[Bug libc/17250] New: static linking breaks nss loading (getaddrinfo/getpwnam/etc...)

["vapier at gentoo dot org" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=17250

            Bug ID: 17250
           Summary: static linking breaks nss loading
                    (getaddrinfo/getpwnam/etc...)
           Product: glibc
           Version: 2.19
            Status: NEW
          Severity: normal
          Priority: P2
         Component: libc
          Assignee: unassigned at sourceware dot org
          Reporter: vapier at gentoo dot org
                CC: drepper.fsp at gmail dot com, macro@linux-mips.org

it looks like the change landed for bug 16046 broke static dlopening of nss
modules.  if you try to use getaddrinfo/getpwnam/etc..., they just return
errors immediately.

example tests:
$ cat test.c
#include <sys/types.h>
#include <pwd.h>
#include <stdio.h>
int main() {
    void *p = getpwnam("root");
    printf("%p\n", p);
    return p == NULL ? 1 : 0;
}

$ gcc test.c && ./a.out
0x7f6aec59a0e0
$ gcc -static test.c && ./a.out
(nil)

$ cat test.c
#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <netinet/in.h>
#include <net/if.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <netdb.h>
#include <string.h>

int main(int argc, char *argv[])
{
        const char *host = argv[1];
        int rc;
        struct addrinfo *result = NULL;
        struct addrinfo hint;

        memset(&hint, 0 , sizeof(hint));
        hint.ai_family = AF_INET;
        hint.ai_socktype = SOCK_STREAM;
        hint.ai_flags = AF_UNSPEC;
        rc = getaddrinfo(host, NULL, &hint, &result);
        if (rc || !result) {
                printf("bad address '%s'\n", host);
                return 1;
        } else
                return 0;
}

$ gcc test.c && ./a.out localhost
$ gcc -static test.c && ./a.out localhost
bad address 'localhost'

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