Hello gophers,
I am reposting here the question I just made on Stack Overflow at https://stackoverflow.com/questions/66305363/link-go-against-a-static-32-bit-3rd-party-library I don't know if it is acceptable posting there and here. I saw that sometimes people ask here and in the Golang developer list and get advised to not post on both lists. But there is a focus difference between the two lists. So, I think that posting here and on Stack Overflow is not the same case. If I misunderstood things, just let me know and this will not happen again. So, about my question, I am using the flags below: ``` #cgo CFLAGS: -I. #cgo LDFLAGS: -L. -lcluto #include <malloc.h> #include "cluto.h" ``` and when I compile with ``` go build clutod.go ``` The compiler fails with error ``` /usr/bin/ld: pulando ../../../../gopkg/src/dawn/plugins/cluto/clutobot/libcluto.a incompatível ao pesquisar para -lcluto /usr/bin/ld: não foi possível localizar -lcluto collect2: error: ld returned 1 exit status ``` Which means that it finds that libcluto.a is incompatible because it is a 32 bit library and my system is compiling Go to amd64 architecture. But when I compile with ``` GOARCH=386 go build clutod.go ``` The method defined in the same source file where 'import "C"' is defined is simply ignored. I checked with reflect and the method does not exist: ``` Goose.New.Logf(5,"|methods|=%d",typ.NumMethod()) Goose.New.Logf(5,"type=%s.%s",typ.PkgPath(),typ.Name()) for j=0; j<typ.NumMethod(); j++ { mt := typ.Method(j) Goose.New.Logf(5,"%d: %s",j,mt.Name) } Goose.New.Logf(5,"*|methods|=%d",typPtr.NumMethod()) Goose.New.Logf(5,"*type=%s.%s",typPtr.PkgPath(),typPtr.Name()) for j=0; j<typPtr.NumMethod(); j++ { mt := typPtr.Method(j) Goose.New.Logf(5,"%d: *%s",j,mt.Name) } Goose.New.Logf(1,"Method not found: %s, Data: %#v",methodName,typ) return nil, errors.New(fmt.Sprintf("Method not found: %s",methodName)) ``` The code above produces the following output: ``` 2021/02/21 14:33:50 {stonelizard}[New.go]<New>(296): |methods|=10 2021/02/21 14:33:50 {stonelizard}[New.go]<New>(297): type=dawn/plugins/cluto/clutobot.ServiceT 2021/02/21 14:33:50 {stonelizard}[New.go]<New>(300): 0: CRLListenAddress 2021/02/21 14:33:50 {stonelizard}[New.go]<New>(300): 1: CertKit 2021/02/21 14:33:50 {stonelizard}[New.go]<New>(300): 2: GetConfig 2021/02/21 14:33:50 {stonelizard}[New.go]<New>(300): 3: GetHost 2021/02/21 14:33:50 {stonelizard}[New.go]<New>(300): 4: GetMasterConfig 2021/02/21 14:33:50 {stonelizard}[New.go]<New>(300): 5: HttpsClient 2021/02/21 14:33:50 {stonelizard}[New.go]<New>(300): 6: ListenAddress 2021/02/21 14:33:50 {stonelizard}[New.go]<New>(300): 7: PageNotFound 2021/02/21 14:33:50 {stonelizard}[New.go]<New>(300): 8: SavePending 2021/02/21 14:33:50 {stonelizard}[New.go]<New>(300): 9: Stop 2021/02/21 14:33:50 {stonelizard}[New.go]<New>(303): *|methods|=21 2021/02/21 14:33:50 {stonelizard}[New.go]<New>(304): *type=. 2021/02/21 14:33:50 {stonelizard}[New.go]<New>(307): 0: *CRLListenAddress 2021/02/21 14:33:50 {stonelizard}[New.go]<New>(307): 1: *CertKit 2021/02/21 14:33:50 {stonelizard}[New.go]<New>(307): 2: *GetConfig 2021/02/21 14:33:50 {stonelizard}[New.go]<New>(307): 3: *GetHost 2021/02/21 14:33:50 {stonelizard}[New.go]<New>(307): 4: *GetId 2021/02/21 14:33:50 {stonelizard}[New.go]<New>(307): 5: *GetMasterConfig 2021/02/21 14:33:50 {stonelizard}[New.go]<New>(307): 6: *GetRest 2021/02/21 14:33:50 {stonelizard}[New.go]<New>(307): 7: *HttpsClient 2021/02/21 14:33:50 {stonelizard}[New.go]<New>(307): 8: *InitConn 2021/02/21 14:33:50 {stonelizard}[New.go]<New>(307): 9: *ListenAddress 2021/02/21 14:33:50 {stonelizard}[New.go]<New>(307): 10: *LoadClientCert 2021/02/21 14:33:50 {stonelizard}[New.go]<New>(307): 11: *LoadConfig 2021/02/21 14:33:50 {stonelizard}[New.go]<New>(307): 12: *NewCK 2021/02/21 14:33:50 {stonelizard}[New.go]<New>(307): 13: *NewSshClientConfig 2021/02/21 14:33:50 {stonelizard}[New.go]<New>(307): 14: *PageNotFound 2021/02/21 14:33:50 {stonelizard}[New.go]<New>(307): 15: *PingAt 2021/02/21 14:33:50 {stonelizard}[New.go]<New>(307): 16: *SavePending 2021/02/21 14:33:50 {stonelizard}[New.go]<New>(307): 17: *SetRest 2021/02/21 14:33:50 {stonelizard}[New.go]<New>(307): 18: *Start 2021/02/21 14:33:50 {stonelizard}[New.go]<New>(307): 19: *Stop 2021/02/21 14:33:50 {stonelizard}[New.go]<New>(307): 20: *Version 2021/02/21 14:33:50 {stonelizard}[New.go]<New>(310): Method not found: VP_ClusterDirect, Data: &reflect.rtype{size:0x100, ptrdata:0x100, hash:0xcfbeab05, tflag:0x7, align:0x4, fieldAlign:0x4, kind:0x19, equal:(func(unsafe.Pointer, unsafe.Pointer) bool)(nil), gcdata:(*uint8)(0x86467d8), str:85076, ptrToThis:937664} ``` That seems to me that when I set GOARCH=386 it disables CGO, silently ignoring any code that references to C symbols. So, how can I statically link Go against a 32 bit (.a) library? -- Luis Otavio de Colla Furquim -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/golang-nuts/CACyQ4W7oh2NgcqCSM9y6dmt_%2BM-H2SW-JhNsUyaQHtRpUmL9iA%40mail.gmail.com.
