Linker go+;cgo与链接
我想使用以下c作为Go的cgo:Linker go+;cgo与链接,linker,go,cgo,Linker,Go,Cgo,我想使用以下c作为Go的cgo: #include <X11/extensions/scrnsaver.h> main() { XScreenSaverInfo *info = XScreenSaverAllocInfo(); Display *display = XOpenDisplay(0); XScreenSaverQueryInfo(display, DefaultRootWindow(display), info); printf("%u ms\n",
#include <X11/extensions/scrnsaver.h>
main() {
XScreenSaverInfo *info = XScreenSaverAllocInfo();
Display *display = XOpenDisplay(0);
XScreenSaverQueryInfo(display, DefaultRootWindow(display), info);
printf("%u ms\n", info->idle);
}
package tools
// #cgo pkg-config: x11
// #include <X11/extensions/scrnsaver.h>
import "C"
func GetIdleTime() (idleTime uint32) {
var info *C.XScreenSaverInfo
var display *C.Display
info = C.XScreenSaverAllocInfo()
display = C.XOpenDisplay(0)
defaultRootWindow := C.XDefaultRootWindow(display)
C.XScreenSaverQueryInfo(display, defaultRootWindow, info)
idleTime = info.idle
return
}
我为Go的cgo重新编写了代码:
#include <X11/extensions/scrnsaver.h>
main() {
XScreenSaverInfo *info = XScreenSaverAllocInfo();
Display *display = XOpenDisplay(0);
XScreenSaverQueryInfo(display, DefaultRootWindow(display), info);
printf("%u ms\n", info->idle);
}
package tools
// #cgo pkg-config: x11
// #include <X11/extensions/scrnsaver.h>
import "C"
func GetIdleTime() (idleTime uint32) {
var info *C.XScreenSaverInfo
var display *C.Display
info = C.XScreenSaverAllocInfo()
display = C.XOpenDisplay(0)
defaultRootWindow := C.XDefaultRootWindow(display)
C.XScreenSaverQueryInfo(display, defaultRootWindow, info)
idleTime = info.idle
return
}
但是,我收到链接器错误:
/tmp/go-build076004816/opensource.stdk/lib/tools/_obj/x11.cgo2.o:In
函数\u cgo\u c0e279f6f16e\u Cfunc\u XScreenSaverAllocInfo':./x11.go:52:
对
XScreenSaverAllocInfo'的未定义引用
/tmp/go-build076004816/opensource.stdk/lib/tools/_obj/x11.cgo2.o:In
函数\u cgo\u c0e279f6f16e\u Cfunc\u XScreenSaverQueryInfo':./x11.go:65:
未定义对
XScreenSaverQueryInfo'collect2的引用:错误:ld
返回1退出状态
我做错了什么?这就是我构建它的方式。请注意
#cgo LDFLAGS
行,这可能是您缺少的内容。我不得不做一些其他的修改来构建它。在我的Linux机器上,它似乎返回了正确的答案
package tools
// #cgo LDFLAGS: -lXss -lX11
// #include <X11/extensions/scrnsaver.h>
import "C"
func GetIdleTime() (idleTime uint32) {
var info *C.XScreenSaverInfo
var display *C.Display
info = C.XScreenSaverAllocInfo()
display = C.XOpenDisplay(nil)
defaultRootWindow := C.XDefaultRootWindow(display)
C.XScreenSaverQueryInfo(display, C.Drawable(defaultRootWindow), info)
idleTime = uint32(info.idle)
return
}
软件包工具
//#cgo LDFLAGS:-lXss-lX11
//#包括
输入“C”
func GetIdleTime()(idleTime uint32){
var info*C.XScreenSaverInfo
变量显示*C显示
info=C.XScreenSaverAllocInfo()
显示=C.xOpen显示(无)
defaultRootWindow:=C.XDefaultRootWindow(显示)
C.XScreenSaverQueryInfo(显示,C.Drawable(defaultRootWindow),信息)
空闲时间=uint32(信息空闲)
返回
}
请注意,这可以通过本机和屏幕保护程序扩展完成:
package main
import (
"fmt"
"log"
"github.com/BurntSushi/xgb"
"github.com/BurntSushi/xgb/xproto"
"github.com/BurntSushi/xgb/screensaver"
)
func main() {
X, err := xgb.NewConn()
if err != nil {
log.Fatal(err)
}
if err = screensaver.Init(X); err != nil {
log.Fatal(err)
}
root := xproto.Setup(X).DefaultScreen(X).Root
info, err := screensaver.QueryInfo(X, xproto.Drawable(root)).Reply()
if err != nil {
log.Fatal(err)
}
fmt.Printf("Idle: %d\n", info.MsSinceUserInput)
}
产出:
[andrew@Liger go] go run xscreensaver_idle.go
Idle: 1040
gos XGB的问题是,如果我的家庭中没有.XAuthority,那么NewConn()将失败,并显示消息“Can not connect”(无法连接),XGB将发出警告消息,但无论如何都要连接。您能否提交一份带有测试用例和环境描述的bug报告?