Merge pull request #475 from Eclo/Discovery4-fix-for-GCC5.4.1

Fix to build Discovery 4 using GCC 5.4.1

Author: smaillet-ms

Solutions/STM32F4DISCOVERY/STM32F4DISCOVERY.settings

@@ -16,6 +16,7 @@
     <IsSolutionWizardVisible>True</IsSolutionWizardVisible>
     <ENDIANNESS>le</ENDIANNESS>
     <NO_BOOTLOADER_COMPRESSION>true</NO_BOOTLOADER_COMPRESSION>
+    <PLATFORM_EMULATED_FLOATINGPOINT Condition="'$(COMPILER_TOOL)'=='GCC'">true</PLATFORM_EMULATED_FLOATINGPOINT>
   </PropertyGroup>
   <PropertyGroup>
     <!-- FIXME: Replaced with an appropriate value. -->

Solutions/STM32F4DISCOVERY/TinyBooter/TinyBooter.proj

@@ -23,6 +23,8 @@
         <ExtraTargets>$(ExtraTargets);CompressBin</ExtraTargets>
         <ScatterFileDefinition>scatterfile_bootloader_$(COMPILER_TOOL).$(SCATTER_EXT)</ScatterFileDefinition>
         <EXEScatterFileDefinition>scatterfile_bootloader_$(COMPILER_TOOL).$(SCATTER_EXT)</EXEScatterFileDefinition>
+        <!-- newlib-nano does not support long-long and long-double formatting, use standard newlib instead -->
+        <NewlibNano Condition="'$(COMPILER_TOOL)'=='GCC'">true</NewlibNano>  
     </PropertyGroup>
     <ItemGroup />
     <ItemGroup>

Solutions/STM32F4DISCOVERY/TinyCLR/TinyCLR.proj

@@ -31,7 +31,7 @@
         <CompressImageDatSym>TinyClr_Dat_Start</CompressImageDatSym>
         <CompressImageCfgSym>g_ConfigurationSector</CompressImageCfgSym>
         <!-- newlib-nano does not support long-long and long-double formatting, use standard newlib instead -->
-        <NewlibNano Condition="'$(COMPILER_TOOL)'=='GCC'">false</NewlibNano>
+        <NewlibNano Condition="'$(COMPILER_TOOL)'=='GCC'">true</NewlibNano>
     </PropertyGroup>
     <ItemGroup>
         <CompressImageSymdef Include="$(BIN_DIR)\$(AssemblyName).symdefs" />

Solutions/STM32F4DISCOVERY/TinyCLR/scatterfile_tinyclr_gcc.xml

@@ -89,7 +89,7 @@
             <FileMapping Name="*" Options="(.constdata*)" />
             <FileMapping Name="*" Options="(.conststring*)" />
             <FileMapping Name="*" Options="(.glue*)" />
-	    <FileMapping Name="*" Options="(tinyclr_metadata)" />
+	        <FileMapping Name="*" Options="(tinyclr_metadata)" />
             <Include File="%SPOCLIENT%\Solutions\STM32F4DISCOVERY\scatterfile_gcc_missing_symbols.xml"/>
         </ExecRegion>
 

Solutions/STM32F4DISCOVERY/scatterfile_gcc_missing_symbols.xml

@@ -1,5 +1,10 @@
 <?xml version="1.0" encoding="utf-8" ?>
 <ScatterFile xmlns="http://schemas.microsoft.com/netmf/ScatterfileSchema.xsd">
+  <!-- 
+    - using newlib-nano adds libnosys.a, which calls sbrk, which requires the 'end' symbol
+    - this is pulled in by a _printf imported in function _Crypto_StepRSAOperation @ Crypto.lib(rsa_zenith.obj) 
+  -->
+  <Provide Name="end" />
   <!-- libc thinks that it needs these routines, but they are never called -->
   <Provide Name="_sbrk" />
   <Provide Name="_write" />

tools/Targets/Microsoft.Spot.system.gcc.targets

@@ -52,7 +52,7 @@
     <CC_CPP_TARGETTYPE_FLAGS Condition="'$(FLAVOR)'=='Instrumented'" >$(CC_CPP_TARGETTYPE_FLAGS) -O0</CC_CPP_TARGETTYPE_FLAGS>
     <CC_CPP_TARGETTYPE_FLAGS Condition="'$(FLAVOR)'=='Release'"      >$(CC_CPP_TARGETTYPE_FLAGS) -Os</CC_CPP_TARGETTYPE_FLAGS>
 
-    <CC_FLAGS>$(CC_FLAGS)-xc</CC_FLAGS>
+    <CC_FLAGS>$(CC_FLAGS)-std=c11 -xc</CC_FLAGS>
 
     <ARCH_TARGETTYPE_FLAGS Condition="'$(FLAVOR)'=='RTM'"          >-O3</ARCH_TARGETTYPE_FLAGS>
     <ARCH_TARGETTYPE_FLAGS Condition="'$(FLAVOR)'=='Debug'"        >-Og -femit-class-debug-always -g3 -ggdb</ARCH_TARGETTYPE_FLAGS>
@@ -67,7 +67,7 @@
     NETMF already builds under two other compilers, so warnings from
     yet another compiler aren't really that valuable anyway.
     -->
-    <CPP_FLAGS>$(CPP_FLAGS)-xc++ -w -fcheck-new -fabi-version=0 -fno-exceptions -fno-rtti -fno-use-cxa-atexit -fno-threadsafe-statics </CPP_FLAGS>
+    <CPP_FLAGS>$(CPP_FLAGS)-std=c++11 -xc++ -w -fcheck-new -fabi-version=0 -fno-exceptions -fno-rtti -fno-use-cxa-atexit -fno-threadsafe-statics </CPP_FLAGS>
 
     <FLOATING_POINT_FLAG Condition="('$(PLATFORM_EMULATED_FLOATINGPOINT)'!='true' and '$(DEVICE_TYPE)' == 'cortex-m4') or '$(INSTRUCTION_SET)'=='thumb2fp'">-mfloat-abi=hard -mfpu=fpv4-sp-d16</FLOATING_POINT_FLAG>
     <FLOATING_POINT_FLAG Condition="'$(PLATFORM_EMULATED_FLOATINGPOINT)'=='true'">-mfloat-abi=softfp -mfpu=fpv4-sp-d16</FLOATING_POINT_FLAG>