my $libdir="";
my $openssldir="";
my $exe_ext="";
-my $install_prefix="";
+my $install_prefix= "$ENV{'INSTALL_PREFIX'}";
my $cross_compile_prefix="";
my $no_threads=0;
my $threads=0;
$perl=$ENV{'PERL'} or $perl=&which("perl5") or $perl=&which("perl")
or $perl="perl";
-$cross_compile_prefix=$ENV{'CROSS_COMPILE'};
+$cross_compile_prefix=$ENV{'CROSS_COMPILE'} if $cross_compile_prefix eq "";
chop $openssldir if $openssldir =~ /\/$/;
chop $prefix if $prefix =~ /.\/$/;