c++ - 目标 'Project1.exe' 的配方失败

Question

我尝试在 Dev-C++ 中编译一个简单的 c 文件，它在第 25 行显示错误C:\Users\varun\Desktop\cprog\Makefile.win 目标“Project1.exe”的配方失败。

生成文件.win

# Project: Project1
# Makefile created by Dev-C++ 5.6.2

CPP      = g++.exe
CC       = gcc.exe
WINDRES  = windres.exe
OBJ      = main.o Untitled2.o
LINKOBJ  = main.o Untitled2.o
LIBS     = -L"C:/Program Files (x86)/Dev-Cpp/MinGW64/lib" -L"C:/Program Files (x86)/Dev-Cpp/MinGW64/x86_64-w64-mingw32/lib" -static-libgcc
INCS     = -I"C:/Program Files (x86)/Dev-Cpp/MinGW64/include" -I"C:/Program Files (x86)/Dev-Cpp/MinGW64/x86_64-w64-mingw32/include" -I"C:/Program Files (x86)/Dev-Cpp/MinGW64/lib/gcc/x86_64-w64-mingw32/4.8.1/include"
CXXINCS  = -I"C:/Program Files (x86)/Dev-Cpp/MinGW64/include" -I"C:/Program Files (x86)/Dev-Cpp/MinGW64/x86_64-w64-mingw32/include" -I"C:/Program Files (x86)/Dev-Cpp/MinGW64/lib/gcc/x86_64-w64-mingw32/4.8.1/include" -I"C:/Program Files (x86)/Dev-Cpp/MinGW64/lib/gcc/x86_64-w64-mingw32/4.8.1/include/c++"
BIN      = Project1.exe
CXXFLAGS = $(CXXINCS) 
CFLAGS   = $(INCS) 
RM       = rm.exe -f

.PHONY: all all-before all-after clean clean-custom

all: all-before $(BIN) all-after

clean: clean-custom
    ${RM} $(OBJ) $(BIN)

$(BIN): $(OBJ)
    **$(CC) $(LINKOBJ) -o $(BIN) $(LIBS)**

main.o: main.c
    $(CC) -c main.c -o main.o $(CFLAGS)

Untitled2.o: Untitled2.c
    $(CC) -c Untitled2.c -o Untitled2.o $(CFLAGS)

错误

C:\Users\varun\Desktop\cprog\Untitled2.o    Untitled2.c:(.text+0x0): multiple definition of `main'
C:\Users\varun\Desktop\cprog\main.o main.c:(.text+0x0): first defined here
C:\Users\varun\Desktop\cprog\collect2.exe   [Error] ld returned 1 exit status
25      C:\Users\varun\Desktop\cprog\Makefile.win   recipe for target 'Project1.exe' failed

Answer 1

输出的重要部分是:

C:\Users\varun\Desktop\cprog\Untitled2.o    Untitled2.c:(.text+0x0): multiple definition of `main'

它告诉你，你有两个函数定义 main .您在可执行文件中恰好需要一个这样的定义。错误的下一行告诉您该定义在哪里:

C:\Users\varun\Desktop\cprog\main.o main.c:(.text+0x0): first defined here

所以你有函数 main在 Untitled2.c 中定义你还有另一个功能 main在 main.c 中定义.删除其中一个。从名字上看可能是main.c完全没有必要，但如果不看文件我就无法判断。