https://bugzilla.mindrot.org/show_bug.cgi?id=2259
Bug ID: 2259
Summary: Checking for external _res fails
Product: Portable OpenSSH
Version: 6.6p1
Hardware: Other
OS: Other
Status: NEW
Severity: minor
Priority: P5
Component: Build system
Assignee: [email protected]
Reporter: [email protected]
I'm not familiar enough with autoconf to edit the configure.ac file,
but...
The location in configure.ac is around line 3902
In the configure script, when it checks to see if _res is an extern,
there are two problems:
1. There is no ac_WHATEVER variable to control it and override it.
2. Because the extern reference to _res is unused, the linker on some
systems may elide it, causing an erroneous definition of
HAS__RES_EXTERN
The test should be coded in "configure" as follows:
/* ... confdefs.h */
#include <stdio.h>
#if HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#include <netinet/in.h>
#include <arpa/nameser.h>
#include <resolv.h>
extern struct __res_state _res;
int
main ()
{
struct __res_state *volatile p = &_res; /* force resolution of _res */
return 0; }
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