enabled libsecp256k1 on windows

libdevcrypto/CMakeLists.txt

@@ -24,10 +24,8 @@ target_link_libraries(${EXECUTABLE} ${DB_LIBRARIES})
 target_link_libraries(${EXECUTABLE} ${CRYPTOPP_LIBRARIES})
 target_link_libraries(${EXECUTABLE} scrypt)
 target_link_libraries(${EXECUTABLE} devcore)
-if (NOT WIN32)
-	add_definitions(-DETH_HAVE_SECP256K1)
-	target_link_libraries(${EXECUTABLE} secp256k1)
-endif ()
+add_definitions(-DETH_HAVE_SECP256K1)
+target_link_libraries(${EXECUTABLE} secp256k1)
 
 install( TARGETS ${EXECUTABLE} RUNTIME DESTINATION bin ARCHIVE DESTINATION lib LIBRARY DESTINATION lib )
 install( FILES ${HEADERS} DESTINATION include/${EXECUTABLE} )

test/CMakeLists.txt

@@ -75,9 +75,7 @@ target_link_libraries(testeth ${CURL_LIBRARIES})
 target_link_libraries(testeth ${CRYPTOPP_LIBRARIES})
 target_link_libraries(testeth ethereum)
 target_link_libraries(testeth ethcore)
-if (NOT WIN32)
-	target_link_libraries(testeth secp256k1)
-endif()
+target_link_libraries(testeth secp256k1)
 
 if (JSCONSOLE)
 	target_link_libraries(testeth jsengine)