From 7fc32070431ac08677eaa30c2ab8aa52f48db221 Mon Sep 17 00:00:00 2001
From: Gilles DOFFE <g.doffe@gmail.com>
Date: Sun, 12 May 2019 10:19:40 +0200
Subject: [PATCH] sys: add pseudomodule scanf_float

To read float number from stdin, add "-u scanf_float"
option to the linker.
This option is setup using a pseudomodule as it is already done for
printf_float.
Just add to your Makefile:
USEMODULE += scanf_float

Signed-off-by: Gilles DOFFE <g.doffe@gmail.com>
---
 makefiles/pseudomodules.inc.mk | 1 +
 sys/Makefile.include           | 6 ++++++
 2 files changed, 7 insertions(+)

diff --git a/makefiles/pseudomodules.inc.mk b/makefiles/pseudomodules.inc.mk
index 3f0b799ed4..748647fe37 100644
--- a/makefiles/pseudomodules.inc.mk
+++ b/makefiles/pseudomodules.inc.mk
@@ -65,6 +65,7 @@ PSEUDOMODULES += saul_adc
 PSEUDOMODULES += saul_default
 PSEUDOMODULES += saul_gpio
 PSEUDOMODULES += saul_nrf_temperature
+PSEUDOMODULES += scanf_float
 PSEUDOMODULES += schedstatistics
 PSEUDOMODULES += sock
 PSEUDOMODULES += sock_ip
diff --git a/sys/Makefile.include b/sys/Makefile.include
index 1779637afa..a9ab8095ef 100644
--- a/sys/Makefile.include
+++ b/sys/Makefile.include
@@ -77,6 +77,12 @@ ifneq (,$(filter printf_float,$(USEMODULE)))
   endif
 endif
 
+ifneq (,$(filter scanf_float,$(USEMODULE)))
+  ifeq (1,$(USE_NANO_SPECS))
+    export LINKFLAGS += -u _scanf_float
+  endif
+endif
+
 ifneq (,$(filter riotboot,$(FEATURES_USED)))
   include $(RIOTBASE)/sys/riotboot/Makefile.include
 endif