使用cgo包装时生成错误<;调度/调度。h>;
我正在玩XPC、GCD和go,但当我的代码无法编译时,我遇到了一个很快的问题,出现了以下错误消息(我不理解):使用cgo包装时生成错误<;调度/调度。h>;,go,Go,我正在玩XPC、GCD和go,但当我的代码无法编译时,我遇到了一个很快的问题,出现了以下错误消息(我不理解): main(\uuuuuu DATA/\uuuuuuuu const):动态符号的意外重新链接\u NSConcreteGlobalBlock main(\uuuuu DATA/\uuuuu const):未经处理的针对\u NSConcreteGlobalBlock的重新定位(类型28 rtype 120) 我正在使用go build编译以下代码: main.go package ma
main(\uuuuuu DATA/\uuuuuuuu const):动态符号的意外重新链接\u NSConcreteGlobalBlock
main(\uuuuu DATA/\uuuuu const):未经处理的针对\u NSConcreteGlobalBlock的重新定位(类型28 rtype 120)
我正在使用go build
编译以下代码:
main.go
package main
/*
#include <xpc/xpc.h>
#include "wrapper.h"
*/
import "C"
import (
"fmt"
)
//export HandleXPCEvent
func HandleXPCEvent(event C.xpc_object_t) {
fmt.Println("Event was handled")
}
func main() {
name := C.CString("com.example.xpc")
queue := C.dispatch_queue_create(name, nil)
conn := C.xpc_connection_create(name, queue)
C.set_event_handler(conn)
//C.xpc_connection_resume(conn)
}
由go build-x-WORK
生成的$WORK dir的内容:
我对编译和链接不是很熟悉,因此我无法理解这个输出。我刚刚注意到,\u cgo\u import.c
由cgo生成的文件(带有选项-dynimport
和-dynout
)在与链接器给出的错误消息相关的第一行中有\pragma cgo\u import\u dynamic
希望这些信息有助于找出问题所在以及如何解决问题。我对这些库不太了解,但这里的代码并没有让我感到意外 可以从
go build-x-work
获得一些有用的调试输出,它将为您打印命令和工作目录
工作目录将保持不变,以便您可以查看cgo为您生成的代码。加上它将为您打印的命令,您应该可以开始跟踪问题了。我编写了一个包装器,用于在Cocoa应用程序中使用Go和XPC 它位于这里:
谢谢你的提示。我用
go build-x work
的输出更新了问题的描述。不幸的是,我自己也不能理解它。学习-x选项有帮助,谢谢!
#ifndef _WRAPPER_H_
#define _WRAPPER_H_
#include <stdlib.h>
#include <stdio.h>
#include <xpc/xpc.h>
xpc_connection_t connect( char* name);
void set_event_handler(xpc_connection_t connection);
#endif
#include "wrapper.h"
#include <dispatch/dispatch.h>
extern void HandleXPCEvent(xpc_object_t);
xpc_connection_t connect( char* name) {
dispatch_queue_t queue = dispatch_queue_create(name,0);
return xpc_connection_create(name,queue);
}
void set_event_handler(xpc_connection_t connection) {
xpc_connection_set_event_handler(connection, ^(xpc_object_t event) {
xpc_retain(event);
// Call Go function
HandleXPCEvent(event);
});
}
➣ go build -x -work
WORK=/var/folders/fb/bgfqk8wx5x16w7yh2cg50vrw0000gn/T/go-build524335717
mkdir -p $WORK/github.com/gabrielayuso/go-xpc/_obj/
mkdir -p $WORK/github.com/gabrielayuso/go-xpc/_obj/exe/
cd /Users/gabrielayuso/Documents/Workspace/Projects/go/src/github.com/gabrielayuso/go-xpc
/usr/local/go/pkg/tool/darwin_amd64/cgo -objdir $WORK/github.com/gabrielayuso/go-xpc/_obj/ -- -I $WORK/github.com/gabrielayuso/go-xpc/_obj/ main.go
/usr/local/go/pkg/tool/darwin_amd64/6c -F -V -w -I $WORK/github.com/gabrielayuso/go-xpc/_obj/ -I /usr/local/go/pkg/darwin_amd64 -o $WORK/github.com/gabrielayuso/go-xpc/_obj/_cgo_defun.6 -D GOOS_darwin -D GOARCH_amd64 $WORK/github.com/gabrielayuso/go-xpc/_obj/_cgo_defun.c
gcc -I . -g -O2 -fPIC -m64 -pthread -fno-common -print-libgcc-file-name
gcc -I . -g -O2 -fPIC -m64 -pthread -fno-common -I $WORK/github.com/gabrielayuso/go-xpc/_obj/ -o $WORK/github.com/gabrielayuso/go-xpc/_obj/_cgo_main.o -c $WORK/github.com/gabrielayuso/go-xpc/_obj/_cgo_main.c
gcc -I . -g -O2 -fPIC -m64 -pthread -fno-common -I $WORK/github.com/gabrielayuso/go-xpc/_obj/ -o $WORK/github.com/gabrielayuso/go-xpc/_obj/_cgo_export.o -c $WORK/github.com/gabrielayuso/go-xpc/_obj/_cgo_export.c
gcc -I . -g -O2 -fPIC -m64 -pthread -fno-common -I $WORK/github.com/gabrielayuso/go-xpc/_obj/ -o $WORK/github.com/gabrielayuso/go-xpc/_obj/main.cgo2.o -c $WORK/github.com/gabrielayuso/go-xpc/_obj/main.cgo2.c
gcc -I . -g -O2 -fPIC -m64 -pthread -fno-common -I $WORK/github.com/gabrielayuso/go-xpc/_obj/ -o $WORK/github.com/gabrielayuso/go-xpc/_obj/wrapper.o -c ./wrapper.c
gcc -I . -g -O2 -fPIC -m64 -pthread -fno-common -o $WORK/github.com/gabrielayuso/go-xpc/_obj/_cgo_.o $WORK/github.com/gabrielayuso/go-xpc/_obj/_cgo_main.o $WORK/github.com/gabrielayuso/go-xpc/_obj/_cgo_export.o $WORK/github.com/gabrielayuso/go-xpc/_obj/main.cgo2.o $WORK/github.com/gabrielayuso/go-xpc/_obj/wrapper.o
/usr/local/go/pkg/tool/darwin_amd64/cgo -objdir $WORK/github.com/gabrielayuso/go-xpc/_obj/ -dynimport $WORK/github.com/gabrielayuso/go-xpc/_obj/_cgo_.o -dynout $WORK/github.com/gabrielayuso/go-xpc/_obj/_cgo_import.c
/usr/local/go/pkg/tool/darwin_amd64/6c -F -V -w -I $WORK/github.com/gabrielayuso/go-xpc/_obj/ -I /usr/local/go/pkg/darwin_amd64 -o $WORK/github.com/gabrielayuso/go-xpc/_obj/_cgo_import.6 -D GOOS_darwin -D GOARCH_amd64 $WORK/github.com/gabrielayuso/go-xpc/_obj/_cgo_import.c
gcc -I . -g -O2 -fPIC -m64 -pthread -fno-common -o $WORK/github.com/gabrielayuso/go-xpc/_obj/_all.o $WORK/github.com/gabrielayuso/go-xpc/_obj/_cgo_export.o $WORK/github.com/gabrielayuso/go-xpc/_obj/main.cgo2.o $WORK/github.com/gabrielayuso/go-xpc/_obj/wrapper.o -Wl,-r -nostdlib /usr/llvm-gcc-4.2/bin/../lib/gcc/i686-apple-darwin11/4.2.1/x86_64/libgcc.a
/usr/local/go/pkg/tool/darwin_amd64/6g -o $WORK/github.com/gabrielayuso/go-xpc/_obj/_go_.6 -p github.com/gabrielayuso/go-xpc -D _/Users/gabrielayuso/Documents/Workspace/Projects/go/src/github.com/gabrielayuso/go-xpc -I $WORK $WORK/github.com/gabrielayuso/go-xpc/_obj/_cgo_gotypes.go $WORK/github.com/gabrielayuso/go-xpc/_obj/main.cgo1.go
/usr/local/go/pkg/tool/darwin_amd64/pack grcP $WORK $WORK/github.com/gabrielayuso/go-xpc.a $WORK/github.com/gabrielayuso/go-xpc/_obj/_go_.6 $WORK/github.com/gabrielayuso/go-xpc/_obj/_cgo_import.6 $WORK/github.com/gabrielayuso/go-xpc/_obj/_cgo_defun.6 $WORK/github.com/gabrielayuso/go-xpc/_obj/_all.o
cd .
/usr/local/go/pkg/tool/darwin_amd64/6l -o $WORK/github.com/gabrielayuso/go-xpc/_obj/exe/a.out -L $WORK $WORK/github.com/gabrielayuso/go-xpc.a
# github.com/gabrielayuso/go-xpc
main(__DATA/__const): unexpected reloc for dynamic symbol _NSConcreteGlobalBlock
main(__DATA/__const): unhandled relocation for _NSConcreteGlobalBlock (type 28 rtype 120)