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sub which
{
my $file = $_[0];
my @paths = split(/:/, $ENV{PATH});
foreach my $path (@paths)
{
my $file_path = File::Spec->catfile($path, $file);
return $file_path if(guess_check_for_file($file_path));
}
return '';
}
sub guess_cpu_from_this
{
my $cpuinfo = lc $_[0];
my $cpu = '';
$cpu = 'athlon' if($cpuinfo =~ /athlon/);
$cpu = 'pentium4' if($cpuinfo =~ /pentium 4/);
$cpu = 'pentium4' if($cpuinfo =~ /pentium\(r\) 4/);
$cpu = 'pentium3' if($cpuinfo =~ /pentium iii/);
$cpu = 'pentium2' if($cpuinfo =~ /pentium ii/);
$cpu = 'pentium3' if($cpuinfo =~ /pentium 3/);
$cpu = 'pentium2' if($cpuinfo =~ /pentium 2/);
# The 32-bit SPARC stuff is impossible to match to arch type easily, and
# anyway the uname stuff will pick up that it's a SPARC so it doesn't
# matter. If it's an Ultra, assume a 32-bit userspace, no 64-bit code
# possible; that's the most common setup right now anyway
$cpu = 'sparc32-v9' if($cpuinfo =~ /ultrasparc/);
# 64-bit PowerPC
$cpu = 'rs64a' if($cpuinfo =~ /rs64-/);
$cpu = 'power3' if($cpuinfo =~ /power3/);
$cpu = 'power4' if($cpuinfo =~ /power4/);
$cpu = 'power5' if($cpuinfo =~ /power5/);
$cpu = 'ppc970' if($cpuinfo =~ /ppc970/);
# Ooh, an Alpha. Try to figure out what kind
if($cpuinfo =~ /alpha/)
{
$cpu = 'alpha-ev4' if($cpuinfo =~ /ev4/);
$cpu = 'alpha-ev5' if($cpuinfo =~ /ev5/);
$cpu = 'alpha-ev56' if($cpuinfo =~ /ev56/);
$cpu = 'alpha-pca56' if($cpuinfo =~ /pca56/);
$cpu = 'alpha-ev6' if($cpuinfo =~ /ev6/);
$cpu = 'alpha-ev67' if($cpuinfo =~ /ev67/);
$cpu = 'alpha-ev68' if($cpuinfo =~ /ev68/);
$cpu = 'alpha-ev7' if($cpuinfo =~ /ev7/);
}
return $cpu;
}
# Do some WAGing and see if we can figure out what system we are. Think about
# this as a really moronic config.guess
sub guess_triple
{
# /bin/sh, good bet we're on something Unix-y (at least it'll have uname)
if(-f '/bin/sh')
{
my $os = lc `uname -s 2>/dev/null`; chomp $os;
# Let the crappy hacks commence!
# Cygwin's uname -s is cygwin_<windows version>
$os = 'cygwin' if($os =~ /^cygwin/);
if(!defined $OS_TYPE{$os} && !defined $OS_ALIAS{$os})
{
print "Unknown uname -s output: $os, falling back to 'generic'\n";
$os = 'generic';
}
$os = $OS_ALIAS{$os} if(defined($OS_ALIAS{$os}));
my $cpu = '';
# If we have /proc/cpuinfo, try to get nice specific information about
# what kind of CPU we're running on.
if(guess_check_for_file('/proc/cpuinfo'))
{
open CPUINFO, '/proc/cpuinfo' or die
"Hey, guess_check_for_file said /proc/cpuinfo was readable!\n";
my $cpuinfo = join('', <CPUINFO>);
close CPUINFO;
$cpu = guess_cpu_from_this($cpuinfo);
}
# `umame -p` is sometimes something stupid like unknown, but in some
# cases it can be more specific (useful) than `uname -m`
if($cpu eq '') # no guess so far
{
my $uname_p = `uname -p 2>/dev/null`;
chomp $uname_p;
$cpu = guess_cpu_from_this($uname_p);
# If guess_cpu_from_this didn't figure it out, try it plain
if($cpu eq '') { $cpu = lc $uname_p; }
if(!defined $ARCH{$cpu} && !defined $SUBMODEL_ALIAS{$cpu} &&
!defined $ARCH_ALIAS{$cpu})
{
# Nope, couldn't figure out uname -p
$cpu = lc `uname -m 2>/dev/null`;
chomp $cpu;
if(!defined $ARCH{$cpu} && !defined $SUBMODEL_ALIAS{$cpu} &&
!defined $ARCH_ALIAS{$cpu})
{
$cpu = 'generic';
}
}
}
my @CCS = ('gcc', 'icc', 'compaq', 'kai'); # Skips several, oh well...
# First try the CC enviornmental variable, if it's set
if(defined($ENV{CC}))
{
my @new_CCS = ($ENV{CC});
foreach my $cc (@CCS) { push @new_CCS, $cc; }
@CCS = @new_CCS;
}
my $cc = '';
foreach (@CCS)
{
my $bin_name = $CC_BINARY_NAME{$_};
$cc = $_ if(which($bin_name) ne '');
last if($cc ne '');
}
if($cc eq '') {
warn "Can't find a usable C++ compiler, is your PATH right?\n";
warn "You might need to run with explicit compiler/system flags;\n";
warn " run '$0 --help' for more information\n";
exit 1;
}
return "$cc-$os-$cpu";
}
elsif($^O eq 'MSWin32' or $^O eq 'dos')
{
my $os = 'windows'; # obviously
# Suggestions on this? The Win32 'shell' env is not so hot. We could
# try using cpuinfo, except that will crash hard on NT/Alpha (like what
# we're doing now won't!). In my defense of choosing i686:
# a) There are maybe a few hundred Alpha/MIPS boxes running NT4 today
# b) Anyone running Windows on < Pentium Pro deserves to lose.
my $cpu = 'i686';
# No /bin/sh, so not cygwin. Assume VC++; again, this could be much
# smarter
my $cc = 'msvc';
return "$cc-$os-$cpu";
}
else
{
print "Sorry, you don't seem to be on Unix or Windows;\n" .
" autoconfig failed (try running me with --help)\n";
exit 1;
}
}
sub guess_check_for_file
{
my $file = $_[0];
return 1 if(-f $file and -r $file);
return 0;
}
sub guess_mods
{
my ($cc, $os, $arch, $submodel) = @_;
my @usable_modules;
foreach my $mod (sort keys %MODULES)
{
next if($mod eq 'minimal'); # Never enabled by default
my %modinfo = %{ $MODULES{$mod} };
# If it uses external libs, the user has to request it specifically
next if($modinfo{'external_libs'});
my @cc_list = ();
if($modinfo{'cc'}) { @cc_list = keys %{ $modinfo{'cc'} }; }
my @os_list = ();
if($modinfo{'os'}) { @os_list = keys %{ $modinfo{'os'} }; }
my @arch_list = ();
if($modinfo{'arch'}) { @arch_list = keys %{ $modinfo{'arch'} }; }
next if(scalar @cc_list > 0 && !in_array(\@cc_list, $cc));
next if(scalar @os_list > 0 && !in_array(\@os_list, $os));
next if(scalar @arch_list > 0 &&
!in_array(\@arch_list, $arch) &&
!in_array(\@arch_list, $submodel));
push @usable_modules, $mod;
}
return @usable_modules;
}
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