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-rwxr-xr-xtool/ifchange2
1 files changed, 2 insertions, 0 deletions
diff --git a/tool/ifchange b/tool/ifchange
index cc630b0c99..8571cf8049 100755
--- a/tool/ifchange
+++ b/tool/ifchange
@@ -1,6 +1,8 @@
#!/bin/sh
# usage: ifchange target temporary
+# Used in generating revision.h via Makefiles.
+
set -e
timestamp=
keepsuffix=