supposed to support CLOCK_REALTIME. */
    ret == 0 ? exit(0) : exit(errno ? errno : -1);
}
EOM
}

sub init {
    my $hints = File::Spec->catfile("hints", "$^O.pl");
    if (-f $hints) {
	print "Using hints $hints...\n";
	local $self;
	do $hints;
	if (exists $self->{LIBS}) {
	    $LIBS = $self->{LIBS};
	    print "Extra libraries: @$LIBS...\n";
	}
    }

    $DEFINE = '';

    if ($Config{d_syscall}) {
	print "Have syscall(), looking for syscall.h... ";
	if (has_include('syscall.h')) {
	    $SYSCALL_H = 'syscall.h';
	} elsif (has_include('sys/syscall.h')) {
	    $SYSCALL_H = 'sys/syscall.h';
	}
    }

    if (defined $SYSCALL_H) {
	print "found <$SYSCALL_H>.\n";
    } else {
	print "NOT found.\n";
    }

    print "Looking for gettimeofday()... ";
    my $has_gettimeofday;
    if (exists $Config{d_gettimeod}) {
	$has_gettimeofday++ if $Config{d_gettimeod};
    } elsif (has_gettimeofday()) {
	$DEFINE .= ' -DHAS_GETTIMEOFDAY';
	$has_gettimeofday++;
    }

    if ($has_gettimeofday) {
	print "found.\n";
    } else {
	die <<EOD
Your operating system does not seem to have the gettimeofday() function.
(or, at least, I cannot find it)

There is no way Time::HiRes is going to work.

I am awfully sorry but I cannot go further.

Aborting configuration.

EOD
    }

    print "Looking for setitimer()... ";
    my $has_setitimer;
    if (exists $Config{d_setitimer}) {
        $has_setitimer++ if $Config{d_setitimer};
    } elsif (has_x("setitimer(ITIMER_REAL, 0, 0)")) {
        $has_setitimer++;
        $DEFINE .= ' -DHAS_SETITIMER';
    }

    if ($has_setitimer) {
        print "found.\n";
    } else {
	print "NOT found.\n";
    }

    print "Looking for getitimer()... ";
    my $has_getitimer;
    if (exists $Config{'d_getitimer'}) {
        $has_getitimer++ if $Config{'d_getitimer'};
    } elsif (has_x("getitimer(ITIMER_REAL, 0)")) {
        $has_getitimer++;
        $DEFINE .= ' -DHAS_GETITIMER';
    }

    if ($has_getitimer) {
        print "found.\n";
    } else {
	print "NOT found.\n";
    }

    if ($has_setitimer && $has_getitimer) {
	print "You have interval timers (both setitimer and getitimer).\n";
    } else {
	print "You do not have interval timers.\n";
    }

    print "Looking for ualarm()... ";
    my $has_ualarm;
    if (exists $Config{d_ualarm}) {
        $has_ualarm++ if $Config{d_ualarm};
    } elsif (has_x ("ualarm (0, 0)")) {
        $has_ualarm++;
	$DEFINE .= ' -DHAS_UALARM';
    }

    if ($has_ualarm) {
        print "found.\n";
    } else {
	print "NOT found.\n";
	if ($has_setitimer) {
	    print "But you have setitimer().\n";
	    print "We can make a Time::HiRes::ualarm().\n";
	}
    }

    print "Looking for usleep()... ";
    my $has_usleep;
    if (exists $Config{d_usleep}) {
	$has_usleep++ if $Config{d_usleep};
    } elsif (has_x ("usleep (0)")) {
	$has_usleep++;
	$DEFINE .= ' -DHAS_USLEEP';
    }

    if ($has_usleep) {
	print "found.\n";
    } else {
	print "NOT found.\n";
        print "Let's see if you have select()... ";
        if ($Config{'d_select'}) {
	    print "found.\n";
	    print "We can make a Time::HiRes::usleep().\n";
	} else {
	    print "NOT found.\n";
	    print "You won't have a Time::HiRes::usleep().\n";
	}
    }

    print "Looking for nanosleep()... ";
    my $has_nanosleep;
    if ($ENV{FORCE_NANOSLEEP_SCAN}) {
	print "forced scan... ";
	if (has_nanosleep()) {
	    $has_nanosleep++;
	    $DEFINE .= ' -DTIME_HIRES_NANOSLEEP';
	}
    }
    elsif (exists $Config{d_nanosleep}) {
	print "believing \$Config{d_nanosleep}... ";
	if ($Config{d_nanosleep}) {
	    $has_nanosleep++;
	    $DEFINE .= ' -DTIME_HIRES_NANOSLEEP';
	}
    } elsif ($^O =~ /^(mpeix)$/) {
	# MPE/iX falsely finds nanosleep from its libc equivalent.
	print "skipping because in $^O... ";
    } else {
	if (has_nanosleep()) {
	    $has_nanosleep++;
	    $DEFINE .= ' -DTIME_HIRES_NANOSLEEP';
	}
    }

    if ($has_nanosleep) {
	print "found.\n";
        print "You can mix subsecond sleeps with signals, if you want to.\n";
        print "(It's still not portable, though.)\n";
    } else {
	print "NOT found.\n";
	my $nt = ($^O eq 'os2' ? '' : 'not');
        print "You can$nt mix subsecond sleeps with signals.\n";
        print "(It would not be portable anyway.)\n";
    }

    print "Looking for clock_gettime()... ";
    my $has_clock_gettime;
    if (exists $Config{d_clock_gettime}) {
        $has_clock_gettime++ if $Config{d_clock_gettime}; # Unlikely...
    } elsif (has_clock_x('gettime')) {
        $has_clock_gettime++;
	$DEFINE .= ' -DTIME_HIRES_CLOCK_GETTIME';
    } elsif (defined $SYSCALL_H && has_clock_x_syscall('gettime')) {
        $has_clock_gettime++;
	$DEFINE .= ' -DTIME_HIRES_CLOCK_GETTIME -DTIME_HIRES_CLOCK_GETTIME_SYSCALL';
    }

    if ($has_clock_gettime) {
        if ($DEFINE =~ /-DTIME_HIRES_CLOCK_GETTIME_SYSCALL/) {
	    print "found (via syscall).\n";
	} else {
	    print "found.\n";
	}
    } else {
	print "NOT found.\n";
    }

    print "Looking for clock_getres()... ";
    my $has_clock_getres;
    if (exists $Config{d_clock_getres}) {
        $has_clock_getres++ if $Config{d_clock_getres}; # Unlikely...
    } elsif (has_clock_x('getres')) {
        $has_clock_getres++;
	$DEFINE .= ' -DTIME_HIRES_CLOCK_GETRES';
    } elsif (defined $SYSCALL_H && has_clock_x_syscall('getres')) {
        $has_clock_getres++;
	$DEFINE .= ' -DTIME_HIRES_CLOCK_GETRES -DTIME_HIRES_CLOCK_GETRES_SYSCALL';
    }

    if ($has_clock_getres) {
        if ($DEFINE =~ /-DTIME_HIRES_CLOCK_GETRES_SYSCALL/) {
	    print "found (via syscall).\n";
	} else {
	    print "found.\n";
	}
    } else {
	print "NOT found.\n";
    }

    my $has_w32api_windows_h;
    if ($^O eq 'cygwin') {
        print "Looking for <w32api/windows.h>... ";
        if (has_include('w32api/windows.h')) {
	    $has_w32api_windows_h++;
	    $DEFINE .= ' -DHAS_W32API_WINDOWS_H';
	}
        if ($has_w32api_windows_h) {
	    print "found.\n";
	} else {
	    print "NOT found.\n";
	}
    }

    if ($DEFINE) {
        $DEFINE =~ s/^\s+//;
        if (open(XDEFINE, ">xdefine")) {
	    print XDEFINE $DEFINE, "\n";
	    close(XDEFINE);
        }
    }
}

sub doMakefile {
    my @makefileopts = ();

    if ($] >= 5.005) {
	push (@makefileopts,
	    'AUTHOR'    => 'Jarkko Hietaniemi <jhi@iki.fi>',
	    'ABSTRACT_FROM' => 'HiRes.pm',
	);
	$DEFINE .= " -DATLEASTFIVEOHOHFIVE";
    }

    push (@makefileopts,
	'NAME'	=> 'Time::HiRes',
	'VERSION_FROM' => 'HiRes.pm', # finds $VERSION
	'LIBS'	=> $LIBS,   # e.g., '-lm'
	'DEFINE'	=> $DEFINE,     # e.g., '-DHAS_SOMETHING'
	'XSOPT'	=> $XSOPT,
	  # Do not even think about 'INC' => '-I/usr/ucbinclude',
	  # Solaris will avenge.
	'INC'	=> '',     # e.g., '-I/usr/include/other'
	'INSTALLDIRS' => ($] >= 5.008 ? 'perl' : 'site'),
	'dist'      => {
	    'CI'       => 'ci -l',
	    'COMPRESS' => 'gzip -9f',
	    'SUFFIX'   => 'gz',
	},
        clean => { FILES => "xdefine" },
        realclean => { FILES=> 'const-c.inc const-xs.inc' },
    );

    if ($ENV{PERL_CORE}) {
	push @makefileopts, MAN3PODS => {};
    }

    WriteMakefile(@makefileopts);
}

sub doConstants {
    if (eval {require ExtUtils::Constant; 1}) {
	my @names = (qw(CLOCK_HIGHRES CLOCK_MONOTONIC
			CLOCK_PROCESS_CPUTIME_ID
			CLOCK_REALTIME
			CLOCK_THREAD_CPUTIME_ID
			CLOCK_TIMEOFDAY
			ITIMER_REAL ITIMER_VIRTUAL ITIMER_PROF
			ITIMER_REALPROF));
	foreach (qw (d_usleep d_ualarm d_gettimeofday d_getitimer d_setitimer
		     d_nanosleep d_clock_gettime d_clock_getres)) {
	    my $macro = $_;
	    if ($macro =~ /^(d_nanosleep|d_clock_gettime|d_clock_getres)$/) {
		$macro =~ s/^d_(.+)/TIME_HIRES_\U$1/;
	    } else {
		$macro =~ s/^d_(.+)/HAS_\U$1/;
	    }
	    push @names, {name => $_, macro => $macro, value => 1,
			  default => ["IV", "0"]};
	}
	ExtUtils::Constant::WriteConstants(
					   NAME => 'Time::HiRes',
					   NAMES => \@names,
					  );
    } else {
        my $file;
	foreach $file ('const-c.inc', 'const-xs.inc') {
	    my $fallback = File::Spec->catfile('fallback', $file);
	    local $/;
	    open IN, "<$fallback" or die "Can't open $fallback: $!";
	    open OUT, ">$file" or die "Can't open $file: $!";
	    print OUT <IN> or die $!;
	    close OUT or die "Can't close $file: $!";
	    close IN or die "Can't close $fallback: $!";
	}
    }
}

sub main {
    print "Configuring Time::HiRes...\n";
    if ($] == 5.007002) {
	die "Cannot Configure Time::HiRes for Perl $], aborting.\n";
    }

    if ($^O =~ /Win32/i) {
      $DEFINE = '-DSELECT_IS_BROKEN';
      $LIBS = [];
    } else {
      init();
    }
    doMakefile;
    doConstants;
    my $make = $Config{'make'} || "make";
    unless (exists $ENV{PERL_CORE} && $ENV{PERL_CORE}) {
	print  <<EOM;
Now you may issue '$make'.  Do not forget also '$make test'.
EOM
       if ((exists $ENV{LC_ALL}   && $ENV{LC_ALL}   =~ /utf-?8/i) ||
           (exists $ENV{LC_CTYPE} && $ENV{LC_CTYPE} =~ /utf-?8/i) ||
           (exists $ENV{LANG}     && $ENV{LANG}     =~ /utf-?8/i)) {
            print  <<EOM;
NOTE: if you get an error like this (the Makefile line number may vary):
Makefile:91: *** missing separator
then set the environment variable LC_ALL to "C" and retry
from scratch (re-run perl "Makefile.PL").
EOM
        }
    }
}

&main;

# EOF
Commit	Line	Data
56c1b3bd	1	#!/usr/bin/perl
	2	#
	3	# In general we trust %Config, but for nanosleep() this trust
3d0346a5	4	# may be misplaced (it may be linkable but not really functional).
56c1b3bd	5	# Use $ENV{FORCE_NANOSLEEP_SCAN} to force rescanning whether there
	6	# really is hope.
	7
3f2ee006	8	require 5.002;
	9
	10	use Config;
dcf686c9	11	use ExtUtils::MakeMaker;
98b50af3	12	use strict;
3f2ee006	13
3f2ee006	14	my $VERBOSE = $ENV{VERBOSE};
98b50af3	15	my $DEFINE;
046e3f33	16	my $LIBS = [];
56c1b3bd	17	my $XSOPT = '';
ced84e60	18	my $SYSCALL_H;
98b50af3	19
046e3f33	20	use vars qw($self); # Used in 'sourcing' the hints.
046e3f33	21
4ed0e2d4	22	my $ld_exeext = ($^O eq 'cygwin' \|\|
4ed0e2d4	23	$^O eq 'os2' && $Config{ldflags} =~ /-Zexe\b/) ? '.exe' : '';
622913ab	24
12724655	25	unless($ENV{PERL_CORE}) {
12724655	26	$ENV{PERL_CORE} = 1 if grep { $_ eq 'PERL_CORE=1' } @ARGV;
98b50af3	27	}
	28
	29	# Perls 5.002 and 5.003 did not have File::Spec, fake what we need.
3f2ee006	30
	31	sub my_dirsep {
	32	$^O eq 'VMS' ? '.' :
	33	$^O =~ /mswin32\|netware\|djgpp/i ? '\\' :
	34	$^O eq 'MacOS' ? ':'
	35	: '/';
	36	}
	37
	38	sub my_catdir {
	39	shift;
	40	my $catdir = join(my_dirsep, @_);
98b50af3	41	$^O eq 'VMS' ? "[$catdir]" : $catdir;
	42	}
	43
	44	sub my_catfile {
	45	shift;
	46	return join(my_dirsep, @_) unless $^O eq 'VMS';
	47	my $file = pop;
	48	return my_catdir (undef, @_) . $file;
3f2ee006	49	}
	50
	51	sub my_updir {
	52	shift;
	53	$^O eq 'VMS' ? "-" : "..";
	54	}
	55
	56	BEGIN {
	57	eval { require File::Spec };
	58	if ($@) {
25ca0970	59	*File::Spec::catdir = \&my_catdir;
25ca0970	60	*File::Spec::updir = \&my_updir;
98b50af3	61	*File::Spec::catfile = \&my_catfile;
3f2ee006	62	}
	63	}
	64
98b50af3	65	# Avoid 'used only once' warnings.
	66	my $nop1 = *File::Spec::catdir;
	67	my $nop2 = *File::Spec::updir;
	68	my $nop3 = *File::Spec::catfile;
	69
3f2ee006	70	# if you have 5.004_03 (and some slightly older versions?), xsubpp
	71	# tries to generate line numbers in the C code generated from the .xs.
	72	# unfortunately, it is a little buggy around #ifdef'd code.
5d899d7e	73	# my choice is leave it in and have people with old perls complain
3f2ee006	74	# about the "Usage" bug, or leave it out and be unable to compile myself
5d899d7e	75	# without changing it, and then I'd always forget to change it before a
3f2ee006	76	# release. Sorry, Edward :)
3f2ee006	77
3f2ee006	78	sub try_compile_and_link {
	79	my ($c, %args) = @_;
	80
	81	my ($ok) = 0;
2359510d	82	my ($tmp) = "tmp$$";
3f2ee006	83	local(*TMPC);
	84
	85	my $obj_ext = $Config{obj_ext} \|\| ".o";
	86	unlink("$tmp.c", "$tmp$obj_ext");
	87
	88	if (open(TMPC, ">$tmp.c")) {
	89	print TMPC $c;
	90	close(TMPC);
	91
98b50af3	92	my $cccmd = $args{cccmd};
3f2ee006	93
	94	my $errornull;
	95
	96	my $COREincdir;
98b50af3	97
3f2ee006	98	if ($ENV{PERL_CORE}) {
	99	my $updir = File::Spec->updir;
	100	$COREincdir = File::Spec->catdir(($updir) x 3);
	101	} else {
	102	$COREincdir = File::Spec->catdir($Config{'archlibexp'}, 'CORE');
	103	}
98b50af3	104
3f2ee006	105	my $ccflags = $Config{'ccflags'} . ' ' . "-I$COREincdir";
98b50af3	106
3f2ee006	107	if ($^O eq 'VMS') {
3f2ee006	108	if ($ENV{PERL_CORE}) {
3d036c2b	109	# Fragile if the extensions change hierarchy within
6a20eacc	110	# the Perl core but this should do for now.
6a20eacc	111	$cccmd = "$Config{'cc'} /include=([---]) $tmp.c";
3f2ee006	112	} else {
	113	my $perl_core = $Config{'installarchlib'};
	114	$perl_core =~ s/\]$/.CORE]/;
98b50af3	115	$cccmd = "$Config{'cc'} /include=(perl_root:[000000],$perl_core) $tmp.c";
3f2ee006	116	}
	117	}
	118
	119	if ($args{silent} \|\| !$VERBOSE) {
	120	$errornull = "2>/dev/null" unless defined $errornull;
	121	} else {
	122	$errornull = '';
	123	}
	124
98b50af3	125	$cccmd = "$Config{'cc'} -o $tmp $ccflags $tmp.c @$LIBS $errornull"
3f2ee006	126	unless defined $cccmd;
98b50af3	127
c1363767	128	if ($^O eq 'VMS') {
3f2ee006	129	open( CMDFILE, ">$tmp.com" );
	130	print CMDFILE "\$ SET MESSAGE/NOFACILITY/NOSEVERITY/NOIDENT/NOTEXT\n";
	131	print CMDFILE "\$ $cccmd\n";
98b50af3	132	print CMDFILE "\$ IF \$SEVERITY .NE. 1 THEN EXIT 44\n"; # escalate
3f2ee006	133	close CMDFILE;
	134	system("\@ $tmp.com");
	135	$ok = $?==0;
5d899d7e	136	for ("$tmp.c", "$tmp$obj_ext", "$tmp.com", "$tmp$Config{exe_ext}") {
98b50af3	137	1 while unlink $_;
3f2ee006	138	}
	139	}
	140	else
	141	{
622913ab	142	my $tmp_exe = "$tmp$ld_exeext";
3f2ee006	143	printf "cccmd = $cccmd\n" if $VERBOSE;
622913ab	144	my $res = system($cccmd);
ced84e60	145	$ok = defined($res) && $res == 0 && -s $tmp_exe && -x _;
26e22fd9	146
26e22fd9	147	if ( $ok && exists $args{run} && $args{run}) {
06252d99	148	my $tmp_exe =
	149	File::Spec->catfile(File::Spec->curdir, $tmp_exe);
	150	printf "Running $tmp_exe..." if $VERBOSE;
	151	if (system($tmp_exe) == 0) {
56c1b3bd	152	$ok = 1;
26e22fd9	153	} else {
56c1b3bd	154	$ok = 0;
ced84e60	155	my $errno = $? >> 8;
	156	local $! = $errno;
	157	printf <<EOF;
	158
	159	*** The test run of '$tmp_exe' failed: status $?
	160	*** (the status means: errno = $errno or '$!')
	161	*** DO NOT PANIC: this just means that some functionality will be missing.
	162	EOF
26e22fd9	163	}
26e22fd9	164	}
622913ab	165	unlink("$tmp.c", $tmp_exe);
3f2ee006	166	}
3f2ee006	167	}
5d899d7e	168
26e22fd9	169	return $ok;
3f2ee006	170	}
	171
	172	sub has_gettimeofday {
	173	# confusing but true (if condition true ==> -DHAS_GETTIMEOFDAY already)
56c1b3bd	174	return 0 if $Config{d_gettimeod};
98b50af3	175	return 1 if try_compile_and_link(<<EOM);
5d899d7e	176	#include "EXTERN.h"
	177	#include "perl.h"
	178	#include "XSUB.h"
	179	#ifdef I_SYS_TYPES
3f2ee006	180	# include <sys/types.h>
	181	#endif
	182
	183	#ifdef I_SYS_TIME
	184	# include <sys/time.h>
	185	#endif
	186
	187	#ifdef I_SYS_SELECT
	188	# include <sys/select.h> /* struct timeval might be hidden in here */
	189	#endif
	190	static int foo()
	191	{
	192	struct timeval tv;
	193	gettimeofday(&tv, 0);
	194	}
	195	int main _((int argc, char argv, char env))
	196	{
	197	foo();
	198	}
	199	EOM
	200	return 0;
	201	}
	202
	203	sub has_x {
98b50af3	204	my ($x, %args) = @_;
3f2ee006	205
	206	return 1 if
	207	try_compile_and_link(<<EOM, %args);
	208	#include "EXTERN.h"
	209	#include "perl.h"
	210	#include "XSUB.h"
	211
	212	#ifdef I_UNISTD
	213	# include <unistd.h>
	214	#endif
	215
	216	#ifdef I_SYS_TYPES
	217	# include <sys/types.h>
	218	#endif
	219
	220	#ifdef I_SYS_TIME
	221	# include <sys/time.h>
	222	#endif
	223
	224	int main _((int argc, char argv, char env))
	225	{
	226	$x;
	227	}
	228	EOM
	229	return 0;
	230	}
	231
26e22fd9	232	sub has_nanosleep {
3d0346a5	233	print "testing... ";
26e22fd9	234	return 1 if
	235	try_compile_and_link(<<EOM, run => 1);
	236	#include <time.h>
	237	#include <sys/time.h>
	238	#include <stdio.h>
	239	#include <stdlib.h>
	240	#include <errno.h>
	241
	242	/* int nanosleep(const struct timespec rqtp, struct timespec rmtp); */
	243
	244	int main() {
	245	struct timespec ts1, ts2;
56c1b3bd	246	int ret;
26e22fd9	247	ts1.tv_sec = 0;
	248	ts1.tv_nsec = 750000000;
	249	ts2.tv_sec = 0;
	250	ts2.tv_nsec = 0;
56c1b3bd	251	errno = 0;
ced84e60	252	ret = nanosleep(&ts1, &ts2); /* E.g. in AIX nanosleep() fails and sets errno to ENOSYS. */
56c1b3bd	253	ret == 0 ? exit(0) : exit(errno ? errno : -1);
26e22fd9	254	}
	255	EOM
	256	}
	257
4ed0e2d4	258	sub has_include {
	259	my ($inc) = @_;
	260	return 1 if
	261	try_compile_and_link(<<EOM);
	262	#include "EXTERN.h"
	263	#include "perl.h"
	264	#include "XSUB.h"
	265
	266	#include <$inc>
	267	int main _((int argc, char argv, char env))
	268	{
	269	return 0;
	270	}
	271	EOM
	272	return 0;
	273	}
	274
ced84e60	275	sub has_clock_x_syscall {
	276	my $x = shift;
	277	return 0 unless defined $SYSCALL_H;
	278	return 1 if
	279	try_compile_and_link(<<EOM, run => 1);
	280	#include "EXTERN.h"
	281	#include "perl.h"
	282	#include "XSUB.h"
	283	#include <$SYSCALL_H>
	284	int main _((int argc, char argv, char env))
	285	{
	286	struct timespec ts;
	287	/* Many Linuxes get ENOSYS even though the syscall exists. */
	288	/* All implementations are supposed to support CLOCK_REALTIME. */
	289	int ret = syscall(SYS_clock_$x, CLOCK_REALTIME, &ts);
	290	ret == 0 ? exit(0) : exit(errno ? errno : -1);
	291	}
	292	EOM
	293	}
	294
	295	sub has_clock_x {
	296	my $x = shift;
	297	return 1 if
	298	try_compile_and_link(<<EOM, run => 1);
	299	#include "EXTERN.h"
	300	#include "perl.h"
	301	#include "XSUB.h"
	302	int main _((int argc, char argv, char env))
	303	{
	304	struct timespec ts;
	305	int ret = clock_$x(CLOCK_REALTIME, &ts); /* Many Linuxes get ENOSYS. */
	306	/* All implementations are supposed to support CLOCK_REALTIME. */
	307	ret == 0 ? exit(0) : exit(errno ? errno : -1);
	308	}
	309	EOM
	310	}
	311
046e3f33	312	sub init {
	313	my $hints = File::Spec->catfile("hints", "$^O.pl");
	314	if (-f $hints) {
	315	print "Using hints $hints...\n";
	316	local $self;
	317	do $hints;
	318	if (exists $self->{LIBS}) {
	319	$LIBS = $self->{LIBS};
	320	print "Extra libraries: @$LIBS...\n";
3f2ee006	321	}
3f2ee006	322	}
046e3f33	323
046e3f33	324	$DEFINE = '';
3f2ee006	325
ced84e60	326	if ($Config{d_syscall}) {
	327	print "Have syscall(), looking for syscall.h... ";
	328	if (has_include('syscall.h')) {
	329	$SYSCALL_H = 'syscall.h';
	330	} elsif (has_include('sys/syscall.h')) {
	331	$SYSCALL_H = 'sys/syscall.h';
	332	}
	333	}
	334
	335	if (defined $SYSCALL_H) {
	336	print "found <$SYSCALL_H>.\n";
	337	} else {
	338	print "NOT found.\n";
	339	}
	340
98b50af3	341	print "Looking for gettimeofday()... ";
3f2ee006	342	my $has_gettimeofday;
5d899d7e	343	if (exists $Config{d_gettimeod}) {
5d899d7e	344	$has_gettimeofday++ if $Config{d_gettimeod};
3f2ee006	345	} elsif (has_gettimeofday()) {
	346	$DEFINE .= ' -DHAS_GETTIMEOFDAY';
	347	$has_gettimeofday++;
	348	}
	349
	350	if ($has_gettimeofday) {
98b50af3	351	print "found.\n";
3f2ee006	352	} else {
	353	die <<EOD
	354	Your operating system does not seem to have the gettimeofday() function.
	355	(or, at least, I cannot find it)
	356
	357	There is no way Time::HiRes is going to work.
	358
	359	I am awfully sorry but I cannot go further.
	360
	361	Aborting configuration.
	362
	363	EOD
	364	}
	365
98b50af3	366	print "Looking for setitimer()... ";
3f2ee006	367	my $has_setitimer;
5d899d7e	368	if (exists $Config{d_setitimer}) {
5d899d7e	369	$has_setitimer++ if $Config{d_setitimer};
3f2ee006	370	} elsif (has_x("setitimer(ITIMER_REAL, 0, 0)")) {
	371	$has_setitimer++;
	372	$DEFINE .= ' -DHAS_SETITIMER';
	373	}
	374
	375	if ($has_setitimer) {
98b50af3	376	print "found.\n";
3f2ee006	377	} else {
98b50af3	378	print "NOT found.\n";
3f2ee006	379	}
3f2ee006	380
98b50af3	381	print "Looking for getitimer()... ";
3f2ee006	382	my $has_getitimer;
5d899d7e	383	if (exists $Config{'d_getitimer'}) {
5d899d7e	384	$has_getitimer++ if $Config{'d_getitimer'};
3f2ee006	385	} elsif (has_x("getitimer(ITIMER_REAL, 0)")) {
	386	$has_getitimer++;
	387	$DEFINE .= ' -DHAS_GETITIMER';
	388	}
	389
	390	if ($has_getitimer) {
98b50af3	391	print "found.\n";
3f2ee006	392	} else {
98b50af3	393	print "NOT found.\n";
3f2ee006	394	}
	395
	396	if ($has_setitimer && $has_getitimer) {
4ed0e2d4	397	print "You have interval timers (both setitimer and getitimer).\n";
3f2ee006	398	} else {
98b50af3	399	print "You do not have interval timers.\n";
3f2ee006	400	}
3f2ee006	401
98b50af3	402	print "Looking for ualarm()... ";
98b50af3	403	my $has_ualarm;
5d899d7e	404	if (exists $Config{d_ualarm}) {
5d899d7e	405	$has_ualarm++ if $Config{d_ualarm};
3f2ee006	406	} elsif (has_x ("ualarm (0, 0)")) {
	407	$has_ualarm++;
	408	$DEFINE .= ' -DHAS_UALARM';
	409	}
	410
	411	if ($has_ualarm) {
98b50af3	412	print "found.\n";
3f2ee006	413	} else {
98b50af3	414	print "NOT found.\n";
	415	if ($has_setitimer) {
	416	print "But you have setitimer().\n";
	417	print "We can make a Time::HiRes::ualarm().\n";
3f2ee006	418	}
	419	}
	420
98b50af3	421	print "Looking for usleep()... ";
3f2ee006	422	my $has_usleep;
5d899d7e	423	if (exists $Config{d_usleep}) {
5d899d7e	424	$has_usleep++ if $Config{d_usleep};
3f2ee006	425	} elsif (has_x ("usleep (0)")) {
	426	$has_usleep++;
	427	$DEFINE .= ' -DHAS_USLEEP';
	428	}
	429
	430	if ($has_usleep) {
98b50af3	431	print "found.\n";
3f2ee006	432	} else {
98b50af3	433	print "NOT found.\n";
98b50af3	434	print "Let's see if you have select()... ";
56c1b3bd	435	if ($Config{'d_select'}) {
98b50af3	436	print "found.\n";
98b50af3	437	print "We can make a Time::HiRes::usleep().\n";
3f2ee006	438	} else {
98b50af3	439	print "NOT found.\n";
98b50af3	440	print "You won't have a Time::HiRes::usleep().\n";
3f2ee006	441	}
	442	}
	443
98b50af3	444	print "Looking for nanosleep()... ";
3f2ee006	445	my $has_nanosleep;
3d0346a5	446	if ($ENV{FORCE_NANOSLEEP_SCAN}) {
	447	print "forced scan... ";
	448	if (has_nanosleep()) {
	449	$has_nanosleep++;
	450	$DEFINE .= ' -DTIME_HIRES_NANOSLEEP';
	451	}
	452	}
	453	elsif (exists $Config{d_nanosleep}) {
	454	print "believing \$Config{d_nanosleep}... ";
c1363767	455	if ($Config{d_nanosleep}) {
	456	$has_nanosleep++;
	457	$DEFINE .= ' -DTIME_HIRES_NANOSLEEP';
	458	}
3d0346a5	459	} elsif ($^O =~ /^(mpeix)$/) {
	460	# MPE/iX falsely finds nanosleep from its libc equivalent.
	461	print "skipping because in $^O... ";
	462	} else {
	463	if (has_nanosleep()) {
	464	$has_nanosleep++;
	465	$DEFINE .= ' -DTIME_HIRES_NANOSLEEP';
	466	}
3f2ee006	467	}
	468
	469	if ($has_nanosleep) {
98b50af3	470	print "found.\n";
4ed0e2d4	471	print "You can mix subsecond sleeps with signals, if you want to.\n";
4ed0e2d4	472	print "(It's still not portable, though.)\n";
3f2ee006	473	} else {
98b50af3	474	print "NOT found.\n";
622913ab	475	my $nt = ($^O eq 'os2' ? '' : 'not');
622913ab	476	print "You can$nt mix subsecond sleeps with signals.\n";
4ed0e2d4	477	print "(It would not be portable anyway.)\n";
	478	}
	479
ced84e60	480	print "Looking for clock_gettime()... ";
	481	my $has_clock_gettime;
	482	if (exists $Config{d_clock_gettime}) {
	483	$has_clock_gettime++ if $Config{d_clock_gettime}; # Unlikely...
	484	} elsif (has_clock_x('gettime')) {
	485	$has_clock_gettime++;
	486	$DEFINE .= ' -DTIME_HIRES_CLOCK_GETTIME';
	487	} elsif (defined $SYSCALL_H && has_clock_x_syscall('gettime')) {
	488	$has_clock_gettime++;
	489	$DEFINE .= ' -DTIME_HIRES_CLOCK_GETTIME -DTIME_HIRES_CLOCK_GETTIME_SYSCALL';
	490	}
	491
	492	if ($has_clock_gettime) {
	493	if ($DEFINE =~ /-DTIME_HIRES_CLOCK_GETTIME_SYSCALL/) {
	494	print "found (via syscall).\n";
	495	} else {
	496	print "found.\n";
	497	}
	498	} else {
	499	print "NOT found.\n";
	500	}
	501
	502	print "Looking for clock_getres()... ";
	503	my $has_clock_getres;
	504	if (exists $Config{d_clock_getres}) {
	505	$has_clock_getres++ if $Config{d_clock_getres}; # Unlikely...
	506	} elsif (has_clock_x('getres')) {
	507	$has_clock_getres++;
	508	$DEFINE .= ' -DTIME_HIRES_CLOCK_GETRES';
	509	} elsif (defined $SYSCALL_H && has_clock_x_syscall('getres')) {
	510	$has_clock_getres++;
	511	$DEFINE .= ' -DTIME_HIRES_CLOCK_GETRES -DTIME_HIRES_CLOCK_GETRES_SYSCALL';
	512	}
	513
	514	if ($has_clock_getres) {
	515	if ($DEFINE =~ /-DTIME_HIRES_CLOCK_GETRES_SYSCALL/) {
	516	print "found (via syscall).\n";
	517	} else {
	518	print "found.\n";
	519	}
	520	} else {
	521	print "NOT found.\n";
	522	}
	523
4ed0e2d4	524	my $has_w32api_windows_h;
	525	if ($^O eq 'cygwin') {
	526	print "Looking for <w32api/windows.h>... ";
	527	if (has_include('w32api/windows.h')) {
	528	$has_w32api_windows_h++;
	529	$DEFINE .= ' -DHAS_W32API_WINDOWS_H';
	530	}
	531	if ($has_w32api_windows_h) {
	532	print "found.\n";
	533	} else {
	534	print "NOT found.\n";
	535	}
3f2ee006	536	}
	537
	538	if ($DEFINE) {
	539	$DEFINE =~ s/^\s+//;
	540	if (open(XDEFINE, ">xdefine")) {
	541	print XDEFINE $DEFINE, "\n";
	542	close(XDEFINE);
	543	}
	544	}
	545	}
	546
	547	sub doMakefile {
98b50af3	548	my @makefileopts = ();
3f2ee006	549
	550	if ($] >= 5.005) {
	551	push (@makefileopts,
	552	'AUTHOR' => 'Jarkko Hietaniemi <jhi@iki.fi>',
	553	'ABSTRACT_FROM' => 'HiRes.pm',
	554	);
	555	$DEFINE .= " -DATLEASTFIVEOHOHFIVE";
	556	}
	557
	558	push (@makefileopts,
	559	'NAME' => 'Time::HiRes',
	560	'VERSION_FROM' => 'HiRes.pm', # finds $VERSION
5d899d7e	561	'LIBS' => $LIBS, # e.g., '-lm'
5d899d7e	562	'DEFINE' => $DEFINE, # e.g., '-DHAS_SOMETHING'
3f2ee006	563	'XSOPT' => $XSOPT,
ced84e60	564	# Do not even think about 'INC' => '-I/usr/ucbinclude',
ced84e60	565	# Solaris will avenge.
5d899d7e	566	'INC' => '', # e.g., '-I/usr/include/other'
9649b81b	567	'INSTALLDIRS' => ($] >= 5.008 ? 'perl' : 'site'),
3f2ee006	568	'dist' => {
3f2ee006	569	'CI' => 'ci -l',
5d899d7e	570	'COMPRESS' => 'gzip -9f',
3f2ee006	571	'SUFFIX' => 'gz',
	572	},
	573	clean => { FILES => "xdefine" },
1caec985	574	realclean => { FILES=> 'const-c.inc const-xs.inc' },
3f2ee006	575	);
3f2ee006	576
9ac5eb64	577	if ($ENV{PERL_CORE}) {
	578	push @makefileopts, MAN3PODS => {};
	579	}
	580
3f2ee006	581	WriteMakefile(@makefileopts);
	582	}
	583
98b50af3	584	sub doConstants {
98b50af3	585	if (eval {require ExtUtils::Constant; 1}) {
ced84e60	586	my @names = (qw(CLOCK_HIGHRES CLOCK_MONOTONIC
	587	CLOCK_PROCESS_CPUTIME_ID
	588	CLOCK_REALTIME
	589	CLOCK_THREAD_CPUTIME_ID
	590	CLOCK_TIMEOFDAY
	591	ITIMER_REAL ITIMER_VIRTUAL ITIMER_PROF
98b50af3	592	ITIMER_REALPROF));
98b50af3	593	foreach (qw (d_usleep d_ualarm d_gettimeofday d_getitimer d_setitimer
ced84e60	594	d_nanosleep d_clock_gettime d_clock_getres)) {
98b50af3	595	my $macro = $_;
ced84e60	596	if ($macro =~ /^(d_nanosleep\|d_clock_gettime\|d_clock_getres)$/) {
82cbdcc3	597	$macro =~ s/^d_(.+)/TIME_HIRES_\U$1/;
672f6857	598	} else {
82cbdcc3	599	$macro =~ s/^d_(.+)/HAS_\U$1/;
672f6857	600	}
98b50af3	601	push @names, {name => $_, macro => $macro, value => 1,
	602	default => ["IV", "0"]};
	603	}
	604	ExtUtils::Constant::WriteConstants(
	605	NAME => 'Time::HiRes',
	606	NAMES => \@names,
	607	);
	608	} else {
1fbb4de4	609	my $file;
1fbb4de4	610	foreach $file ('const-c.inc', 'const-xs.inc') {
98b50af3	611	my $fallback = File::Spec->catfile('fallback', $file);
	612	local $/;
	613	open IN, "<$fallback" or die "Can't open $fallback: $!";
	614	open OUT, ">$file" or die "Can't open $file: $!";
	615	print OUT <IN> or die $!;
	616	close OUT or die "Can't close $file: $!";
	617	close IN or die "Can't close $fallback: $!";
	618	}
	619	}
	620	}
3f2ee006	621
98b50af3	622	sub main {
98b50af3	623	print "Configuring Time::HiRes...\n";
1fbb4de4	624	if ($] == 5.007002) {
	625	die "Cannot Configure Time::HiRes for Perl $], aborting.\n";
	626	}
3f2ee006	627
	628	if ($^O =~ /Win32/i) {
	629	$DEFINE = '-DSELECT_IS_BROKEN';
046e3f33	630	$LIBS = [];
3f2ee006	631	} else {
046e3f33	632	init();
3f2ee006	633	}
3f2ee006	634	doMakefile;
98b50af3	635	doConstants;
3f2ee006	636	my $make = $Config{'make'} \|\| "make";
1fbb4de4	637	unless (exists $ENV{PERL_CORE} && $ENV{PERL_CORE}) {
3f2ee006	638	print <<EOM;
3f2ee006	639	Now you may issue '$make'. Do not forget also '$make test'.
dfffa540	640	EOM
1fbb4de4	641	if ((exists $ENV{LC_ALL} && $ENV{LC_ALL} =~ /utf-?8/i) \|\|
	642	(exists $ENV{LC_CTYPE} && $ENV{LC_CTYPE} =~ /utf-?8/i) \|\|
	643	(exists $ENV{LANG} && $ENV{LANG} =~ /utf-?8/i)) {
dfffa540	644	print <<EOM;
ced84e60	645	NOTE: if you get an error like this (the Makefile line number may vary):
d7358e6a	646	Makefile:91: *** missing separator
1caec985	647	then set the environment variable LC_ALL to "C" and retry
1caec985	648	from scratch (re-run perl "Makefile.PL").
3f2ee006	649	EOM
dfffa540	650	}
3f2ee006	651	}
	652	}
	653
	654	&main;
dcf686c9	655
3f2ee006	656	# EOF