Add compat function for geteuid()

* configure.ac: Check for geteuid()
* src/util/util.h: Compat for geteuid()

configure.ac

@@ -120,7 +120,7 @@ AC_MSG_RESULT([$have_cpuid])
 dnl Availability of various common functions (non-fatal if missing),
 dnl and various less common threadsafe functions
 AC_CHECK_FUNCS_ONCE([cfmakeraw regexec sched_getaffinity getuid getgid \
- initgroups posix_fallocate mmap kill \
+ geteuid initgroups posix_fallocate mmap kill \
  getmntent_r getgrnam_r getpwuid_r])
 
 dnl Availability of pthread functions (if missing, win32 threading is

src/util/util.h

@@ -269,6 +269,10 @@ const char *virEnumToString(const char *const*types,
 static inline int getuid (void) { return 0; }
 # endif
 
+# ifndef HAVE_GETEUID
+static inline int geteuid (void) { return 0; }
+# endif
+
 # ifndef HAVE_GETGID
 static inline int getgid (void) { return 0; }
 # endif