Cannot find symbol in linked library - c++

Question

I'm trying to create go app, which uses some C++ code from sdk in shared library.
Added reference to target library with #cgo LDFLAGS:
#cgo LDFLAGS: -L/opt/cprocsp/lib/amd64 -lxades -v
and build go app with
go build -o main .
Compilation goes ok, but linking fails with error
/usr/bin/ld: $WORK/b001/_x003.o: undefined reference to symbol 'CryptReleaseContext'
/usr/bin/ld: //opt/cprocsp/lib/amd64/libcapi10.so.4: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status
Function CryptReleaseContext exists in /opt/cprocsp/lib/amd64/libxades.so.
With -v option I noticed linker arguments order
/usr/lib/gcc/x86_64-linux-gnu/8/collect2 ... $WORK/b001/_cgo_main.o $WORK/b001/_x001.o $WORK/b001/_x002.o $WORK/b001/_x003.o -lxades -lstdc++ ...
With Google I found that arguments order may be important, but I can't find a way to control them and stucking with it. How can I build app?
Example:
main.go
package main
import "log"
func main() {
data := "<?xml version=\"1.0\" encoding=\"UTF-8\"?>" +
"<Envelope xmlns=\"urn:envelope\">" +
"<Data>Hello, World!</Data>" +
"<Node xml:id=\"nodeID\">Hello, Node!</Node>" +
"</Envelope>"
signed := Sign(data)
log.Print(signed)
}
signer.go
package main
/*
#cgo LDFLAGS: -L/opt/cprocsp/lib/amd64 -lxades -v
#include <stdarg.h>
#include <stdlib.h>
#include "signer.h"
*/
import "C"
import "log"
import "unsafe"
func Sign(data string) (result string) {
log.Print("Signing message")
c_data := C.CString(data)
defer C.free(unsafe.Pointer(c_data))
c_result := C.CString(result)
defer C.free(unsafe.Pointer(c_result))
C.sign(c_data, c_result)
return C.GoString(c_result)
}
signer.h
void sign(char* src, char *dst);
signer.cpp
SDK's example code, that uses functions from /opt/cprocsp/lib/amd64/libxades.so
...
extern "C" {
void sign(char* src, char *dst){
BYTE *pbToBeSigned = (BYTE *) src;
DWORD cbToBeSigned = strlen(src);
static XADES_SIGN_MESSAGE_PARA signParams = { sizeof(signParams) };
initSignParams(&signParams);
PCRYPT_DATA_BLOB pSignedMessage = 0;
// Создаем подписанное сообщение
if (!XadesSign(&signParams, NULL, FALSE, pbToBeSigned, cbToBeSigned, &pSignedMessage)) {
cout << "XadesSign() failed" << endl;
return;
}
vector<unsigned char> message(pSignedMessage->cbData);
copy(pSignedMessage->pbData, pSignedMessage->pbData + pSignedMessage->cbData, message.begin());
char* result = reinterpret_cast<char*>(message.data());
strcpy(dst, result);
}
}
Update
#cgo LDFLAGS: -L/opt/cprocsp/lib/amd64 -Wl,-rpath,/opt/cprocsp/lib/amd64 -lxades -v
didn't help

Answer 1

answer was in second error:
#cgo LDFLAGS: -L/opt/cprocsp/lib/amd64 -lxades -lcapi10 -lcapi20 -v
first time when I'm trying to add lcapi10 - missed that new error tells about lcapi20, not 10