我正在设计我的第一个C++程序,但是我很难理解如何安装和使用名为pugixml的第三方库。
这是我的结构:
我相信我打算将所有的pugixml都转储到我的include文件夹中的pug文件夹中,然后像这样从我的Makefile中引用它:
CC = g++
CFLAGS = -g -Wall -std=c++11
SRC = src
INCLUDES = include
TARGET = main
all: $(TARGET)
$(TARGET): $(SRC)/$(TARGET).cpp pugi/pugixml.cpp
$(CC) $(CFLAGS) -I $(INCLUDES) -o $@ $^
clean:
$(RM) $(TARGET)
但是,当我运行Makefile或出现此错误时:
main in main-bf0b72.o
"pugi::xml_node::children(char const*) const", referenced from:
_main in main-bf0b72.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [main] Error 1
有人告诉我这是由于您已将pugi cpp文件放入include中。
问题
代码编辑
#include "pugi/pugixml.hpp"
#include <iostream>
#include <string>
#include <map>
int main() {
pugi::xml_document doca, docb;
std::map<std::string, pugi::xml_node> mapa, mapb;
if (!doca.load_file("a.xml") || !docb.load_file("b.xml"))
return 1;
for (auto& node: doca.child("site_entries").children("entry")) {
const char* id = node.child_value("id");
mapa[id] = node;
}
for (auto& node: docb.child("site_entries").children("entry"))
const char* idcs = node.child_value("id");
if (!mapa.erase(id)) {
mapb[id] = node;
}
}
最佳答案
我现在无法验证,但是很可能您只需要用pugi/pugixml.cpp
替换include/pugi/pugixml.cpp
即可。