diff --git a/bsp/stm32/libraries/templates/stm32f0xx/SConstruct b/bsp/stm32/libraries/templates/stm32f0xx/SConstruct
index c120f925df4ab8d990e5e95e2fe56b1d671a93b9..7979e3a23ed06d9558cf03e7108fa9249ff9ef78 100644
--- a/bsp/stm32/libraries/templates/stm32f0xx/SConstruct
+++ b/bsp/stm32/libraries/templates/stm32f0xx/SConstruct
@@ -21,6 +21,7 @@ env = Environment(tools = ['mingw'],
     AS = rtconfig.AS, ASFLAGS = rtconfig.AFLAGS,
     CC = rtconfig.CC, CCFLAGS = rtconfig.CFLAGS,
     AR = rtconfig.AR, ARFLAGS = '-rc',
+    CXX = rtconfig.CXX, CXXFLAGS = rtconfig.CXXFLAGS,
     LINK = rtconfig.LINK, LINKFLAGS = rtconfig.LFLAGS)
 env.PrependENVPath('PATH', rtconfig.EXEC_PATH)
 
diff --git a/bsp/stm32/libraries/templates/stm32f0xx/board/linker_scripts/link.lds b/bsp/stm32/libraries/templates/stm32f0xx/board/linker_scripts/link.lds
index be18c21a298e2e321417a1452627d6d88ecc408d..222ed45f3819a71c4baca41272f89d2327ee55b1 100644
--- a/bsp/stm32/libraries/templates/stm32f0xx/board/linker_scripts/link.lds
+++ b/bsp/stm32/libraries/templates/stm32f0xx/board/linker_scripts/link.lds
@@ -46,6 +46,14 @@ SECTIONS
         __rt_init_end = .;
 
         . = ALIGN(4);
+
+        PROVIDE(__ctors_start__ = .);
+        KEEP (*(SORT(.init_array.*)))
+        KEEP (*(.init_array))
+        PROVIDE(__ctors_end__ = .);
+
+        . = ALIGN(4);
+
         _etext = .;
     } > ROM = 0
 
@@ -72,6 +80,12 @@ SECTIONS
         *(.data.*)
         *(.gnu.linkonce.d*)
 
+
+        PROVIDE(__dtors_start__ = .);
+        KEEP(*(SORT(.dtors.*)))
+        KEEP(*(.dtors))
+        PROVIDE(__dtors_end__ = .);
+
         . = ALIGN(4);
         /* This is used by the startup in order to initialize the .data secion */
         _edata = . ;
diff --git a/bsp/stm32/libraries/templates/stm32f0xx/rtconfig.py b/bsp/stm32/libraries/templates/stm32f0xx/rtconfig.py
index c4d744f4f3d888af50a278e44098828a082c9655..3c8992f7d01582ecc40216354adbb9fabafdd849 100644
--- a/bsp/stm32/libraries/templates/stm32f0xx/rtconfig.py
+++ b/bsp/stm32/libraries/templates/stm32f0xx/rtconfig.py
@@ -44,7 +44,7 @@ if PLATFORM == 'gcc':
     OBJCPY = PREFIX + 'objcopy'
 
     DEVICE = ' -mcpu=cortex-m0 -mthumb -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=rt-thread.map,-cref,-u,Reset_Handler -T board/linker_scripts/link.lds'
 
@@ -57,11 +57,15 @@ if PLATFORM == 'gcc':
     else:
         CFLAGS += ' -O2'
 
+    CXXFLAGS = CFLAGS 
+    CFLAGS += ' -std=c99'
+
     POST_ACTION = OBJCPY + ' -O binary $TARGET rtthread.bin\n' + SIZE + ' $TARGET \n'
 
 elif PLATFORM == 'armcc':
     # toolchains
     CC = 'armcc'
+    CXX = 'armcc'
     AS = 'armasm'
     AR = 'armar'
     LINK = 'armlink'
@@ -85,11 +89,15 @@ elif PLATFORM == 'armcc':
     else:
         CFLAGS += ' -O2'
 
+    CXXFLAGS = CFLAGS 
+    CFLAGS += ' -std=c99'
+
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'
+    CXX = 'iccarm'
     AS = 'iasmarm'
     AR = 'iarchive'
     LINK = 'ilinkarm'
@@ -130,5 +138,7 @@ elif PLATFORM == 'iar':
     LFLAGS = ' --config "board/linker_scripts/link.icf"'
     LFLAGS += ' --entry __iar_program_start'
 
+    CXXFLAGS = CFLAGS
+    
     EXEC_PATH = EXEC_PATH + '/arm/bin/'
     POST_ACTION = 'ielftool --bin $TARGET rtthread.bin'
diff --git a/bsp/stm32/libraries/templates/stm32f10x/SConstruct b/bsp/stm32/libraries/templates/stm32f10x/SConstruct
index 05326b2b755fed11adc30f979ea01faf8bb5cfd6..27b5e7fccce3302bc36debeac6842b661a04a663 100644
--- a/bsp/stm32/libraries/templates/stm32f10x/SConstruct
+++ b/bsp/stm32/libraries/templates/stm32f10x/SConstruct
@@ -21,6 +21,7 @@ env = Environment(tools = ['mingw'],
     AS = rtconfig.AS, ASFLAGS = rtconfig.AFLAGS,
     CC = rtconfig.CC, CCFLAGS = rtconfig.CFLAGS,
     AR = rtconfig.AR, ARFLAGS = '-rc',
+    CXX = rtconfig.CXX, CXXFLAGS = rtconfig.CXXFLAGS,
     LINK = rtconfig.LINK, LINKFLAGS = rtconfig.LFLAGS)
 env.PrependENVPath('PATH', rtconfig.EXEC_PATH)
 
diff --git a/bsp/stm32/libraries/templates/stm32f10x/board/linker_scripts/link.lds b/bsp/stm32/libraries/templates/stm32f10x/board/linker_scripts/link.lds
index 74d06fdc5757a3c990b76e04aefa2fab47d78400..d22c800cabea2927f5a1d708fde3da18b7f18f16 100644
--- a/bsp/stm32/libraries/templates/stm32f10x/board/linker_scripts/link.lds
+++ b/bsp/stm32/libraries/templates/stm32f10x/board/linker_scripts/link.lds
@@ -46,6 +46,14 @@ SECTIONS
         __rt_init_end = .;
 
         . = ALIGN(4);
+
+        PROVIDE(__ctors_start__ = .);
+        KEEP (*(SORT(.init_array.*)))
+        KEEP (*(.init_array))
+        PROVIDE(__ctors_end__ = .);
+
+        . = ALIGN(4);
+
         _etext = .;
     } > ROM = 0
 
@@ -72,6 +80,11 @@ SECTIONS
         *(.data.*)
         *(.gnu.linkonce.d*)
 
+        PROVIDE(__dtors_start__ = .);
+        KEEP(*(SORT(.dtors.*)))
+        KEEP(*(.dtors))
+        PROVIDE(__dtors_end__ = .);
+
         . = ALIGN(4);
         /* This is used by the startup in order to initialize the .data secion */
         _edata = . ;
diff --git a/bsp/stm32/libraries/templates/stm32f10x/rtconfig.py b/bsp/stm32/libraries/templates/stm32f10x/rtconfig.py
index 40826ac99e18049c751f057ab72c8c53c0cdd13c..c6d16622da8a2f0014ed8749ebd90a09ced91d69 100644
--- a/bsp/stm32/libraries/templates/stm32f10x/rtconfig.py
+++ b/bsp/stm32/libraries/templates/stm32f10x/rtconfig.py
@@ -44,7 +44,7 @@ if PLATFORM == 'gcc':
     OBJCPY = PREFIX + 'objcopy'
 
     DEVICE = ' -mcpu=cortex-m3 -mthumb -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=rt-thread.map,-cref,-u,Reset_Handler -T board/linker_scripts/link.lds'
 
@@ -57,11 +57,15 @@ if PLATFORM == 'gcc':
     else:
         CFLAGS += ' -O2'
 
+    CXXFLAGS = CFLAGS 
+    CFLAGS += ' -std=c99'
+
     POST_ACTION = OBJCPY + ' -O binary $TARGET rtthread.bin\n' + SIZE + ' $TARGET \n'
 
 elif PLATFORM == 'armcc':
     # toolchains
     CC = 'armcc'
+    CXX = 'armcc'
     AS = 'armasm'
     AR = 'armar'
     LINK = 'armlink'
@@ -85,11 +89,15 @@ elif PLATFORM == 'armcc':
     else:
         CFLAGS += ' -O2'
 
+    CXXFLAGS = CFLAGS 
+    CFLAGS += ' -std=c99'
+
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'
+    CXX = 'iccarm'
     AS = 'iasmarm'
     AR = 'iarchive'
     LINK = 'ilinkarm'
@@ -130,5 +138,7 @@ elif PLATFORM == 'iar':
     LFLAGS = ' --config "board/linker_scripts/link.icf"'
     LFLAGS += ' --entry __iar_program_start'
 
+    CXXFLAGS = CFLAGS
+    
     EXEC_PATH = EXEC_PATH + '/arm/bin/'
     POST_ACTION = 'ielftool --bin $TARGET rtthread.bin'
diff --git a/bsp/stm32/libraries/templates/stm32f4xx/SConstruct b/bsp/stm32/libraries/templates/stm32f4xx/SConstruct
index 1101c708bdc865d6c4825b93e872b4b485798261..629f25c6ee6f4a645c8eec066935e414c62753a0 100644
--- a/bsp/stm32/libraries/templates/stm32f4xx/SConstruct
+++ b/bsp/stm32/libraries/templates/stm32f4xx/SConstruct
@@ -21,6 +21,7 @@ env = Environment(tools = ['mingw'],
     AS = rtconfig.AS, ASFLAGS = rtconfig.AFLAGS,
     CC = rtconfig.CC, CCFLAGS = rtconfig.CFLAGS,
     AR = rtconfig.AR, ARFLAGS = '-rc',
+    CXX = rtconfig.CXX, CXXFLAGS = rtconfig.CXXFLAGS,
     LINK = rtconfig.LINK, LINKFLAGS = rtconfig.LFLAGS)
 env.PrependENVPath('PATH', rtconfig.EXEC_PATH)
 
diff --git a/bsp/stm32/libraries/templates/stm32f4xx/board/linker_scripts/link.lds b/bsp/stm32/libraries/templates/stm32f4xx/board/linker_scripts/link.lds
index c6fe92740e50f7eb432799d51bf86f5db1c82d56..50169db32036958574462b05ef4b4406d155fde5 100644
--- a/bsp/stm32/libraries/templates/stm32f4xx/board/linker_scripts/link.lds
+++ b/bsp/stm32/libraries/templates/stm32f4xx/board/linker_scripts/link.lds
@@ -47,6 +47,14 @@ SECTIONS
         __rt_init_end = .;
 
         . = ALIGN(4);
+
+        PROVIDE(__ctors_start__ = .);
+        KEEP (*(SORT(.init_array.*)))
+        KEEP (*(.init_array))
+        PROVIDE(__ctors_end__ = .);
+
+        . = ALIGN(4);
+
         _etext = .;
     } > ROM = 0
 
@@ -73,6 +81,11 @@ SECTIONS
         *(.data.*)
         *(.gnu.linkonce.d*)
 
+        PROVIDE(__dtors_start__ = .);
+        KEEP(*(SORT(.dtors.*)))
+        KEEP(*(.dtors))
+        PROVIDE(__dtors_end__ = .);
+
         . = ALIGN(4);
         /* This is used by the startup in order to initialize the .data secion */
         _edata = . ;
diff --git a/bsp/stm32/libraries/templates/stm32f4xx/rtconfig.py b/bsp/stm32/libraries/templates/stm32f4xx/rtconfig.py
index 3241586f69fbfa0128724a3900c004ca490b5dba..4a9fe33cef7faf24e59b8909c2de8d26d3da78eb 100644
--- a/bsp/stm32/libraries/templates/stm32f4xx/rtconfig.py
+++ b/bsp/stm32/libraries/templates/stm32f4xx/rtconfig.py
@@ -44,7 +44,7 @@ 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'
+    CFLAGS = DEVICE + ' -Dgcc'
     AFLAGS = ' -c' + DEVICE + ' -x assembler-with-cpp -Wa,-mimplicit-it=thumb '
     LFLAGS = DEVICE + ' -Wl,--gc-sections,-Map=rt-thread.map,-cref,-u,Reset_Handler -T board/linker_scripts/link.lds'
 
@@ -57,11 +57,15 @@ if PLATFORM == 'gcc':
     else:
         CFLAGS += ' -O2'
 
+    CXXFLAGS = CFLAGS 
+    CFLAGS += ' -std=c99'
+
     POST_ACTION = OBJCPY + ' -O binary $TARGET rtthread.bin\n' + SIZE + ' $TARGET \n'
 
 elif PLATFORM == 'armcc':
     # toolchains
     CC = 'armcc'
+    CXX = 'armcc'
     AS = 'armasm'
     AR = 'armar'
     LINK = 'armlink'
@@ -85,11 +89,15 @@ elif PLATFORM == 'armcc':
     else:
         CFLAGS += ' -O2'
 
+    CXXFLAGS = CFLAGS 
+    CFLAGS += ' -std=c99'
+
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'
+    CXX = 'iccarm'
     AS = 'iasmarm'
     AR = 'iarchive'
     LINK = 'ilinkarm'
@@ -130,5 +138,7 @@ elif PLATFORM == 'iar':
     LFLAGS = ' --config "board/linker_scripts/link.icf"'
     LFLAGS += ' --entry __iar_program_start'
 
+    CXXFLAGS = CFLAGS
+    
     EXEC_PATH = EXEC_PATH + '/arm/bin/'
     POST_ACTION = 'ielftool --bin $TARGET rtthread.bin'
diff --git a/bsp/stm32/libraries/templates/stm32f7xx/SConstruct b/bsp/stm32/libraries/templates/stm32f7xx/SConstruct
index b6053d64c214908969ed5d0416a4ea9167e9f4a1..012e6b41bff80836ad9c69c617f3866b6142d5b6 100644
--- a/bsp/stm32/libraries/templates/stm32f7xx/SConstruct
+++ b/bsp/stm32/libraries/templates/stm32f7xx/SConstruct
@@ -21,6 +21,7 @@ env = Environment(tools = ['mingw'],
     AS = rtconfig.AS, ASFLAGS = rtconfig.AFLAGS,
     CC = rtconfig.CC, CCFLAGS = rtconfig.CFLAGS,
     AR = rtconfig.AR, ARFLAGS = '-rc',
+    CXX = rtconfig.CXX, CXXFLAGS = rtconfig.CXXFLAGS,
     LINK = rtconfig.LINK, LINKFLAGS = rtconfig.LFLAGS)
 env.PrependENVPath('PATH', rtconfig.EXEC_PATH)
 
diff --git a/bsp/stm32/libraries/templates/stm32f7xx/board/linker_scripts/link.lds b/bsp/stm32/libraries/templates/stm32f7xx/board/linker_scripts/link.lds
index c6fe92740e50f7eb432799d51bf86f5db1c82d56..50169db32036958574462b05ef4b4406d155fde5 100644
--- a/bsp/stm32/libraries/templates/stm32f7xx/board/linker_scripts/link.lds
+++ b/bsp/stm32/libraries/templates/stm32f7xx/board/linker_scripts/link.lds
@@ -47,6 +47,14 @@ SECTIONS
         __rt_init_end = .;
 
         . = ALIGN(4);
+
+        PROVIDE(__ctors_start__ = .);
+        KEEP (*(SORT(.init_array.*)))
+        KEEP (*(.init_array))
+        PROVIDE(__ctors_end__ = .);
+
+        . = ALIGN(4);
+
         _etext = .;
     } > ROM = 0
 
@@ -73,6 +81,11 @@ SECTIONS
         *(.data.*)
         *(.gnu.linkonce.d*)
 
+        PROVIDE(__dtors_start__ = .);
+        KEEP(*(SORT(.dtors.*)))
+        KEEP(*(.dtors))
+        PROVIDE(__dtors_end__ = .);
+
         . = ALIGN(4);
         /* This is used by the startup in order to initialize the .data secion */
         _edata = . ;
diff --git a/bsp/stm32/libraries/templates/stm32f7xx/rtconfig.py b/bsp/stm32/libraries/templates/stm32f7xx/rtconfig.py
index 5b01587ff9964b137f9c5294f4e0c1de3fc618ff..51fdf4d64a7d3339beefa9655d423f6cbbe0ba7f 100644
--- a/bsp/stm32/libraries/templates/stm32f7xx/rtconfig.py
+++ b/bsp/stm32/libraries/templates/stm32f7xx/rtconfig.py
@@ -44,7 +44,7 @@ if PLATFORM == 'gcc':
     OBJCPY = PREFIX + 'objcopy'
 
     DEVICE = ' -mcpu=cortex-m7 -mthumb -mfpu=fpv5-d16 -mfloat-abi=hard -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=rt-thread.map,-cref,-u,Reset_Handler -T board/linker_scripts/link.lds'
 
@@ -57,11 +57,15 @@ if PLATFORM == 'gcc':
     else:
         CFLAGS += ' -O2'
 
+    CXXFLAGS = CFLAGS 
+    CFLAGS += ' -std=c99'
+
     POST_ACTION = OBJCPY + ' -O binary $TARGET rtthread.bin\n' + SIZE + ' $TARGET \n'
 
 elif PLATFORM == 'armcc':
     # toolchains
     CC = 'armcc'
+    CXX = 'armcc'
     AS = 'armasm'
     AR = 'armar'
     LINK = 'armlink'
@@ -85,12 +89,14 @@ elif PLATFORM == 'armcc':
     else:
         CFLAGS += ' -O2'
 
-    CXXFLAGS = CFLAGS
+    CXXFLAGS = CFLAGS 
+    
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'
+    CXX = 'iccarm'
     AS = 'iasmarm'
     AR = 'iarchive'
     LINK = 'ilinkarm'
@@ -131,5 +137,7 @@ elif PLATFORM == 'iar':
     LFLAGS = ' --config "board/linker_scripts/link.icf"'
     LFLAGS += ' --entry __iar_program_start'
 
+    CXXFLAGS = CFLAGS
+    
     EXEC_PATH = EXEC_PATH + '/arm/bin/'
     POST_ACTION = 'ielftool --bin $TARGET rtthread.bin'
diff --git a/bsp/stm32/libraries/templates/stm32l4xx/SConstruct b/bsp/stm32/libraries/templates/stm32l4xx/SConstruct
index e1989a9d815bbffd7e87d257337ad83e6e487ff4..58a36adbfcda854f736ce3ae40262f4cdf92a9b0 100644
--- a/bsp/stm32/libraries/templates/stm32l4xx/SConstruct
+++ b/bsp/stm32/libraries/templates/stm32l4xx/SConstruct
@@ -21,6 +21,7 @@ env = Environment(tools = ['mingw'],
     AS = rtconfig.AS, ASFLAGS = rtconfig.AFLAGS,
     CC = rtconfig.CC, CCFLAGS = rtconfig.CFLAGS,
     AR = rtconfig.AR, ARFLAGS = '-rc',
+    CXX = rtconfig.CXX, CXXFLAGS = rtconfig.CXXFLAGS,
     LINK = rtconfig.LINK, LINKFLAGS = rtconfig.LFLAGS)
 env.PrependENVPath('PATH', rtconfig.EXEC_PATH)
 
diff --git a/bsp/stm32/libraries/templates/stm32l4xx/board/linker_scripts/link.lds b/bsp/stm32/libraries/templates/stm32l4xx/board/linker_scripts/link.lds
index 2d009e649bd981d1b8e09fc912bcedcd7ecfb98a..d58eaf11094eb0b429a5349dfff2056946d8da45 100644
--- a/bsp/stm32/libraries/templates/stm32l4xx/board/linker_scripts/link.lds
+++ b/bsp/stm32/libraries/templates/stm32l4xx/board/linker_scripts/link.lds
@@ -46,6 +46,14 @@ SECTIONS
         __rt_init_end = .;
 
         . = ALIGN(4);
+
+        PROVIDE(__ctors_start__ = .);
+        KEEP (*(SORT(.init_array.*)))
+        KEEP (*(.init_array))
+        PROVIDE(__ctors_end__ = .);
+
+        . = ALIGN(4);
+
         _etext = .;
     } > ROM = 0
 
@@ -72,6 +80,11 @@ SECTIONS
         *(.data.*)
         *(.gnu.linkonce.d*)
 
+        PROVIDE(__dtors_start__ = .);
+        KEEP(*(SORT(.dtors.*)))
+        KEEP(*(.dtors))
+        PROVIDE(__dtors_end__ = .);
+
         . = ALIGN(4);
         /* This is used by the startup in order to initialize the .data secion */
         _edata = . ;
diff --git a/bsp/stm32/libraries/templates/stm32l4xx/rtconfig.py b/bsp/stm32/libraries/templates/stm32l4xx/rtconfig.py
index d632114e2d35f232096fde113c44c96790ae288c..ae800430f2c622c858cc3a84b10097d77b1efe0f 100644
--- a/bsp/stm32/libraries/templates/stm32l4xx/rtconfig.py
+++ b/bsp/stm32/libraries/templates/stm32l4xx/rtconfig.py
@@ -44,7 +44,7 @@ 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'
+    CFLAGS = DEVICE + ' -Dgcc'
     AFLAGS = ' -c' + DEVICE + ' -x assembler-with-cpp -Wa,-mimplicit-it=thumb '
     LFLAGS = DEVICE + ' -Wl,--gc-sections,-Map=rt-thread.map,-cref,-u,Reset_Handler -T board/linker_scripts/link.lds'
 
@@ -57,11 +57,15 @@ if PLATFORM == 'gcc':
     else:
         CFLAGS += ' -O2'
 
+    CXXFLAGS = CFLAGS 
+    CFLAGS += ' -std=c99'
+
     POST_ACTION = OBJCPY + ' -O binary $TARGET rtthread.bin\n' + SIZE + ' $TARGET \n'
 
 elif PLATFORM == 'armcc':
     # toolchains
     CC = 'armcc'
+    CXX = 'armcc'
     AS = 'armasm'
     AR = 'armar'
     LINK = 'armlink'
@@ -85,11 +89,15 @@ elif PLATFORM == 'armcc':
     else:
         CFLAGS += ' -O2'
 
+    CXXFLAGS = CFLAGS 
+    CFLAGS += ' -std=c99'
+
     POST_ACTION = 'fromelf --bin $TARGET --output rtthread.bin \nfromelf -z $TARGET'
 
 elif PLATFORM == 'iar':
     # toolchains
     CC = 'iccarm'
+    CXX = 'iccarm'
     AS = 'iasmarm'
     AR = 'iarchive'
     LINK = 'ilinkarm'
@@ -130,5 +138,7 @@ elif PLATFORM == 'iar':
     LFLAGS = ' --config "board/linker_scripts/link.icf"'
     LFLAGS += ' --entry __iar_program_start'
 
+    CXXFLAGS = CFLAGS
+    
     EXEC_PATH = EXEC_PATH + '/arm/bin/'
     POST_ACTION = 'ielftool --bin $TARGET rtthread.bin'