docs: update command to get compiler specs in a few more places

docs/en/get-started/eclipse-setup-windows.rst

@@ -57,7 +57,7 @@ Project Properties
 
   * Click the "Providers" tab
 
-    * In the list of providers, click "CDT Cross GCC Built-in Compiler Settings". Change "Command to get compiler specs" to ``xtensa-esp32-elf-gcc ${FLAGS} -E -P -v -dD "${INPUTS}"``.
+    * In the list of providers, click "CDT Cross GCC Built-in Compiler Settings". Change "Command to get compiler specs" to ``xtensa-esp32-elf-gcc ${FLAGS} -std=c++11 -E -P -v -dD "${INPUTS}"``.
 
      * In the list of providers, click "CDT GCC Build Output Parser" and change the "Compiler command pattern" to ``xtensa-esp32-elf-(gcc|g\+\+|c\+\+|cc|cpp|clang)``
 

docs/zh_CN/get-started/eclipse-setup-windows.rst

@@ -59,7 +59,7 @@ Windows 平台上的 Eclipse 配置
 
 	* 点击 “Providers” 选项卡。
 	
-		* 从 “Providers” 列表中选择 “CDT Cross GCC Built-in Compiler Settings”，将 “Command to get compiler specs” 修改为 ``xtensa-esp32-elf-gcc ${FLAGS} -E -P -v -dD "${INPUTS}"``
+		* 从 “Providers” 列表中选择 “CDT Cross GCC Built-in Compiler Settings”，将 “Command to get compiler specs” 修改为 ``xtensa-esp32-elf-gcc ${FLAGS}  -std=c++11 -E -P -v -dD "${INPUTS}"``
 		
 		* 从 “Providers” 列表中选择 “CDT GCC Build Output Parser”，将 “Compiler command pattern” 修改为 ``xtensa-esp32-elf-(gcc|g\+\+|c\+\+|cc|cpp|clang)``
 

docs/zh_CN/get-started/eclipse-setup.rst

@@ -59,7 +59,7 @@ Windows 用户
 
 	* 点击 “Providers” 选项卡。
 	
-		* 从 “Providers” 列表中选择 “CDT Cross GCC Built-in Compiler Settings”，将 “Command to get compiler specs” 修改为 ``xtensa-esp32-elf-gcc ${FLAGS} -E -P -v -dD "${INPUTS}"``
+		* 从 “Providers” 列表中选择 “CDT Cross GCC Built-in Compiler Settings”，将 “Command to get compiler specs” 修改为 ``xtensa-esp32-elf-gcc ${FLAGS} -std=c++11 -E -P -v -dD "${INPUTS}"``
 		
 		* 从 “Providers” 列表中选择 “CDT GCC Build Output Parser”，将 “Compiler command pattern” 修改为 ``xtensa-esp32-elf-(gcc|g\+\+|c\+\+|cc|cpp|clang)``