C++ 如何编写混合C和C++的makefile
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how to write makefile mixing C and C++
提问by Dan
In this Makefile, I don't know how to compile out c objects in the same Makefile mixing C and C++. If I first compile the C objects and then run this Makefile, it works. Can anyone help to fix it for me? Thanks in advance!
在这个 Makefile 中，我不知道如何在混合 C 和 C++ 的同一个 Makefile 中编译出 c 对象。如果我首先编译 C 对象，然后运行这个 Makefile，它就可以工作。任何人都可以帮我修复它吗？提前致谢！
CXX = g++
CXXFLAGS = -Wall -D__STDC_LIMIT_MACROS
SERVER_SRC = \
main.cpp
SERVER_SRC_OBJS = ${SERVER_SRC:.cpp=.o}
REDIS_SRC = \
$(HIREDIS_FOLDER)/net.c \
$(HIREDIS_FOLDER)/hiredis.c \
$(HIREDIS_FOLDER)/sds.c \
$(HIREDIS_FOLDER)/async.c
REDIS_SRC_OBJS = ${REDIS_SRC:.c=.o}
.SUFFIXES:
.SUFFIXES: .o .cpp
.cpp.o:
$(CXX) $(CXXFLAGS) -I$(HIREDIS_FOLDER) \
-c $< -o $*.o
all: server
net.o: net.c fmacros.h net.h hiredis.h
async.o: async.c async.h hiredis.h sds.h dict.c dict.h
hiredis.o: hiredis.c fmacros.h hiredis.h net.h sds.h
sds.o: sds.c sds.h
server: $(SERVER_SRC_OBJS) $(REDIS_SRC_OBJS)
mkdir -p bin
$(CXX) $(CXXFLAGS) -o bin/redis_main \
-I$(HIREDIS_FOLDER) \
$(REDIS_SRC_OBJS) \
$(SERVER_SRC_OBJS) \
-lpthread \
-lrt \
-Wl,-rpath,./
.PHONY: clean
clean:
$(RM) -r bin/redis_main
$(RM) ./*.gc??
$(RM) $(SERVER_SRC_OBJS)
$(RM) $(REDIS_SRC_OBJS)
回答by paulsm4
G++ can and will compile both .c and .cpp source files just fine.
G++ 可以并且会编译 .c 和 .cpp 源文件就好了。
What you reallyneed to do is add dependencies for "server" target. For example:
您真正需要做的是为“服务器”目标添加依赖项。例如：
OBJ = net.o hiredis.o sds.o async.o
...
all: server
server: $(OBJ)
There are some really good tips in this Howto.
这个 Howto 中有一些非常好的技巧。
回答by drodil
You can do that by compiling first the C files and then straight after the CPP files. This might work (at least worked in one of my projects):
您可以通过先编译 C 文件然后直接编译 CPP 文件来做到这一点。这可能有效（至少在我的一个项目中有效）：
CXX = g++
CC = gcc
CFLAGS = -Wall -c
CXXFLAGS = -Wall -D__STDC_LIMIT_MACROS
OUTPUTDIR = ./bin/
MKDIR = mkdir -p $(OUTPUTDIR)
OBJECTC = redis.o
CSOURCES = \
$(HIREDIS_FOLDER)/net.c \
$(HIREDIS_FOLDER)/hiredis.c \
$(HIREDIS_FOLDER)/sds.c \
$(HIREDIS_FOLDER)/async.c
CXXSOURCES = \
main.cpp
all: server
server:
$(MKDIR)
$(CC) $(CSOURCES) $(CFLAGS) -o $(OUTPUTDIR)$(OBJECTC)
$(CXX) $(OUTPUTDIR)$(OBJECTC) $(CXXSOURCES) -o $(OUTPUTDIR)server
.PHONY: clean
clean:
$(RM) -rf $(OUTPUTDIR)
$(RM) ./*.gc??
$(RM) ./*.o
Feel free to change it if you see a more proper way to do it :)
如果您看到更合适的方法，请随时更改它:)
