Merge pull request #532 from pangweishen/master

[BSP]fix lslc compiling issue when using RT_USING_LIBC.

bsp/ls1cdev/ls1c_ram.lds

 /*
- * File      : ls1b_ram.lds
+ * File      : ls1c_ram.lds
  * This file is part of RT-Thread RTOS
  * COPYRIGHT (C) 2011, RT-Thread Development Team
  *
@@ -53,6 +53,13 @@ SECTIONS
           __rt_init_end = .;
          . = ALIGN(4);
     }
+    
+    .eh_frame_hdr : 
+    { 
+         *(.eh_frame_hdr) 
+         *(.eh_frame_entry)
+    }
+    .eh_frame : ONLY_IF_RO { KEEP (*(.eh_frame)) }
 
     . = ALIGN(4);
     .data : 

bsp/ls1cdev/rtconfig.h

@@ -93,7 +93,9 @@
 #define FINSH_THREAD_STACK_SIZE	4096
 // </section>
 
+
 // <section name="LIBC" description="C Runtime library setting" default="always" >
+#define RT_USING_LIBC
 // <bool name="RT_USING_NEWLIB" description="Using newlib library, only available under GNU GCC" default="true" />
 // #define RT_USING_NEWLIB
 // <bool name="RT_USING_PTHREADS" description="Using POSIX threads library" default="true" />