Update libc.c

Bluebear233 · web-flow · commit ad1d6600b844 · 2018-09-15T00:32:36.000+08:00
修复没有使用RT_USING_CONSOLE时，libc.c编译报错
diff --git a/components/libc/compilers/newlib/libc.c b/components/libc/compilers/newlib/libc.c
@@ -39,7 +39,7 @@ int	_EXFUN(putenv,(char *__string));
 
 int libc_system_init(void)
 {
-#if defined(RT_USING_DFS) & defined(RT_USING_DFS_DEVFS)
+#if defined(RT_USING_DFS) & defined(RT_USING_DFS_DEVFS) & defined(RT_USING_CONSOLE)
     rt_device_t dev_console;
 
     dev_console = rt_console_get_device();

Original file line number	Diff line number	Diff line change
`@@ -39,7 +39,7 @@ int _EXFUN(putenv,(char *__string));`
`39`	`39`
`40`	`40`	`int libc_system_init(void)`
`41`	`41`	`{`
`42`		`-#if defined(RT_USING_DFS) & defined(RT_USING_DFS_DEVFS)`
	`42`	`+#if defined(RT_USING_DFS) & defined(RT_USING_DFS_DEVFS) & defined(RT_USING_CONSOLE)`
`43`	`43`	`rt_device_t dev_console;`
`44`	`44`
`45`	`45`	`dev_console = rt_console_get_device();`