diff --git a/docs/BUILDING.md b/docs/BUILDING.md
index 68ccb74c33e..f84e3f6460a 100644
--- a/docs/BUILDING.md
+++ b/docs/BUILDING.md
@@ -104,7 +104,6 @@ Compiler               | Mbed SDK Abbreviation | Example Version
 -----------------------|-----------------------|-----------
 Keil ARM Compiler      | ARM, uARM             | ARM C/C++ Compiler, 5.03 [Build 117]
 GCC ARM                | GCC_ARM               | gcc version 4.8.3 20131129 (release)
-GCC CodeSourcery       | GCC_CS                | gcc version 4.8.1 (Sourcery CodeBench Lite 2013.11-24)
 GCC CodeRed            | GCC_CR                | gcc version 4.6.2 20121016 (release)
 IAR Embedded Workbench | IAR                   | IAR ANSI C/C++ Compiler V6.70.1.5641/W32 for ARM
 
@@ -174,9 +173,6 @@ MY_ARM_CLIB = join(ARM_PATH, "lib", "microlib")
 # GCC ARM
 GCC_ARM_PATH = "C:/Work/toolchains/gcc_arm_4_8/4_8_2013q4/bin"
  
-# GCC CodeSourcery
-GCC_CS_PATH = "C:/Work/toolchains/Sourcery_CodeBench_Lite_for_ARM_EABI/bin"
- 
 # GCC CodeRed
 GCC_CR_PATH = "C:/Work/toolchains/LPCXpresso_6.1.4_194/lpcxpresso/tools/bin"
  
@@ -194,17 +190,15 @@ MUTs = {
 Note: You need to provide the absolute path to your compiler(s) installed on your host machine. Replace corresponding variable values with paths to compilers installed in your system:
 * ```ARM_PATH``` for armcc compiler.
 * ```GCC_ARM_PATH``` for GCC ARM compiler.
-* ```GCC_CS_PATH``` for GCC CodeSourcery compiler.
 * ```GCC_CR_PATH``` for GCC CodeRed compiler.
 * ```IAR_PATH``` for IAR compiler. 
 
 If for example you do not use ```IAR``` compiler you do not have to modify anything. Workspace tools will use ```IAR_PATH`` variable only if you explicit ask for it from command line. So do not worry and replace only paths for your installed compilers.
 
-Note: Because this is a Python script and ```ARM_PATH```, ```GCC_ARM_PATH```, ```GCC_CS_PATH```, ```GCC_CR_PATH```, ```IAR_PATH``` are Python string variables please use double backlash or single slash as path's directories delimiter to avoid incorrect path format. For example:
+Note: Because this is a Python script and ```ARM_PATH```, ```GCC_ARM_PATH```, ```GCC_CR_PATH```, ```IAR_PATH``` are Python string variables please use double backlash or single slash as path's directories delimiter to avoid incorrect path format. For example:
 ```python
 ARM_PATH = "C:/Work/toolchains/ARMCompiler_5.03_117_Windows"
 GCC_ARM_PATH = "C:/Work/toolchains/gcc_arm_4_8/4_8_2013q4/bin"
-GCC_CS_PATH = "C:/Work/toolchains/Sourcery_CodeBench_Lite_for_ARM_EABI/bin"
 GCC_CR_PATH = "C:/Work/toolchains/LPCXpresso_6.1.4_194/lpcxpresso/tools/bin"
 IAR_PATH = "C:/Work/toolchains/iar_6_5/arm"
 ```
@@ -263,7 +257,7 @@ Volume serial number is 006C006F 6243:3EA9
 
 Note: Why ```LCP1768```? For this example we are using ```LPC1768``` because this platform supports all compilers so you are sure you only need to specify proper compiler.
 
-If you are not using ARM Compiler replace ```ARM``` with your compiler nickname: ```GCC_ARM```, ```GCC_CS```, ```GCC_CR``` or ```IAR```. For example if you are using IAR type command:
+If you are not using ARM Compiler replace ```ARM``` with your compiler nickname: ```GCC_ARM```, ```GCC_CR``` or ```IAR```. For example if you are using IAR type command:
 ```
 $ python build.py -m LPC1768 -t IAR
 ```
@@ -335,17 +329,17 @@ Build successes:
 * If you’re unsure which platforms and toolchains are supported please use switch ```-S``` to print simple matrix of platform to compiler dependencies.
 ```
 $ python build.py -S
-+-------------------------+-----------+-----------+-----------+-----------+-----------+-----------+------------+---------------+
-| Platform                |    ARM    |    uARM   |  GCC_ARM  |    IAR    |   GCC_CR  |   GCC_CS  | GCC_CW_EWL | GCC_CW_NEWLIB |
-+-------------------------+-----------+-----------+-----------+-----------+-----------+-----------+------------+---------------+
-| APPNEARME_MICRONFCBOARD | Supported |  Default  | Supported |     -     |     -     |     -     |     -      |       -       |
-| ARCH_BLE                |  Default  |     -     | Supported | Supported |     -     |     -     |     -      |       -       |
-| ARCH_GPRS               | Supported |  Default  | Supported | Supported | Supported |     -     |     -      |       -       |
++-------------------------+-----------+-----------+-----------+-----------+-----------+
+| Platform                |    ARM    |    uARM   |  GCC_ARM  |    IAR    |   GCC_CR  |
++-------------------------+-----------+-----------+-----------+-----------+-----------+
+| APPNEARME_MICRONFCBOARD | Supported |  Default  | Supported |     -     |     -     |
+| ARCH_BLE                |  Default  |     -     | Supported | Supported |     -     |
+| ARCH_GPRS               | Supported |  Default  | Supported | Supported | Supported |
 ...
-| UBLOX_C029              | Supported |  Default  | Supported | Supported |     -     |     -     |     -      |       -       |
-| WALLBOT_BLE             |  Default  |     -     | Supported | Supported |     -     |     -     |     -      |       -       |
-| XADOW_M0                | Supported |  Default  | Supported | Supported | Supported |     -     |     -      |       -       |
-+-------------------------+-----------+-----------+-----------+-----------+-----------+-----------+------------+---------------+
+| UBLOX_C029              | Supported |  Default  | Supported | Supported |     -     |
+| WALLBOT_BLE             |  Default  |     -     | Supported | Supported |     -     |
+| XADOW_M0                | Supported |  Default  | Supported | Supported | Supported |
++-------------------------+-----------+-----------+-----------+-----------+-----------+
 *Default - default on-line compiler
 *Supported - supported off-line compiler
 
@@ -356,19 +350,19 @@ Total permutations: 297
 Above list can be overwhelming so please do not hesitate to use switch ```-f``` to filter ```Platform``` column.
 ```
 $ python build.py -S -f ^K
-+--------------+-----------+---------+-----------+-----------+--------+--------+------------+---------------+
-| Platform     |    ARM    |   uARM  |  GCC_ARM  |    IAR    | GCC_CR | GCC_CS | GCC_CW_EWL | GCC_CW_NEWLIB |
-+--------------+-----------+---------+-----------+-----------+--------+--------+------------+---------------+
-| K20D50M      |  Default  |    -    | Supported | Supported |   -    |   -    |     -      |       -       |
-| K22F         |  Default  |    -    | Supported | Supported |   -    |   -    |     -      |       -       |
-| K64F         |  Default  |    -    | Supported | Supported |   -    |   -    |     -      |       -       |
-| KL05Z        | Supported | Default | Supported | Supported |   -    |   -    |     -      |       -       |
-| KL25Z        |  Default  |    -    | Supported | Supported |   -    |   -    | Supported  |   Supported   |
-| KL43Z        |  Default  |    -    | Supported |     -     |   -    |   -    |     -      |       -       |
-| KL46Z        |  Default  |    -    | Supported | Supported |   -    |   -    |     -      |       -       |
-| NRF51_DK     |  Default  |    -    | Supported | Supported |   -    |   -    |     -      |       -       |
-| NRF51_DK_OTA |  Default  |    -    | Supported |     -     |   -    |   -    |     -      |       -       |
-+--------------+-----------+---------+-----------+-----------+--------+--------+------------+---------------+
++--------------+-----------+---------+-----------+-----------+--------+
+| Platform     |    ARM    |   uARM  |  GCC_ARM  |    IAR    | GCC_CR |
++--------------+-----------+---------+-----------+-----------+--------+
+| K20D50M      |  Default  |    -    | Supported | Supported |   -    |
+| K22F         |  Default  |    -    | Supported | Supported |   -    |
+| K64F         |  Default  |    -    | Supported | Supported |   -    |
+| KL05Z        | Supported | Default | Supported | Supported |   -    |
+| KL25Z        |  Default  |    -    | Supported | Supported |   -    |
+| KL43Z        |  Default  |    -    | Supported |     -     |   -    |
+| KL46Z        |  Default  |    -    | Supported | Supported |   -    |
+| NRF51_DK     |  Default  |    -    | Supported | Supported |   -    |
+| NRF51_DK_OTA |  Default  |    -    | Supported |     -     |   -    |
++--------------+-----------+---------+-----------+-----------+--------+
 *Default - default on-line compiler
 *Supported - supported off-line compiler
 
@@ -378,11 +372,11 @@ Total permutations: 28
 or just give platform name:
 ```
 $ python build.py -S -f LPC1768
-+----------+---------+-----------+-----------+-----------+-----------+-----------+------------+---------------+
-| Platform |   ARM   |    uARM   |  GCC_ARM  |    IAR    |   GCC_CR  |   GCC_CS  | GCC_CW_EWL | GCC_CW_NEWLIB |
-+----------+---------+-----------+-----------+-----------+-----------+-----------+------------+---------------+
-| LPC1768  | Default | Supported | Supported | Supported | Supported | Supported |     -      |       -       |
-+----------+---------+-----------+-----------+-----------+-----------+-----------+------------+---------------+
++----------+---------+-----------+-----------+-----------+-----------+
+| Platform |   ARM   |    uARM   |  GCC_ARM  |    IAR    |   GCC_CR  |
++----------+---------+-----------+-----------+-----------+-----------+
+| LPC1768  | Default | Supported | Supported | Supported | Supported |
++----------+---------+-----------+-----------+-----------+-----------+
 *Default - default on-line compiler
 *Supported - supported off-line compiler
 
diff --git a/docs/TESTING.md b/docs/TESTING.md
index dfbd5c0d2e5..76980b4e224 100644
--- a/docs/TESTING.md
+++ b/docs/TESTING.md
@@ -148,7 +148,7 @@ Below we can see how sample ```test_spec.json``` file content could look like. (
 ```json
 {
     "targets": {
-        "LPC1768" : ["ARM", "uARM", "GCC_ARM", "GCC_CS", "GCC_CR", "IAR"],
+        "LPC1768" : ["ARM", "uARM", "GCC_ARM", "GCC_CR", "IAR"],
         "KL25Z" : ["ARM", "GCC_ARM"],
         "NUCLEO_F103RB" : ["ARM", "uARM"]
      }
@@ -156,7 +156,7 @@ Below we can see how sample ```test_spec.json``` file content could look like. (
 ```
 Above example configuration will force tests for LPC1768, KL25Z, NUCLEO_F103RB platforms and:
 
-* Compilers: ```ARM```, ```uARM```, ```GCC_ARM```, ```GCC_CS```, ```GCC_CR``` and ```IAR``` will be used to compile tests for NXP's ```LPC1768```.
+* Compilers: ```ARM```, ```uARM```, ```GCC_ARM```, ```GCC_CR``` and ```IAR``` will be used to compile tests for NXP's ```LPC1768```.
 * Compilers: ```ARM``` and ```GCC_ARM``` will be used for Freescales' ```KL25Z``` platform.
 * Compilers: ```ARM``` and ```uARM``` will be used for STMicro's ```NUCLEO_F103RB``` platform.
 
diff --git a/libraries/mbed/common/retarget.cpp b/libraries/mbed/common/retarget.cpp
index 82411abd21b..14720f785e6 100644
--- a/libraries/mbed/common/retarget.cpp
+++ b/libraries/mbed/common/retarget.cpp
@@ -493,10 +493,7 @@ extern "C" caddr_t _sbrk(int incr) {
 #endif
 
 
-#ifdef TOOLCHAIN_GCC_CW
-// TODO: Ideally, we would like to define directly "_ExitProcess"
-extern "C" void mbed_exit(int return_code) {
-#elif defined TOOLCHAIN_GCC_ARM
+#if defined TOOLCHAIN_GCC_ARM
 extern "C" void _exit(int return_code) {
 #else
 namespace std {
@@ -520,7 +517,7 @@ extern "C" void exit(int return_code) {
     while (1);
 }
 
-#if !defined(TOOLCHAIN_GCC_ARM) && !defined(TOOLCHAIN_GCC_CW)
+#if !defined(TOOLCHAIN_GCC_ARM)
 } //namespace std
 #endif
 
diff --git a/workspace_tools/build_api.py b/workspace_tools/build_api.py
index 2b5f349cee5..13335c2aeca 100644
--- a/workspace_tools/build_api.py
+++ b/workspace_tools/build_api.py
@@ -184,7 +184,7 @@ def build_library(src_paths, build_path, target, toolchain_name,
     """ src_path: the path of the source directory
     build_path: the path of the build directory
     target: ['LPC1768', 'LPC11U24', 'LPC2368']
-    toolchain: ['ARM', 'uARM', 'GCC_ARM', 'GCC_CS', 'GCC_CR']
+    toolchain: ['ARM', 'uARM', 'GCC_ARM', 'GCC_CR']
     library_paths: List of paths to additional libraries
     clean: Rebuild everything if True
     notify: Notify function for logs
diff --git a/workspace_tools/build_release.py b/workspace_tools/build_release.py
index d968404e214..0a3383e96df 100644
--- a/workspace_tools/build_release.py
+++ b/workspace_tools/build_release.py
@@ -31,9 +31,9 @@
 
 OFFICIAL_MBED_LIBRARY_BUILD = (
     ('LPC11U24',     ('ARM', 'uARM', 'GCC_ARM', 'IAR')),
-    ('LPC1768',      ('ARM', 'GCC_ARM', 'GCC_CR', 'GCC_CS', 'IAR')),
-    ('UBLOX_C027',   ('ARM', 'GCC_ARM', 'GCC_CR', 'GCC_CS', 'IAR')),
-    ('ARCH_PRO',     ('ARM', 'GCC_ARM', 'GCC_CR', 'GCC_CS', 'IAR')),
+    ('LPC1768',      ('ARM', 'GCC_ARM', 'GCC_CR', 'IAR')),
+    ('UBLOX_C027',   ('ARM', 'GCC_ARM', 'GCC_CR', 'IAR')),
+    ('ARCH_PRO',     ('ARM', 'GCC_ARM', 'GCC_CR', 'IAR')),
     ('LPC2368',      ('ARM', 'GCC_ARM')),
     ('LPC2460',      ('GCC_ARM',)),
     ('LPC812',       ('uARM','IAR')),
diff --git a/workspace_tools/buildbot/master.cfg b/workspace_tools/buildbot/master.cfg
index e07c3551cf2..0a8a6620ccc 100644
--- a/workspace_tools/buildbot/master.cfg
+++ b/workspace_tools/buildbot/master.cfg
@@ -29,7 +29,7 @@ c['slavePortnum'] = 9989
 ####### OFFICIAL_MBED_LIBRARY_BUILD
 
 OFFICIAL_MBED_LIBRARY_BUILD = (
-    ('LPC1768', ('ARM', 'GCC_ARM', 'GCC_CR', 'GCC_CS', 'IAR')),
+    ('LPC1768', ('ARM', 'GCC_ARM', 'GCC_CR', 'IAR')),
     ('KL05Z', ('ARM', 'uARM', 'GCC_ARM')),
     ('KL25Z', ('ARM', 'GCC_ARM')),
     ('LPC11U24', ('ARM', 'uARM')),
@@ -45,7 +45,7 @@ OFFICIAL_MBED_LIBRARY_BUILD = (
     ('NUCLEO_L152RE', ('ARM', 'uARM')),
     ('NUCLEO_F401RE', ('ARM', 'uARM')),
     ('NUCLEO_F030R8', ('ARM', 'uARM')),
-    ('UBLOX_C027', ('ARM', 'GCC_ARM', 'GCC_CR', 'GCC_CS', 'IAR')),
+    ('UBLOX_C027', ('ARM', 'GCC_ARM', 'GCC_CR', 'IAR')),
     # ('NRF51822', ('ARM',)),
 )
 
diff --git a/workspace_tools/export/codesourcery.py b/workspace_tools/export/codesourcery.py
deleted file mode 100644
index c0146253920..00000000000
--- a/workspace_tools/export/codesourcery.py
+++ /dev/null
@@ -1,60 +0,0 @@
-"""
-mbed SDK
-Copyright (c) 2011-2013 ARM Limited
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-"""
-from exporters import Exporter
-from os.path import splitext, basename
-
-
-class CodeSourcery(Exporter):
-    NAME = 'CodeSourcery'
-    TOOLCHAIN = 'GCC_CS'
-
-    TARGETS = [
-        'LPC1768',
-        'UBLOX_C027',
-        'ARCH_PRO',
-    ]
-
-    DOT_IN_RELATIVE_PATH = True
-
-    def generate(self):
-        # "make" wants Unix paths
-        self.resources.win_to_unix()
-
-        to_be_compiled = []
-        for r_type in ['s_sources', 'c_sources', 'cpp_sources']:
-            r = getattr(self.resources, r_type)
-            if r:
-                for source in r:
-                    base, ext = splitext(source)
-                    to_be_compiled.append(base + '.o')
-
-        libraries = []
-        for lib in self.resources.libraries:
-            l, _ = splitext(basename(lib))
-            libraries.append(l[3:])
-
-        ctx = {
-            'name': self.program_name,
-            'to_be_compiled': to_be_compiled,
-            'object_files': self.resources.objects,
-            'include_paths': self.resources.inc_dirs,
-            'library_paths': self.resources.lib_dirs,
-            'linker_script': self.resources.linker_script,
-            'libraries': libraries,
-            'symbols': self.get_symbols()
-        }
-        self.gen_file('codesourcery_%s.tmpl' % self.target.lower(), ctx, 'Makefile')
diff --git a/workspace_tools/export/codesourcery_arch_pro.tmpl b/workspace_tools/export/codesourcery_arch_pro.tmpl
deleted file mode 100644
index 161bd1b7ba8..00000000000
--- a/workspace_tools/export/codesourcery_arch_pro.tmpl
+++ /dev/null
@@ -1,56 +0,0 @@
-# This file was automagically generated by mbed.org. For more information, 
-# see http://mbed.org/handbook/Exporting-to-CodeSourcery
-
-GCC_BIN = 
-PROJECT = {{name}}
-OBJECTS = {% for f in to_be_compiled %}{{f}} {% endfor %}
-SYS_OBJECTS = {% for f in object_files %}{{f}} {% endfor %}
-INCLUDE_PATHS = {% for p in include_paths %}-I{{p}} {% endfor %}
-LIBRARY_PATHS = {% for p in library_paths %}-L{{p}} {% endfor %}
-LIBRARIES = {% for lib in libraries %}-l{{lib}} {% endfor %}
-LINKER_SCRIPT = {{linker_script}}
-
-############################################################################### 
-CC = $(GCC_BIN)arm-none-eabi-gcc
-CPP = $(GCC_BIN)arm-none-eabi-g++
-CC_FLAGS = -c -g -fno-common -fmessage-length=0 -Wall -fno-exceptions -fno-rtti -mcpu=cortex-m3 -mthumb -ffunction-sections -fdata-sections -fomit-frame-pointer
-ONLY_C_FLAGS = -std=gnu99
-ONLY_CPP_FLAGS = -std=gnu++98
-CC_SYMBOLS = {% for s in symbols %}-D{{s}} {% endfor %}
-
-
-AS = $(GCC_BIN)arm-none-eabi-as
-
-LD = $(GCC_BIN)arm-none-eabi-gcc
-LD_FLAGS = -mcpu=cortex-m3 -mthumb -Wl,--gc-sections
-LD_SYS_LIBS = -lstdc++ -lsupc++ -lm -lc -lgcc
-
-OBJCOPY = $(GCC_BIN)arm-none-eabi-objcopy
-
-ifeq ($(DEBUG), 1)
-  CC_FLAGS += -DDEBUG -O0
-else
-  CC_FLAGS += -DNDEBUG -Os
-endif
-
-all: $(PROJECT).bin
-
-clean:
-	rm -f $(PROJECT).bin $(PROJECT).elf $(OBJECTS)
-
-.s.o:
-	$(AS)  $(CC_FLAGS) $(CC_SYMBOLS) -o $@ $<
-
-.c.o:
-	$(CC)  $(CC_FLAGS) $(CC_SYMBOLS) $(ONLY_C_FLAGS)   $(INCLUDE_PATHS) -o $@ $<
-
-.cpp.o:
-	$(CPP) $(CC_FLAGS) $(CC_SYMBOLS) $(ONLY_CPP_FLAGS) $(INCLUDE_PATHS) -o $@ $<
-
-
-$(PROJECT).elf: $(OBJECTS) $(SYS_OBJECTS)
-	$(LD) $(LD_FLAGS) -T$(LINKER_SCRIPT) $(LIBRARY_PATHS) -o $@ $^ $(LIBRARIES) $(LD_SYS_LIBS) $(LIBRARIES) $(LD_SYS_LIBS)
-
-$(PROJECT).bin: $(PROJECT).elf
-	$(OBJCOPY) -O binary $< $@
-
diff --git a/workspace_tools/export/codesourcery_lpc1768.tmpl b/workspace_tools/export/codesourcery_lpc1768.tmpl
deleted file mode 100644
index 161bd1b7ba8..00000000000
--- a/workspace_tools/export/codesourcery_lpc1768.tmpl
+++ /dev/null
@@ -1,56 +0,0 @@
-# This file was automagically generated by mbed.org. For more information, 
-# see http://mbed.org/handbook/Exporting-to-CodeSourcery
-
-GCC_BIN = 
-PROJECT = {{name}}
-OBJECTS = {% for f in to_be_compiled %}{{f}} {% endfor %}
-SYS_OBJECTS = {% for f in object_files %}{{f}} {% endfor %}
-INCLUDE_PATHS = {% for p in include_paths %}-I{{p}} {% endfor %}
-LIBRARY_PATHS = {% for p in library_paths %}-L{{p}} {% endfor %}
-LIBRARIES = {% for lib in libraries %}-l{{lib}} {% endfor %}
-LINKER_SCRIPT = {{linker_script}}
-
-############################################################################### 
-CC = $(GCC_BIN)arm-none-eabi-gcc
-CPP = $(GCC_BIN)arm-none-eabi-g++
-CC_FLAGS = -c -g -fno-common -fmessage-length=0 -Wall -fno-exceptions -fno-rtti -mcpu=cortex-m3 -mthumb -ffunction-sections -fdata-sections -fomit-frame-pointer
-ONLY_C_FLAGS = -std=gnu99
-ONLY_CPP_FLAGS = -std=gnu++98
-CC_SYMBOLS = {% for s in symbols %}-D{{s}} {% endfor %}
-
-
-AS = $(GCC_BIN)arm-none-eabi-as
-
-LD = $(GCC_BIN)arm-none-eabi-gcc
-LD_FLAGS = -mcpu=cortex-m3 -mthumb -Wl,--gc-sections
-LD_SYS_LIBS = -lstdc++ -lsupc++ -lm -lc -lgcc
-
-OBJCOPY = $(GCC_BIN)arm-none-eabi-objcopy
-
-ifeq ($(DEBUG), 1)
-  CC_FLAGS += -DDEBUG -O0
-else
-  CC_FLAGS += -DNDEBUG -Os
-endif
-
-all: $(PROJECT).bin
-
-clean:
-	rm -f $(PROJECT).bin $(PROJECT).elf $(OBJECTS)
-
-.s.o:
-	$(AS)  $(CC_FLAGS) $(CC_SYMBOLS) -o $@ $<
-
-.c.o:
-	$(CC)  $(CC_FLAGS) $(CC_SYMBOLS) $(ONLY_C_FLAGS)   $(INCLUDE_PATHS) -o $@ $<
-
-.cpp.o:
-	$(CPP) $(CC_FLAGS) $(CC_SYMBOLS) $(ONLY_CPP_FLAGS) $(INCLUDE_PATHS) -o $@ $<
-
-
-$(PROJECT).elf: $(OBJECTS) $(SYS_OBJECTS)
-	$(LD) $(LD_FLAGS) -T$(LINKER_SCRIPT) $(LIBRARY_PATHS) -o $@ $^ $(LIBRARIES) $(LD_SYS_LIBS) $(LIBRARIES) $(LD_SYS_LIBS)
-
-$(PROJECT).bin: $(PROJECT).elf
-	$(OBJCOPY) -O binary $< $@
-
diff --git a/workspace_tools/export/codesourcery_ublox_c027.tmpl b/workspace_tools/export/codesourcery_ublox_c027.tmpl
deleted file mode 100644
index 161bd1b7ba8..00000000000
--- a/workspace_tools/export/codesourcery_ublox_c027.tmpl
+++ /dev/null
@@ -1,56 +0,0 @@
-# This file was automagically generated by mbed.org. For more information, 
-# see http://mbed.org/handbook/Exporting-to-CodeSourcery
-
-GCC_BIN = 
-PROJECT = {{name}}
-OBJECTS = {% for f in to_be_compiled %}{{f}} {% endfor %}
-SYS_OBJECTS = {% for f in object_files %}{{f}} {% endfor %}
-INCLUDE_PATHS = {% for p in include_paths %}-I{{p}} {% endfor %}
-LIBRARY_PATHS = {% for p in library_paths %}-L{{p}} {% endfor %}
-LIBRARIES = {% for lib in libraries %}-l{{lib}} {% endfor %}
-LINKER_SCRIPT = {{linker_script}}
-
-############################################################################### 
-CC = $(GCC_BIN)arm-none-eabi-gcc
-CPP = $(GCC_BIN)arm-none-eabi-g++
-CC_FLAGS = -c -g -fno-common -fmessage-length=0 -Wall -fno-exceptions -fno-rtti -mcpu=cortex-m3 -mthumb -ffunction-sections -fdata-sections -fomit-frame-pointer
-ONLY_C_FLAGS = -std=gnu99
-ONLY_CPP_FLAGS = -std=gnu++98
-CC_SYMBOLS = {% for s in symbols %}-D{{s}} {% endfor %}
-
-
-AS = $(GCC_BIN)arm-none-eabi-as
-
-LD = $(GCC_BIN)arm-none-eabi-gcc
-LD_FLAGS = -mcpu=cortex-m3 -mthumb -Wl,--gc-sections
-LD_SYS_LIBS = -lstdc++ -lsupc++ -lm -lc -lgcc
-
-OBJCOPY = $(GCC_BIN)arm-none-eabi-objcopy
-
-ifeq ($(DEBUG), 1)
-  CC_FLAGS += -DDEBUG -O0
-else
-  CC_FLAGS += -DNDEBUG -Os
-endif
-
-all: $(PROJECT).bin
-
-clean:
-	rm -f $(PROJECT).bin $(PROJECT).elf $(OBJECTS)
-
-.s.o:
-	$(AS)  $(CC_FLAGS) $(CC_SYMBOLS) -o $@ $<
-
-.c.o:
-	$(CC)  $(CC_FLAGS) $(CC_SYMBOLS) $(ONLY_C_FLAGS)   $(INCLUDE_PATHS) -o $@ $<
-
-.cpp.o:
-	$(CPP) $(CC_FLAGS) $(CC_SYMBOLS) $(ONLY_CPP_FLAGS) $(INCLUDE_PATHS) -o $@ $<
-
-
-$(PROJECT).elf: $(OBJECTS) $(SYS_OBJECTS)
-	$(LD) $(LD_FLAGS) -T$(LINKER_SCRIPT) $(LIBRARY_PATHS) -o $@ $^ $(LIBRARIES) $(LD_SYS_LIBS) $(LIBRARIES) $(LD_SYS_LIBS)
-
-$(PROJECT).bin: $(PROJECT).elf
-	$(OBJCOPY) -O binary $< $@
-
diff --git a/workspace_tools/settings.py b/workspace_tools/settings.py
index 9237624cc0a..ef4ef034c04 100644
--- a/workspace_tools/settings.py
+++ b/workspace_tools/settings.py
@@ -53,19 +53,12 @@
 # GCC ARM
 GCC_ARM_PATH = ""
 
-# GCC CodeSourcery
-GCC_CS_PATH = "C:/Program Files (x86)/CodeSourcery/Sourcery_CodeBench_Lite_for_ARM_EABI/bin"
-
 # GCC CodeRed
 GCC_CR_PATH = "C:/code_red/RedSuite_4.2.0_349/redsuite/Tools/bin"
 
 # IAR
 IAR_PATH = "C:/Program Files (x86)/IAR Systems/Embedded Workbench 7.0/arm"
 
-# GCC Code Warrior
-CW_GCC_PATH  = "C:/Freescale/CW MCU v10.3/Cross_Tools/arm-none-eabi-gcc-4_6_2/bin"
-CW_EWL_PATH = "C:/Freescale/CW MCU v10.3/MCU/ARM_GCC_Support/ewl/lib"
-
 # Goanna static analyser. Please overload it in private_settings.py
 GOANNA_PATH = "c:/Program Files (x86)/RedLizards/Goanna Central 3.2.3/bin"
 
diff --git a/workspace_tools/singletest.py b/workspace_tools/singletest.py
index ba9695ac1b2..6b5054baca3 100644
--- a/workspace_tools/singletest.py
+++ b/workspace_tools/singletest.py
@@ -24,7 +24,7 @@
 {
     "targets": {
         "KL46Z": ["ARM", "GCC_ARM"],
-        "LPC1768": ["ARM", "GCC_ARM", "GCC_CR", "GCC_CS", "IAR"],
+        "LPC1768": ["ARM", "GCC_ARM", "GCC_CR", "IAR"],
         "LPC11U24": ["uARM"],
         "NRF51822": ["ARM"]
     }
diff --git a/workspace_tools/size.py b/workspace_tools/size.py
index 233cb961530..48ed5366be7 100644
--- a/workspace_tools/size.py
+++ b/workspace_tools/size.py
@@ -63,7 +63,7 @@ def benchmarks():
     csv_data.writerow(['Toolchain', "Target", "Benchmark", "code", "data", "bss", "flash"])
 
     # Build
-    for toolchain in ['ARM', 'uARM', 'GCC_CR', 'GCC_CS', 'GCC_ARM']:
+    for toolchain in ['ARM', 'uARM', 'GCC_CR', 'GCC_ARM']:
         for mcu in ["LPC1768", "LPC11U24"]:
             # Build Libraries
             build_mbed_libs(mcu, toolchain)
@@ -118,4 +118,4 @@ def compare(t1, t2, target):
 
 
 if __name__ == '__main__':
-    compare("GCC_CR", "GCC_CS", "LPC1768")
+    compare("GCC_CR", "LPC1768")
diff --git a/workspace_tools/targets.py b/workspace_tools/targets.py
index 1416de03204..a83c837839e 100755
--- a/workspace_tools/targets.py
+++ b/workspace_tools/targets.py
@@ -275,7 +275,7 @@ def __init__(self):
         LPCTarget.__init__(self)
         self.core = "Cortex-M3"
         self.extra_labels = ['NXP', 'LPC176X', 'MBED_LPC1768']
-        self.supported_toolchains = ["ARM", "uARM", "GCC_ARM", "GCC_CS", "GCC_CR", "IAR"]
+        self.supported_toolchains = ["ARM", "uARM", "GCC_ARM", "GCC_CR", "IAR"]
         self.detect_code = ["1010"]
         self.progen_target = 'mbed-lpc1768'
 
@@ -284,7 +284,7 @@ def __init__(self):
         LPCTarget.__init__(self)
         self.core = "Cortex-M3"
         self.extra_labels = ['NXP', 'LPC176X']
-        self.supported_toolchains = ["ARM", "uARM", "GCC_ARM", "GCC_CS", "GCC_CR", "IAR"]
+        self.supported_toolchains = ["ARM", "uARM", "GCC_ARM", "GCC_CR", "IAR"]
         self.macros = ['TARGET_LPC1768']
         self.supported_form_factors = ["ARDUINO"]
         self.progen_target ='arch-pro'
@@ -294,7 +294,7 @@ def __init__(self):
         LPCTarget.__init__(self)
         self.core = "Cortex-M3"
         self.extra_labels = ['NXP', 'LPC176X']
-        self.supported_toolchains = ["ARM", "uARM", "GCC_ARM", "GCC_CS", "GCC_CR", "IAR"]
+        self.supported_toolchains = ["ARM", "uARM", "GCC_ARM", "GCC_CR", "IAR"]
         self.macros = ['TARGET_LPC1768']
         self.supported_form_factors = ["ARDUINO"]
         self.progen_target ='ublox-c027'
@@ -304,7 +304,7 @@ def __init__(self):
         LPCTarget.__init__(self)
         self.core = "Cortex-M3"
         self.extra_labels = ['NXP', 'LPC176X', 'XBED_LPC1768']
-        self.supported_toolchains = ["ARM", "uARM", "GCC_ARM", "GCC_CS", "GCC_CR", "IAR"]
+        self.supported_toolchains = ["ARM", "uARM", "GCC_ARM", "GCC_CR", "IAR"]
         self.macros = ['TARGET_LPC1768']
         self.detect_code = ["1010"]
 
@@ -466,7 +466,7 @@ def __init__(self):
         Target.__init__(self)
         self.core = "Cortex-M0+"
         self.extra_labels = ['Freescale', 'KLXX']
-        self.supported_toolchains = ["ARM", "GCC_CW_EWL", "GCC_CW_NEWLIB", "GCC_ARM","IAR"]
+        self.supported_toolchains = ["ARM", "GCC_ARM", "IAR"]
         self.supported_form_factors = ["ARDUINO"]
         self.is_disk_virtual = True
         self.detect_code = ["0200"]
diff --git a/workspace_tools/toolchains/__init__.py b/workspace_tools/toolchains/__init__.py
index 6e9e8c53b84..d79e647aa57 100644
--- a/workspace_tools/toolchains/__init__.py
+++ b/workspace_tools/toolchains/__init__.py
@@ -153,11 +153,11 @@ def __str__(self):
 # had the knowledge of a list of these directories to be ignored.
 LEGACY_IGNORE_DIRS = set([
     'LPC11U24', 'LPC1768', 'LPC2368', 'LPC4088', 'LPC812', 'KL25Z',
-    'ARM', 'GCC_ARM', 'GCC_CR', 'GCC_CS', 'IAR', 'uARM'
+    'ARM', 'GCC_ARM', 'GCC_CR', 'IAR', 'uARM'
 ])
 LEGACY_TOOLCHAIN_NAMES = {
     'ARM_STD':'ARM', 'ARM_MICRO': 'uARM',
-    'GCC_ARM': 'GCC_ARM', 'GCC_CR': 'GCC_CR', 'GCC_CS': 'GCC_CS',
+    'GCC_ARM': 'GCC_ARM', 'GCC_CR': 'GCC_CR',
     'IAR': 'IAR',
 }
 
@@ -740,33 +740,26 @@ def var(self, key, value):
         self.notify({'type': 'var', 'key': key, 'val': value})
 
 from workspace_tools.settings import ARM_BIN
-from workspace_tools.settings import GCC_ARM_PATH, GCC_CR_PATH, GCC_CS_PATH, CW_EWL_PATH, CW_GCC_PATH
+from workspace_tools.settings import GCC_ARM_PATH, GCC_CR_PATH
 from workspace_tools.settings import IAR_PATH
 
 TOOLCHAIN_BIN_PATH = {
     'ARM': ARM_BIN,
     'uARM': ARM_BIN,
     'GCC_ARM': GCC_ARM_PATH,
-    'GCC_CS': GCC_CS_PATH,
     'GCC_CR': GCC_CR_PATH,
-    'GCC_CW_EWL': CW_EWL_PATH,
-    'GCC_CW_NEWLIB': CW_GCC_PATH,
     'IAR': IAR_PATH
 }
 
 from workspace_tools.toolchains.arm import ARM_STD, ARM_MICRO
-from workspace_tools.toolchains.gcc import GCC_ARM, GCC_CS, GCC_CR
-from workspace_tools.toolchains.gcc import GCC_CW_EWL, GCC_CW_NEWLIB
+from workspace_tools.toolchains.gcc import GCC_ARM, GCC_CR
 from workspace_tools.toolchains.iar import IAR
 
 TOOLCHAIN_CLASSES = {
     'ARM': ARM_STD,
     'uARM': ARM_MICRO,
     'GCC_ARM': GCC_ARM,
-    'GCC_CS': GCC_CS,
     'GCC_CR': GCC_CR,
-    'GCC_CW_EWL': GCC_CW_EWL,
-    'GCC_CW_NEWLIB': GCC_CW_NEWLIB,
     'IAR': IAR
 }
 
diff --git a/workspace_tools/toolchains/gcc.py b/workspace_tools/toolchains/gcc.py
index f746a197329..ec43c7fa5ee 100644
--- a/workspace_tools/toolchains/gcc.py
+++ b/workspace_tools/toolchains/gcc.py
@@ -18,7 +18,7 @@
 from os.path import join, basename, splitext
 
 from workspace_tools.toolchains import mbedToolchain
-from workspace_tools.settings import GCC_ARM_PATH, GCC_CR_PATH, GCC_CS_PATH, CW_EWL_PATH, CW_GCC_PATH
+from workspace_tools.settings import GCC_ARM_PATH, GCC_CR_PATH
 from workspace_tools.settings import GOANNA_PATH
 from workspace_tools.hooks import hook_tool
 
@@ -213,50 +213,3 @@ def __init__(self, target, options=None, notify=None, macros=None, silent=False,
             self.ld.extend(["-u _printf_float", "-u _scanf_float"])
         self.ld += ["-nostdlib"]
 
-
-class GCC_CS(GCC):
-    def __init__(self, target, options=None, notify=None, macros=None, silent=False, extra_verbose=False):
-        GCC.__init__(self, target, options, notify, macros, silent, GCC_CS_PATH, extra_verbose=extra_verbose)
-
-
-class GCC_CW(GCC):
-    ARCH_LIB = {
-        "Cortex-M0+": "armv6-m",
-    }
-
-    def __init__(self, target, options=None, notify=None, macros=None, silent=False, extra_verbose=False):
-        GCC.__init__(self, target, options, notify, macros, silent, CW_GCC_PATH, extra_verbose=extra_verbose)
-
-
-class GCC_CW_EWL(GCC_CW):
-    def __init__(self, target, options=None, notify=None, macros=None, silent=False, extra_verbose=False):
-        GCC_CW.__init__(self, target, options, notify, macros, silent, extra_verbose=extra_verbose)
-
-        # Compiler
-        common = [
-            '-mfloat-abi=soft',
-            '-nostdinc', '-I%s' % join(CW_EWL_PATH, "EWL_C", "include"),
-        ]
-        self.cc += common + [
-            '-include', join(CW_EWL_PATH, "EWL_C", "include", 'lib_c99.prefix')
-        ]
-        self.cppc += common + [
-            '-nostdinc++', '-I%s' % join(CW_EWL_PATH, "EWL_C++", "include"),
-            '-include', join(CW_EWL_PATH, "EWL_C++", "include", 'lib_ewl_c++.prefix')
-        ]
-
-        # Linker
-        self.sys_libs = []
-        self.CIRCULAR_DEPENDENCIES = False
-        self.ld = [join(CW_GCC_PATH, "arm-none-eabi-g++"),
-            "-Xlinker --gc-sections",
-            "-L%s" % join(CW_EWL_PATH, "lib", GCC_CW.ARCH_LIB[target.core]),
-            "-n", "-specs=ewl_c++.specs", "-mfloat-abi=soft",
-            "-Xlinker --undefined=__pformatter_", "-Xlinker --defsym=__pformatter=__pformatter_",
-            "-Xlinker --undefined=__sformatter", "-Xlinker --defsym=__sformatter=__sformatter",
-        ] + self.cpu
-
-
-class GCC_CW_NEWLIB(GCC_CW):
-    def __init__(self, target, options=None, notify=None, macros=None, silent=False, extra_verbose=False):
-        GCC_CW.__init__(self, target, options, notify, macros, silent, extra_verbose=extra_verbose)