Index: net-snmp-config.in
===================================================================
--- net-snmp-config.in.orig
+++ net-snmp-config.in
@@ -27,6 +27,14 @@ check_build_dir()
       fi
 }
 
+check_devel_files()
+{
+    if [ ! -e "${NSC_INCDIR}/net-snmp/net-snmp-config.h" ] ; then
+        echo "Can not find \"${NSC_INCDIR}/net-snmp/net-snmp-config.h\". The net-snmp development files seems to be missing. Exiting" >&2
+       # exit 2
+    fi
+}
+
 prefix=@prefix@
 exec_prefix=@exec_prefix@
 includedir=@includedir@
@@ -104,9 +112,11 @@ else
       ;;
     #################################################### compile
     --base-cflags)
+      check_devel_files
       echo @CFLAGS@ @CPPFLAGS@ -I${NSC_INCLUDEDIR}
       ;;
     --cflags|--cf*)
+      check_devel_files
       echo @CFLAGS@ @DEVFLAGS@ @CPPFLAGS@ -I. -I${NSC_INCLUDEDIR}
       ;;
     --srcdir)
@@ -117,6 +127,7 @@ else
       echo $NSC_LIBDIR
       ;;
     --ldflags|--ld*)
+      check_devel_files
       echo $NSC_LDFLAGS
       ;;
     --build-lib-dirs)
@@ -150,30 +161,38 @@ else
       ;;
     #################################################### client lib
     --libs)
+      check_devel_files
       # use this one == --netsnmp-libs + --external-libs
       echo $NSC_LDFLAGS $NSC_LIBDIR -lnetsnmp $NSC_LIBS
       ;;
     --netsnmp-libs)
+      check_devel_files
       echo $NSC_LIBDIR -lnetsnmp
       ;;
     --external-libs)
+      check_devel_files
       echo $NSC_LDFLAGS $NSC_LIBS
       ;;
     #################################################### agent lib
     --base-agent-libs)
+      check_devel_files
       echo $NSC_BASE_AGENT_LIBS
       ;;
     --base-subagent-libs)
+      check_devel_files
       echo $NSC_BASE_SUBAGENT_LIBS
       ;;
     --agent-libs)
+      check_devel_files
       # use this one == --netsnmp-agent-libs + --external-libs
       echo $NSC_LDFLAGS $NSC_LIBDIR $NSC_BASE_AGENT_LIBS $NSC_AGENTLIBS
       ;;
     --netsnmp-agent-libs)
+      check_devel_files
       echo $NSC_LIBDIR $NSC_BASE_AGENT_LIBS
       ;;
     --external-agent-libs)
+      check_devel_files
       echo $NSC_LDFLAGS $NSC_AGENTLIBS
       ;;
     ####################################################
@@ -314,6 +333,7 @@ else
 
     ####################################################
     --compile-subagent)
+      check_devel_files
       shift
       while test "x$done" = "x" -a "x$1" != "x" ; do
 	case $1 in