From 05d8c412ed763904c5b485f5260599328df328f8 Mon Sep 17 00:00:00 2001
From: Neil <njgodber@gmail.com>
Date: Wed, 23 Jun 2021 14:36:00 +1000
Subject: [PATCH] add support for win dll builds.

---
 CMakeLists.txt | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index d56c829..86fc735 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,5 +1,5 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 2.6)
-
+CMAKE_MINIMUM_REQUIRED(VERSION 3.0)
+option(BUILD_SHARED_LIBS "Build using shared libraries" OFF)
 PROJECT(Quartet)
 
 SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -O3 -DNDEBUG -Wall -funroll-loops")
@@ -17,14 +17,21 @@ SET(SRC_FILES src/predicates.cpp
               src/make_signed_distance.cpp
               src/make_tet_mesh.cpp)
 
-ADD_LIBRARY(quartet ${SRC_FILES})
+ADD_LIBRARY(quartet_obj OBJECT ${SRC_FILES})
+ADD_LIBRARY(quartet $<TARGET_OBJECTS:quartet_obj>)
 if(UNIX)
     TARGET_COMPILE_OPTIONS(quartet PRIVATE -fPIC)
     TARGET_LINK_LIBRARIES(quartet PRIVATE m)
 endif(UNIX)
 
 ADD_EXECUTABLE(quartet_bin src/main.cpp)
-TARGET_LINK_LIBRARIES(quartet_bin PRIVATE quartet)
+if(WIN32 AND BUILD_SHARED_LIBS)
+    ADD_LIBRARY(quartet_static STATIC  $<TARGET_OBJECTS:quartet_obj>)
+    TARGET_LINK_LIBRARIES(quartet_bin PRIVATE quartet_static)
+else()
+    TARGET_LINK_LIBRARIES(quartet_bin PRIVATE quartet)
+endif()
+
 SET_TARGET_PROPERTIES(quartet_bin PROPERTIES OUTPUT_NAME quartet)
 
 INSTALL(TARGETS quartet quartet_bin