update cmakelists

CMakeLists.txt

@@ -2,8 +2,28 @@ cmake_minimum_required(VERSION 3.15.2)
 
 # 设置工程名称和语言
 project(LIBLBFGS VERSION 1.1.0)
-# 设置安装地址 改用homebrew安装后这一句就不需要了
-set(CMAKE_INSTALL_PREFIX /usr/local)
+
+if(${CMAKE_HOST_SYSTEM_NAME} STREQUAL "Linux")
+	message(STATUS "Platform: " ${CMAKE_HOST_SYSTEM_NAME})
+	set(CMAKE_INSTALL_PREFIX "/usr/local")
+elseif (${CMAKE_HOST_SYSTEM_NAME} STREQUAL "Darwin")
+	message(STATUS "Platform: " ${CMAKE_HOST_SYSTEM_NAME})
+	set(CMAKE_INSTALL_PREFIX "/usr/local")
+elseif (${CMAKE_HOST_SYSTEM_NAME} STREQUAL "Windows")
+	message(STATUS "Platform: " ${CMAKE_HOST_SYSTEM_NAME})
+	set(CMAKE_C_COMPILER gcc)
+	set(CMAKE_CXX_COMPILER g++)
+	# CMake中的路径分隔符统一为UNIX格式 不需要使用反斜杠 否则会报警
+	set(CMAKE_INSTALL_PREFIX "D:/Library")
+else()
+	message(STATUS "Platform: " ${CMAKE_HOST_SYSTEM_NAME})
+	set(CMAKE_INSTALL_PREFIX "/usr/local")
+endif()
+message(STATUS "Install prefix: " ${CMAKE_INSTALL_PREFIX})
+
+# 添加源文件地址
+add_subdirectory(src/)
+
 # 添加编译选项
 option(HAVE_CONFIG_H "use config.h" ON)
 option(_MSC_VER "use __msc_ver" OFF)
@@ -13,5 +33,3 @@ configure_file(
   "${PROJECT_SOURCE_DIR}/config.h.in"
   "${PROJECT_SOURCE_DIR}/src/lib/config.h"
   )
-# 添加源文件地址
-add_subdirectory(src/)