英文:
why report the error " undefined reference to `add2" when I used cgo
问题
目录如下：
- include
- Test.h
- lib
- libmytest.so
- src
- test.go
test.go代码如下：
package main
/*
#cgo CFLAGS : -I ../include
#cgo LDFLAGS: -L ../lib -lmytest
#include "Test.h"
*/
import "C"
func main() {
C.add2(10, 10)
}
当我使用go build test.go时，控制台报告如下错误：# command-line-arguments
/tmp/go-build168903458/command-line-arguments/_obj/test.cgo2.o: 在函数 _cgo_9efddd4c1a4b_Cfunc_add2' 中： rocketmq-bridge/src/cgo-gcc-prolog:42: 对 add2' 的引用未定义
collect2: error: ld 返回了 1 个退出状态
英文:
The directory is follow:<br>
-inlcude<br>
Test.h<Br>
-lib<br>
libmytest.so<br>
-src<br>
test.go<Br>
The test.go code is follow:<br>
package main
/*
#cgo CFLAGS : -I ../include
#cgo LDFLAGS: -L ../lib -lmytest
#include "Test.h"
*/
import "C"
func main() {
C.add2(10, 10)
}
When I use go build test.go, the console report that: # command-line-arguments
/tmp/go-build168903458/command-line-arguments/_obj/test.cgo2.o: In function _cgo_9efddd4c1a4b_Cfunc_add2':add2'
rocketmq-bridge/src/cgo-gcc-prolog:42: undefined reference to
collect2: error: ld returned 1 exit status
答案1
得分: 1
请不要在CFLAGS后面添加空格，并且在构建cgo时尝试不指定文件名，即：
go build
可选地，可以在构建选项中添加-x，然后观察编译器是否正确地将相应的文件（INCLUDE和LIB）添加到其选项中，即：
go build -x
英文:
Do not add space after CFLAGS, and try without specifying the filename when building cgo, i.e.
go build
Optionally, add -x to the build options, then observe whether the compiler correctly add the corresponding files (INCLUDE and LIB) to its option, i.e.
go build -x
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