Header Only Library multiple definition errors [duplicate] - c++

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multiple definition of a function
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Multiple definition and header-only libraries
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I am having trouble in including a header only library. In my main Application when I include the header file it works fine, now when I need to reference some of the classes from it in a different file then I get multiple definition errors. I checked the header only file has #pragma once and #ifndef checks added
Here is the code (webview.h) which is a header only library included here.
Window.h
#pragma once
#include <memory>
#include <filesystem>
#include <webview.h>
namespace HL {
struct Props {
int width;
int height;
std::string title;
Props(const std::string& title = "My Test Application",
uint32_t width = 1600,
uint32_t height = 900)
: title(title), width(width), height(height)
{
}
};
class Window {
public:
Window(const Props& props)
{
init(props);
}
static Window* create(const Props props)
{
return new Window(props);
}
~Window()
{
terminate();
}
void terminate()
{
mWebview.terminate();
}
void init(const Props& props )
{
mProps.width = props.width;
mProps.height = props.height;
mProps.title = props.title;
mWebview = webview::webview(true, nullptr);
mWebview.set_title(mProps.title);
mWebview.set_size(1080, 800, WEBVIEW_HINT_NONE);
std::string uiFile = std::filesystem::current_path().u8string() + std::string("/ui/build/index.html");
mWebview.navigate(std::string("file://") + uiFile);
mWebview.run();
}
private:
webview::webview mWebview;
int mWidth = 1080;
int mHeight = 800;
std::string mTitle = "";
Props mProps;
};
};
Application.h
#pragma once
#include <Focus.h>
#include <string>
#include <memory>
#include "Window.h"
namespace HL
{
class Application : public Focus::Application
{
private:
Window *mWindow;
public:
Application(Focus::Sqlite* db): BaseApplication(db)
{
FOCUS_LOG_INFO("Initializing DB");
db->init();
}
void run()
{
startClients();
mWindow = Window::create(Props("Test Application"));
}
Window& getWindow()
{
return *mWindow;
}
void loadPlugins()
{
}
};
}
EventManager.h
Here is when I include Window.h which has webview.h include I get the linker errors
#pragma once
#include <memory>
#include <sqlite3.h>
#include "Event.h"
#include <string>
#include <json.hpp>
#include <sstream>
#include "Window.h"
using json = nlohmann::json;
namespace HL
{
class EventManager
{
private:
Window mWindow;
sqlite3* mDB;
public:
EventManager(Window& window, sqlite3* db) : mWindow(window), mDB(db) {}
void bindAll();
void persist(Event& event);
};
};
And the errors
/usr/bin/ld: CMakeFiles/hl.dir/src/main.cpp.o: in function `webview_create':
/home/naveed/Projects/hl/desktop/vendor/webview/webview.h:1305: multiple definition of `webview_create'; CMakeFiles/hl.dir/src/EventManager.cpp.o:/home/naveed/Projects/hl/desktop/vendor/webview/webview.h:1305: first defined here
/usr/bin/ld: CMakeFiles/hl.dir/src/main.cpp.o: in function `webview_destroy':