From ea8509717e1ed0b8ef4bcad9874873030eee552a Mon Sep 17 00:00:00 2001
From: tyustli <1225613647@qq.com>
Date: Tue, 26 Mar 2019 15:41:06 +0800
Subject: [PATCH] delete C++ support for gcc in the rtconfig.py file

---
 bsp/es32f0334/rtconfig.py                           | 2 +-
 bsp/es32f0654/rtconfig.py                           | 2 +-
 bsp/gd32303e-eval/rtconfig.py                       | 2 +-
 bsp/gd32450z-eval/rtconfig.py                       | 2 +-
 bsp/imxrt/imxrt1021-evk/rtconfig.py                 | 2 +-
 bsp/imxrt/imxrt1050-ArchMix/rtconfig.py             | 2 +-
 bsp/imxrt/imxrt1050-evk/rtconfig.py                 | 2 +-
 bsp/stm32/libraries/templates/stm32f0xx/rtconfig.py | 1 -
 bsp/stm32/libraries/templates/stm32f10x/rtconfig.py | 1 -
 bsp/stm32/libraries/templates/stm32f4xx/rtconfig.py | 1 -
 bsp/stm32/libraries/templates/stm32f7xx/rtconfig.py | 1 -
 bsp/stm32/libraries/templates/stm32l4xx/rtconfig.py | 1 -
 bsp/stm32/stm32f091-st-nucleo/rtconfig.py           | 1 -
 bsp/stm32/stm32f103-atk-nano/rtconfig.py            | 1 -
 bsp/stm32/stm32f103-atk-warshipv3/rtconfig.py       | 1 -
 bsp/stm32/stm32f103-dofly-lyc8/rtconfig.py          | 1 -
 bsp/stm32/stm32f103-fire-arbitrary/rtconfig.py      | 1 -
 bsp/stm32/stm32f103-hw100k-ibox/rtconfig.py         | 1 -
 bsp/stm32/stm32f103-mini-system/rtconfig.py         | 1 -
 bsp/stm32/stm32f107-uc-eval/rtconfig.py             | 1 -
 bsp/stm32/stm32f401-st-nucleo/rtconfig.py           | 1 -
 bsp/stm32/stm32f405-smdz-breadfruit/rtconfig.py     | 1 -
 bsp/stm32/stm32f407-atk-explorer/rtconfig.py        | 1 -
 bsp/stm32/stm32f407-st-discovery/rtconfig.py        | 1 -
 bsp/stm32/stm32f411-st-nucleo/rtconfig.py           | 1 -
 bsp/stm32/stm32f429-armfly-v6/rtconfig.py           | 1 -
 bsp/stm32/stm32f429-atk-apollo/rtconfig.py          | 1 -
 bsp/stm32/stm32f429-fire-challenger/rtconfig.py     | 1 -
 bsp/stm32/stm32f446-st-nucleo/rtconfig.py           | 1 -
 bsp/stm32/stm32f746-st-disco/rtconfig.py            | 1 -
 bsp/stm32/stm32f767-atk-apollo/rtconfig.py          | 1 -
 bsp/stm32/stm32f767-fire-challenger/rtconfig.py     | 1 -
 bsp/stm32/stm32f767-st-nucleo/rtconfig.py           | 1 -
 bsp/stm32/stm32g071-st-nucleo/rtconfig.py           | 1 -
 bsp/stm32/stm32l053-st-nucleo/rtconfig.py           | 1 -
 bsp/stm32/stm32l432-st-nucleo/rtconfig.py           | 1 -
 bsp/stm32/stm32l475-atk-pandora/rtconfig.py         | 1 -
 bsp/stm32/stm32l475-st-discovery/rtconfig.py        | 1 -
 bsp/stm32/stm32l476-st-nucleo/rtconfig.py           | 1 -
 bsp/stm32/stm32l496-ali-developer/rtconfig.py       | 1 -
 bsp/stm32f4xx-HAL/rtconfig.py                       | 2 +-
 bsp/swm320-lq100/rtconfig.py                        | 2 +-
 bsp/tm4c129x/rtconfig.py                            | 2 +-
 43 files changed, 10 insertions(+), 43 deletions(-)

diff --git a/bsp/es32f0334/rtconfig.py b/bsp/es32f0334/rtconfig.py
index f8be824456..170bae8a7b 100644
--- a/bsp/es32f0334/rtconfig.py
+++ b/bsp/es32f0334/rtconfig.py
@@ -44,7 +44,7 @@ if PLATFORM == 'gcc':
     OBJDUMP = PREFIX + 'objdump'
     OBJCPY = PREFIX + 'objcopy'
     DEVICE = ' -mcpu=' + CPU + ' -mthumb -ffunction-sections -fdata-sections'
-    CFLAGS = DEVICE + ' -std=c99'
+    CFLAGS = DEVICE
     AFLAGS = ' -c' + DEVICE + ' -x assembler-with-cpp -Wa,-mimplicit-it=thumb'
     LFLAGS = DEVICE + ' -Wl,--gc-sections,-Map=rtthread.map,-cref,-u,Reset_Handler -T board/linker_scripts/link.lds'
 
diff --git a/bsp/es32f0654/rtconfig.py b/bsp/es32f0654/rtconfig.py
index f8be824456..170bae8a7b 100644
--- a/bsp/es32f0654/rtconfig.py
+++ b/bsp/es32f0654/rtconfig.py
@@ -44,7 +44,7 @@ if PLATFORM == 'gcc':
     OBJDUMP = PREFIX + 'objdump'
     OBJCPY = PREFIX + 'objcopy'
     DEVICE = ' -mcpu=' + CPU + ' -mthumb -ffunction-sections -fdata-sections'
-    CFLAGS = DEVICE + ' -std=c99'
+    CFLAGS = DEVICE
     AFLAGS = ' -c' + DEVICE + ' -x assembler-with-cpp -Wa,-mimplicit-it=thumb'
     LFLAGS = DEVICE + ' -Wl,--gc-sections,-Map=rtthread.map,-cref,-u,Reset_Handler -T board/linker_scripts/link.lds'
 
diff --git a/bsp/gd32303e-eval/rtconfig.py b/bsp/gd32303e-eval/rtconfig.py
index d820325bee..c631bc3e44 100644
--- a/bsp/gd32303e-eval/rtconfig.py
+++ b/bsp/gd32303e-eval/rtconfig.py
@@ -38,7 +38,7 @@ if PLATFORM == 'gcc':
     OBJCPY = PREFIX + 'objcopy'
 	
     DEVICE = ' -mcpu=cortex-m4 -mthumb -ffunction-sections -fdata-sections'
-    CFLAGS = DEVICE + ' -std=c99 -Dgcc' # -D' + PART_TYPE
+    CFLAGS = DEVICE + ' -Dgcc' # -D' + PART_TYPE
     AFLAGS = ' -c' + DEVICE + ' -x assembler-with-cpp -Wa,-mimplicit-it=thumb '
     LFLAGS = DEVICE + ' -Wl,--gc-sections,-Map=rtthread-gd32.map,-cref,-u,Reset_Handler -T gd32_rom.ld'
 
diff --git a/bsp/gd32450z-eval/rtconfig.py b/bsp/gd32450z-eval/rtconfig.py
index 4581630b0f..f137cf5a65 100644
--- a/bsp/gd32450z-eval/rtconfig.py
+++ b/bsp/gd32450z-eval/rtconfig.py
@@ -39,7 +39,7 @@ if PLATFORM == 'gcc':
     OBJCPY = PREFIX + 'objcopy'
 	
     DEVICE = ' -mcpu=cortex-m4 -mthumb -mfpu=fpv4-sp-d16 -mfloat-abi=hard -ffunction-sections -fdata-sections'
-    CFLAGS = DEVICE + ' -std=c99 -Dgcc' # -D' + PART_TYPE
+    CFLAGS = DEVICE + ' -Dgcc' # -D' + PART_TYPE
     AFLAGS = ' -c' + DEVICE + ' -x assembler-with-cpp -Wa,-mimplicit-it=thumb '
     LFLAGS = DEVICE + ' -Wl,--gc-sections,-Map=rtthread-gd32.map,-cref,-u,Reset_Handler -T gd32_rom.ld'
 
diff --git a/bsp/imxrt/imxrt1021-evk/rtconfig.py b/bsp/imxrt/imxrt1021-evk/rtconfig.py
index b236dd652d..f5a31f5463 100644
--- a/bsp/imxrt/imxrt1021-evk/rtconfig.py
+++ b/bsp/imxrt/imxrt1021-evk/rtconfig.py
@@ -41,7 +41,7 @@ if PLATFORM == 'gcc':
     STRIP = PREFIX + 'strip'
 
     DEVICE = ' -mcpu=cortex-m7 -mthumb -mfpu=fpv4-sp-d16 -mfloat-abi=hard -ffunction-sections -fdata-sections'
-    CFLAGS = DEVICE + ' -std=c99 -Wall -D__FPU_PRESENT -eentry'
+    CFLAGS = DEVICE + ' -Wall -D__FPU_PRESENT -eentry'
     AFLAGS = ' -c' + DEVICE + ' -x assembler-with-cpp -Wa,-mimplicit-it=thumb -D__START=entry'
     LFLAGS = DEVICE + ' -lm -lgcc -lc' + ' -nostartfiles -Wl,--gc-sections,-Map=rtthread.map,-cref,-u,Reset_Handler -T flexspi_nor.ld'
 
diff --git a/bsp/imxrt/imxrt1050-ArchMix/rtconfig.py b/bsp/imxrt/imxrt1050-ArchMix/rtconfig.py
index 1b4257884f..c2ce83e8c3 100644
--- a/bsp/imxrt/imxrt1050-ArchMix/rtconfig.py
+++ b/bsp/imxrt/imxrt1050-ArchMix/rtconfig.py
@@ -41,7 +41,7 @@ if PLATFORM == 'gcc':
     STRIP = PREFIX + 'strip'
 
     DEVICE = ' -mcpu=cortex-m7 -mthumb -mfpu=fpv4-sp-d16 -mfloat-abi=hard -ffunction-sections -fdata-sections'
-    CFLAGS = DEVICE + ' -std=c99 -Wall -D__FPU_PRESENT -eentry'
+    CFLAGS = DEVICE + ' -Wall -D__FPU_PRESENT -eentry'
     AFLAGS = ' -c' + DEVICE + ' -x assembler-with-cpp -Wa,-mimplicit-it=thumb -D__START=entry'
     LFLAGS = DEVICE + ' -lm -lgcc -lc' + ' -nostartfiles -Wl,--gc-sections,-Map=rtthread-imxrt-gcc.map,-cref,-u,Reset_Handler -T flexspi_nor.ld'
 
diff --git a/bsp/imxrt/imxrt1050-evk/rtconfig.py b/bsp/imxrt/imxrt1050-evk/rtconfig.py
index 1b4257884f..c2ce83e8c3 100644
--- a/bsp/imxrt/imxrt1050-evk/rtconfig.py
+++ b/bsp/imxrt/imxrt1050-evk/rtconfig.py
@@ -41,7 +41,7 @@ if PLATFORM == 'gcc':
     STRIP = PREFIX + 'strip'
 
     DEVICE = ' -mcpu=cortex-m7 -mthumb -mfpu=fpv4-sp-d16 -mfloat-abi=hard -ffunction-sections -fdata-sections'
-    CFLAGS = DEVICE + ' -std=c99 -Wall -D__FPU_PRESENT -eentry'
+    CFLAGS = DEVICE + ' -Wall -D__FPU_PRESENT -eentry'
     AFLAGS = ' -c' + DEVICE + ' -x assembler-with-cpp -Wa,-mimplicit-it=thumb -D__START=entry'
     LFLAGS = DEVICE + ' -lm -lgcc -lc' + ' -nostartfiles -Wl,--gc-sections,-Map=rtthread-imxrt-gcc.map,-cref,-u,Reset_Handler -T flexspi_nor.ld'
 
diff --git a/bsp/stm32/libraries/templates/stm32f0xx/rtconfig.py b/bsp/stm32/libraries/templates/stm32f0xx/rtconfig.py
index 3c8992f7d0..bbc6a35774 100644
--- a/bsp/stm32/libraries/templates/stm32f0xx/rtconfig.py
+++ b/bsp/stm32/libraries/templates/stm32f0xx/rtconfig.py
@@ -58,7 +58,6 @@ if PLATFORM == 'gcc':
         CFLAGS += ' -O2'
 
     CXXFLAGS = CFLAGS 
-    CFLAGS += ' -std=c99'
 
     POST_ACTION = OBJCPY + ' -O binary $TARGET rtthread.bin\n' + SIZE + ' $TARGET \n'
 
diff --git a/bsp/stm32/libraries/templates/stm32f10x/rtconfig.py b/bsp/stm32/libraries/templates/stm32f10x/rtconfig.py
index c6d16622da..fa46b74340 100644
--- a/bsp/stm32/libraries/templates/stm32f10x/rtconfig.py
+++ b/bsp/stm32/libraries/templates/stm32f10x/rtconfig.py
@@ -58,7 +58,6 @@ if PLATFORM == 'gcc':
         CFLAGS += ' -O2'
 
     CXXFLAGS = CFLAGS 
-    CFLAGS += ' -std=c99'
 
     POST_ACTION = OBJCPY + ' -O binary $TARGET rtthread.bin\n' + SIZE + ' $TARGET \n'
 
diff --git a/bsp/stm32/libraries/templates/stm32f4xx/rtconfig.py b/bsp/stm32/libraries/templates/stm32f4xx/rtconfig.py
index 4a9fe33cef..638f59502a 100644
--- a/bsp/stm32/libraries/templates/stm32f4xx/rtconfig.py
+++ b/bsp/stm32/libraries/templates/stm32f4xx/rtconfig.py
@@ -58,7 +58,6 @@ if PLATFORM == 'gcc':
         CFLAGS += ' -O2'
 
     CXXFLAGS = CFLAGS 
-    CFLAGS += ' -std=c99'
 
     POST_ACTION = OBJCPY + ' -O binary $TARGET rtthread.bin\n' + SIZE + ' $TARGET \n'
 
diff --git a/bsp/stm32/libraries/templates/stm32f7xx/rtconfig.py b/bsp/stm32/libraries/templates/stm32f7xx/rtconfig.py
index 51fdf4d64a..74c4f9fee6 100644
--- a/bsp/stm32/libraries/templates/stm32f7xx/rtconfig.py
+++ b/bsp/stm32/libraries/templates/stm32f7xx/rtconfig.py
@@ -58,7 +58,6 @@ if PLATFORM == 'gcc':
         CFLAGS += ' -O2'
 
     CXXFLAGS = CFLAGS 
-    CFLAGS += ' -std=c99'
 
     POST_ACTION = OBJCPY + ' -O binary $TARGET rtthread.bin\n' + SIZE + ' $TARGET \n'
 
diff --git a/bsp/stm32/libraries/templates/stm32l4xx/rtconfig.py b/bsp/stm32/libraries/templates/stm32l4xx/rtconfig.py
index ae800430f2..2e022a964b 100644
--- a/bsp/stm32/libraries/templates/stm32l4xx/rtconfig.py
+++ b/bsp/stm32/libraries/templates/stm32l4xx/rtconfig.py
@@ -58,7 +58,6 @@ if PLATFORM == 'gcc':
         CFLAGS += ' -O2'
 
     CXXFLAGS = CFLAGS 
-    CFLAGS += ' -std=c99'
 
     POST_ACTION = OBJCPY + ' -O binary $TARGET rtthread.bin\n' + SIZE + ' $TARGET \n'
 
diff --git a/bsp/stm32/stm32f091-st-nucleo/rtconfig.py b/bsp/stm32/stm32f091-st-nucleo/rtconfig.py
index 3c8992f7d0..bbc6a35774 100644
--- a/bsp/stm32/stm32f091-st-nucleo/rtconfig.py
+++ b/bsp/stm32/stm32f091-st-nucleo/rtconfig.py
@@ -58,7 +58,6 @@ if PLATFORM == 'gcc':
         CFLAGS += ' -O2'
 
     CXXFLAGS = CFLAGS 
-    CFLAGS += ' -std=c99'
 
     POST_ACTION = OBJCPY + ' -O binary $TARGET rtthread.bin\n' + SIZE + ' $TARGET \n'
 
diff --git a/bsp/stm32/stm32f103-atk-nano/rtconfig.py b/bsp/stm32/stm32f103-atk-nano/rtconfig.py
index 91aba62478..9ace3b0a3c 100644
--- a/bsp/stm32/stm32f103-atk-nano/rtconfig.py
+++ b/bsp/stm32/stm32f103-atk-nano/rtconfig.py
@@ -58,7 +58,6 @@ if PLATFORM == 'gcc':
         CFLAGS += ' -O2'
 
     CXXFLAGS = CFLAGS 
-    CFLAGS += ' -std=c99'
 
     POST_ACTION = OBJCPY + ' -O binary $TARGET rtthread.bin\n' + SIZE + ' $TARGET \n'
 
diff --git a/bsp/stm32/stm32f103-atk-warshipv3/rtconfig.py b/bsp/stm32/stm32f103-atk-warshipv3/rtconfig.py
index c6d16622da..fa46b74340 100644
--- a/bsp/stm32/stm32f103-atk-warshipv3/rtconfig.py
+++ b/bsp/stm32/stm32f103-atk-warshipv3/rtconfig.py
@@ -58,7 +58,6 @@ if PLATFORM == 'gcc':
         CFLAGS += ' -O2'
 
     CXXFLAGS = CFLAGS 
-    CFLAGS += ' -std=c99'
 
     POST_ACTION = OBJCPY + ' -O binary $TARGET rtthread.bin\n' + SIZE + ' $TARGET \n'
 
diff --git a/bsp/stm32/stm32f103-dofly-lyc8/rtconfig.py b/bsp/stm32/stm32f103-dofly-lyc8/rtconfig.py
index 91aba62478..9ace3b0a3c 100644
--- a/bsp/stm32/stm32f103-dofly-lyc8/rtconfig.py
+++ b/bsp/stm32/stm32f103-dofly-lyc8/rtconfig.py
@@ -58,7 +58,6 @@ if PLATFORM == 'gcc':
         CFLAGS += ' -O2'
 
     CXXFLAGS = CFLAGS 
-    CFLAGS += ' -std=c99'
 
     POST_ACTION = OBJCPY + ' -O binary $TARGET rtthread.bin\n' + SIZE + ' $TARGET \n'
 
diff --git a/bsp/stm32/stm32f103-fire-arbitrary/rtconfig.py b/bsp/stm32/stm32f103-fire-arbitrary/rtconfig.py
index 91aba62478..9ace3b0a3c 100644
--- a/bsp/stm32/stm32f103-fire-arbitrary/rtconfig.py
+++ b/bsp/stm32/stm32f103-fire-arbitrary/rtconfig.py
@@ -58,7 +58,6 @@ if PLATFORM == 'gcc':
         CFLAGS += ' -O2'
 
     CXXFLAGS = CFLAGS 
-    CFLAGS += ' -std=c99'
 
     POST_ACTION = OBJCPY + ' -O binary $TARGET rtthread.bin\n' + SIZE + ' $TARGET \n'
 
diff --git a/bsp/stm32/stm32f103-hw100k-ibox/rtconfig.py b/bsp/stm32/stm32f103-hw100k-ibox/rtconfig.py
index c6d16622da..fa46b74340 100644
--- a/bsp/stm32/stm32f103-hw100k-ibox/rtconfig.py
+++ b/bsp/stm32/stm32f103-hw100k-ibox/rtconfig.py
@@ -58,7 +58,6 @@ if PLATFORM == 'gcc':
         CFLAGS += ' -O2'
 
     CXXFLAGS = CFLAGS 
-    CFLAGS += ' -std=c99'
 
     POST_ACTION = OBJCPY + ' -O binary $TARGET rtthread.bin\n' + SIZE + ' $TARGET \n'
 
diff --git a/bsp/stm32/stm32f103-mini-system/rtconfig.py b/bsp/stm32/stm32f103-mini-system/rtconfig.py
index a839777aef..c16c2fdda7 100644
--- a/bsp/stm32/stm32f103-mini-system/rtconfig.py
+++ b/bsp/stm32/stm32f103-mini-system/rtconfig.py
@@ -58,7 +58,6 @@ if PLATFORM == 'gcc':
         CFLAGS += ' -O2'
 
     CXXFLAGS = CFLAGS 
-    CFLAGS += ' -std=c99'
 
     POST_ACTION = OBJCPY + ' -O binary $TARGET rtthread.bin\n' + SIZE + ' $TARGET \n'
 
diff --git a/bsp/stm32/stm32f107-uc-eval/rtconfig.py b/bsp/stm32/stm32f107-uc-eval/rtconfig.py
index 91aba62478..9ace3b0a3c 100644
--- a/bsp/stm32/stm32f107-uc-eval/rtconfig.py
+++ b/bsp/stm32/stm32f107-uc-eval/rtconfig.py
@@ -58,7 +58,6 @@ if PLATFORM == 'gcc':
         CFLAGS += ' -O2'
 
     CXXFLAGS = CFLAGS 
-    CFLAGS += ' -std=c99'
 
     POST_ACTION = OBJCPY + ' -O binary $TARGET rtthread.bin\n' + SIZE + ' $TARGET \n'
 
diff --git a/bsp/stm32/stm32f401-st-nucleo/rtconfig.py b/bsp/stm32/stm32f401-st-nucleo/rtconfig.py
index 3aafec60b8..3b4b3a5208 100644
--- a/bsp/stm32/stm32f401-st-nucleo/rtconfig.py
+++ b/bsp/stm32/stm32f401-st-nucleo/rtconfig.py
@@ -58,7 +58,6 @@ if PLATFORM == 'gcc':
         CFLAGS += ' -O2'
 
     CXXFLAGS = CFLAGS 
-    CFLAGS += ' -std=c99'
 
     POST_ACTION = OBJCPY + ' -O binary $TARGET rtthread.bin\n' + SIZE + ' $TARGET \n'
 
diff --git a/bsp/stm32/stm32f405-smdz-breadfruit/rtconfig.py b/bsp/stm32/stm32f405-smdz-breadfruit/rtconfig.py
index 5094363dfa..81e39f9513 100644
--- a/bsp/stm32/stm32f405-smdz-breadfruit/rtconfig.py
+++ b/bsp/stm32/stm32f405-smdz-breadfruit/rtconfig.py
@@ -58,7 +58,6 @@ if PLATFORM == 'gcc':
         CFLAGS += ' -O2'
 
     CXXFLAGS = CFLAGS 
-    CFLAGS += ' -std=c99'
 
     POST_ACTION = OBJCPY + ' -O binary $TARGET rtthread.bin\n' + SIZE + ' $TARGET \n'
 
diff --git a/bsp/stm32/stm32f407-atk-explorer/rtconfig.py b/bsp/stm32/stm32f407-atk-explorer/rtconfig.py
index 4a9fe33cef..638f59502a 100644
--- a/bsp/stm32/stm32f407-atk-explorer/rtconfig.py
+++ b/bsp/stm32/stm32f407-atk-explorer/rtconfig.py
@@ -58,7 +58,6 @@ if PLATFORM == 'gcc':
         CFLAGS += ' -O2'
 
     CXXFLAGS = CFLAGS 
-    CFLAGS += ' -std=c99'
 
     POST_ACTION = OBJCPY + ' -O binary $TARGET rtthread.bin\n' + SIZE + ' $TARGET \n'
 
diff --git a/bsp/stm32/stm32f407-st-discovery/rtconfig.py b/bsp/stm32/stm32f407-st-discovery/rtconfig.py
index 4f3dbc90ee..32024fa83a 100644
--- a/bsp/stm32/stm32f407-st-discovery/rtconfig.py
+++ b/bsp/stm32/stm32f407-st-discovery/rtconfig.py
@@ -58,7 +58,6 @@ if PLATFORM == 'gcc':
         CFLAGS += ' -O2'
 
     CXXFLAGS = CFLAGS 
-    CFLAGS += ' -std=c99'
 
     POST_ACTION = OBJCPY + ' -O binary $TARGET rtthread.bin\n' + SIZE + ' $TARGET \n'
 
diff --git a/bsp/stm32/stm32f411-st-nucleo/rtconfig.py b/bsp/stm32/stm32f411-st-nucleo/rtconfig.py
index 69a32c6da2..8c0a3e1281 100644
--- a/bsp/stm32/stm32f411-st-nucleo/rtconfig.py
+++ b/bsp/stm32/stm32f411-st-nucleo/rtconfig.py
@@ -58,7 +58,6 @@ if PLATFORM == 'gcc':
         CFLAGS += ' -O2'
 
     CXXFLAGS = CFLAGS 
-    CFLAGS += ' -std=c99'
 
     POST_ACTION = OBJCPY + ' -O binary $TARGET rtthread.bin\n' + SIZE + ' $TARGET \n'
 
diff --git a/bsp/stm32/stm32f429-armfly-v6/rtconfig.py b/bsp/stm32/stm32f429-armfly-v6/rtconfig.py
index 3bb974643b..79419c6c06 100644
--- a/bsp/stm32/stm32f429-armfly-v6/rtconfig.py
+++ b/bsp/stm32/stm32f429-armfly-v6/rtconfig.py
@@ -58,7 +58,6 @@ if PLATFORM == 'gcc':
         CFLAGS += ' -O2'
 
     CXXFLAGS = CFLAGS 
-    CFLAGS += ' -std=c99'
 
     POST_ACTION = OBJCPY + ' -O binary $TARGET rtthread.bin\n' + SIZE + ' $TARGET \n'
 
diff --git a/bsp/stm32/stm32f429-atk-apollo/rtconfig.py b/bsp/stm32/stm32f429-atk-apollo/rtconfig.py
index 4a9fe33cef..638f59502a 100644
--- a/bsp/stm32/stm32f429-atk-apollo/rtconfig.py
+++ b/bsp/stm32/stm32f429-atk-apollo/rtconfig.py
@@ -58,7 +58,6 @@ if PLATFORM == 'gcc':
         CFLAGS += ' -O2'
 
     CXXFLAGS = CFLAGS 
-    CFLAGS += ' -std=c99'
 
     POST_ACTION = OBJCPY + ' -O binary $TARGET rtthread.bin\n' + SIZE + ' $TARGET \n'
 
diff --git a/bsp/stm32/stm32f429-fire-challenger/rtconfig.py b/bsp/stm32/stm32f429-fire-challenger/rtconfig.py
index 4a9fe33cef..638f59502a 100644
--- a/bsp/stm32/stm32f429-fire-challenger/rtconfig.py
+++ b/bsp/stm32/stm32f429-fire-challenger/rtconfig.py
@@ -58,7 +58,6 @@ if PLATFORM == 'gcc':
         CFLAGS += ' -O2'
 
     CXXFLAGS = CFLAGS 
-    CFLAGS += ' -std=c99'
 
     POST_ACTION = OBJCPY + ' -O binary $TARGET rtthread.bin\n' + SIZE + ' $TARGET \n'
 
diff --git a/bsp/stm32/stm32f446-st-nucleo/rtconfig.py b/bsp/stm32/stm32f446-st-nucleo/rtconfig.py
index 4a9fe33cef..638f59502a 100644
--- a/bsp/stm32/stm32f446-st-nucleo/rtconfig.py
+++ b/bsp/stm32/stm32f446-st-nucleo/rtconfig.py
@@ -58,7 +58,6 @@ if PLATFORM == 'gcc':
         CFLAGS += ' -O2'
 
     CXXFLAGS = CFLAGS 
-    CFLAGS += ' -std=c99'
 
     POST_ACTION = OBJCPY + ' -O binary $TARGET rtthread.bin\n' + SIZE + ' $TARGET \n'
 
diff --git a/bsp/stm32/stm32f746-st-disco/rtconfig.py b/bsp/stm32/stm32f746-st-disco/rtconfig.py
index 4c4dc4ef02..0b3bfc1ac9 100644
--- a/bsp/stm32/stm32f746-st-disco/rtconfig.py
+++ b/bsp/stm32/stm32f746-st-disco/rtconfig.py
@@ -57,7 +57,6 @@ if PLATFORM == 'gcc':
         CFLAGS += ' -O2 -Os'
 
     CXXFLAGS = CFLAGS 
-    CFLAGS += ' -std=c99'
     
     POST_ACTION = OBJCPY + ' -O binary $TARGET rtthread.bin\n' + SIZE + ' $TARGET \n'
 
diff --git a/bsp/stm32/stm32f767-atk-apollo/rtconfig.py b/bsp/stm32/stm32f767-atk-apollo/rtconfig.py
index 251d8168e7..dedc1b9580 100644
--- a/bsp/stm32/stm32f767-atk-apollo/rtconfig.py
+++ b/bsp/stm32/stm32f767-atk-apollo/rtconfig.py
@@ -58,7 +58,6 @@ if PLATFORM == 'gcc':
         CFLAGS += ' -O2'
 
     CXXFLAGS = CFLAGS 
-    CFLAGS += ' -std=c99'
 
     POST_ACTION = OBJCPY + ' -O binary $TARGET rtthread.bin\n' + SIZE + ' $TARGET \n'
 
diff --git a/bsp/stm32/stm32f767-fire-challenger/rtconfig.py b/bsp/stm32/stm32f767-fire-challenger/rtconfig.py
index 93d7b66033..7a46cc624d 100644
--- a/bsp/stm32/stm32f767-fire-challenger/rtconfig.py
+++ b/bsp/stm32/stm32f767-fire-challenger/rtconfig.py
@@ -58,7 +58,6 @@ if PLATFORM == 'gcc':
         CFLAGS += ' -O2'
 
     CXXFLAGS = CFLAGS 
-    CFLAGS += ' -std=c99'
 
     POST_ACTION = OBJCPY + ' -O binary $TARGET rtthread.bin\n' + SIZE + ' $TARGET \n'
 
diff --git a/bsp/stm32/stm32f767-st-nucleo/rtconfig.py b/bsp/stm32/stm32f767-st-nucleo/rtconfig.py
index ef578d17ca..ac2cda234b 100644
--- a/bsp/stm32/stm32f767-st-nucleo/rtconfig.py
+++ b/bsp/stm32/stm32f767-st-nucleo/rtconfig.py
@@ -57,7 +57,6 @@ if PLATFORM == 'gcc':
         CFLAGS += ' -O2 -Os'
 
     CXXFLAGS = CFLAGS 
-    CFLAGS += ' -std=c99'
 
     POST_ACTION = OBJCPY + ' -O binary $TARGET rtthread.bin\n' + SIZE + ' $TARGET \n'
 
diff --git a/bsp/stm32/stm32g071-st-nucleo/rtconfig.py b/bsp/stm32/stm32g071-st-nucleo/rtconfig.py
index 7b2a05c9e3..d86774675d 100644
--- a/bsp/stm32/stm32g071-st-nucleo/rtconfig.py
+++ b/bsp/stm32/stm32g071-st-nucleo/rtconfig.py
@@ -58,7 +58,6 @@ if PLATFORM == 'gcc':
         CFLAGS += ' -O2'
 
     CXXFLAGS = CFLAGS 
-    CFLAGS += ' -std=c99'
 
     POST_ACTION = OBJCPY + ' -O binary $TARGET rtthread.bin\n' + SIZE + ' $TARGET \n'
 
diff --git a/bsp/stm32/stm32l053-st-nucleo/rtconfig.py b/bsp/stm32/stm32l053-st-nucleo/rtconfig.py
index ff1b0664a5..39d6af6879 100644
--- a/bsp/stm32/stm32l053-st-nucleo/rtconfig.py
+++ b/bsp/stm32/stm32l053-st-nucleo/rtconfig.py
@@ -58,7 +58,6 @@ if PLATFORM == 'gcc':
         CFLAGS += ' -O2'
 
     CXXFLAGS = CFLAGS 
-    CFLAGS += ' -std=c99'
     
     POST_ACTION = OBJCPY + ' -O binary $TARGET rtthread.bin\n' + SIZE + ' $TARGET \n'
 
diff --git a/bsp/stm32/stm32l432-st-nucleo/rtconfig.py b/bsp/stm32/stm32l432-st-nucleo/rtconfig.py
index ae800430f2..2e022a964b 100644
--- a/bsp/stm32/stm32l432-st-nucleo/rtconfig.py
+++ b/bsp/stm32/stm32l432-st-nucleo/rtconfig.py
@@ -58,7 +58,6 @@ if PLATFORM == 'gcc':
         CFLAGS += ' -O2'
 
     CXXFLAGS = CFLAGS 
-    CFLAGS += ' -std=c99'
 
     POST_ACTION = OBJCPY + ' -O binary $TARGET rtthread.bin\n' + SIZE + ' $TARGET \n'
 
diff --git a/bsp/stm32/stm32l475-atk-pandora/rtconfig.py b/bsp/stm32/stm32l475-atk-pandora/rtconfig.py
index 2b495647e4..40b84ad846 100644
--- a/bsp/stm32/stm32l475-atk-pandora/rtconfig.py
+++ b/bsp/stm32/stm32l475-atk-pandora/rtconfig.py
@@ -58,7 +58,6 @@ if PLATFORM == 'gcc':
         CFLAGS += ' -O2'
 
     CXXFLAGS = CFLAGS 
-    CFLAGS += ' -std=c99'
 
     POST_ACTION = OBJCPY + ' -O binary $TARGET rtthread.bin\n' + SIZE + ' $TARGET \n'
 
diff --git a/bsp/stm32/stm32l475-st-discovery/rtconfig.py b/bsp/stm32/stm32l475-st-discovery/rtconfig.py
index 2876ce6761..3e4718a482 100644
--- a/bsp/stm32/stm32l475-st-discovery/rtconfig.py
+++ b/bsp/stm32/stm32l475-st-discovery/rtconfig.py
@@ -58,7 +58,6 @@ if PLATFORM == 'gcc':
         CFLAGS += ' -O2'
 
     CXXFLAGS = CFLAGS 
-    CFLAGS += ' -std=c99'
 
     POST_ACTION = OBJCPY + ' -O binary $TARGET rtthread.bin\n' + SIZE + ' $TARGET \n'
 
diff --git a/bsp/stm32/stm32l476-st-nucleo/rtconfig.py b/bsp/stm32/stm32l476-st-nucleo/rtconfig.py
index f13d785d54..7fc0f14860 100644
--- a/bsp/stm32/stm32l476-st-nucleo/rtconfig.py
+++ b/bsp/stm32/stm32l476-st-nucleo/rtconfig.py
@@ -58,7 +58,6 @@ if PLATFORM == 'gcc':
         CFLAGS += ' -O2'
 
     CXXFLAGS = CFLAGS 
-    CFLAGS += ' -std=c99'
 
     POST_ACTION = OBJCPY + ' -O binary $TARGET rtthread.bin\n' + SIZE + ' $TARGET \n'
 
diff --git a/bsp/stm32/stm32l496-ali-developer/rtconfig.py b/bsp/stm32/stm32l496-ali-developer/rtconfig.py
index ae800430f2..2e022a964b 100644
--- a/bsp/stm32/stm32l496-ali-developer/rtconfig.py
+++ b/bsp/stm32/stm32l496-ali-developer/rtconfig.py
@@ -58,7 +58,6 @@ if PLATFORM == 'gcc':
         CFLAGS += ' -O2'
 
     CXXFLAGS = CFLAGS 
-    CFLAGS += ' -std=c99'
 
     POST_ACTION = OBJCPY + ' -O binary $TARGET rtthread.bin\n' + SIZE + ' $TARGET \n'
 
diff --git a/bsp/stm32f4xx-HAL/rtconfig.py b/bsp/stm32f4xx-HAL/rtconfig.py
index 39d157a9dc..7dfb083d1a 100644
--- a/bsp/stm32f4xx-HAL/rtconfig.py
+++ b/bsp/stm32f4xx-HAL/rtconfig.py
@@ -43,7 +43,7 @@ if PLATFORM == 'gcc':
     OBJCPY = PREFIX + 'objcopy'
 	
     DEVICE = ' -mcpu=cortex-m4 -mthumb -mfpu=fpv4-sp-d16 -mfloat-abi=hard -ffunction-sections -fdata-sections'
-    CFLAGS = DEVICE + ' -std=c99'
+    CFLAGS = DEVICE
     AFLAGS = ' -c' + DEVICE + ' -x assembler-with-cpp -Wa,-mimplicit-it=thumb '
     LFLAGS = DEVICE + ' -Wl,--gc-sections,-Map=rtthread-stm32.map,-cref,-u,Reset_Handler -T stm32_rom.ld'
 
diff --git a/bsp/swm320-lq100/rtconfig.py b/bsp/swm320-lq100/rtconfig.py
index c8f9102c76..7d827e2ab2 100644
--- a/bsp/swm320-lq100/rtconfig.py
+++ b/bsp/swm320-lq100/rtconfig.py
@@ -45,7 +45,7 @@ if PLATFORM == 'gcc':
 
     DEVICE = ' -mcpu=' + CPU + ' -mthumb -mfpu=' + FPU + ' -mfloat-abi=' + \
         FLOAT_ABI + ' -ffunction-sections -fdata-sections'
-    CFLAGS = DEVICE + ' -std=c99'
+    CFLAGS = DEVICE
     AFLAGS = ' -c' + DEVICE + ' -x assembler-with-cpp -Wa,-mimplicit-it=thumb '
     LFLAGS = DEVICE + ' -Wl,--gc-sections,-Map=rtthread.map,-cref,-u,Reset_Handler -T drivers/linker_scripts/link.lds'
 
diff --git a/bsp/tm4c129x/rtconfig.py b/bsp/tm4c129x/rtconfig.py
index 8db01c509b..691d51358b 100644
--- a/bsp/tm4c129x/rtconfig.py
+++ b/bsp/tm4c129x/rtconfig.py
@@ -43,7 +43,7 @@ if PLATFORM == 'gcc':
     OBJCPY = PREFIX + 'objcopy'
     
     DEVICE = ' -mcpu=cortex-m4 -mthumb -mfpu=fpv4-sp-d16 -mfloat-abi=softfp -ffunction-sections -fdata-sections'
-    CFLAGS = DEVICE + ' -std=c99 -Dgcc'
+    CFLAGS = DEVICE + ' -Dgcc'
     AFLAGS = ' -c' + DEVICE + ' -x assembler-with-cpp -Wa,-mimplicit-it=thumb '
     LFLAGS = DEVICE + ' -Wl,--gc-sections,-Map=rtthread-tm4c129x.map,-cref,-u,Reset_Handler -T tm4c_rom.ld'
 
-- 
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