Disable floating point support when building using PIO

code/espurna/config/build.h

@@ -1,5 +0,0 @@
-// DO NOT EDIT THIS FILE MANUALLY
-// This file is modified by PlatformIO
-// This file should not be pushed when modified, untrack changes with:
-//  git update-index --assume-unchanged code/espurna/config/build.h
-#define APP_BUILD_FLAGS ""

code/extra_scripts.py

@@ -34,6 +34,18 @@ def clr(color, text):
 # Callbacks
 # ------------------------------------------------------------------------------
 
+def remove_float_support():
+
+    flags = " ".join(env['LINKFLAGS'])
+    print flags
+    flags = flags.replace("-u _printf_float", "")
+    flags = flags.replace("-u _scanf_float", "")
+    newflags = flags.split()
+
+    env.Replace(
+        LINKFLAGS = newflags
+    )
+
 def cpp_check(source, target, env):
     print("Started cppcheck...\n")
     call(["cppcheck", os.getcwd()+"/espurna", "--force", "--enable=all"])
@@ -63,6 +75,8 @@ def add_build_flags(source, target, env):
 # Hooks
 # ------------------------------------------------------------------------------
 
+remove_float_support()
+
 #env.AddPreAction("buildprog", cpp_check)
 env.AddPreAction("$BUILD_DIR/src/espurna.ino.o", add_build_flags)
 env.AddPostAction("$BUILD_DIR/${PROGNAME}.bin", check_size)