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", info->idle);
}
构建:
gcc -o idle printXIdleTime.c -lX11 -lXss
我为 Go 的 cgo 重写了该代码:
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
}
尝试编译:
go build -gccgoflags="-lXss -lX11"
但是我收到链接器错误:
/tmp/go-build076004816/opensource.stdk/lib/tools/_obj/x11.cgo2.o:在函数
_cgo_c0e279f6f16e_Cfunc_XScreenSaverAllocInfo': ./x11.go:52: undefined reference to
XScreenSaverAllocInfo' /tmp/go-build076004816/opensource.stdk/lib/tools/_obj/x11.cgo2.o 中:在函数_cgo_c0e279f6f16e_Cfunc_XScreenSaverQueryInfo': ./x11.go:65: undefined reference to
XScreenSaverQueryInfo' collect2: error: ld returned 1 exit status
我究竟做错了什么?