Add initial support for USB output communication

[libam7xxx.git] / Makefile

diff --git a/Makefile b/Makefile
index 20b44c4..ed57b89 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -42,6 +42,7 @@ bindir := $(PREFIX)/sbin
 all: picoproj
 
 CFLAGS += -D_BSD_SOURCE # for htole32()
+CFLAGS += -D_POSIX_C_SOURCE=2 # for getopt()
 
 picoproj: picoproj.o