链接库生成、使用

.gitignore

@@ -6,3 +6,5 @@
 .DS_Store
 # cmake build dir
 build/
+lib/Debug/
+lib/Release/

CMakeLists.txt

@@ -6,7 +6,7 @@ cmake_minimum_required(VERSION 3.16)
 
 #------------REQUIRED_2 指定项目名及项目版本------------#
 project(
-    WireRouting # 项目名称没有什么特别的用处。这里没有添加任何的目标(target)
+    WireRoutingProject # 项目名称没有什么特别的用处。这里没有添加任何的目标(target)
     VERSION 1.0
     DESCRIPTION "A project for wire routing" # CMake 3.9+ 特性
     # 语言可以是 C,CXX,Fortran,ASM,CUDA(CMake 3.8+),CSharp(3.8+),SWIFT(CMake 3.15+ experimental)
@@ -64,7 +64,7 @@ message(STATUS "Self added CMAKE_MODULE_PATH: ${CMAKE_MODULE_PATH}")
 # igl_include(glfw) # igl_include_optional(glfw) Enable the target igl::glfw
 
 
-
+ADD_SUBDIRECTORY(lib)
 
 #------------REQUIRED_3 添加可执行文件------------#
 # 不要使用file函数中GLOB来收集文件：如果不重新运行 CMake，Make 或者其他的工具将不会知道你是否添加了某个文件
@@ -75,6 +75,12 @@ add_executable(
     ${SRC_DIR} 
 )
 
+# add_custom_command(
+#     TARGET ${PROJECT_NAME} POST_BUILD
+#     COMMAND ${CMAKE_COMMAND} -E copy_directory
+#     ${CMAKE_SOURCE_DIR}/lib/$(IntDir)/WireRouting.dll $(outdir)
+# )
+file(COPY ${CMAKE_SOURCE_DIR}/lib/Debug/WireRouting.dll DESTINATION ${PROJECT_BINARY_DIR}/Debug)
 
 #------------REQUIRED_5.2 将库链接到目标（通常是一个可执行文件），这个命令告诉 CMake 在构建目标时需要链接哪些库------------#
 # target_link_libraries(${PROJECT_NAME} PUBLIC {lib_name1} {lib_name1} ...)
@@ -93,6 +99,11 @@ else()
     )
 endif()
 
+target_link_libraries(
+    ${PROJECT_NAME} PUBLIC
+    ${PROJECT_SOURCE_DIR}/lib/Debug/WireRouting.lib
+)
+
 
 #------------OPTIONAL_1.2 添加生成的config.h头文件所在目录------------#
 # 为目标添加了一个目录，源码中的 #include "config.h" 将会被解析为 ${PROJECT_BINARY_DIR}/config.h
@@ -102,7 +113,7 @@ target_include_directories(
     # INTERFACE（只影响依赖）
     ${PROJECT_NAME} PUBLIC 
     ${PROJECT_BINARY_DIR} # config.h.in 会生成配置在 build 目录
-    include
+    ${CMAKE_SOURCE_DIR}/include
     ${TINYXML_INCLUDE_DIR} # tinyxml库的头文件目录
     ${TINYXML_INCLUDE_DIRS} # pkg-config tinyxml dir
 )

include/Point.h

@@ -1,11 +1,32 @@
+#pragma once
+
+#ifdef MY_LIB_SHARED_BUILD
+    #ifdef _WIN32
+        #ifdef MY_LIB_EXPORTS
+            #define POINT_LIB_API __declspec(dllexport)
+        #else
+            #define POINT_LIB_API __declspec(dllimport)
+        #endif  // MY_LIB_EXPORTS
+    #else
+        #define POINT_LIB_API
+    #endif  // _WIN32
+#else
+    #define POINT_LIB_API
+#endif  // MY_LIB_SHARED_BUILD
+
+
 #include <string>
 #include <iostream>
 #include <cmath>
 #include <iomanip>
+
 using namespace std;
-const double eps = 1e-6;
-#define Equal(a, b) ((fabs(a - b) < eps) ? true : false)
-struct P
+
+extern "C" POINT_LIB_API const double eps = 1e-6;
+
+extern "C" POINT_LIB_API bool Equal(double a, double b);
+
+extern "C" struct POINT_LIB_API P
 {
 	double x, y, z;	   // 坐标
 	double dx, dy, dz; // 方向

lib/CMakeLists.txt

@@ -0,0 +1,22 @@
+aux_source_directory(${CMAKE_SOURCE_DIR}/lib SRC_FILES_IN_LIB)
+message(STATUS "SRC_FILES_IN_LIB: ${SRC_FILES_IN_LIB}")
+
+add_library(WireRouting SHARED ${SRC_FILES_IN_LIB})
+target_compile_definitions(WireRouting PUBLIC -DMY_LIB_SHARED_BUILD)
+target_compile_definitions(WireRouting PRIVATE -DMY_LIB_EXPORTS)
+
+INSTALL(TARGETS WireRouting DESTINATION ${CMAKE_SOURCE_DIR}/lib)
+
+SET_TARGET_PROPERTIES(
+    WireRouting PROPERTIES LINKER_LANGUAGE C
+    ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_SOURCE_DIR}/lib
+    RUNTIME_OUTPUT_DIRECTORY ${CMAKE_SOURCE_DIR}/lib
+    LIBRARY_OUTPUT_DIRECTORY ${CMAKE_SOURCE_DIR}/lib
+    OUTPUT_NAME "WireRouting"
+    PREFIX ""
+)
+
+target_include_directories(
+    WireRouting PUBLIC 
+    ${CMAKE_SOURCE_DIR}/include
+)

src/Point.cpp → lib/Point.cpp

@@ -1,5 +1,9 @@
 #include "Point.h"
 
+bool Equal(double a, double b)
+{
+	return ((fabs(a - b) < eps) ? true : false);
+}
 
 bool P::operator<(P B) const
 {