Build for windows with CMake

NTL provides zip file with some changes to its source code to make
Windows happy. However, they don't provide any build system but refer
people to some creative clicking in Visual Studio.

Author: saraedum

recipe/build.bat

@@ -0,0 +1,2 @@
+cmake .
+msbuild ALL_BUILD.vcxproj

recipe/cmake.patch

@@ -0,0 +1,15 @@
+--- /dev/null	2019-01-16 21:39:07.828957088 +0100
++++ CMakeLists.txt	2019-01-17 03:36:35.265918586 +0100
+@@ -0,0 +1,12 @@
++cmake_minimum_required(VERSION 3.6)
++project(NTL)
++
++set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
++
++file(GLOB SOURCES src/*.cpp)
++include_directories(include)
++add_library(${PROJECT_NAME} SHARED ${SOURCES})
++
++install(TARGETS ${PROJECT_NAME} DESTINATION lib/${PROJECT_NAME})
++file(GLOB HEADERS include/*.h)
++install(FILES ${HEADERS} DESTINATION include/${PROJECT_NAME})

recipe/meta.yaml

@@ -7,12 +7,15 @@ package:
 
 source:
   fn: {{ name }}-{{ version }}.tar.gz
-  url: http://www.shoup.net/ntl/ntl-{{ version }}.tar.gz
-  sha256: 84ba3145abf8d5f3be6832a14c60b3368eb920719ee96e5774587e71ecd66e9d
+  url: http://www.shoup.net/ntl/ntl-{{ version }}.tar.gz                   # [not win]
+  url: https://www.shoup.net/ntl/WinNTL-{{ version }}.zip                  # [win]
+  sha256: 84ba3145abf8d5f3be6832a14c60b3368eb920719ee96e5774587e71ecd66e9d # [not win]
+  sha256: 7488f980ed1b84828f0baea1948233fec328047b27b33a0c3822820f13cc77e2 # [win]
+  patches:
+    - cmake.patch    # [win]
 
 build:
-  number: 1000
-  skip: true        # [win]
+  number: 1002
   track_features:
     - ntl
   run_exports:
@@ -24,6 +27,7 @@ requirements:
     - automake
     - {{ compiler('c') }}
     - {{ compiler('cxx') }}
+    - cmake    # [win]
   host:
     - gf2x
     - gmp
@@ -50,3 +54,4 @@ about:
 extra:
   recipe-maintainers:
     - isuruf
+    - saraedum