Squashed 'third_party/eigen/' content from commit 61d72f6

Change-Id: Iccc90fa0b55ab44037f018046d2fcffd90d9d025
git-subtree-dir: third_party/eigen
git-subtree-split: 61d72f6383cfa842868c53e30e087b0258177257
diff --git a/scripts/check.in b/scripts/check.in
new file mode 100755
index 0000000..a90061a
--- /dev/null
+++ b/scripts/check.in
@@ -0,0 +1,21 @@
+#!/bin/bash
+# check : shorthand for make and ctest -R
+
+if [[ $# != 1 || $1 == *help ]]
+then
+  echo "usage: ./check regexp"
+  echo "  Builds and runs tests matching the regexp."
+  echo "  The EIGEN_MAKE_ARGS environment variable allows to pass args to 'make'."
+  echo "    For example, to launch 5 concurrent builds, use EIGEN_MAKE_ARGS='-j5'"
+  echo "  The EIGEN_CTEST_ARGS environment variable allows to pass args to 'ctest'."
+  echo "    For example, with CTest 2.8, you can use EIGEN_CTEST_ARGS='-j5'."
+  exit 0
+fi
+
+if [ -n "${EIGEN_CTEST_ARGS:+x}" ]
+then
+  ./buildtests.sh "$1" && ctest -R "$1" ${EIGEN_CTEST_ARGS}
+else
+  ./buildtests.sh "$1" && ctest -R "$1"
+fi
+exit $?