visomat-data-downloader: improve wording in a comment

[visomat-utils.git] / src / Makefile

diff --git a/src/Makefile b/src/Makefile
index c39f955..79105ea 100644 (file)
--- a/src/Makefile
+++ b/src/Makefile
@@ -32,6 +32,13 @@ ifneq ($(CC),clang)
   CFLAGS += -Wunsafe-loop-optimizations -Wunused-but-set-variable
 endif
 
+ifeq ($(DEBUG),1)
+  CFLAGS += -DDEBUG
+endif
+
+# for getopt
+CFLAGS += -D_POSIX_C_SOURCE=2
+
 CFLAGS += $(shell pkg-config --cflags libusb-1.0)
 LDLIBS := $(shell pkg-config --libs libusb-1.0)