I got some reports that some targets have weird dso_schemes.

Therefore, I've added a sanity checker.

Note that it can be combined with almost any other argument (the other
arguments will be completely ignored), with "reconf" as the blatant
exception, since it also has the behavior of ignoring all following
command line arguments.  If --test-sanity and reconf are both used on
the command line, the first one wins.

Configure

@@ -10,7 +10,7 @@ use strict;
 
 # see INSTALL for instructions.
 
-my $usage="Usage: Configure [no-<cipher> ...] [-Dxxx] [-lxxx] [-Lxxx] [-fxxx] [-Kxxx] [no-hw-xxx|no-hw] [[no-]threads] [[no-]shared] [[no-]zlib|zlib-dynamic] [no-asm] [no-dso] [no-krb5] [386] [--prefix=DIR] [--openssldir=OPENSSLDIR] [--with-xxx[=vvv]] os/compiler[:flags]\n";
+my $usage="Usage: Configure [no-<cipher> ...] [-Dxxx] [-lxxx] [-Lxxx] [-fxxx] [-Kxxx] [no-hw-xxx|no-hw] [[no-]threads] [[no-]shared] [[no-]zlib|zlib-dynamic] [no-asm] [no-dso] [no-krb5] [386] [--prefix=DIR] [--openssldir=OPENSSLDIR] [--with-xxx[=vvv]] [-test-sanity] os/compiler[:flags]\n";
 
 # Options:
 #
@@ -35,6 +35,9 @@ my $usage="Usage: Configure [no-<cipher> ...] [-Dxxx] [-lxxx] [-Lxxx] [-fxxx] [-
 # --with-krb5-flavor  Declare what flavor of Kerberos 5 is used.  Currently
 #		supported values are "MIT" and "Heimdal".  A value is required.
 #
+# --test-sanity Make a number of sanity checks on the data in this file.
+#               This is a debugging tool for OpenSSL developers.
+#
 # no-hw-xxx     do not compile support for specific crypto hardware.
 #               Generic OpenSSL-style methods relating to this support
 #               are always compiled but return NULL if the hardware
@@ -534,6 +537,30 @@ my %table=(
 my @WinTargets=qw(VC-NT VC-WIN32 VC-WIN16 VC-W31-16 VC-W31-32 VC-MSDOS BC-32
 	BC-16 Mingw32 OS2-EMX);
 
+my $idx = 0;
+my $idx_cc = $idx++;
+my $idx_cflags = $idx++;
+my $idx_unistd = $idx++;
+my $idx_thread_cflag = $idx++;
+my $idx_sys_id = $idx++;
+my $idx_lflags = $idx++;
+my $idx_bn_ops = $idx++;
+my $idx_bn_obj = $idx++;
+my $idx_des_obj = $idx++;
+my $idx_bf_obj = $idx++;
+my $idx_md5_obj = $idx++;
+my $idx_sha1_obj = $idx++;
+my $idx_cast_obj = $idx++;
+my $idx_rc4_obj = $idx++;
+my $idx_rmd160_obj = $idx++;
+my $idx_rc5_obj = $idx++;
+my $idx_dso_scheme = $idx++;
+my $idx_shared_target = $idx++;
+my $idx_shared_cflag = $idx++;
+my $idx_shared_ldflag = $idx++;
+my $idx_shared_extension = $idx++;
+my $idx_ranlib = $idx++;
+
 my $prefix="";
 my $openssldir="";
 my $exe_ext="";
@@ -619,7 +646,11 @@ PROCESS_ARGS:
 	foreach (@argvcopy)
 		{
 		s /^-no-/no-/; # some people just can't read the instructions
-		if (/^no-asm$/)
+		if (/^--test-sanity$/)
+			{
+			exit(&test_sanity());
+			}
+		elsif (/^no-asm$/)
 		 	{
 			$no_asm=1;
 			$flags .= "-DOPENSSL_NO_ASM ";
@@ -854,12 +885,30 @@ $openssldir=$prefix . "/" . $openssldir if $openssldir !~ /^\//;
 
 print "IsWindows=$IsWindows\n";
 
-(my $cc,my $cflags,my $unistd,my $thread_cflag,my $sys_id,my $lflags,
-my $bn_ops,my $bn_obj,my $des_obj,my $bf_obj,
-my $md5_obj,my $sha1_obj,my $cast_obj,my $rc4_obj,my $rmd160_obj,
-my $rc5_obj,my $dso_scheme,my $shared_target,my $shared_cflag,
-my $shared_ldflag,my $shared_extension,my $ranlib)=
-	split(/\s*:\s*/,$table{$target} . ":" x 30 , -1);
+my @fields = split(/\s*:\s*/,$table{$target} . ":" x 30 , -1);
+my $cc = $fields[$idx_cc];
+my $cflags = $fields[$idx_cflags];
+my $unistd = $fields[$idx_unistd];
+my $thread_cflag = $fields[$idx_thread_cflag];
+my $sys_id = $fields[$idx_sys_id];
+my $lflags = $fields[$idx_lflags];
+my $bn_ops = $fields[$idx_bn_ops];
+my $bn_obj = $fields[$idx_bn_obj];
+my $des_obj = $fields[$idx_des_obj];
+my $bf_obj = $fields[$idx_bf_obj];
+my $md5_obj = $fields[$idx_md5_obj];
+my $sha1_obj = $fields[$idx_sha1_obj];
+my $cast_obj = $fields[$idx_cast_obj];
+my $rc4_obj = $fields[$idx_rc4_obj];
+my $rmd160_obj = $fields[$idx_rmd160_obj];
+my $rc5_obj = $fields[$idx_rc5_obj];
+my $dso_scheme = $fields[$idx_dso_scheme];
+my $shared_target = $fields[$idx_shared_target];
+my $shared_cflag = $fields[$idx_shared_cflag];
+my $shared_ldflag = $fields[$idx_shared_ldflag];
+my $shared_extension = $fields[$idx_shared_extension];
+my $ranlib = $fields[$idx_ranlib];
+
 $cflags="$flags$cflags" if ($flags ne "");
 
 # Kerberos settings.  The flavor must be provided from outside, either through
@@ -1481,3 +1530,26 @@ sub print_table_entry
 \$ranlib       = $ranlib
 EOF
 	}
+
+sub test_sanity
+	{
+	my $errorcnt = 0;
+
+	print STDERR "=" x 70, "\n";
+	print STDERR "=== SANITY TESTING!\n";
+	print STDERR "=== No configuration will be done, all other arguments will be ignored!\n";
+	print STDERR "=" x 70, "\n";
+
+	foreach $target (sort keys %table)
+		{
+		@fields = split(/\s*:\s*/,$table{$target} . ":" x 30 , -1);
+
+		if ($fields[$idx_dso_scheme] !~ /^(dl|dlfcn|win32|vms|)$/)
+			{
+			$errorcnt++;
+			print STDERR "SANITY ERROR: '$target' has the dso_scheme [$idx_dso_scheme] field = ",$fields[$idx_dso_scheme],"\n";
+			print STDERR "              valid values are 'dl', 'dlfcn', 'win32' and 'vms'\n";
+			}
+		}
+	return $errorcnt;
+	}