老师您好，我又来了，?，

D:/MyWorkHome/Apps/Tools/Msys2/install/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/10.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: CMakeFiles\calculator.dir/objects.a(unit_test_ui.c.obj):D:/MyWorkHome/CodeSpace/CSpace/C-MOOC/chapter5/unit_test_ui.c:11: multiple definition of `uiContext'; CMakeFiles\calculator.dir/objects.a(console_ui.c.obj):D:/MyWorkHome/CodeSpace/CSpace/C-MOOC/chapter5/console_ui.c:8: first defined here
collect2.exe: error: ld returned 1 exit status

//unit_test_ui.c
#include "unit_test_ui.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>


UiContext *uiContext;

//console_ui.c
#include "console_ui.h"
#include <stdlib.h>
#include <stdio.h>
UiContext *uiContext;

老师，这个怎么就重复定义了呢，是不是CMakelists文件有问题？

cmake_minimum_required(VERSION 3.13.4)

get_filename_component(ProjectId ${CMAKE_CURRENT_SOURCE_DIR} NAME)
string(REPLACE " " "_" ProjectId ${ProjectId})
project(${ProjectId} C)

set(CMAKE_C_STANDARD 11)

include_directories("include")

if (WIN32)
set(DEPS gtk+-3.0)
elseif (APPLE)
set(DEPS gtk+-3.0 glib-2.0)
else()
set(DEPS gtk+-3.0)
endif ()

# Use the package PkgConfig to detect GTK+ headers/library files
FIND_PACKAGE(PkgConfig REQUIRED)

foreach (dep ${DEPS})
PKG_CHECK_MODULES(${dep} REQUIRED ${dep})

INCLUDE_DIRECTORIES(${${dep}_INCLUDE_DIRS})
LINK_DIRECTORIES(${${dep}_LIBRARY_DIRS})
endforeach ()

if (WIN32)
set(CMAKE_C_FLAGS_RELEASE -mwindows)
endif()

file(GLOB files "${CMAKE_CURRENT_SOURCE_DIR}/*.c")
add_executable(calculator ${files})

foreach (dep ${DEPS})
target_link_libraries(calculator ${${dep}_LIBRARIES})
endforeach ()

唉，，，，