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-rw-r--r--user_call/Makefile.am2
1 files changed, 2 insertions, 0 deletions
diff --git a/user_call/Makefile.am b/user_call/Makefile.am
index d7b1fb8..361499d 100644
--- a/user_call/Makefile.am
+++ b/user_call/Makefile.am
@@ -25,3 +25,5 @@ rose_call_SOURCES = rose_call.c \
tcp_call_SOURCES = tcp_call.c \
user_io.c \
user_io.h
+
+AM_CPPFLAGS = -D_GNU_SOURCE