File net-snmp-5.9.4-net-snmp-config-headercheck.patch of Package net-snmp

diff -Nurp net-snmp-5.8-orig/net-snmp-config.in net-snmp-5.8/net-snmp-config.in
--- net-snmp-5.8-orig/net-snmp-config.in	2018-10-10 09:45:14.947075442 +0000
+++ net-snmp-5.8/net-snmp-config.in	2018-10-10 09:48:04.792631474 +0000
@@ -41,6 +41,14 @@ count()
     echo $#
 }
 
+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@
@@ -140,9 +148,11 @@ 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)
@@ -153,6 +163,7 @@ else
       echo $NSC_LIBDIR
       ;;
     --ldflags|--ld*)
+      check_devel_files
       echo $NSC_LDFLAGS
       ;;
     --build-lib-dirs)
@@ -190,29 +201,37 @@ else
     #################################################### client lib
     --libs)
       # use this one == --netsnmp-libs + --external-libs
+      check_devel_files
       echo $NSC_LDFLAGS $NSC_LIBDIR $NSC_SNMPLIBS $NSC_LIBS
       ;;
     --netsnmp-libs)
+      check_devel_files
       echo $NSC_LIBDIR $NSC_BASE_SNMP_LIBS
       ;;
     --external-libs)
+      check_devel_files
       echo $NSC_LDFLAGS $NSC_LNETSNMPLIBS $NSC_LIBS @PERLLDOPTS_FOR_APPS@
       ;;
     #################################################### 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)
       # use this one == --netsnmp-agent-libs + --external-libs
+      check_devel_files
       echo $NSC_LDFLAGS $NSC_LIBDIR $NSC_AGENTLIBS $NSC_LIBS
       ;;
     --netsnmp-agent-libs)
+      check_devel_files
       echo $NSC_LIBDIR $NSC_BASE_AGENT_LIBS
       ;;
     --external-agent-libs)
+      check_devel_files
       echo $NSC_LDFLAGS $NSC_LMIBLIBS $NSC_LAGENTLIBS $NSC_LNETSNMPLIBS $NSC_LIBS
       ;;
     ####################################################
@@ -238,6 +257,7 @@ else
 
     ####################################################
     --compile-subagent)
+      check_devel_files
       shift
       shifted=1
       while test "x$done" = "x" -a "x$1" != "x" ; do