diff --git a/bsp/renesas/ebf_qi_min_6m5/SConstruct b/bsp/renesas/ebf_qi_min_6m5/SConstruct
index 67511e3048..57d44892c4 100644
--- a/bsp/renesas/ebf_qi_min_6m5/SConstruct
+++ b/bsp/renesas/ebf_qi_min_6m5/SConstruct
@@ -45,6 +45,10 @@ Export('SDK_LIB')
 
 rtconfig.BSP_LIBRARY_TYPE = None
 
+def startup_check():
+    import startup_check
+    startup_check.startup_check()
+
 # prepare building environment
 objs = PrepareBuilding(env, RTT_ROOT, has_libcpu=False)
 
diff --git a/bsp/renesas/ebf_qi_min_6m5/ra/fsp/src/bsp/cmsis/Device/RENESAS/Source/startup.c b/bsp/renesas/ebf_qi_min_6m5/ra/fsp/src/bsp/cmsis/Device/RENESAS/Source/startup.c
index d135ed0762..54124cbcf3 100644
--- a/bsp/renesas/ebf_qi_min_6m5/ra/fsp/src/bsp/cmsis/Device/RENESAS/Source/startup.c
+++ b/bsp/renesas/ebf_qi_min_6m5/ra/fsp/src/bsp/cmsis/Device/RENESAS/Source/startup.c
@@ -64,7 +64,12 @@ void Reset_Handler (void)
     SystemInit();
 
     /* Call user application. */
+#ifdef __ARMCC_VERSION
     main();
+#elif defined(__GNUC__)
+    extern int entry(void);
+    entry();
+#endif
 
     while (1)
     {
diff --git a/bsp/renesas/ebf_qi_min_6m5/startup_check.py b/bsp/renesas/ebf_qi_min_6m5/startup_check.py
new file mode 100644
index 0000000000..6eeae016f5
--- /dev/null
+++ b/bsp/renesas/ebf_qi_min_6m5/startup_check.py
@@ -0,0 +1,62 @@
+import subprocess
+import sys
+
+def check_git_exists():
+    try:
+        # Check if Git is installed
+        subprocess.call(["git", "--version"], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    except OSError:
+        return False
+    return True
+
+def install_git():
+    if sys.version_info[0] == 2:
+        version_cmd = subprocess.call
+    else:
+        version_cmd = subprocess.run
+
+    # Install Git based on the operating system type
+    system = sys.platform.lower()
+    if "linux" in system:
+        version_cmd(["sudo", "apt-get", "install", "git"])
+    elif "darwin" in system:
+        version_cmd(["brew", "install", "git"])
+    elif "win" in system:
+        print("Please manually install Git and ensure it is added to the system PATH.")
+        sys.exit(1)
+
+def check_file_changes(filepath):
+    # Use Git to check the file status
+    result = subprocess.Popen(["git", "status", "--porcelain", filepath], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    out, _ = result.communicate()
+
+    # Return True if the file has changes
+    return bool(out.decode('utf-8'))
+
+def revert_to_original(filepath):
+    # Use Git to revert the file to its original state
+    subprocess.call(["git", "checkout", filepath])
+
+def startup_check():
+    file_path = "ra/fsp/src/bsp/cmsis/Device/RENESAS/Source/startup.c"
+    python_executable = 'python' if sys.version_info[0] == 2 else 'python3'
+
+    # Check if Git is installed, if not, try to install it
+    if not check_git_exists():
+        print("Git not detected, attempting to install...")
+        install_git()
+
+    # Check if Git is installed after the installation attempt
+    if not check_git_exists():
+        print("Git installation failed. Please manually install Git and add it to the system PATH.")
+        sys.exit(1)
+
+    # Check if the file has changes
+    if check_file_changes(file_path):
+        # If changes are detected, revert the file to its original state
+        revert_to_original(file_path)
+    # else:
+    #     print "File {file_path} is unchanged."
+
+if __name__ == "__main__":
+    startup_check()
diff --git a/bsp/renesas/ra2l1-cpk/SConstruct b/bsp/renesas/ra2l1-cpk/SConstruct
index 67511e3048..91489ff888 100644
--- a/bsp/renesas/ra2l1-cpk/SConstruct
+++ b/bsp/renesas/ra2l1-cpk/SConstruct
@@ -45,6 +45,12 @@ Export('SDK_LIB')
 
 rtconfig.BSP_LIBRARY_TYPE = None
 
+def startup_check():
+    import startup_check
+    startup_check.startup_check()
+
+RegisterPreBuildingAction(startup_check)
+
 # prepare building environment
 objs = PrepareBuilding(env, RTT_ROOT, has_libcpu=False)
 
diff --git a/bsp/renesas/ra2l1-cpk/startup_check.py b/bsp/renesas/ra2l1-cpk/startup_check.py
new file mode 100644
index 0000000000..6eeae016f5
--- /dev/null
+++ b/bsp/renesas/ra2l1-cpk/startup_check.py
@@ -0,0 +1,62 @@
+import subprocess
+import sys
+
+def check_git_exists():
+    try:
+        # Check if Git is installed
+        subprocess.call(["git", "--version"], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    except OSError:
+        return False
+    return True
+
+def install_git():
+    if sys.version_info[0] == 2:
+        version_cmd = subprocess.call
+    else:
+        version_cmd = subprocess.run
+
+    # Install Git based on the operating system type
+    system = sys.platform.lower()
+    if "linux" in system:
+        version_cmd(["sudo", "apt-get", "install", "git"])
+    elif "darwin" in system:
+        version_cmd(["brew", "install", "git"])
+    elif "win" in system:
+        print("Please manually install Git and ensure it is added to the system PATH.")
+        sys.exit(1)
+
+def check_file_changes(filepath):
+    # Use Git to check the file status
+    result = subprocess.Popen(["git", "status", "--porcelain", filepath], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    out, _ = result.communicate()
+
+    # Return True if the file has changes
+    return bool(out.decode('utf-8'))
+
+def revert_to_original(filepath):
+    # Use Git to revert the file to its original state
+    subprocess.call(["git", "checkout", filepath])
+
+def startup_check():
+    file_path = "ra/fsp/src/bsp/cmsis/Device/RENESAS/Source/startup.c"
+    python_executable = 'python' if sys.version_info[0] == 2 else 'python3'
+
+    # Check if Git is installed, if not, try to install it
+    if not check_git_exists():
+        print("Git not detected, attempting to install...")
+        install_git()
+
+    # Check if Git is installed after the installation attempt
+    if not check_git_exists():
+        print("Git installation failed. Please manually install Git and add it to the system PATH.")
+        sys.exit(1)
+
+    # Check if the file has changes
+    if check_file_changes(file_path):
+        # If changes are detected, revert the file to its original state
+        revert_to_original(file_path)
+    # else:
+    #     print "File {file_path} is unchanged."
+
+if __name__ == "__main__":
+    startup_check()
diff --git a/bsp/renesas/ra4m2-eco/SConstruct b/bsp/renesas/ra4m2-eco/SConstruct
index 67511e3048..57d44892c4 100644
--- a/bsp/renesas/ra4m2-eco/SConstruct
+++ b/bsp/renesas/ra4m2-eco/SConstruct
@@ -45,6 +45,10 @@ Export('SDK_LIB')
 
 rtconfig.BSP_LIBRARY_TYPE = None
 
+def startup_check():
+    import startup_check
+    startup_check.startup_check()
+
 # prepare building environment
 objs = PrepareBuilding(env, RTT_ROOT, has_libcpu=False)
 
diff --git a/bsp/renesas/ra4m2-eco/ra/fsp/src/bsp/cmsis/Device/RENESAS/Source/startup.c b/bsp/renesas/ra4m2-eco/ra/fsp/src/bsp/cmsis/Device/RENESAS/Source/startup.c
index 7fc7f0a514..a031aae886 100644
--- a/bsp/renesas/ra4m2-eco/ra/fsp/src/bsp/cmsis/Device/RENESAS/Source/startup.c
+++ b/bsp/renesas/ra4m2-eco/ra/fsp/src/bsp/cmsis/Device/RENESAS/Source/startup.c
@@ -64,7 +64,12 @@ void Reset_Handler (void)
     SystemInit();
 
     /* Call user application. */
+#ifdef __ARMCC_VERSION
     main();
+#elif defined(__GNUC__)
+    extern int entry(void);
+    entry();
+#endif
 
     while (1)
     {
diff --git a/bsp/renesas/ra4m2-eco/startup_check.py b/bsp/renesas/ra4m2-eco/startup_check.py
new file mode 100644
index 0000000000..6eeae016f5
--- /dev/null
+++ b/bsp/renesas/ra4m2-eco/startup_check.py
@@ -0,0 +1,62 @@
+import subprocess
+import sys
+
+def check_git_exists():
+    try:
+        # Check if Git is installed
+        subprocess.call(["git", "--version"], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    except OSError:
+        return False
+    return True
+
+def install_git():
+    if sys.version_info[0] == 2:
+        version_cmd = subprocess.call
+    else:
+        version_cmd = subprocess.run
+
+    # Install Git based on the operating system type
+    system = sys.platform.lower()
+    if "linux" in system:
+        version_cmd(["sudo", "apt-get", "install", "git"])
+    elif "darwin" in system:
+        version_cmd(["brew", "install", "git"])
+    elif "win" in system:
+        print("Please manually install Git and ensure it is added to the system PATH.")
+        sys.exit(1)
+
+def check_file_changes(filepath):
+    # Use Git to check the file status
+    result = subprocess.Popen(["git", "status", "--porcelain", filepath], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    out, _ = result.communicate()
+
+    # Return True if the file has changes
+    return bool(out.decode('utf-8'))
+
+def revert_to_original(filepath):
+    # Use Git to revert the file to its original state
+    subprocess.call(["git", "checkout", filepath])
+
+def startup_check():
+    file_path = "ra/fsp/src/bsp/cmsis/Device/RENESAS/Source/startup.c"
+    python_executable = 'python' if sys.version_info[0] == 2 else 'python3'
+
+    # Check if Git is installed, if not, try to install it
+    if not check_git_exists():
+        print("Git not detected, attempting to install...")
+        install_git()
+
+    # Check if Git is installed after the installation attempt
+    if not check_git_exists():
+        print("Git installation failed. Please manually install Git and add it to the system PATH.")
+        sys.exit(1)
+
+    # Check if the file has changes
+    if check_file_changes(file_path):
+        # If changes are detected, revert the file to its original state
+        revert_to_original(file_path)
+    # else:
+    #     print "File {file_path} is unchanged."
+
+if __name__ == "__main__":
+    startup_check()
diff --git a/bsp/renesas/ra6m3-ek/SConstruct b/bsp/renesas/ra6m3-ek/SConstruct
index 67511e3048..91489ff888 100644
--- a/bsp/renesas/ra6m3-ek/SConstruct
+++ b/bsp/renesas/ra6m3-ek/SConstruct
@@ -45,6 +45,12 @@ Export('SDK_LIB')
 
 rtconfig.BSP_LIBRARY_TYPE = None
 
+def startup_check():
+    import startup_check
+    startup_check.startup_check()
+
+RegisterPreBuildingAction(startup_check)
+
 # prepare building environment
 objs = PrepareBuilding(env, RTT_ROOT, has_libcpu=False)
 
diff --git a/bsp/renesas/ra6m3-ek/startup_check.py b/bsp/renesas/ra6m3-ek/startup_check.py
new file mode 100644
index 0000000000..6eeae016f5
--- /dev/null
+++ b/bsp/renesas/ra6m3-ek/startup_check.py
@@ -0,0 +1,62 @@
+import subprocess
+import sys
+
+def check_git_exists():
+    try:
+        # Check if Git is installed
+        subprocess.call(["git", "--version"], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    except OSError:
+        return False
+    return True
+
+def install_git():
+    if sys.version_info[0] == 2:
+        version_cmd = subprocess.call
+    else:
+        version_cmd = subprocess.run
+
+    # Install Git based on the operating system type
+    system = sys.platform.lower()
+    if "linux" in system:
+        version_cmd(["sudo", "apt-get", "install", "git"])
+    elif "darwin" in system:
+        version_cmd(["brew", "install", "git"])
+    elif "win" in system:
+        print("Please manually install Git and ensure it is added to the system PATH.")
+        sys.exit(1)
+
+def check_file_changes(filepath):
+    # Use Git to check the file status
+    result = subprocess.Popen(["git", "status", "--porcelain", filepath], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    out, _ = result.communicate()
+
+    # Return True if the file has changes
+    return bool(out.decode('utf-8'))
+
+def revert_to_original(filepath):
+    # Use Git to revert the file to its original state
+    subprocess.call(["git", "checkout", filepath])
+
+def startup_check():
+    file_path = "ra/fsp/src/bsp/cmsis/Device/RENESAS/Source/startup.c"
+    python_executable = 'python' if sys.version_info[0] == 2 else 'python3'
+
+    # Check if Git is installed, if not, try to install it
+    if not check_git_exists():
+        print("Git not detected, attempting to install...")
+        install_git()
+
+    # Check if Git is installed after the installation attempt
+    if not check_git_exists():
+        print("Git installation failed. Please manually install Git and add it to the system PATH.")
+        sys.exit(1)
+
+    # Check if the file has changes
+    if check_file_changes(file_path):
+        # If changes are detected, revert the file to its original state
+        revert_to_original(file_path)
+    # else:
+    #     print "File {file_path} is unchanged."
+
+if __name__ == "__main__":
+    startup_check()
diff --git a/bsp/renesas/ra6m3-hmi-board/SConstruct b/bsp/renesas/ra6m3-hmi-board/SConstruct
index 67511e3048..91489ff888 100644
--- a/bsp/renesas/ra6m3-hmi-board/SConstruct
+++ b/bsp/renesas/ra6m3-hmi-board/SConstruct
@@ -45,6 +45,12 @@ Export('SDK_LIB')
 
 rtconfig.BSP_LIBRARY_TYPE = None
 
+def startup_check():
+    import startup_check
+    startup_check.startup_check()
+
+RegisterPreBuildingAction(startup_check)
+
 # prepare building environment
 objs = PrepareBuilding(env, RTT_ROOT, has_libcpu=False)
 
diff --git a/bsp/renesas/ra6m3-hmi-board/startup_check.py b/bsp/renesas/ra6m3-hmi-board/startup_check.py
new file mode 100644
index 0000000000..6eeae016f5
--- /dev/null
+++ b/bsp/renesas/ra6m3-hmi-board/startup_check.py
@@ -0,0 +1,62 @@
+import subprocess
+import sys
+
+def check_git_exists():
+    try:
+        # Check if Git is installed
+        subprocess.call(["git", "--version"], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    except OSError:
+        return False
+    return True
+
+def install_git():
+    if sys.version_info[0] == 2:
+        version_cmd = subprocess.call
+    else:
+        version_cmd = subprocess.run
+
+    # Install Git based on the operating system type
+    system = sys.platform.lower()
+    if "linux" in system:
+        version_cmd(["sudo", "apt-get", "install", "git"])
+    elif "darwin" in system:
+        version_cmd(["brew", "install", "git"])
+    elif "win" in system:
+        print("Please manually install Git and ensure it is added to the system PATH.")
+        sys.exit(1)
+
+def check_file_changes(filepath):
+    # Use Git to check the file status
+    result = subprocess.Popen(["git", "status", "--porcelain", filepath], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    out, _ = result.communicate()
+
+    # Return True if the file has changes
+    return bool(out.decode('utf-8'))
+
+def revert_to_original(filepath):
+    # Use Git to revert the file to its original state
+    subprocess.call(["git", "checkout", filepath])
+
+def startup_check():
+    file_path = "ra/fsp/src/bsp/cmsis/Device/RENESAS/Source/startup.c"
+    python_executable = 'python' if sys.version_info[0] == 2 else 'python3'
+
+    # Check if Git is installed, if not, try to install it
+    if not check_git_exists():
+        print("Git not detected, attempting to install...")
+        install_git()
+
+    # Check if Git is installed after the installation attempt
+    if not check_git_exists():
+        print("Git installation failed. Please manually install Git and add it to the system PATH.")
+        sys.exit(1)
+
+    # Check if the file has changes
+    if check_file_changes(file_path):
+        # If changes are detected, revert the file to its original state
+        revert_to_original(file_path)
+    # else:
+    #     print "File {file_path} is unchanged."
+
+if __name__ == "__main__":
+    startup_check()
diff --git a/bsp/renesas/ra6m4-cpk/SConstruct b/bsp/renesas/ra6m4-cpk/SConstruct
index 67511e3048..91489ff888 100644
--- a/bsp/renesas/ra6m4-cpk/SConstruct
+++ b/bsp/renesas/ra6m4-cpk/SConstruct
@@ -45,6 +45,12 @@ Export('SDK_LIB')
 
 rtconfig.BSP_LIBRARY_TYPE = None
 
+def startup_check():
+    import startup_check
+    startup_check.startup_check()
+
+RegisterPreBuildingAction(startup_check)
+
 # prepare building environment
 objs = PrepareBuilding(env, RTT_ROOT, has_libcpu=False)
 
diff --git a/bsp/renesas/ra6m4-cpk/startup_check.py b/bsp/renesas/ra6m4-cpk/startup_check.py
new file mode 100644
index 0000000000..6eeae016f5
--- /dev/null
+++ b/bsp/renesas/ra6m4-cpk/startup_check.py
@@ -0,0 +1,62 @@
+import subprocess
+import sys
+
+def check_git_exists():
+    try:
+        # Check if Git is installed
+        subprocess.call(["git", "--version"], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    except OSError:
+        return False
+    return True
+
+def install_git():
+    if sys.version_info[0] == 2:
+        version_cmd = subprocess.call
+    else:
+        version_cmd = subprocess.run
+
+    # Install Git based on the operating system type
+    system = sys.platform.lower()
+    if "linux" in system:
+        version_cmd(["sudo", "apt-get", "install", "git"])
+    elif "darwin" in system:
+        version_cmd(["brew", "install", "git"])
+    elif "win" in system:
+        print("Please manually install Git and ensure it is added to the system PATH.")
+        sys.exit(1)
+
+def check_file_changes(filepath):
+    # Use Git to check the file status
+    result = subprocess.Popen(["git", "status", "--porcelain", filepath], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    out, _ = result.communicate()
+
+    # Return True if the file has changes
+    return bool(out.decode('utf-8'))
+
+def revert_to_original(filepath):
+    # Use Git to revert the file to its original state
+    subprocess.call(["git", "checkout", filepath])
+
+def startup_check():
+    file_path = "ra/fsp/src/bsp/cmsis/Device/RENESAS/Source/startup.c"
+    python_executable = 'python' if sys.version_info[0] == 2 else 'python3'
+
+    # Check if Git is installed, if not, try to install it
+    if not check_git_exists():
+        print("Git not detected, attempting to install...")
+        install_git()
+
+    # Check if Git is installed after the installation attempt
+    if not check_git_exists():
+        print("Git installation failed. Please manually install Git and add it to the system PATH.")
+        sys.exit(1)
+
+    # Check if the file has changes
+    if check_file_changes(file_path):
+        # If changes are detected, revert the file to its original state
+        revert_to_original(file_path)
+    # else:
+    #     print "File {file_path} is unchanged."
+
+if __name__ == "__main__":
+    startup_check()
diff --git a/bsp/renesas/ra6m4-iot/SConstruct b/bsp/renesas/ra6m4-iot/SConstruct
index 67511e3048..91489ff888 100644
--- a/bsp/renesas/ra6m4-iot/SConstruct
+++ b/bsp/renesas/ra6m4-iot/SConstruct
@@ -45,6 +45,12 @@ Export('SDK_LIB')
 
 rtconfig.BSP_LIBRARY_TYPE = None
 
+def startup_check():
+    import startup_check
+    startup_check.startup_check()
+
+RegisterPreBuildingAction(startup_check)
+
 # prepare building environment
 objs = PrepareBuilding(env, RTT_ROOT, has_libcpu=False)
 
diff --git a/bsp/renesas/ra6m4-iot/startup_check.py b/bsp/renesas/ra6m4-iot/startup_check.py
new file mode 100644
index 0000000000..6eeae016f5
--- /dev/null
+++ b/bsp/renesas/ra6m4-iot/startup_check.py
@@ -0,0 +1,62 @@
+import subprocess
+import sys
+
+def check_git_exists():
+    try:
+        # Check if Git is installed
+        subprocess.call(["git", "--version"], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    except OSError:
+        return False
+    return True
+
+def install_git():
+    if sys.version_info[0] == 2:
+        version_cmd = subprocess.call
+    else:
+        version_cmd = subprocess.run
+
+    # Install Git based on the operating system type
+    system = sys.platform.lower()
+    if "linux" in system:
+        version_cmd(["sudo", "apt-get", "install", "git"])
+    elif "darwin" in system:
+        version_cmd(["brew", "install", "git"])
+    elif "win" in system:
+        print("Please manually install Git and ensure it is added to the system PATH.")
+        sys.exit(1)
+
+def check_file_changes(filepath):
+    # Use Git to check the file status
+    result = subprocess.Popen(["git", "status", "--porcelain", filepath], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    out, _ = result.communicate()
+
+    # Return True if the file has changes
+    return bool(out.decode('utf-8'))
+
+def revert_to_original(filepath):
+    # Use Git to revert the file to its original state
+    subprocess.call(["git", "checkout", filepath])
+
+def startup_check():
+    file_path = "ra/fsp/src/bsp/cmsis/Device/RENESAS/Source/startup.c"
+    python_executable = 'python' if sys.version_info[0] == 2 else 'python3'
+
+    # Check if Git is installed, if not, try to install it
+    if not check_git_exists():
+        print("Git not detected, attempting to install...")
+        install_git()
+
+    # Check if Git is installed after the installation attempt
+    if not check_git_exists():
+        print("Git installation failed. Please manually install Git and add it to the system PATH.")
+        sys.exit(1)
+
+    # Check if the file has changes
+    if check_file_changes(file_path):
+        # If changes are detected, revert the file to its original state
+        revert_to_original(file_path)
+    # else:
+    #     print "File {file_path} is unchanged."
+
+if __name__ == "__main__":
+    startup_check()
diff --git a/bsp/renesas/ra8d1-ek/SConstruct b/bsp/renesas/ra8d1-ek/SConstruct
index 67511e3048..91489ff888 100644
--- a/bsp/renesas/ra8d1-ek/SConstruct
+++ b/bsp/renesas/ra8d1-ek/SConstruct
@@ -45,6 +45,12 @@ Export('SDK_LIB')
 
 rtconfig.BSP_LIBRARY_TYPE = None
 
+def startup_check():
+    import startup_check
+    startup_check.startup_check()
+
+RegisterPreBuildingAction(startup_check)
+
 # prepare building environment
 objs = PrepareBuilding(env, RTT_ROOT, has_libcpu=False)
 
diff --git a/bsp/renesas/ra8d1-ek/ra/fsp/src/bsp/cmsis/Device/RENESAS/Source/startup.c b/bsp/renesas/ra8d1-ek/ra/fsp/src/bsp/cmsis/Device/RENESAS/Source/startup.c
index d135ed0762..54124cbcf3 100644
--- a/bsp/renesas/ra8d1-ek/ra/fsp/src/bsp/cmsis/Device/RENESAS/Source/startup.c
+++ b/bsp/renesas/ra8d1-ek/ra/fsp/src/bsp/cmsis/Device/RENESAS/Source/startup.c
@@ -64,7 +64,12 @@ void Reset_Handler (void)
     SystemInit();
 
     /* Call user application. */
+#ifdef __ARMCC_VERSION
     main();
+#elif defined(__GNUC__)
+    extern int entry(void);
+    entry();
+#endif
 
     while (1)
     {
diff --git a/bsp/renesas/ra8d1-ek/rtconfig.py b/bsp/renesas/ra8d1-ek/rtconfig.py
index 51a4958c83..a87ae8d064 100644
--- a/bsp/renesas/ra8d1-ek/rtconfig.py
+++ b/bsp/renesas/ra8d1-ek/rtconfig.py
@@ -4,7 +4,7 @@ import sys
 # toolchains options
 ARCH='arm'
 CPU='cortex-m85'
-CROSS_TOOL='keil'
+CROSS_TOOL='gcc'
 
 if os.getenv('RTT_CC'):
     CROSS_TOOL = os.getenv('RTT_CC')
diff --git a/bsp/renesas/ra8d1-ek/startup_check.py b/bsp/renesas/ra8d1-ek/startup_check.py
new file mode 100644
index 0000000000..6eeae016f5
--- /dev/null
+++ b/bsp/renesas/ra8d1-ek/startup_check.py
@@ -0,0 +1,62 @@
+import subprocess
+import sys
+
+def check_git_exists():
+    try:
+        # Check if Git is installed
+        subprocess.call(["git", "--version"], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    except OSError:
+        return False
+    return True
+
+def install_git():
+    if sys.version_info[0] == 2:
+        version_cmd = subprocess.call
+    else:
+        version_cmd = subprocess.run
+
+    # Install Git based on the operating system type
+    system = sys.platform.lower()
+    if "linux" in system:
+        version_cmd(["sudo", "apt-get", "install", "git"])
+    elif "darwin" in system:
+        version_cmd(["brew", "install", "git"])
+    elif "win" in system:
+        print("Please manually install Git and ensure it is added to the system PATH.")
+        sys.exit(1)
+
+def check_file_changes(filepath):
+    # Use Git to check the file status
+    result = subprocess.Popen(["git", "status", "--porcelain", filepath], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    out, _ = result.communicate()
+
+    # Return True if the file has changes
+    return bool(out.decode('utf-8'))
+
+def revert_to_original(filepath):
+    # Use Git to revert the file to its original state
+    subprocess.call(["git", "checkout", filepath])
+
+def startup_check():
+    file_path = "ra/fsp/src/bsp/cmsis/Device/RENESAS/Source/startup.c"
+    python_executable = 'python' if sys.version_info[0] == 2 else 'python3'
+
+    # Check if Git is installed, if not, try to install it
+    if not check_git_exists():
+        print("Git not detected, attempting to install...")
+        install_git()
+
+    # Check if Git is installed after the installation attempt
+    if not check_git_exists():
+        print("Git installation failed. Please manually install Git and add it to the system PATH.")
+        sys.exit(1)
+
+    # Check if the file has changes
+    if check_file_changes(file_path):
+        # If changes are detected, revert the file to its original state
+        revert_to_original(file_path)
+    # else:
+    #     print "File {file_path} is unchanged."
+
+if __name__ == "__main__":
+    startup_check()
diff --git a/bsp/renesas/ra8m1-ek/SConstruct b/bsp/renesas/ra8m1-ek/SConstruct
index 67511e3048..91489ff888 100644
--- a/bsp/renesas/ra8m1-ek/SConstruct
+++ b/bsp/renesas/ra8m1-ek/SConstruct
@@ -45,6 +45,12 @@ Export('SDK_LIB')
 
 rtconfig.BSP_LIBRARY_TYPE = None
 
+def startup_check():
+    import startup_check
+    startup_check.startup_check()
+
+RegisterPreBuildingAction(startup_check)
+
 # prepare building environment
 objs = PrepareBuilding(env, RTT_ROOT, has_libcpu=False)
 
diff --git a/bsp/renesas/ra8m1-ek/rtconfig.py b/bsp/renesas/ra8m1-ek/rtconfig.py
index 51a4958c83..a87ae8d064 100644
--- a/bsp/renesas/ra8m1-ek/rtconfig.py
+++ b/bsp/renesas/ra8m1-ek/rtconfig.py
@@ -4,7 +4,7 @@ import sys
 # toolchains options
 ARCH='arm'
 CPU='cortex-m85'
-CROSS_TOOL='keil'
+CROSS_TOOL='gcc'
 
 if os.getenv('RTT_CC'):
     CROSS_TOOL = os.getenv('RTT_CC')
diff --git a/bsp/renesas/ra8m1-ek/startup_check.py b/bsp/renesas/ra8m1-ek/startup_check.py
new file mode 100644
index 0000000000..6eeae016f5
--- /dev/null
+++ b/bsp/renesas/ra8m1-ek/startup_check.py
@@ -0,0 +1,62 @@
+import subprocess
+import sys
+
+def check_git_exists():
+    try:
+        # Check if Git is installed
+        subprocess.call(["git", "--version"], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    except OSError:
+        return False
+    return True
+
+def install_git():
+    if sys.version_info[0] == 2:
+        version_cmd = subprocess.call
+    else:
+        version_cmd = subprocess.run
+
+    # Install Git based on the operating system type
+    system = sys.platform.lower()
+    if "linux" in system:
+        version_cmd(["sudo", "apt-get", "install", "git"])
+    elif "darwin" in system:
+        version_cmd(["brew", "install", "git"])
+    elif "win" in system:
+        print("Please manually install Git and ensure it is added to the system PATH.")
+        sys.exit(1)
+
+def check_file_changes(filepath):
+    # Use Git to check the file status
+    result = subprocess.Popen(["git", "status", "--porcelain", filepath], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    out, _ = result.communicate()
+
+    # Return True if the file has changes
+    return bool(out.decode('utf-8'))
+
+def revert_to_original(filepath):
+    # Use Git to revert the file to its original state
+    subprocess.call(["git", "checkout", filepath])
+
+def startup_check():
+    file_path = "ra/fsp/src/bsp/cmsis/Device/RENESAS/Source/startup.c"
+    python_executable = 'python' if sys.version_info[0] == 2 else 'python3'
+
+    # Check if Git is installed, if not, try to install it
+    if not check_git_exists():
+        print("Git not detected, attempting to install...")
+        install_git()
+
+    # Check if Git is installed after the installation attempt
+    if not check_git_exists():
+        print("Git installation failed. Please manually install Git and add it to the system PATH.")
+        sys.exit(1)
+
+    # Check if the file has changes
+    if check_file_changes(file_path):
+        # If changes are detected, revert the file to its original state
+        revert_to_original(file_path)
+    # else:
+    #     print "File {file_path} is unchanged."
+
+if __name__ == "__main__":
+    startup_check()