[mvapich-discuss] RE: mpirun_rsh: Unable to get host entry

[Mark Debbage]

Here's an example showing compiler options that break this idiom. For your
information, the MVAPICH2 binaries in stock RHEL 6.2 are compiled this way and
have this problem.

[markdebbage at rock 121450]$ cat sillysprintf.c
#include <stdio.h>
#include <string.h>

int main()
{
  char s[1000];
  strcpy(s, "hello");
  sprintf(s, "%s, world\n", s);
  printf(s);
}

[markdebbage at rock 121450]$ gcc -O3 -Wp,-D_FORTIFY_SOURCE=2 sillysprintf.c -o
sillysprintf
[markdebbage at rock 121450]$ ./sillysprintf
, world

[markdebbage at rock 121450]$ gcc sillysprintf.c -o sillysprintf

[markdebbage at rock 121450]$ ./sillysprintf
hello, world

Mark.

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