Merge pull request #1069 from BernardXiong/master

 [BSP] Add qemu-nographic script

bsp/qemu-vexpress-a9/qemu-nographic.sh

+qemu-system-arm -M vexpress-a9 -kernel rtthread.elf -nographic

bsp/qemu-vexpress-a9/rtconfig.py

@@ -37,7 +37,7 @@ if PLATFORM == 'gcc':
     CFLAGS = DEVICE + ' -Wall'
     AFLAGS = ' -c' + DEVICE + ' -x assembler-with-cpp -D__ASSEMBLY__'
     LINK_SCRIPT = 'link.lds'
-    LFLAGS = DEVICE + ' -Wl,--gc-sections,-Map=rtthread.map,-cref,-u,system_vectors'+\
+    LFLAGS = DEVICE + ' -nostartfiles -Wl,--gc-sections,-Map=rtthread.map,-cref,-u,system_vectors'+\
                       ' -T %s' % LINK_SCRIPT
 
     CPATH = ''

tools/building.py

@@ -303,6 +303,11 @@ def PrepareBuilding(env, root_directory, has_libcpu=False, remove_components = [
             LINKCOMSTR = 'LINK $TARGET'
         )
 
+    # fix the linker for C++
+    if GetDepend('RT_USING_CPLUSPLUS'):
+        if env['LINK'].find('gcc') != -1:
+            env['LINK'] = env['LINK'].replace('gcc', 'g++')
+
     # we need to seperate the variant_dir for BSPs and the kernels. BSPs could
     # have their own components etc. If they point to the same folder, SCons
     # would find the wrong source code to compile.