c++ - 在makefile中添加头文件和相关修改

Question

我有一个 C++ 程序，我正在尝试为它制作一个头文件，并取出一些函数并将它们放在一个单独的文件中。我有一些错误，下面我描述了我的方法。如果有人能指导我了解这里可能出现的问题，我将不胜感激。

我有一个带有以下树的 C++ 程序

.
├── main
|    └── mymain.cc
├── makefile
├── obj
├── solver
└── data

和以下主文件:

#include <iostream>
#include <vector>
#include <string>
#include <fstream>
#include <sstream>

extern "C" void solver_();

class DataHandler
{
 public:
    DataHandler() {}
    std::vector<std::vector<double> > Read2D(std::string fileName);
 };

int main( int argc, char **argv ) {

    DataHandler fileIO;
    std::vector<std::vector<double> > perm;
    perm = fileIO.Read2D("../../../data/perm.dat");


    return(0); 

}

    std::vector<std::vector<double> > DataHandler::Read2D(std::string fileName)
 {
    // Some codes . . .
 }

和以下生成文件:

# GNU Makefile
# Paths
MDIR=./main
SDIR=./solver
ODIR=./obj
_CASE=WorkCases/problem
CASE=$(SDIR)/$(_CASE)
TOP = .  

#
# set compilers
FC          =       ifort
CC          =       icc
CXX         =       icc
LINKLIB     =       -lstdc++ -std=c++11 -lifcore

FFLAGS          =       -fpp -O1 -DPTR_INTEGER8 -warn nousage -module $(ODIR)
CCFLAG          =       -O1 -DDATABASE_INTERFACE_LOWERCASE -DDATABASE_APPEND_UNDERSCORE
CXXFLAGS        =       -O1 

#
# Define rules to make
$(ODIR)/%.o : $(SDIR)/%.f90 
    $(FC) -c $(FFLAGS) $< -o $@

$(ODIR)/%.o : $(MDIR)/%.cc
    $(CXX) $(CXXFLAG) -c $< -o $@

#
# set executable name based on DB and CASE
EXEC    =   $(dir ${CASE})/$(basename $(notdir ${CASE})).out

#
# main files
MAIN_OBJ    =   $(ODIR)/mymain.o

#
# variables
_SOME_OBJ   =       sample1.o sample2.o sample3.o
SOME_OBJ    =   $(patsubst %,$(ODIR)/%,$(_SHARED_OBJ))

_OBJ     =  ${_SOME_OBJ} $(_CASE).PARAMS.o
OBJ = $(patsubst %,$(ODIR)/%,$(_OBJ))

MORE_OBJ = $(ODIR)/more.o

wlt_3d : ${SOME_OBJ} $(OBJ) $(MORE_OBJ) $(MAIN_OBJ)
    $(CXX) $(CXXFLAGS) $(OBJ) $(MORE_OBJ)  $(MAIN_OBJ) -o $(EXEC) $(LINKLIB)

我想添加一个头文件并将函数带到另一个文件中。我修改的树:

.
├── main
|    └── mymain.cc
├── inc
|    └── DataHandler.hpp
├── src
|    └── DataHandler.cpp
├── makefile
├── obj
├── solver
└── data

我修改的主要内容:

#include <iostream>
#include <vector>
#include <string>
#include <fstream>
#include <sstream>

#include "DataHandler.hpp"

extern "C" void solver_();

int main( int argc, char **argv ) {

    DataHandler fileIO;
    std::vector<std::vector<double> > perm;
    perm = fileIO.Read2D("../../../data/perm.dat");


    return(0); 

}

我的新头文件:

#ifndef DH_HEADER
#define DH_HEADER

#include <iostream>
#include <vector>
#include <string>
#include <fstream>
#include <sstream>

class DataHandler
{
 public:
    DataHandler() {}
    std::vector<std::vector<double> > Read2D(std::string fileName);
 };

#endif

和对应的cpp文件:

#include <iostream>
#include <vector>
#include <string>
#include <fstream>
#include <sstream>

#include "DataHandler.hpp"
    std::vector<std::vector<double> > DataHandler::Read2D(std::string fileName)
 {
    // Some codes . . .
 }

我正在如下修改makefile

# GNU Makefile
# Paths
MDIR=./main
SDIR=./solver
ODIR=./obj
SRC=./src
IDIR=./inc
_CASE=WorkCases/problem
CASE=$(SDIR)/$(_CASE)
TOP = .  

#
# set compilers
FC          =       ifort
CC          =       icc
CXX         =       icc
LINKLIB     =       -lstdc++ -std=c++11 -lifcore

FFLAGS          =       -fpp -O1 -DPTR_INTEGER8 -warn nousage -module $(ODIR)
CCFLAG          =       -O1 -DDATABASE_INTERFACE_LOWERCASE -DDATABASE_APPEND_UNDERSCORE
CXXFLAGS        =       -O1 

#
# c++ include files:
DEPS=$(IDIR)/DataHandler.hpp

#
# Define rules to make
$(ODIR)/%.o : $(SDIR)/%.f90 
    $(FC) -c $(FFLAGS) $< -o $@

$(ODIR)/%.o : $(MDIR)/%.cc $(DEPS)
    $(CXX) $(CXXFLAG) -c $^ -o $@

$(ODIR)/%.o : $(SRC)/%.cpp $(DEPS)
    $(CXX) $(CXXFLAG) -c $^ -o $@

#
# set executable name based on DB and CASE
EXEC    =   $(dir ${CASE})/$(basename $(notdir ${CASE})).out

#
# main files
MAIN_OBJ    =   $(ODIR)/mymain.o

_SRC_OBJ    =   DataHandler.o
SRC_OBJ     =   $(patsubst %,$(ODIR)/%,$(_SRC_OBJ))

#
# variables
_SOME_OBJ   =       sample1.o sample2.o sample3.o
SOME_OBJ    =   $(patsubst %,$(ODIR)/%,$(_SHARED_OBJ))

_OBJ     =  ${_SOME_OBJ} $(_CASE).PARAMS.o
OBJ = $(patsubst %,$(ODIR)/%,$(_OBJ))

MORE_OBJ = $(ODIR)/more.o

wlt_3d : ${SOME_OBJ} $(OBJ) $(MORE_OBJ) $(SRC_OBJ) $(MAIN_OBJ)
    $(CXX) $(CXXFLAGS) $(OBJ) $(MORE_OBJ)  $(SRC_OBJ) $(MAIN_OBJ) -o $(EXEC) $(LINKLIB) 

但是，我收到以下错误。

icc  -c src/DataHandler.cpp inc/DataHandler.hpp -o obj/DataHandler.o
src/DataHandler.cpp(7): catastrophic error: cannot open source file 
"DataHandler.hpp"
  #include "DataHandler.hpp"
                        ^

compilation aborted for src/DataHandler.cpp (code 4)

谁能给我反馈为什么会这样？

Answer 1

您忘记将 dependents 文件夹添加到编译器的包含路径。添加-I$(dependents_folder_name) 到编译规则