diff --git a/bsp/CME_M7/rtconfig.py b/bsp/CME_M7/rtconfig.py
index 57d162ffd2..ebaa7dc334 100644
--- a/bsp/CME_M7/rtconfig.py
+++ b/bsp/CME_M7/rtconfig.py
@@ -35,7 +35,7 @@ if PLATFORM == 'gcc':
     AS = PREFIX + 'gcc'
     AR = PREFIX + 'ar'
     LINK = PREFIX + 'gcc'
-    TARGET_EXT = 'axf'
+    TARGET_EXT = 'elf'
     SIZE = PREFIX + 'size'
     OBJDUMP = PREFIX + 'objdump'
     OBJCPY = PREFIX + 'objcopy'
diff --git a/bsp/apollo2/rtconfig.py b/bsp/apollo2/rtconfig.py
index 354e5f6389..90adde5435 100644
--- a/bsp/apollo2/rtconfig.py
+++ b/bsp/apollo2/rtconfig.py
@@ -35,7 +35,7 @@ if PLATFORM == 'gcc':
     AS = PREFIX + 'gcc'
     AR = PREFIX + 'ar'
     LINK = PREFIX + 'gcc'
-    TARGET_EXT = 'axf'
+    TARGET_EXT = 'elf'
     SIZE = PREFIX + 'size'
     OBJDUMP = PREFIX + 'objdump'
     OBJCPY = PREFIX + 'objcopy'
diff --git a/bsp/asm9260t/rtconfig.py b/bsp/asm9260t/rtconfig.py
index 4206291364..2a7b809133 100644
--- a/bsp/asm9260t/rtconfig.py
+++ b/bsp/asm9260t/rtconfig.py
@@ -39,7 +39,7 @@ if PLATFORM == 'gcc':
     AS = PREFIX + 'gcc'
     AR = PREFIX + 'ar'
     LINK = PREFIX + 'gcc'
-    TARGET_EXT = 'axf'
+    TARGET_EXT = 'elf'
     SIZE = PREFIX + 'size'
     OBJDUMP = PREFIX + 'objdump'
     OBJCPY = PREFIX + 'objcopy'
diff --git a/bsp/at91sam9260/rtconfig.py b/bsp/at91sam9260/rtconfig.py
index 264e605399..fe64534a71 100755
--- a/bsp/at91sam9260/rtconfig.py
+++ b/bsp/at91sam9260/rtconfig.py
@@ -37,7 +37,7 @@ if PLATFORM == 'gcc':
     AS = PREFIX + 'gcc'
     AR = PREFIX + 'ar'
     LINK = PREFIX + 'gcc'
-    TARGET_EXT = 'axf'
+    TARGET_EXT = 'elf'
     SIZE = PREFIX + 'size'
     OBJDUMP = PREFIX + 'objdump'
     OBJCPY = PREFIX + 'objcopy'
diff --git a/bsp/dm365/rtconfig.py b/bsp/dm365/rtconfig.py
index 5cba9d13d9..0b699be2eb 100644
--- a/bsp/dm365/rtconfig.py
+++ b/bsp/dm365/rtconfig.py
@@ -25,7 +25,7 @@ if PLATFORM == 'gcc':
     AS = PREFIX + 'gcc'
     AR = PREFIX + 'ar'
     LINK = PREFIX + 'gcc'
-    TARGET_EXT = 'axf'
+    TARGET_EXT = 'elf'
     SIZE = PREFIX + 'size'
     OBJDUMP = PREFIX + 'objdump'
     OBJCPY = PREFIX + 'objcopy'
diff --git a/bsp/efm32/rtconfig.py b/bsp/efm32/rtconfig.py
index b1bd8330bb..d1a44f9289 100644
--- a/bsp/efm32/rtconfig.py
+++ b/bsp/efm32/rtconfig.py
@@ -52,7 +52,7 @@ if PLATFORM == 'gcc':
     AS = PREFIX + 'gcc'
     AR = PREFIX + 'ar'
     LINK = PREFIX + 'gcc'
-    TARGET_EXT = 'axf'
+    TARGET_EXT = 'elf'
     SIZE = PREFIX + 'size'
     OBJDUMP = PREFIX + 'objdump'
     OBJCPY = PREFIX + 'objcopy'
diff --git a/bsp/frdm-k64f/rtconfig.py b/bsp/frdm-k64f/rtconfig.py
index 009b4b71fb..ff874e791e 100644
--- a/bsp/frdm-k64f/rtconfig.py
+++ b/bsp/frdm-k64f/rtconfig.py
@@ -34,7 +34,7 @@ if PLATFORM == 'gcc':
     AS = PREFIX + 'gcc'
     AR = PREFIX + 'ar'
     LINK = PREFIX + 'gcc'
-    TARGET_EXT = 'axf'
+    TARGET_EXT = 'elf'
     SIZE = PREFIX + 'size'
     OBJDUMP = PREFIX + 'objdump'
     OBJCPY = PREFIX + 'objcopy'
diff --git a/bsp/hifive1/rtconfig.py b/bsp/hifive1/rtconfig.py
index 6ace0388d8..4c49fa631b 100644
--- a/bsp/hifive1/rtconfig.py
+++ b/bsp/hifive1/rtconfig.py
@@ -31,7 +31,7 @@ if PLATFORM == 'gcc':
     AS = PREFIX + 'gcc'
     AR = PREFIX + 'ar'
     LINK = PREFIX + 'gcc'
-    TARGET_EXT = 'axf'
+    TARGET_EXT = 'elf'
     SIZE = PREFIX + 'size'
     OBJDUMP = PREFIX + 'objdump'
     OBJCPY = PREFIX + 'objcopy'
diff --git a/bsp/imxrt1052-evk/rtconfig.py b/bsp/imxrt1052-evk/rtconfig.py
index a138dcb984..8df0ecb78a 100644
--- a/bsp/imxrt1052-evk/rtconfig.py
+++ b/bsp/imxrt1052-evk/rtconfig.py
@@ -34,7 +34,7 @@ if PLATFORM == 'gcc':
     AS = PREFIX + 'gcc'
     AR = PREFIX + 'ar'
     LINK = PREFIX + 'gcc'
-    TARGET_EXT = 'axf'
+    TARGET_EXT = 'elf'
     SIZE = PREFIX + 'size'
     OBJDUMP = PREFIX + 'objdump'
     OBJCPY = PREFIX + 'objcopy'
diff --git a/bsp/lm3s8962/rtconfig.py b/bsp/lm3s8962/rtconfig.py
index 829120bd3a..73f678f28a 100644
--- a/bsp/lm3s8962/rtconfig.py
+++ b/bsp/lm3s8962/rtconfig.py
@@ -35,7 +35,7 @@ if PLATFORM == 'gcc':
     AS = PREFIX + 'gcc'
     AR = PREFIX + 'ar'
     LINK = PREFIX + 'gcc'
-    TARGET_EXT = 'axf'
+    TARGET_EXT = 'elf'
     SIZE = PREFIX + 'size'
     OBJDUMP = PREFIX + 'objdump'
     OBJCPY = PREFIX + 'objcopy'
diff --git a/bsp/lm3s9b9x/rtconfig.py b/bsp/lm3s9b9x/rtconfig.py
index d9c51ac722..7269e3853c 100644
--- a/bsp/lm3s9b9x/rtconfig.py
+++ b/bsp/lm3s9b9x/rtconfig.py
@@ -35,7 +35,7 @@ if PLATFORM == 'gcc':
     AS = PREFIX + 'gcc'
     AR = PREFIX + 'ar'
     LINK = PREFIX + 'gcc'
-    TARGET_EXT = 'axf'
+    TARGET_EXT = 'elf'
     SIZE = PREFIX + 'size'
     OBJDUMP = PREFIX + 'objdump'
     OBJCPY = PREFIX + 'objcopy'
diff --git a/bsp/lm4f232/rtconfig.py b/bsp/lm4f232/rtconfig.py
index 5e6075ead5..8a082a2df4 100644
--- a/bsp/lm4f232/rtconfig.py
+++ b/bsp/lm4f232/rtconfig.py
@@ -37,7 +37,7 @@ if PLATFORM == 'gcc':
     AS = PREFIX + 'gcc'
     AR = PREFIX + 'ar'
     LINK = PREFIX + 'gcc'
-    TARGET_EXT = 'axf'
+    TARGET_EXT = 'elf'
     SIZE = PREFIX + 'size'
     OBJDUMP = PREFIX + 'objdump'
     OBJCPY = PREFIX + 'objcopy'
diff --git a/bsp/lpc178x/rtconfig.py b/bsp/lpc178x/rtconfig.py
index a5302bb36f..06f70506e0 100644
--- a/bsp/lpc178x/rtconfig.py
+++ b/bsp/lpc178x/rtconfig.py
@@ -32,7 +32,7 @@ if PLATFORM == 'gcc':
     AS = PREFIX + 'gcc'
     AR = PREFIX + 'ar'
     LINK = PREFIX + 'gcc'
-    TARGET_EXT = 'axf'
+    TARGET_EXT = 'elf'
     SIZE = PREFIX + 'size'
     OBJDUMP = PREFIX + 'objdump'
     OBJCPY = PREFIX + 'objcopy'
diff --git a/bsp/lpc2148/rtconfig.py b/bsp/lpc2148/rtconfig.py
index 57f7ee46da..95e0c18e45 100644
--- a/bsp/lpc2148/rtconfig.py
+++ b/bsp/lpc2148/rtconfig.py
@@ -33,7 +33,7 @@ if PLATFORM == 'gcc':
     AS = PREFIX + 'gcc'
     AR = PREFIX + 'ar'
     LINK = PREFIX + 'gcc'
-    TARGET_EXT = 'axf'
+    TARGET_EXT = 'elf'
     SIZE = PREFIX + 'size'
     OBJDUMP = PREFIX + 'objdump'
     OBJCPY = PREFIX + 'objcopy'
diff --git a/bsp/lpc2478/rtconfig.py b/bsp/lpc2478/rtconfig.py
index 7464fa0dc4..1622ed54cc 100644
--- a/bsp/lpc2478/rtconfig.py
+++ b/bsp/lpc2478/rtconfig.py
@@ -33,7 +33,7 @@ if PLATFORM == 'gcc':
     AS = PREFIX + 'gcc'
     AR = PREFIX + 'ar'
     LINK = PREFIX + 'gcc'
-    TARGET_EXT = 'axf'
+    TARGET_EXT = 'elf'
     SIZE = PREFIX + 'size'
     OBJDUMP = PREFIX + 'objdump'
     OBJCPY = PREFIX + 'objcopy'
diff --git a/bsp/lpc43xx/M4/rtconfig.py b/bsp/lpc43xx/M4/rtconfig.py
index 1cbaacf650..6f35501fdc 100644
--- a/bsp/lpc43xx/M4/rtconfig.py
+++ b/bsp/lpc43xx/M4/rtconfig.py
@@ -44,7 +44,7 @@ if PLATFORM == 'gcc':
     AS = PREFIX + 'gcc'
     AR = PREFIX + 'ar'
     LINK = PREFIX + 'gcc'
-    TARGET_EXT = 'axf'
+    TARGET_EXT = 'elf'
     SIZE = PREFIX + 'size'
     OBJDUMP = PREFIX + 'objdump'
     OBJCPY = PREFIX + 'objcopy'
diff --git a/bsp/lpc824/rtconfig.py b/bsp/lpc824/rtconfig.py
index 906729dfb9..70a75bffd7 100644
--- a/bsp/lpc824/rtconfig.py
+++ b/bsp/lpc824/rtconfig.py
@@ -34,7 +34,7 @@ if PLATFORM == 'gcc':
     AS = PREFIX + 'gcc'
     AR = PREFIX + 'ar'
     LINK = PREFIX + 'gcc'
-    TARGET_EXT = 'axf'
+    TARGET_EXT = 'elf'
     SIZE = PREFIX + 'size'
     OBJDUMP = PREFIX + 'objdump'
     OBJCPY = PREFIX + 'objcopy'
diff --git a/bsp/mb9bf500r/rtconfig.py b/bsp/mb9bf500r/rtconfig.py
index af787b72c3..f194c68386 100644
--- a/bsp/mb9bf500r/rtconfig.py
+++ b/bsp/mb9bf500r/rtconfig.py
@@ -33,7 +33,7 @@ if PLATFORM == 'gcc':
     AS = PREFIX + 'gcc'
     AR = PREFIX + 'ar'
     LINK = PREFIX + 'gcc'
-    TARGET_EXT = 'axf'
+    TARGET_EXT = 'elf'
     SIZE = PREFIX + 'size'
     OBJDUMP = PREFIX + 'objdump'
     OBJCPY = PREFIX + 'objcopy'
diff --git a/bsp/mb9bf506r/rtconfig.py b/bsp/mb9bf506r/rtconfig.py
index 233253c934..ac4859e91c 100644
--- a/bsp/mb9bf506r/rtconfig.py
+++ b/bsp/mb9bf506r/rtconfig.py
@@ -33,7 +33,7 @@ if PLATFORM == 'gcc':
     AS = PREFIX + 'gcc'
     AR = PREFIX + 'ar'
     LINK = PREFIX + 'gcc'
-    TARGET_EXT = 'axf'
+    TARGET_EXT = 'elf'
     SIZE = PREFIX + 'size'
     OBJDUMP = PREFIX + 'objdump'
     OBJCPY = PREFIX + 'objcopy'
diff --git a/bsp/mb9bf618s/rtconfig.py b/bsp/mb9bf618s/rtconfig.py
index 5a21a70555..9bb51b95f9 100644
--- a/bsp/mb9bf618s/rtconfig.py
+++ b/bsp/mb9bf618s/rtconfig.py
@@ -38,7 +38,7 @@ if PLATFORM == 'gcc':
     AS = PREFIX + 'gcc'
     AR = PREFIX + 'ar'
     LINK = PREFIX + 'gcc'
-    TARGET_EXT = 'axf'
+    TARGET_EXT = 'elf'
     SIZE = PREFIX + 'size'
     OBJDUMP = PREFIX + 'objdump'
     OBJCPY = PREFIX + 'objcopy'
diff --git a/bsp/mini2440/rtconfig.py b/bsp/mini2440/rtconfig.py
index 969cd7fa82..dd574acb16 100644
--- a/bsp/mini2440/rtconfig.py
+++ b/bsp/mini2440/rtconfig.py
@@ -39,7 +39,7 @@ if PLATFORM == 'gcc':
     AS = PREFIX + 'gcc'
     AR = PREFIX + 'ar'
     LINK = PREFIX + 'gcc'
-    TARGET_EXT = 'axf'
+    TARGET_EXT = 'elf'
     SIZE = PREFIX + 'size'
     OBJDUMP = PREFIX + 'objdump'
     OBJCPY = PREFIX + 'objcopy'
diff --git a/bsp/mini4020/rtconfig.py b/bsp/mini4020/rtconfig.py
index be8e4535c7..8b949202d1 100644
--- a/bsp/mini4020/rtconfig.py
+++ b/bsp/mini4020/rtconfig.py
@@ -36,7 +36,7 @@ if PLATFORM == 'gcc':
     AS = PREFIX + 'gcc'
     AR = PREFIX + 'ar'
     LINK = PREFIX + 'gcc'
-    TARGET_EXT = 'axf'
+    TARGET_EXT = 'elf'
     SIZE = PREFIX + 'size'
     OBJDUMP = PREFIX + 'objdump'
     OBJCPY = PREFIX + 'objcopy'
diff --git a/bsp/nrf51822/rtconfig.py b/bsp/nrf51822/rtconfig.py
index 654730708e..bad289d12d 100644
--- a/bsp/nrf51822/rtconfig.py
+++ b/bsp/nrf51822/rtconfig.py
@@ -35,7 +35,7 @@ if PLATFORM == 'gcc':
     AS = PREFIX + 'gcc'
     AR = PREFIX + 'ar'
     LINK = PREFIX + 'gcc'
-    TARGET_EXT = 'axf'
+    TARGET_EXT = 'elf'
     SIZE = PREFIX + 'size'
     OBJDUMP = PREFIX + 'objdump'
     OBJCPY = PREFIX + 'objcopy'
diff --git a/bsp/nrf52832/rtconfig.py b/bsp/nrf52832/rtconfig.py
index 1775b4ab4b..562a3bfe41 100644
--- a/bsp/nrf52832/rtconfig.py
+++ b/bsp/nrf52832/rtconfig.py
@@ -35,7 +35,7 @@ if PLATFORM == 'gcc':
     AS = PREFIX + 'gcc'
     AR = PREFIX + 'ar'
     LINK = PREFIX + 'gcc'
-    TARGET_EXT = 'axf'
+    TARGET_EXT = 'elf'
     SIZE = PREFIX + 'size'
     OBJDUMP = PREFIX + 'objdump'
     OBJCPY = PREFIX + 'objcopy'
diff --git a/bsp/nuvoton_nuc472/rtconfig.py b/bsp/nuvoton_nuc472/rtconfig.py
index a26d433eda..291a90f26b 100644
--- a/bsp/nuvoton_nuc472/rtconfig.py
+++ b/bsp/nuvoton_nuc472/rtconfig.py
@@ -33,7 +33,7 @@ if PLATFORM == 'gcc':
     AS = PREFIX + 'gcc'
     AR = PREFIX + 'ar'
     LINK = PREFIX + 'g++'
-    TARGET_EXT = 'axf'
+    TARGET_EXT = 'elf'
     SIZE = PREFIX + 'size'
     OBJDUMP = PREFIX + 'objdump'
     OBJCPY = PREFIX + 'objcopy'
diff --git a/bsp/nv32f100x/rtconfig.py b/bsp/nv32f100x/rtconfig.py
index bf568e19b7..2306ae23f6 100644
--- a/bsp/nv32f100x/rtconfig.py
+++ b/bsp/nv32f100x/rtconfig.py
@@ -38,7 +38,7 @@ if PLATFORM == 'gcc':
     AS = PREFIX + 'gcc'
     AR = PREFIX + 'ar'
     LINK = PREFIX + 'gcc'
-    TARGET_EXT = 'axf'
+    TARGET_EXT = 'elf'
     SIZE = PREFIX + 'size'
     OBJDUMP = PREFIX + 'objdump'
     OBJCPY = PREFIX + 'objcopy'
diff --git a/bsp/sam7x/rtconfig.py b/bsp/sam7x/rtconfig.py
index 761c1b9b6f..2a3c76adde 100644
--- a/bsp/sam7x/rtconfig.py
+++ b/bsp/sam7x/rtconfig.py
@@ -34,7 +34,7 @@ if PLATFORM == 'gcc':
     AS = PREFIX + 'gcc'
     AR = PREFIX + 'ar'
     LINK = PREFIX + 'gcc'
-    TARGET_EXT = 'axf'
+    TARGET_EXT = 'elf'
     SIZE = PREFIX + 'size'
     OBJDUMP = PREFIX + 'objdump'
     OBJCPY = PREFIX + 'objcopy'
diff --git a/bsp/samd21/rtconfig.py b/bsp/samd21/rtconfig.py
index 9b4743a20c..af3ca84f5d 100644
--- a/bsp/samd21/rtconfig.py
+++ b/bsp/samd21/rtconfig.py
@@ -39,7 +39,7 @@ if PLATFORM == 'gcc':
     AS = PREFIX + 'gcc'
     AR = PREFIX + 'ar'
     LINK = PREFIX + 'gcc'
-    TARGET_EXT = 'axf'
+    TARGET_EXT = 'elf'
     SIZE = PREFIX + 'size'
     OBJDUMP = PREFIX + 'objdump'
     OBJCPY = PREFIX + 'objcopy'
diff --git a/bsp/simulator/rtconfig.py b/bsp/simulator/rtconfig.py
index 8eae0db7fa..8fcbcebd00 100755
--- a/bsp/simulator/rtconfig.py
+++ b/bsp/simulator/rtconfig.py
@@ -43,7 +43,7 @@ if PLATFORM == 'gcc':
     AS = PREFIX + 'gcc'
     AR = PREFIX + 'ar'
     LINK = PREFIX + 'gcc'
-    TARGET_EXT = 'axf'
+    TARGET_EXT = 'elf'
     SIZE = PREFIX + 'size'
     OBJDUMP = PREFIX + 'objdump'
     OBJCPY = PREFIX + 'objcopy'
diff --git a/bsp/stm32f0x/rtconfig.py b/bsp/stm32f0x/rtconfig.py
index 659b664723..9de2ab0f81 100644
--- a/bsp/stm32f0x/rtconfig.py
+++ b/bsp/stm32f0x/rtconfig.py
@@ -36,7 +36,7 @@ if PLATFORM == 'gcc':
     AS = PREFIX + 'gcc'
     AR = PREFIX + 'ar'
     LINK = PREFIX + 'gcc'
-    TARGET_EXT = 'axf'
+    TARGET_EXT = 'elf'
     SIZE = PREFIX + 'size'
     OBJDUMP = PREFIX + 'objdump'
     OBJCPY = PREFIX + 'objcopy'
diff --git a/bsp/stm32f107/rtconfig.py b/bsp/stm32f107/rtconfig.py
index 864e36247d..9fb35a9d8b 100644
--- a/bsp/stm32f107/rtconfig.py
+++ b/bsp/stm32f107/rtconfig.py
@@ -34,7 +34,7 @@ if PLATFORM == 'gcc':
     AS = PREFIX + 'gcc'
     AR = PREFIX + 'ar'
     LINK = PREFIX + 'gcc'
-    TARGET_EXT = 'axf'
+    TARGET_EXT = 'elf'
     SIZE = PREFIX + 'size'
     OBJDUMP = PREFIX + 'objdump'
     OBJCPY = PREFIX + 'objcopy'
diff --git a/bsp/stm32f10x-HAL/rtconfig.py b/bsp/stm32f10x-HAL/rtconfig.py
index 87ab8293b0..ea15f07054 100644
--- a/bsp/stm32f10x-HAL/rtconfig.py
+++ b/bsp/stm32f10x-HAL/rtconfig.py
@@ -34,7 +34,7 @@ if PLATFORM == 'gcc':
     AS = PREFIX + 'gcc'
     AR = PREFIX + 'ar'
     LINK = PREFIX + 'gcc'
-    TARGET_EXT = 'axf'
+    TARGET_EXT = 'elf'
     SIZE = PREFIX + 'size'
     OBJDUMP = PREFIX + 'objdump'
     OBJCPY = PREFIX + 'objcopy'
diff --git a/bsp/stm32f10x/rtconfig.py b/bsp/stm32f10x/rtconfig.py
index 973b3a696d..f4d2a34a06 100644
--- a/bsp/stm32f10x/rtconfig.py
+++ b/bsp/stm32f10x/rtconfig.py
@@ -45,7 +45,7 @@ if PLATFORM == 'gcc':
     AS = PREFIX + 'gcc'
     AR = PREFIX + 'ar'
     LINK = PREFIX + 'gcc'
-    TARGET_EXT = 'axf'
+    TARGET_EXT = 'elf'
     SIZE = PREFIX + 'size'
     OBJDUMP = PREFIX + 'objdump'
     OBJCPY = PREFIX + 'objcopy'
diff --git a/bsp/stm32f20x/rtconfig.py b/bsp/stm32f20x/rtconfig.py
index d035e1b05e..9d06b66a97 100644
--- a/bsp/stm32f20x/rtconfig.py
+++ b/bsp/stm32f20x/rtconfig.py
@@ -30,7 +30,7 @@ if PLATFORM == 'gcc':
     AS = PREFIX + 'gcc'
     AR = PREFIX + 'ar'
     LINK = PREFIX + 'gcc'
-    TARGET_EXT = 'axf'
+    TARGET_EXT = 'elf'
     SIZE = PREFIX + 'size'
     OBJDUMP = PREFIX + 'objdump'
     OBJCPY = PREFIX + 'objcopy'
diff --git a/bsp/stm32f40x/rtconfig.py b/bsp/stm32f40x/rtconfig.py
index 1df6020628..67edfca299 100644
--- a/bsp/stm32f40x/rtconfig.py
+++ b/bsp/stm32f40x/rtconfig.py
@@ -35,7 +35,7 @@ if PLATFORM == 'gcc':
     AS = PREFIX + 'gcc'
     AR = PREFIX + 'ar'
     LINK = PREFIX + 'gcc'
-    TARGET_EXT = 'axf'
+    TARGET_EXT = 'elf'
     SIZE = PREFIX + 'size'
     OBJDUMP = PREFIX + 'objdump'
     OBJCPY = PREFIX + 'objcopy'
diff --git a/bsp/stm32f411-nucleo/rtconfig.py b/bsp/stm32f411-nucleo/rtconfig.py
index bc321a339b..e9d8cc55f7 100644
--- a/bsp/stm32f411-nucleo/rtconfig.py
+++ b/bsp/stm32f411-nucleo/rtconfig.py
@@ -38,7 +38,7 @@ if PLATFORM == 'gcc':
     AS = PREFIX + 'gcc'
     AR = PREFIX + 'ar'
     LINK = PREFIX + 'gcc'
-    TARGET_EXT = 'axf'
+    TARGET_EXT = 'elf'
     SIZE = PREFIX + 'size'
     OBJDUMP = PREFIX + 'objdump'
     OBJCPY = PREFIX + 'objcopy'
diff --git a/bsp/stm32f429-apollo/rtconfig.py b/bsp/stm32f429-apollo/rtconfig.py
index 527c955239..29b5209d0e 100644
--- a/bsp/stm32f429-apollo/rtconfig.py
+++ b/bsp/stm32f429-apollo/rtconfig.py
@@ -36,7 +36,7 @@ if PLATFORM == 'gcc':
     AR = PREFIX + 'ar'
     CXX = PREFIX + 'g++'
     LINK = PREFIX + 'gcc'
-    TARGET_EXT = 'axf'
+    TARGET_EXT = 'elf'
     SIZE = PREFIX + 'size'
     OBJDUMP = PREFIX + 'objdump'
     OBJCPY = PREFIX + 'objcopy'
diff --git a/bsp/stm32f429-armfly/rtconfig.py b/bsp/stm32f429-armfly/rtconfig.py
index ece5a363fb..769465e7a8 100644
--- a/bsp/stm32f429-armfly/rtconfig.py
+++ b/bsp/stm32f429-armfly/rtconfig.py
@@ -38,7 +38,7 @@ if PLATFORM == 'gcc':
     AR = PREFIX + 'ar'
     CXX = PREFIX + 'g++'
     LINK = PREFIX + 'gcc'
-    TARGET_EXT = 'axf'
+    TARGET_EXT = 'elf'
     SIZE = PREFIX + 'size'
     OBJDUMP = PREFIX + 'objdump'
     OBJCPY = PREFIX + 'objcopy'
diff --git a/bsp/stm32f429-disco/rtconfig.py b/bsp/stm32f429-disco/rtconfig.py
index 40d5f3c805..ab2222b943 100644
--- a/bsp/stm32f429-disco/rtconfig.py
+++ b/bsp/stm32f429-disco/rtconfig.py
@@ -35,7 +35,7 @@ if PLATFORM == 'gcc':
     AS = PREFIX + 'gcc'
     AR = PREFIX + 'ar'
     LINK = PREFIX + 'gcc'
-    TARGET_EXT = 'axf'
+    TARGET_EXT = 'elf'
     SIZE = PREFIX + 'size'
     OBJDUMP = PREFIX + 'objdump'
     OBJCPY = PREFIX + 'objcopy'
diff --git a/bsp/stm32f4xx-HAL/rtconfig.py b/bsp/stm32f4xx-HAL/rtconfig.py
index 39e739f835..c036761317 100644
--- a/bsp/stm32f4xx-HAL/rtconfig.py
+++ b/bsp/stm32f4xx-HAL/rtconfig.py
@@ -38,7 +38,7 @@ if PLATFORM == 'gcc':
     AS = PREFIX + 'gcc'
     AR = PREFIX + 'ar'
     LINK = PREFIX + 'gcc'
-    TARGET_EXT = 'axf'
+    TARGET_EXT = 'elf'
     SIZE = PREFIX + 'size'
     OBJDUMP = PREFIX + 'objdump'
     OBJCPY = PREFIX + 'objcopy'
diff --git a/bsp/stm32f7-disco/rtconfig.py b/bsp/stm32f7-disco/rtconfig.py
index 0741e1931c..4fb5865f3d 100644
--- a/bsp/stm32f7-disco/rtconfig.py
+++ b/bsp/stm32f7-disco/rtconfig.py
@@ -36,7 +36,7 @@ if PLATFORM == 'gcc':
     AS = PREFIX + 'gcc'
     AR = PREFIX + 'ar'
     LINK = PREFIX + 'gcc'
-    TARGET_EXT = 'axf'
+    TARGET_EXT = 'elf'
     SIZE = PREFIX + 'size'
     OBJDUMP = PREFIX + 'objdump'
     OBJCPY = PREFIX + 'objcopy'
diff --git a/bsp/stm32h743-nucleo/rtconfig.py b/bsp/stm32h743-nucleo/rtconfig.py
index 5561337520..ed5e8e9c25 100644
--- a/bsp/stm32h743-nucleo/rtconfig.py
+++ b/bsp/stm32h743-nucleo/rtconfig.py
@@ -36,7 +36,7 @@ if PLATFORM == 'gcc':
     AS = PREFIX + 'gcc'
     AR = PREFIX + 'ar'
     LINK = PREFIX + 'gcc'
-    TARGET_EXT = 'axf'
+    TARGET_EXT = 'elf'
     SIZE = PREFIX + 'size'
     OBJDUMP = PREFIX + 'objdump'
     OBJCPY = PREFIX + 'objcopy'
diff --git a/bsp/stm32l072/rtconfig.py b/bsp/stm32l072/rtconfig.py
index 8796a79b60..ca72477a93 100644
--- a/bsp/stm32l072/rtconfig.py
+++ b/bsp/stm32l072/rtconfig.py
@@ -38,7 +38,7 @@ if PLATFORM == 'gcc':
     AS = PREFIX + 'gcc'
     AR = PREFIX + 'ar'
     LINK = PREFIX + 'gcc'
-    TARGET_EXT = 'axf'
+    TARGET_EXT = 'elf'
     SIZE = PREFIX + 'size'
     OBJDUMP = PREFIX + 'objdump'
     OBJCPY = PREFIX + 'objcopy'
diff --git a/bsp/stm32l475-iot-disco/rtconfig.py b/bsp/stm32l475-iot-disco/rtconfig.py
index ece5a363fb..769465e7a8 100644
--- a/bsp/stm32l475-iot-disco/rtconfig.py
+++ b/bsp/stm32l475-iot-disco/rtconfig.py
@@ -38,7 +38,7 @@ if PLATFORM == 'gcc':
     AR = PREFIX + 'ar'
     CXX = PREFIX + 'g++'
     LINK = PREFIX + 'gcc'
-    TARGET_EXT = 'axf'
+    TARGET_EXT = 'elf'
     SIZE = PREFIX + 'size'
     OBJDUMP = PREFIX + 'objdump'
     OBJCPY = PREFIX + 'objcopy'
diff --git a/bsp/stm32l476-nucleo/rtconfig.py b/bsp/stm32l476-nucleo/rtconfig.py
index 43fad6104b..b0c519ef3e 100644
--- a/bsp/stm32l476-nucleo/rtconfig.py
+++ b/bsp/stm32l476-nucleo/rtconfig.py
@@ -38,7 +38,7 @@ if PLATFORM == 'gcc':
     AR = PREFIX + 'ar'
     CXX = PREFIX + 'g++'
     LINK = PREFIX + 'gcc'
-    TARGET_EXT = 'axf'
+    TARGET_EXT = 'elf'
     SIZE = PREFIX + 'size'
     OBJDUMP = PREFIX + 'objdump'
     OBJCPY = PREFIX + 'objcopy'
diff --git a/bsp/tm4c129x/rtconfig.py b/bsp/tm4c129x/rtconfig.py
index 9b8b95a402..79af54998d 100644
--- a/bsp/tm4c129x/rtconfig.py
+++ b/bsp/tm4c129x/rtconfig.py
@@ -39,7 +39,7 @@ if PLATFORM == 'gcc':
     AS = PREFIX + 'gcc'
     AR = PREFIX + 'ar'
     LINK = PREFIX + 'gcc'
-    TARGET_EXT = 'axf'
+    TARGET_EXT = 'elf'
     SIZE = PREFIX + 'size'
     OBJDUMP = PREFIX + 'objdump'
     OBJCPY = PREFIX + 'objcopy'