* src/sanity/Makefile.am, src/sanity/includes.test: New files.

* src/Makefile.am (SUBDIRS): Add sanity.
* configure.ac: Output src/sanity/Makefile.in.

src/sanity/includes.test

@@ -0,0 +1,25 @@
+#! /bin/sh
+
+# Check that each header is self contained and generates no warning.
+
+set -e
+
+rm -f failures
+
+for file in `find "$INCDIR" -name "${1-*}.hh" -type f -print |
+             sed "s,$INCDIR/,,g"`; do
+   echo "#include <$file>" > incltest.cc
+   if $CXX $CPPFLAGS $CXXFLAGS -c incltest.cc; then
+      echo "PASS: $file"
+   else
+      echo "FAIL: $file"
+      echo "  $file" >> failures
+   fi
+done
+
+if test -f failures; then
+   echo "Failed files:"
+   cat failures
+   rm failures
+   exit 1;
+fi