[headercheck]

print warnings, but continue compilation
(thanks to Tobias Malkmus)

[[Imported from SVN: r6853]]

COPYING

@@ -18,6 +18,7 @@ Copyright holders:
 2003--2012    Robert Klöfkorn
 2010--2011    Andreas Lauser
 2007--2011    Sven Marnach
+2012          Tobias Malkmus
 2010          Rene Milk
 2011--2012    Steffen Müthing
 2003--2006    Thimo Neubauer

am/headercheck

@@ -58,6 +58,12 @@ headercheck-am:
 	    echo "Error in $$HEADER"; \
             test $V -ne 1 && echo "run with V=1 to show details" || cat $$LOGFILE; \
 	  fi; \
+	  warnings=`grep 'warning' $$LOGFILE`; \
+	  FOUNDWARNINGS=$$?; \
+	  if ( test $$FOUNDWARNINGS -eq 0 && test -e $$OFILE ); then \
+	    echo "Warnings in $$HEADER"; \
+	    test $V -ne 1 && echo "run with V=1 to show details" || cat $$LOGFILE; \
+	  fi; \
 	  rm -f $$OFILE; \
 	  rm -f $$CCFILE; \
 	  rm -f $$LOGFILE; \