make tests buildable both as shared and static linkage. static builds make it easier to debug

test/Jamfile

@@ -25,6 +25,36 @@ ED25519_SOURCES =
 	verify
 	;
 
+rule link_test ( properties * )
+{
+	local result ;
+	if <link>shared in $(properties)
+	{
+		result +=
+			<library>libtorrent_test/<link>shared ;
+	}
+	else
+	{
+		result +=
+			<library>libtorrent_test/<link>static ;
+	}
+}
+
+rule link_libtorrent ( properties * )
+{
+	local result ;
+	if <link>shared in $(properties)
+	{
+		result +=
+			<library>/torrent//torrent/<link>shared/<boost-link>shared/<export-extra>on ;
+	}
+	else
+	{
+		result +=
+			<library>/torrent//torrent/<link>static/<boost-link>static/<export-extra>on ;
+	}
+}
+
 lib libtorrent_test
 	: # sources
 	setup_transfer.cpp
@@ -33,13 +63,13 @@ lib libtorrent_test
 	../ed25519/src/$(ED25519_SOURCES).c
 
 	: # requirements
-	<library>/torrent//torrent/<link>shared/<boost-link>shared/<export-extra>on
 	# this is used to determine whether
 	# symbols are exported or imported
 	<link>shared:<define>TORRENT_BUILDING_TEST_SHARED
 	<link>shared:<define>ED25519_BUILD_DLL
 	<include>../ed25519/src
 	<target-os>windows:<library>advapi32
+	<conditional>@link_libtorrent
 
 	: # default build
 	<link>shared
@@ -53,12 +83,13 @@ lib advapi32 : : <name>Advapi32 ;
 project
    : requirements
 	<source>main.cpp
-	<library>/torrent//torrent/<link>shared/<boost-link>shared/<export-extra>on
-	<library>libtorrent_test/<link>shared
+	<conditional>@link_test
+	<conditional>@link_libtorrent
    : default-build
 	<threading>multi
 	<invariant-checks>full
 	<debug-iterators>on
+	<link>shared
    ;
 
 feature launcher : none valgrind : composite ;