diff --git a/project_generator/templates/cmakelistgccarm.tmpl b/project_generator/templates/cmakelistgccarm.tmpl
index 421807bb..74075713 100644
--- a/project_generator/templates/cmakelistgccarm.tmpl
+++ b/project_generator/templates/cmakelistgccarm.tmpl
@@ -64,7 +64,7 @@ set(SOURCES_S ${SOURCES_S} "{{file}}"){% endfor %}
 {% for file in source_files_obj %}
 set(OBJECT_FILES ${OBJECT_FILES} "{{file}}"){% endfor %}
 
-set(COMMON_FLAGS "-mcpu={{core}} {% for flag in misc['common_flags'] %} {{flag}}{% endfor %}")
+set(COMMON_FLAGS "-mcpu={{core}} -mthumb {% for flag in misc['common_flags'] %} {{flag}}{% endfor %}")
 set(CMAKE_CXX_FLAGS "${COMMON_FLAGS} ${DEFINES} {% for flag in misc['cxx_flags'] %} {{flag}}{% endfor %}")
 set(CMAKE_C_FLAGS "${COMMON_FLAGS} ${DEFINES} {% for flag in misc['c_flags'] %} {{flag}}{% endfor %}")
 set(CMAKE_EXE_LINKER_FLAGS "-mcpu={{core}} {% for flag in misc['linker_flags'] %} {{flag}}{% endfor %}")
diff --git a/project_generator/tools/cmake.py b/project_generator/tools/cmake.py
index 41fa9a9d..8d3e946b 100644
--- a/project_generator/tools/cmake.py
+++ b/project_generator/tools/cmake.py
@@ -13,14 +13,26 @@
 # limitations under the License.
 
 import copy
+import logging
+import subprocess
 from os import getcwd
+from os.path import dirname
 
 from .tool import Tool, Exporter
 from .gccarm import MakefileGccArm
 from ..util import SOURCE_KEYS
 
+logger = logging.getLogger('progen.tools.cmake_gcc_arm')
+
 class CMakeGccArm(Tool,Exporter):
 
+    SUCCESSVALUE = 0
+    ERRORLEVEL = {
+        0: 'no errors)',
+        1: 'targets not already up to date',
+        2: 'errors'
+    }
+
     generated_project = {
         'path': '',
         'files': {
@@ -82,3 +94,56 @@ def export_project(self):
 
     def get_generated_project_files(self):
         return {'path': self.workspace['path'], 'files': [self.workspace['files']['cmakelist']]}
+
+    def build_project(self):
+        # cwd: relpath(join(project_path, ("gcc_arm" + project)))
+        # > make all
+        path = dirname(self.workspace['files']['cmakelist'])
+        logging.debug("Building GCC ARM project: %s" % path)
+
+        args = ['cmake', '.']
+        logging.debug(args)
+
+        try:
+            ret_code = None
+            ret_code = subprocess.call(args, cwd=path)
+        except:
+            logging.error("Project: %s build error whilst calling cmake. Is it in your PATH?" % self.workspace['files']['cmakelist'])
+            return -1
+        else:
+            if ret_code != self.SUCCESSVALUE:
+                # Seems like something went wrong.
+                if ret_code < 3:
+                    logging.error("Project: %s build failed with the status: %s" %
+                                  (self.ERRORLEVEL[ret_code], self.workspace['files']['makefile']))
+                else:
+                    logging.error("Project: %s build failed with unknown error. Returned: %s" %
+                                   (ret_code, self.workspace['files']['makefile']))
+                return -1
+            else:
+                logging.info("CMake succeeded with the status: %s" %
+                             self.ERRORLEVEL[ret_code])
+
+                args = ['make', 'all']
+                logging.debug(args)
+
+                try:
+                    ret_code = None
+                    ret_code = subprocess.call(args, cwd=path)
+                except:
+                    logging.error("Project: build error whilst calling make. Is it in your PATH?")
+                    return -1
+                else:
+                    if ret_code != self.SUCCESSVALUE:
+                        # Seems like something went wrong.
+                        if ret_code < 3:
+                            logging.error("Project: make failed with the status: %s" %
+                                        (self.ERRORLEVEL[ret_code]))
+                        else:
+                            logging.error("Project:make failed with unknown error. Returned: %s" %
+                                        (ret_code))
+                        return -1
+                    else:
+                        logging.info("Build succeeded with the status: %s" %
+                                    self.ERRORLEVEL[ret_code])
+                        return 0
diff --git a/tests/test_commands/test_build.py b/tests/test_commands/test_build.py
index 051268bd..08fa9128 100644
--- a/tests/test_commands/test_build.py
+++ b/tests/test_commands/test_build.py
@@ -98,6 +98,13 @@ def test_build_project_make_gcc_arm_tool(self):
 
         assert result == -1
 
+    def test_build_project_cmake_gcc_arm_tool(self):
+        args = self.parser.parse_args(['build','-f','test_workspace/projects.yaml','-p',
+            'project_2', '-t', 'cmake_gcc_arm'])
+        result = build.run(args)
+
+        assert result == -1
+
     def test_build_project_make_armcc_tool(self):
         args = self.parser.parse_args(['build','-f','test_workspace/projects.yaml','-p',
             'project_2', '-t', 'make_armcc'])