Find ucd-snmp include files more intelligently

diff --git a/ext/snmp/config.m4 b/ext/snmp/config.m4
index 342ff135321a12ee866b21e2e110f51395ef0262..eab29759748a65d0d4cdf26fadd59ffabb9e8786 100644 (file)
--- a/ext/snmp/config.m4
+++ b/ext/snmp/config.m4
@@ -25,9 +25,10 @@ AC_ARG_WITH(snmp,
     if test "$withval" = "yes"; then
       SNMP_INCDIR=/usr/local/include
       SNMP_LIBDIR=/usr/local/lib
-      test -d /usr/local/include/ucd-snmp && SNMP_INCDIR=/usr/local/include/ucd-snmp
-         test -d /usr/include/ucd-snmp && SNMP_INCDIR=/usr/include/ucd-snmp
-         test -d /usr/include/snmp && SNMP_INCDIR=/usr/include/snmp
+      test -f /usr/local/include/ucd-snmp/snmp.h && SNMP_INCDIR=/usr/local/include/ucd-snmp
+         test -f /usr/include/ucd-snmp/snmp.h && SNMP_INCDIR=/usr/include/ucd-snmp
+         test -f /usr/include/snmp/snmp.h && SNMP_INCDIR=/usr/include/snmp
+         test -f /usr/include/snmp/include/ucd-snmp/snmp.h && SNMP_INCDIR=/usr/include/snmp/include/ucd-snmp
          test -f /usr/lib/libsnmp.a && SNMP_LIBDIR=/usr/lib
          test -f /usr/lib/libsnmp.so && SNMP_LIBDIR=/usr/lib
     else