clang: error: linker command failed with exit code 1 (use -v to see invocation) MINIX3

[El Ban]

Using clang to compile an application on Minix3 and having a little bit of trouble.

I want to implement an interprocess communication by message passing and getting this error (my file is send.cpp):

send.cpp:(.text+0x7f): undefined reference to `msgget' send.cpp:(.text+0x1c1): undefined reference to `msgsnd' clang: error: linker command failed with exit code 1 (use -v to see invocation)

This is my send.cpp file:

#include <sys/types.h> #include <sys/msg.h> #include <stdio.h> #include <string.h> #include <stdlib.h> #include <chrono> #include <iostream> #define MSGSZ 128 using namespace std::chrono; /* * Declare the message structure. */ typedef struct msgbufer { long mtype; char mtext[MSGSZ]; } message_buf; int main() { int msqid; int msgflg = IPC_CREAT | 0666; key_t key; message_buf sbuf; size_t buf_length; /* * Get the message queue id for the * "name" 1234, which was created by * the server. */ key = 1234; (void) fprintf(stderr, "\nmsgget: Calling msgget(%i,\ %#o)\n", key, msgflg); if ((msqid = msgget(key, msgflg )) < 0) { perror("msgget"); exit(1); } else (void) fprintf(stderr,"msgget: msgget succeeded: msqid = %d\n", msqid); /* * We'll send message type 1 */ sbuf.mtype = 1; (void) strcpy(sbuf.mtext, "Hello other process 2."); buf_length = strlen(sbuf.mtext) + 1 ; /* * Send a message. */ high_resolution_clock::time_point t1 = high_resolution_clock::now(); int err = msgsnd(msqid, &sbuf, buf_length, IPC_NOWAIT); high_resolution_clock::time_point t2 = high_resolution_clock::now(); if (err < 0) { printf ("%d, %li, %s, %lu\n", msqid, sbuf.mtype, sbuf.mtext, buf_length); perror("msgsnd"); exit(1); } else printf("Message: \"%s\" Sent\n", sbuf.mtext); auto duration = duration_cast<nanoseconds>( t2 - t1 ).count(); std::cout << "Execution duration: " << duration << std::endl; exit(0); }

Any idea?