diff --git a/libcpu/SConscript b/libcpu/SConscript
index 7ac8e79e53..d295c7d2ae 100644
--- a/libcpu/SConscript
+++ b/libcpu/SConscript
@@ -1,21 +1,21 @@
-Import('env')
-Import('rtconfig')
-Import('RTT_ROOT')
-
-comm = rtconfig.ARCH + '/common'
-path = rtconfig.ARCH + '/' + rtconfig.CPU
-
-# The set of source files associated with this SConscript file.
-if rtconfig.PLATFORM == 'armcc':
-	src_local = Glob(path + '/*.c') + Glob(path + '/*_rvds.s') + Glob(comm + '/*.c')
-
-if rtconfig.PLATFORM == 'gcc':
-	src_local = Glob(path + '/*.c') + Glob(path + '/*_gcc.s') + Glob(comm + '/*.c') + Glob(path + '/*_init.S')
-
-if rtconfig.PLATFORM == 'iar':
-	src_local = Glob(path + '/*.c') + Glob(path + '/*_iar.s') + Glob(comm + '/*.c')
-
-env.Append(CPPPATH = [RTT_ROOT + '/libcpu/' + rtconfig.ARCH + '/' + rtconfig.CPU])
-obj = env.Object(src_local)
-
-Return('obj')
+Import('env')
+Import('rtconfig')
+Import('RTT_ROOT')
+
+comm = rtconfig.ARCH + '/common'
+path = rtconfig.ARCH + '/' + rtconfig.CPU
+
+# The set of source files associated with this SConscript file.
+if rtconfig.PLATFORM == 'armcc':
+	src_local = Glob(path + '/*.c') + Glob(path + '/*_rvds.S') + Glob(comm + '/*.c')
+
+if rtconfig.PLATFORM == 'gcc':
+	src_local = Glob(path + '/*.c') + Glob(path + '/*_gcc.S') + Glob(comm + '/*.c') + Glob(path + '/*_init.S')
+
+if rtconfig.PLATFORM == 'iar':
+	src_local = Glob(path + '/*.c') + Glob(path + '/*_iar.S') + Glob(comm + '/*.c')
+
+env.Append(CPPPATH = [RTT_ROOT + '/libcpu/' + rtconfig.ARCH + '/' + rtconfig.CPU])
+obj = env.Object(src_local)
+
+Return('obj')
diff --git a/libcpu/arm/lm3s/start_gcc.s b/libcpu/arm/lm3s/start_gcc.S
similarity index 100%
rename from libcpu/arm/lm3s/start_gcc.s
rename to libcpu/arm/lm3s/start_gcc.S
diff --git a/libcpu/arm/lpc214x/context_rvds.s b/libcpu/arm/lpc214x/context_rvds.S
similarity index 100%
rename from libcpu/arm/lpc214x/context_rvds.s
rename to libcpu/arm/lpc214x/context_rvds.S
diff --git a/libcpu/arm/lpc214x/start_rvds.s b/libcpu/arm/lpc214x/start_rvds.S
similarity index 100%
rename from libcpu/arm/lpc214x/start_rvds.s
rename to libcpu/arm/lpc214x/start_rvds.S
diff --git a/libcpu/arm/lpc24xx/context_rvds.s b/libcpu/arm/lpc24xx/context_rvds.S
similarity index 100%
rename from libcpu/arm/lpc24xx/context_rvds.s
rename to libcpu/arm/lpc24xx/context_rvds.S
diff --git a/libcpu/arm/lpc24xx/start_rvds.s b/libcpu/arm/lpc24xx/start_rvds.S
similarity index 100%
rename from libcpu/arm/lpc24xx/start_rvds.s
rename to libcpu/arm/lpc24xx/start_rvds.S
diff --git a/libcpu/arm/s3c24x0/context_rvds.s b/libcpu/arm/s3c24x0/context_rvds.S
similarity index 100%
rename from libcpu/arm/s3c24x0/context_rvds.s
rename to libcpu/arm/s3c24x0/context_rvds.S
diff --git a/libcpu/arm/s3c24x0/start_gcc.s b/libcpu/arm/s3c24x0/start_gcc.S
similarity index 100%
rename from libcpu/arm/s3c24x0/start_gcc.s
rename to libcpu/arm/s3c24x0/start_gcc.S
diff --git a/libcpu/arm/s3c24x0/start_rvds.s b/libcpu/arm/s3c24x0/start_rvds.S
similarity index 100%
rename from libcpu/arm/s3c24x0/start_rvds.s
rename to libcpu/arm/s3c24x0/start_rvds.S
diff --git a/libcpu/arm/s3c44b0/context_rvds.s b/libcpu/arm/s3c44b0/context_rvds.S
similarity index 100%
rename from libcpu/arm/s3c44b0/context_rvds.s
rename to libcpu/arm/s3c44b0/context_rvds.S
diff --git a/libcpu/arm/s3c44b0/start_rvds.s b/libcpu/arm/s3c44b0/start_rvds.S
similarity index 100%
rename from libcpu/arm/s3c44b0/start_rvds.s
rename to libcpu/arm/s3c44b0/start_rvds.S
diff --git a/libcpu/arm/stm32/start_gcc.s b/libcpu/arm/stm32/start_gcc.S
similarity index 100%
rename from libcpu/arm/stm32/start_gcc.s
rename to libcpu/arm/stm32/start_gcc.S
diff --git a/libcpu/arm/stm32/start_iar.s b/libcpu/arm/stm32/start_iar.S
similarity index 100%
rename from libcpu/arm/stm32/start_iar.s
rename to libcpu/arm/stm32/start_iar.S
diff --git a/libcpu/arm/stm32/start_rvds.s b/libcpu/arm/stm32/start_rvds.S
similarity index 100%
rename from libcpu/arm/stm32/start_rvds.s
rename to libcpu/arm/stm32/start_rvds.S