iap 完善 & 浮点数printf 适配

Signed-off-by: a1012112796 <1012112796@qq.com>

packages/rt_vsnprintf_full-latest/SConscript

@@ -0,0 +1,14 @@
+from building import *
+
+src   = ['rt_vsnprintf.c']
+CPPDEFINES = []
+
+if GetDepend('RT_VSNPRINTF_FULL_REPLACING_SPRINTF'):
+    CPPDEFINES += ['sprintf=rt_sprintf']
+if GetDepend('RT_VSNPRINTF_FULL_REPLACING_SNPRINTF'):
+    CPPDEFINES += ['snprintf=rt_snprintf']
+if GetDepend('RT_VSNPRINTF_FULL_REPLACING_PRINTF'):
+    CPPDEFINES += ['printf=rt_kprintf']
+
+group = DefineGroup('rt_kprintf', src, depend = ['PKG_USING_RT_VSNPRINTF_FULL'], CPPDEFINES = CPPDEFINES)
+Return('group')