Sorry for following up to myself once more...

On Wed, 12 Jan 2005 at 19:36, Reinhard Max wrote:

> The problem is, that the heimdal implementation of kerberos5 used on 
> sles8 needs an extra include statement for com_err.h in 
> src/interfaces/libpq/fe-auth.c to get the prototype for 
> error_message(), while on newer SUSE-releases using the MIT 
> Kerberos5 implementation this prototype is provided by krb5.h 
> itself.

after finding and reading the thread on HACKERS about com_err.h from 
last December, I think either should configure check if including 
krb5.h is sufficient for getting the prototype of error_message(), or 
a conditional include for krb5.h should be added to 

A proposed patch to achieve the latter is attached to this mail.

Either way will lead to a build time error when error_message() isn't 
declared or com_err.h can't be found, which is better than the current 
situation where only a warning about a missing prototype is issued, 
but compilation continues resulting in a broken libpq.

--- src/interfaces/libpq/fe-auth.c
+++ src/interfaces/libpq/fe-auth.c
@@ -244,6 +244,11 @@
 #include <krb5.h>
+#if !defined(__COM_ERR_H) && !defined(__COM_ERR_H__)
+/* if krb5.h didn't include it already */
+#include <com_err.h>
  * pg_an_to_ln -- return the local name corresponding to an authentication
  *                               name
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