This simple program, simple.c, taken from http://www.yolinux.com/TUTORIALS/LinuxTutorialPosixThreads.html #include <stdio.h> #include <stdlib.h> #include <pthread.h> void *print_message_function( void *ptr ); main() { pthread_t thread1, thread2; char *message1 = "Thread 1"; char *message2 = "Thread 2"; int iret1, iret2; /* Create independent threads each of which will execute function */ iret1 = pthread_create( &thread1, NULL, print_message_function, (void*) message1); iret2 = pthread_create( &thread2, NULL, print_message_function, (void*) message2); /* Wait till threads are complete before main continues. Unless we */ /* wait we run the risk of executing an exit which will terminate */ /* the process and all threads before the threads have completed. */ pthread_join( thread1, NULL); pthread_join( thread2, NULL); printf("Thread 1 returns: %d\n",iret1); printf("Thread 2 returns: %d\n",iret2); exit(0); } void *print_message_function( void *ptr ) { char *message; message = (char *) ptr; printf("%s \n", message); } Compiled with gcc -lpthread simple.c results in Thread 1 Thread 2 Thread 1 returns: 0 Thread 2 returns: 0 The sample program compiled with g++ -lpthread simple.c -L/home/users/tovrea/local/sgi6/lib/gcc/mips-sgi-irix6.5/4.4.0 -L/home/users/tovrea/local/sgi6/lib/gcc/mips-sgi-irix6.5/4.4.0/32 -L/home/users/tovrea/local/sgi6/lib/gcc/mips-sgi-irix6.5/lib32 -L/home/users/tovrea/local/sgi6/lib results in a core with backtrace tovrea@warhol%dbx a.out core dbx version 7.3.5 (92898_Aug07 MR) Aug 7 2003 14:15:31 Core from signal SIGSEGV: Segmentation violation (dbx) t > 0 pthread_key_create(0x600ed060, 0x6009ed20, 0x18248, 0x0, 0x0, 0x0, 0x65, 0x6009ef90) ["/xlv51/patches/7042/work/eoe/lib/libpthread/libpthread_n32_M3/key.c":68, 0xc058730] 1 <Unknown>(__initialize_p = <illegal>, __priority = <illegal>) ["/home/users/tovrea/GCC_SGI6/gcc-4.4.0/libstdc++-v3/libsupc++/eh_globals.cc":1, 0x6009ef88] 2 <Unknown>(__initialize_p = <illegal>, __priority = <illegal>) ["/home/users/tovrea/GCC_SGI6/gcc-4.4.0/libstdc++-v3/libsupc++/eh_globals.cc":1, 0x6009ef88] 3 <Unknown>(__initialize_p = <illegal>, __priority = <illegal>) ["/home/users/tovrea/GCC_SGI6/gcc-4.4.0/libstdc++-v3/libsupc++/eh_globals.cc":1, 0x6009ef88] -----Original Message----- From: gcc-help-owner@xxxxxxxxxxx [mailto:gcc-help-owner@xxxxxxxxxxx] On Behalf Of Tovrea, George W (US SSA) Sent: Tuesday, September 22, 2009 7:36 AM To: gcc-help@xxxxxxxxxxx Subject: GCC 4.4.0, mips-sgi-irix6.5 and pthread I would greatly appreciate if anyone working with gcc 4.4.0 on mips-sgi-irix6.5 and pthreads would contact me ASAP (deadlines, deadlines, deadlilnes). I am having issues with pthread initialization (just including -lpthread in a simple program that does not use them). I have tried both binutils ld v2.19 and the native loader /usr/bin/ld v7.41. Neither work. Thanks in advance, Bill Tovrea BAE Systems 16550 West Bernardo Drive San Diego, CA 92127 Telephone: (858) 592-5292 Pager: (888) 971-4964 E-mail: George.Tovrea@xxxxxxxxxxxxxx
