update cmakelists

CMakeLists.txt

@@ -1,8 +1,5 @@
 cmake_minimum_required(VERSION 3.15.2)
-# 设置cxx编译器
-# 如果你使用别的编译器，请在这里修改
-#set(CMAKE_C_COMPILER /usr/local/bin/gcc-9)
-#set(CMAKE_CXX_COMPILER /usr/local/bin/g++-9)
+
 # 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
@@ -17,4 +14,4 @@ configure_file(
   "${PROJECT_SOURCE_DIR}/src/lib/config.h"
   )
 # 添加源文件地址
-add_subdirectory(src/)
+add_subdirectory(src/)

src/CMakeLists.txt

@@ -17,9 +17,9 @@ set_target_properties(lbfgs PROPERTIES VERSION 1.1 SOVERSION 1.1)
 # 设置库文件的输出地址
 set(LIBRARY_OUTPUT_PATH ${PROJECT_BINARY_DIR}/lib)
 # 在LINUX中需添加math库
-message("Operating system: ${CMAKE_SYSTEM}")
-if(UNIX)
-	message("Linking math library.")
+message("-- Operating system: ${CMAKE_SYSTEM}")
+if(UNIX AND NOT APPLE)
+	message("-- Linking math library.")
 	find_library(MATH_LIBRARY m)
 	find_library(MATH_A_LIBRARY libm.a)
 	target_link_libraries(lbfgs PUBLIC ${MATH_LIBRARY})