Merge pull request #590 from cchampet/fix_cmakeBuildWithoutPythonNorSWIG

CMake: fix some errors if some dependencies are not found

Author: cchampet

applications/CMakeLists.txt

@@ -5,7 +5,7 @@ add_subdirectory(sam)
 add_subdirectory(script)
 
 # Edit python scripts if the host is built with python3
-if(${TUTTLE_PYTHON_VERSION} VERSION_GREATER "3")
+if(${TUTTLE_PYTHON_VERSION} and ${TUTTLE_PYTHON_VERSION} VERSION_GREATER "3")
     set(BASH_PYTHON2 "#!/usr/bin/env python")
     set(BASH_PYTHON3 "#!/usr/bin/env python3")
 

applications/sam/CMakeLists.txt

@@ -1,4 +1,8 @@
 ## sam
+find_package(SWIG)
+if(NOT SWIG_FOUND)
+    return()
+endif()
 
 set(TUTTLE_INSTALL_SAM_PYTHON "bin/python/sam")