From 082df7ab4a77c34685ec9c146931b5a5f176cd75 Mon Sep 17 00:00:00 2001
From: Nathan Hourt <nathan@followmyvote.com>
Date: Mon, 26 Oct 2020 17:02:22 -0500
Subject: [PATCH] Allow build of dynamic libraries

In order to support dynamically linked nodes based on Graphene, add
support for building dynamic libraries for the core Graphene
modules: chain, db, protocol, net, and utilities.
---
 CMakeLists.txt                     |  6 ++++--
 libraries/chain/CMakeLists.txt     | 16 ++++++++++------
 libraries/db/CMakeLists.txt        | 15 ++++++++++++++-
 libraries/net/CMakeLists.txt       |  6 +++++-
 libraries/protocol/CMakeLists.txt  |  7 ++++++-
 libraries/utilities/CMakeLists.txt | 13 ++++++++++---
 6 files changed, 49 insertions(+), 14 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index debcd378..82a21c3d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -10,6 +10,9 @@ set( CUSTOM_URL_SCHEME "gcs" )
 set( INSTALLER_APP_ID "68ad7005-8eee-49c9-95ce-9eed97e5b347" )
 set( CMAKE_CXX_STANDARD 14 )
 
+set( GRAPHENE_BUILD_DYNAMIC_LIBRARIES OFF CACHE BOOL
+     "Whether to build dynamic libraries instead of static. Applies only to chain, db, protocol, net, and utilities" )
+
 # http://stackoverflow.com/a/18369825
 if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
     if (CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.8)
@@ -162,8 +165,7 @@ endif()
 
 add_subdirectory( libraries )
 
-
-set(BUILD_BITSHARES_PROGRAMS TRUE CACHE BOOL "Build bitshares executables (witness node, cli wallet, etc)")
+set(BUILD_PEERPLAYS_PROGRAMS TRUE CACHE BOOL "Build peerplays executables (witness node, cli wallet, etc)")
 add_subdirectory( programs )
 
 set(BUILD_BITSHARES_TESTS TRUE CACHE BOOL "Build bitshares unit tests")
diff --git a/libraries/chain/CMakeLists.txt b/libraries/chain/CMakeLists.txt
index 8d13885a..3319aedf 100755
--- a/libraries/chain/CMakeLists.txt
+++ b/libraries/chain/CMakeLists.txt
@@ -19,12 +19,16 @@ else( GRAPHENE_DISABLE_UNITY_BUILD )
    message( STATUS "Graphene database unity build enabled" )
 endif( GRAPHENE_DISABLE_UNITY_BUILD )
 
-## SORT .cpp by most likely to change / break compile
-add_library( graphene_chain
-             ${CPP_FILES}
-             ${HEADERS}
-             "${CMAKE_CURRENT_BINARY_DIR}/include/graphene/chain/hardfork.hpp"
-           )
+set( GRAPHENE_CHAIN_FILES
+     ${CPP_FILES}
+     ${HEADERS}
+     "${CMAKE_CURRENT_BINARY_DIR}/include/graphene/chain/hardfork.hpp"
+   )
+if (NOT ${GRAPHENE_BUILD_DYNAMIC_LIBRARIES})
+    add_library( graphene_chain ${GRAPHENE_CHAIN_FILES} )
+else()
+    add_library( graphene_chain SHARED ${GRAPHENE_CHAIN_FILES} )
+endif()
 
 add_dependencies( graphene_chain build_hardfork_hpp )
 target_link_libraries( graphene_chain fc graphene_db graphene_protocol )
diff --git a/libraries/db/CMakeLists.txt b/libraries/db/CMakeLists.txt
index b0899d86..8ec6fea1 100644
--- a/libraries/db/CMakeLists.txt
+++ b/libraries/db/CMakeLists.txt
@@ -1,5 +1,18 @@
 file(GLOB HEADERS "include/graphene/db/*.hpp")
-add_library( graphene_db undo_database.cpp index.cpp object_database.cpp ${HEADERS} )
+
+set( GRAPHENE_DB_FILES
+     undo_database.cpp
+     index.cpp
+     object_database.cpp
+     ${HEADERS}
+    )
+
+if (NOT ${GRAPHENE_BUILD_DYNAMIC_LIBRARIES})
+    add_library( graphene_db ${GRAPHENE_DB_FILES} )
+else()
+    add_library( graphene_db SHARED ${GRAPHENE_DB_FILES} )
+endif()
+
 target_link_libraries( graphene_db graphene_protocol fc )
 target_include_directories( graphene_db PUBLIC "${CMAKE_CURRENT_SOURCE_DIR}/include" )
 
diff --git a/libraries/net/CMakeLists.txt b/libraries/net/CMakeLists.txt
index 806864af..2dcc2c78 100644
--- a/libraries/net/CMakeLists.txt
+++ b/libraries/net/CMakeLists.txt
@@ -9,7 +9,11 @@ set(SOURCES node.cpp
             message.cpp
             message_oriented_connection.cpp)
 
-add_library( graphene_net ${SOURCES} ${HEADERS} )
+if (NOT ${GRAPHENE_BUILD_DYNAMIC_LIBRARIES})
+    add_library( graphene_net ${SOURCES} ${HEADERS} )
+else()
+    add_library( graphene_net SHARED ${SOURCES} ${HEADERS} )
+endif()
 
 target_link_libraries( graphene_net
   PUBLIC fc graphene_db graphene_protocol )
diff --git a/libraries/protocol/CMakeLists.txt b/libraries/protocol/CMakeLists.txt
index a96e3bfe..8c05638f 100644
--- a/libraries/protocol/CMakeLists.txt
+++ b/libraries/protocol/CMakeLists.txt
@@ -42,7 +42,12 @@ list(APPEND SOURCES account.cpp
                     )
 
 
-add_library( graphene_protocol ${SOURCES} ${HEADERS} )
+if (NOT ${GRAPHENE_BUILD_DYNAMIC_LIBRARIES})
+    add_library( graphene_protocol ${SOURCES} ${HEADERS} )
+else()
+    add_library( graphene_protocol SHARED ${SOURCES} ${HEADERS} )
+endif()
+
 target_link_libraries( graphene_protocol fc )
 target_include_directories( graphene_protocol PUBLIC "${CMAKE_CURRENT_SOURCE_DIR}/include" )
 
diff --git a/libraries/utilities/CMakeLists.txt b/libraries/utilities/CMakeLists.txt
index 98086b10..22decaf7 100644
--- a/libraries/utilities/CMakeLists.txt
+++ b/libraries/utilities/CMakeLists.txt
@@ -20,9 +20,16 @@ set(sources
 configure_file("${CMAKE_CURRENT_SOURCE_DIR}/git_revision.cpp.in" "${CMAKE_CURRENT_BINARY_DIR}/git_revision.cpp" @ONLY)
 list(APPEND sources "${CMAKE_CURRENT_BINARY_DIR}/git_revision.cpp")
 
-add_library( graphene_utilities
-             ${sources}
-             ${HEADERS} )
+if (NOT ${GRAPHENE_BUILD_DYNAMIC_LIBRARIES})
+    add_library( graphene_utilities
+                 ${sources}
+                 ${HEADERS} )
+else()
+    add_library( graphene_utilities SHARED
+                 ${sources}
+                 ${HEADERS} )
+endif()
+
 target_link_libraries( graphene_utilities fc )
 target_include_directories( graphene_utilities
                             PUBLIC "${CMAKE_CURRENT_SOURCE_DIR}/include" )