所以我對構建我自己的makefiles相當陌生。我有一個奇怪的問題,我需要運行make兩次才能生成可執行文件。我有多個文件,它們位於多個子文件夾中。每個包含文件的文件夾都有自己的makefile。在該make文件中,我生成我的對象文件,然後將對象文件推送到主目錄。一旦生成了所有的對象文件,我就繼續嘗試創建我的可執行文件。爲什麼我需要運行我的makefile兩次來編譯我的代碼
這是我運行其他makefile的主makefile。
# Declaration of variables
CC = g++
CFLAGS=-std=c++0x -Wall -lboost_system -lpthread
INCLUDE_PATH0=SocketIO/SocketServer/
INCLUDE_PATH1=SocketIO/SocketServer/SocketSession/
EXEC = run
SOURCES = $(wildcard *.cpp)
OBJECTS = $(SOURCES:.cpp=.o)
TARGETS = SocketSess SocketServ maincpp
$(EXEC): $(TARGETS) $(wildcard *.o)
$(CC) $(wildcard *.o) $(CFLAGS) -o $(EXEC)
maincpp: $(SOURCES)
$(CC) $(CFLAGS) -I$(INCLUDE_PATH0) -I$(INCLUDE_PATH1) -c $(SOURCES)
ls
SocketSess:
cd ./SocketIO/SocketServer/SocketSession ; make SocketSess
SocketServ:
cd ./SocketIO/SocketServer ; make SocketServ
# To remove generated files
clean:
rm -f $(EXEC) $(wildcard *.o)
cd ./SocketIO/SocketServer/SocketSession ; make clean
cd ./SocketIO/SocketServer ; make clean
這是我的一個子makefiles。
# Declaration of variables
CC = g++
CFLAGS=-std=c++0x -Wall -lboost_system -lpthread
INCLUDE_PATH=SocketSession/
#Just build object file do not link yet
SocketServ: SocketServer.cpp SocketServer.h
$(CC) $(CFLAGS) -I$(INCLUDE_PATH) -c SocketServer.cpp
mv *.o ../../
clean:
rm -f *.o*
這是我得到的錯誤。
Main.cpp Main.o Makefile SocketIO SocketServer.o SocketSession.o test
g++ -std=c++0x -Wall -lboost_system -lpthread -o run
/usr/bin/ld: /usr/lib/debug/usr/lib/x86_64-linux-gnu/crt1.o(.debug_info): relocation 0 has invalid symbol index 11
/usr/bin/ld: /usr/lib/debug/usr/lib/x86_64-linux-gnu/crt1.o(.debug_info): relocation 1 has invalid symbol index 12
/usr/bin/ld: /usr/lib/debug/usr/lib/x86_64-linux-gnu/crt1.o(.debug_info): relocation 2 has invalid symbol index 2
/usr/bin/ld: /usr/lib/debug/usr/lib/x86_64-linux-gnu/crt1.o(.debug_info): relocation 3 has invalid symbol index 2
/usr/bin/ld: /usr/lib/debug/usr/lib/x86_64-linux-gnu/crt1.o(.debug_info): relocation 4 has invalid symbol index 11
/usr/bin/ld: /usr/lib/debug/usr/lib/x86_64-linux-gnu/crt1.o(.debug_info): relocation 5 has invalid symbol index 13
/usr/bin/ld: /usr/lib/debug/usr/lib/x86_64-linux-gnu/crt1.o(.debug_info): relocation 6 has invalid symbol index 13
/usr/bin/ld: /usr/lib/debug/usr/lib/x86_64-linux-gnu/crt1.o(.debug_info): relocation 7 has invalid symbol index 13
/usr/bin/ld: /usr/lib/debug/usr/lib/x86_64-linux-gnu/crt1.o(.debug_info): relocation 8 has invalid symbol index 12
/usr/bin/ld: /usr/lib/debug/usr/lib/x86_64-linux-gnu/crt1.o(.debug_info): relocation 9 has invalid symbol index 13
/usr/bin/ld: /usr/lib/debug/usr/lib/x86_64-linux-gnu/crt1.o(.debug_info): relocation 10 has invalid symbol index 13
/usr/bin/ld: /usr/lib/debug/usr/lib/x86_64-linux-gnu/crt1.o(.debug_info): relocation 11 has invalid symbol index 13
/usr/bin/ld: /usr/lib/debug/usr/lib/x86_64-linux-gnu/crt1.o(.debug_info): relocation 12 has invalid symbol index 13
/usr/bin/ld: /usr/lib/debug/usr/lib/x86_64-linux-gnu/crt1.o(.debug_info): relocation 13 has invalid symbol index 13
/usr/bin/ld: /usr/lib/debug/usr/lib/x86_64-linux-gnu/crt1.o(.debug_info): relocation 14 has invalid symbol index 13
/usr/bin/ld: /usr/lib/debug/usr/lib/x86_64-linux-gnu/crt1.o(.debug_info): relocation 15 has invalid symbol index 13
/usr/bin/ld: /usr/lib/debug/usr/lib/x86_64-linux-gnu/crt1.o(.debug_info): relocation 16 has invalid symbol index 13
/usr/bin/ld: /usr/lib/debug/usr/lib/x86_64-linux-gnu/crt1.o(.debug_info): relocation 17 has invalid symbol index 13
/usr/bin/ld: /usr/lib/debug/usr/lib/x86_64-linux-gnu/crt1.o(.debug_info): relocation 18 has invalid symbol index 13
/usr/bin/ld: /usr/lib/debug/usr/lib/x86_64-linux-gnu/crt1.o(.debug_info): relocation 19 has invalid symbol index 21
/usr/bin/ld: /usr/lib/debug/usr/lib/x86_64-linux-gnu/crt1.o(.debug_line): relocation 0 has invalid symbol index 2
/usr/lib/gcc/x86_64-linux-gnu/4.8/../../../x86_64-linux-gnu/crt1.o: In function `_start':
(.text+0x20): undefined reference to `main'
collect2: error: ld returned 1 exit status
make: *** [run] Error 1
'$(通配符* .o)':第一次運行makefile時沒有'.o'文件,所以這將是空的。也許你的意思是'$(OBJECTS)',但是你的Makefile有各種各樣的怪異需要修復。 – user657267 2014-11-06 02:49:38
您希望規則的makefile目標與規則創建的文件名相匹配。例如,您的SocketServ規則不會生成該文件。它使得../../SocketServer.o成爲規則目標。 – 2014-11-06 02:52:00
這一行:$(CC)$(CFLAGS)-I $(INCLUDE_PATH)-c SocketServer.cpp需要另一個參數,或許:-o SocketServer.o – user3629249 2014-11-06 03:00:21