From e6cdd671c0881e3c570bbcfd256e90140782e279 Mon Sep 17 00:00:00 2001
From: cn-nice <wuwei.gt@gmail.com>
Date: Thu, 7 Sep 2023 18:29:20 +0800
Subject: [PATCH] fix(CMakeLists): build fails when using cmake on mac with
 Xcode as generator.

---
 CMakeLists.txt | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index f5c1e5535..a1507ea42 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -495,6 +495,22 @@ target_compile_features (glog_internal PUBLIC $<TARGET_PROPERTY:glog,COMPILE_FEA
 add_library (glog
   $<TARGET_OBJECTS:glog_internal>
 )
+
+# Note: When you use cmake to build with xcode as a generator under Mac, the build will fail.
+# See https://cmake.org/cmake/help/latest/command/add_library.html#object-libraries
+if(CMAKE_GENERATOR STREQUAL "Xcode")
+  file(MAKE_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp)
+  set(temporary_file "${CMAKE_CURRENT_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/xcode.cpp")
+
+  add_custom_command(
+    OUTPUT ${temporary_file}
+    COMMAND ${CMAKE_COMMAND} -E touch ${temporary_file}
+    COMMENT "Creating temporary files for building on Xcode"
+  )
+
+  target_sources(glog PRIVATE $<$<BOOL:${temporary_file}>:${temporary_file}>)
+endif(CMAKE_GENERATOR STREQUAL "Xcode")
+
 target_compile_features (glog PUBLIC cxx_std_14)
 
 add_library (glog::glog ALIAS glog)