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bugfix: the feature test for SSE 4.2 support did not really check if the local CPU indeed has it.

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Signed-off-by: Yichun Zhang (agentzh) <agentzh@gmail.com>
This commit is contained in:
Jukka Raimovaara 2017-04-29 21:47:20 +03:00 committed by Yichun Zhang (agentzh)
parent 79dc3c56aa
commit eb8fc7771d
1 changed files with 21 additions and 4 deletions
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25
util/configure vendored
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@ -632,18 +632,35 @@ _END_
SUFFIX => '.c', TMPDIR => 1, SUFFIX => '.c', TMPDIR => 1,
UNLINK => 1); UNLINK => 1);
print $out "int main(void) { return 0; }"; print $out "
int main(void) {
#ifndef __SSE4_2__
# error SSE 4.2 not found
#endif
return 0;
}
";
close $out; close $out;
my $ofile = tmpnam(); my $ofile = tmpnam();
my $comp = ($cc || 'cc'); my $comp = ($cc || 'cc');
my $found;
if (system("$comp -o $ofile -msse4.2 -c $cfile") == 0 && -s $ofile) { if (system("$comp -o $ofile -msse4.2 -c $cfile") == 0 && -s $ofile) {
print "INFO: found -msse4.2 in $comp.\n";
$luajit_xcflags .= " -msse4.2";
unlink $ofile; unlink $ofile;
} else { if (system("$comp -o $ofile -march=native -c $cfile") == 0 && -s $ofile) {
print "INFO: found -msse4.2 in $comp.\n";
$found = 1;
$luajit_xcflags .= " -msse4.2";
}
}
if (-f $ofile) {
unlink $ofile;
}
if (!$found) {
print "WARNING: -msse4.2 not supported in $comp.\n"; print "WARNING: -msse4.2 not supported in $comp.\n";
} }
} }