Build dynamic engines even if configured "no-shared"

Until now, the engines in engines/ were only built as dynamicaly
loadable ones if shared libraries were built.

We not dissociate the two and can build dynamicaly loadable engines
even if we only build static libcrypto and libssl.  This is controlled
with the option (enable|disable|no)-static-engine, defaulting to
no-static-engine.

Note that the engines in crypto/engine/ (dynamic and cryptodev) will
always be built into libcrypto.

Reviewed-by: Rich Salz <rsalz@openssl.org>

Configure

@@ -261,7 +261,7 @@ my @disablables = (
     "dsa",
     "dso",
     "dtls",
-    "dynamic[-_]engine",
+    "dynamic-engine",
     "ec",
     "ec2m",
     "ecdh",
@@ -335,6 +335,7 @@ my %disabled = ( # "what"         => "comment"
 		 "sctp"           => "default",
 		 "shared"         => "default",
 		 "ssl-trace"	  => "default",
+		 "static-engine"  => "default",
 		 "unit-test"	  => "default",
 		 "zlib"           => "default",
 		 "crypto-mdebug"  => "default",
@@ -380,6 +381,9 @@ my @disable_cascades = (
     "tlsext"		=> [ "srp", "heartbeats" ],
 
     "crypto-mdebug"     => [ "crypto-mdebug-backtrace" ],
+
+    # Without DSO, we can't load dynamic engines, so don't build them dynamic
+    "dso"               => [ "dynamic-engine" ],
     );
 
 # Avoid protocol support holes.  Also disable all versions below N, if version
@@ -544,6 +548,14 @@ foreach (@argvcopy)
                                 $disabled{$proto} = "option(tls)";
                                 }
                         }
+                elsif ($1 eq "static-engine")
+                        {
+                        $disabled{"static-engine"} = "option";
+                        }
+                elsif ($1 eq "dynamic-engine")
+                        {
+                        delete $disabled{"static-engine"};
+                        }
                 else
                         {
                         $disabled{$1} = "option";
@@ -551,6 +563,14 @@ foreach (@argvcopy)
 		}
 	elsif (/^enable-(.+)$/)
 		{
+                if ($1 eq "static-engine")
+                        {
+                        delete $disabled{"static-engine"};
+                        }
+                elsif ($1 eq "dynamic-engine")
+                        {
+                        $disabled{"static-engine"} = "option";
+                        }
 		my $algo = $1;
 		delete $disabled{$algo};
 
@@ -984,20 +1004,13 @@ if ($target{shared_target} eq "")
 	$config{no_shared} = 1;
 	}
 
-if ($builder ne "mk1mf")
+if ($disabled{"static-engine"}) {
-	{
+        push @{$config{defines}}, "OPENSSL_NO_STATIC_ENGINE";
-	# add {no-}static-engine to options to allow mkdef.pl to work without extra arguments
+        $config{dynamic_engines} = 1;
-	if ($config{no_shared})
+} else {
-		{
+        push @{$config{defines}}, "OPENSSL_NO_DYNAMIC_ENGINE";
-		push @{$config{openssl_other_defines}}, "OPENSSL_NO_DYNAMIC_ENGINE";
+        $config{dynamic_engines} = 0;
-		$config{options}.=" static-engine";
+}
-		}
-	else
-		{
-		push @{$config{openssl_other_defines}}, "OPENSSL_NO_STATIC_ENGINE";
-		$config{options}.=" no-static-engine";
-		}
-	}
 
 #
 # Platform fix-ups
@@ -1371,8 +1384,8 @@ if ($builder eq "unified") {
             $unified_info{libraries}->{$library} = 1;
         }
 
-        die <<"EOF" if $config{no_shared} && scalar @engines;
+        die <<"EOF" if scalar @engines and !$config{dynamic_engines};
-ENGINES can only be used if configured with 'shared'.
+ENGINES can only be used if configured with 'static-enginex'.
 This is usually a fault in a build.info file.
 EOF
         foreach (@engines) {

Makefile.in

@@ -210,6 +210,7 @@ SHARED_LDFLAG={- $target{shared_ldflag}
                  . ($config{target} =~ m|^BSD-| && $prefix !~ m|^/usr/.*$|
                     ? " -Wl,-rpath,\$\$(LIBRPATH)" : "") -}
 SHARED_RCFLAG={- $target{shared_rcflag} -}
+DYNAMIC_ENGINES={- $config{dynamic_engines} -}
 
 GENERAL=        Makefile
 BASENAME=       openssl
@@ -254,7 +255,7 @@ BUILDENV=	LC_ALL=C PLATFORM='$(PLATFORM)' PROCESSOR='$(PROCESSOR)'\
 		AS='$(CC)' ASFLAG='$(CFLAG) -c'			\
 		AR='$(AR)' NM='$(NM)' RANLIB='$(RANLIB)'	\
 		CROSS_COMPILE='$(CROSS_COMPILE)'		\
-		PERL='$(PERL)'	\
+		PERL='$(PERL)' DYNAMIC_ENGINES='$(DYNAMIC_ENGINES)'	\
 		SDIRS='$(SDIRS)' LIBRPATH='$(INSTALLTOP)/$(LIBDIR)'	\
 		DESTDIR='$(DESTDIR)'		\
 		INSTALLTOP='$(INSTALLTOP)' OPENSSLDIR='$(OPENSSLDIR)'	\

engines/Makefile.in

@@ -57,7 +57,7 @@ top:
 all:	lib
 
 lib:	$(LIBOBJ) $(TESTLIBOBJ)
-	@if [ -n "$(SHARED_LIBS)" ]; then \
+	@if [ "$(DYNAMIC_ENGINES)" = 1 ]; then \
 		set -e; \
 		for l in $(LIBNAMES) $(TESTLIBNAMES); do \
 			$(MAKE) -f ../Makefile.shared -e \

engines/build.info

@@ -1,5 +1,5 @@
 {- use File::Spec::Functions qw/:DEFAULT rel2abs/; -}
-IF[{- $config{no_shared} -}]
+IF[{- !$config{dynamic_engines} -}]
  LIBS=../libcrypto
  SOURCE[../libcrypto]=\
         e_padlock.c {- $target{padlock_asm_src} -} \

util/mk1mf.pl

@@ -176,8 +176,6 @@ foreach (grep(!/^$/, split(/ /, $OPTIONS)))
 	print STDERR "unknown option - $_\n" if !&read_options;
 	}
 
-$no_static_engine = 0 if (!$shlib);
-
 $no_mdc2=1 if ($no_des);
 
 $no_ssl3=1 if ($no_md5);
@@ -1463,11 +1461,11 @@ sub read_options
 		{
 		$zlib_opt = 2;
 		}
-	elsif (/^no-static-engine/)
+	elsif (/^no-static-engine/ or /^enable-dynamic-engine/)
 		{
 		$no_static_engine = 1;
 		}
-	elsif (/^enable-static-engine/)
+	elsif (/^no-dynamic-engine/ or /^enable-static-engine/)
 		{
 		$no_static_engine = 0;
 		}