如何从文件中正确添加 gdi32.lib? [英] How to add gdi32.lib correctly from within the file?
问题描述
我目前在 Windows 上的 C 项目中包含 gdi32.lib
时遇到问题.错误发生在以下代码段:
I'm currently having a problem with including the gdi32.lib
in my C project on windows. The error occurs in the following code segment:
#include <windows.h>
#pragma comment(lib, "kernel32.lib")
#pragma comment(lib, "user32.lib")
#pragma comment(lib, "gdi32.lib")
int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) {
WNDCLASSEX wcx;
wcx.hbrBackground = CreateSolidBrush(0x000000);
....
}
当我使用 -lgdi32
选项进行编译时,一切都按预期工作,而使用以下命令出现编译错误:
When I compile with the -lgdi32
option, everything works just as expected, whereas I get a compiling error with the following command:
C:\projects\cpp>c++ project.cpp
C:\Users\LUKASW~1\AppData\Local\Temp\ccSKc5qg.o:project.cpp:(.text+0xe0):
undefined reference to `__imp_CreateSolidBrush'
collect2.exe: error: ld returned 1 exit status
有没有办法直接在文件中链接库,而不是每次都将其传递给编译器?
Is there a way to link the libraries directly in a file rather than passing it to the compiler every time?
这是用于调试的精简版本:
Here is the stripped down version for debugging:
#include <windows.h>
#pragma comment(lib, "kernel32.lib")
#pragma comment(lib, "user32.lib")
#pragma comment(lib, "gdi32.lib")
static char szWindowClass[] = "debugging";
static char szTitle[] = "gdi32.lib test";
HINSTANCE hInst;
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
void GetDesktopResolution(int& w, int& h) {
RECT desktop;
GetWindowRect(GetDesktopWindow(), &desktop);
w = desktop.right;
h = desktop.bottom;
}
int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) {
WNDCLASSEX wcx;
wcx.cbClsExtra = 0;
wcx.cbSize = sizeof(WNDCLASSEX);
wcx.cbWndExtra = 0;
wcx.hbrBackground = CreateSolidBrush(0x000000);
wcx.hCursor = LoadCursor(NULL, IDC_ARROW);
wcx.hIcon = LoadIcon(hInst, IDI_APPLICATION);
wcx.hIconSm = LoadIcon(wcx.hInstance, IDI_APPLICATION);
wcx.hInstance = hInst;
wcx.lpfnWndProc = WndProc;
wcx.lpszClassName = szWindowClass;
wcx.lpszMenuName = NULL;
wcx.style = CS_HREDRAW | CS_VREDRAW;
RegisterClassEx(&wcx);
int x, y,
w = 600,
h = 600;
GetDesktopResolution(x, y);
HWND hWnd = CreateWindowEx(WS_EX_APPWINDOW, szWindowClass, szTitle, WS_POPUP, (x - w) / 2, (y - h) / 2, w, h, NULL, NULL, hInst, NULL);
ShowWindow(hWnd, nCmdShow);
UpdateWindow(hWnd);
MSG msg;
while(GetMessage(&msg, NULL, 0, 0)) {
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return (int) msg.wParam;
}
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam) {
switch (message) {
case WM_PAINT:
// empty
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
break;
}
return 0;
}
推荐答案
#pragma comment(lib, ...)
是一个 MS Visual C/C++ 编译指示.您正在使用不支持该指令的 MinGW.
#pragma comment(lib, ...)
is an MS Visual C/C++ pragma. You are using MinGW, which doesn't support that directive.
从我读到的这个问题、GCC 和 G++没有等效的编译指示,因此您必须坚持使用 -l
选项.
From what I read on this question, GCC and G++ don't have an equivalent pragma, so you will have to stick with the -l
option.
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