From c3e50476af5dcee67336fbc277d95e9f7452c0bc Mon Sep 17 00:00:00 2001
From: Eric Frias <efrias@syncad.com>
Date: Thu, 25 Jun 2015 13:57:10 -0400
Subject: [PATCH] Don't use the autoconf build system for secp256k1 on Windows

---
 CMakeLists.txt | 56 ++++++++++++++++++++++++++++++++------------------
 1 file changed, 36 insertions(+), 20 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index e445e0d..cfc1512 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -50,28 +50,44 @@ ELSE( ECC_IMPL STREQUAL openssl )
 ENDIF( ECC_IMPL STREQUAL openssl )
 
 # Configure secp256k1-zkp
+if ( WIN32 )
+    # autoconf won't work here, hard code the defines
+    set( SECP256K1_DIR "${CMAKE_CURRENT_SOURCE_DIR}/vendor/secp256k1-zkp" )
+    
+    file( GLOB SECP256K1_SOURCES "${SECP256K1_DIR}/src/secp256k1.c" )
+    add_library( secp256k1 ${SECP256K1_SOURCES} )
+    
+    target_include_directories( secp256k1 PRIVATE "${SECP256K1_DIR}" PUBLIC "${SECP256K1_DIR}/include" )
+    
+    set( SECP256K1_BUILD_DEFINES
+        USE_FIELD_10X26
+        USE_FIELD_INV_BUILTIN
+        USE_NUM_NONE
+        USE_SCALAR_8X32
+        USE_SCALAR_INV_BUILTIN )
+    set_target_properties( secp256k1 PROPERTIES COMPILE_DEFINITIONS "${SECP256K1_BUILD_DEFINES}" LINKER_LANGUAGE C )
+else ( WIN32 )
+    include(ExternalProject)
+    ExternalProject_Add( project_secp256k1
+     PREFIX ${CMAKE_CURRENT_BINARY_DIR}/vendor/secp256k1-zkp
+     SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/vendor/secp256k1-zkp
+     CONFIGURE_COMMAND ${CMAKE_CURRENT_SOURCE_DIR}/vendor/secp256k1-zkp/configure --prefix=${CMAKE_CURRENT_BINARY_DIR}/vendor/secp256k1-zkp
+     BUILD_COMMAND make
+     INSTALL_COMMAND make install
+    )
+    ExternalProject_Add_Step(project_secp256k1 autogen
+     WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/vendor/secp256k1-zkp
+     COMMAND ./autogen.sh
+     DEPENDERS configure
+    )
 
-include(ExternalProject)
-ExternalProject_Add( project_secp256k1
- PREFIX ${CMAKE_CURRENT_BINARY_DIR}/vendor/secp256k1-zkp
- SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/vendor/secp256k1-zkp
- CONFIGURE_COMMAND ${CMAKE_CURRENT_SOURCE_DIR}/vendor/secp256k1-zkp/configure --prefix=${CMAKE_CURRENT_BINARY_DIR}/vendor/secp256k1-zkp
- BUILD_COMMAND make
- INSTALL_COMMAND make install
-)
-ExternalProject_Add_Step(project_secp256k1 autogen
- WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/vendor/secp256k1-zkp
- COMMAND ./autogen.sh
- DEPENDERS configure
-)
-
-ExternalProject_Get_Property(project_secp256k1 install_dir)
-
-add_library(secp256k1 STATIC IMPORTED)
-set_property(TARGET secp256k1 PROPERTY IMPORTED_LOCATION ${install_dir}/lib/libsecp256k1.a)
-set_property(TARGET secp256k1 PROPERTY INTERFACE_INCLUDE_DIRECTORIES ${CMAKE_CURRENT_SOURCE_DIR}/vendor/secp256k1-zkp/include)
-add_dependencies(secp256k1 project_secp256k1)
+    ExternalProject_Get_Property(project_secp256k1 install_dir)
 
+    add_library(secp256k1 STATIC IMPORTED)
+    set_property(TARGET secp256k1 PROPERTY IMPORTED_LOCATION ${install_dir}/lib/libsecp256k1.a)
+    set_property(TARGET secp256k1 PROPERTY INTERFACE_INCLUDE_DIRECTORIES ${CMAKE_CURRENT_SOURCE_DIR}/vendor/secp256k1-zkp/include)
+    add_dependencies(secp256k1 project_secp256k1)
+endif ( WIN32 )
 # End configure secp256k1-zkp
 
 IF( WIN32 )