From caff976a86659b8bd14d7f99e1dbf173cbcc47cc Mon Sep 17 00:00:00 2001
From: Christian Pointner <equinox@spreadspace.org>
Date: Tue, 14 Jun 2016 22:41:57 +0200
Subject: added option for printf with float support

---
 defines.mk          | 3 +++
 usb-bmp280/Makefile | 2 +-
 usb-led/Makefile    | 1 +
 3 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/defines.mk b/defines.mk
index fd57edd..be0703e 100644
--- a/defines.mk
+++ b/defines.mk
@@ -268,3 +268,6 @@ endif
 ## Linker flags
 LDFLAGS = -mmcu=$(MCU)
 LDFLAGS += -Wl,--gc-sections
+ifdef PRINTF_HAS_FLOAT
+LDFLAGS += -Wl,-u,vfprintf -lprintf_flt -lm
+endif
diff --git a/usb-bmp280/Makefile b/usb-bmp280/Makefile
index 5bfc049..d0c6322 100644
--- a/usb-bmp280/Makefile
+++ b/usb-bmp280/Makefile
@@ -27,6 +27,7 @@ OBJ := $(NAME).o
 LIBS := util led lufa-descriptor-usbserial usbio bmp280
 EXTERNAL_LIBS := lufa
 SPREADAVR_PATH := ..
+PRINTF_HAS_FLOAT := 1
 
 LUFA_PATH := $(SPREADAVR_PATH)/contrib/lufa-LUFA-151115
 LUFA_OPTS  = -D USB_DEVICE_ONLY
@@ -45,7 +46,6 @@ LUFA_COMPONENTS := USB USBCLASS
 
 include $(SPREADAVR_PATH)/include.mk
 
-LDFLAGS += -Wl,-u,vfprintf -lprintf_flt -lm
 AVRDUDE_PORT := $(shell $(SPREADAVR_PATH)/tools/detect_newest_acm)
 #AVRDUDE_PORT := $(shell $(SPREADAVR_PATH)/tools/detect_lufa_cdc 1)
 RESET_FUNC := $(SPREADAVR_PATH)/tools/reset_sparkfun
diff --git a/usb-led/Makefile b/usb-led/Makefile
index e0afd1e..d7d03ef 100644
--- a/usb-led/Makefile
+++ b/usb-led/Makefile
@@ -28,6 +28,7 @@ EXTERNAL_LIBS := lufa
 SPREADAVR_PATH := ..
 RESET_FUNC := $(SPREADAVR_PATH)/tools/reset_lufa_cdc
 RESET_PARAM := 'r'
+PRINTF_HAS_FLOAT := 1
 
 LUFA_PATH := $(SPREADAVR_PATH)/contrib/lufa-LUFA-151115
 LUFA_OPTS  = -D USB_DEVICE_ONLY
-- 
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