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-rw-r--r--lib/closeout.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/lib/closeout.c b/lib/closeout.c
index 14aa1d362..06ae79cd3 100644
--- a/lib/closeout.c
+++ b/lib/closeout.c
@@ -39,6 +39,13 @@
# include "unlocked-io.h"
#endif
+/* If EBADF is not defined then the code below can't possibly work --
+ we'll need to know what value errno is set to when fclose fails to
+ close an already-closed stream. Ask the user to report it. */
+#ifndef EBADF
+# error "EBADF is not defined: please report this to bug-gnulib@gnu.org"
+#endif
+
static const char *file_name;
/* Set the file name to be reported in the event an error is detected