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-rw-r--r--tools/iio/Makefile2
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/iio/Makefile b/tools/iio/Makefile
index 83813ad379f9..bf7ae6d6612a 100644
--- a/tools/iio/Makefile
+++ b/tools/iio/Makefile
@@ -1,5 +1,5 @@
CC = gcc
-CFLAGS = -Wall -g
+CFLAGS = -Wall -g -D_GNU_SOURCE
all: iio_event_monitor lsiio generic_buffer