make/linux.mk

   1 # linux.mk
   2 #
   3 # Goals:
   4 #   Configure an environment that will allow Taulabs GCS and firmware to be built
   5 #   on a Linux system. The environment will support the current versions of Qt SDK
   6 #   and the ARM toolchain installed to either the Taulabs/tools directory, their
   7 #   respective default installation locations, or made available on the system path.
   8
   9 # Check for and find Python 2
  10
  11 # Get Python version, separate major/minor/patch, then put into wordlist
  12 PYTHON_VERSION_=$(wordlist 2,4,$(subst ., ,$(shell python -V 2>&1)))
  13 # Get major version from aforementioned list
  14 PYTHON_MAJOR_VERSION_=$(word 1,$(PYTHON_VERSION_))
  15 # Just in case Make has some weird scope stuff
  16 PYTHON=0
  17 # If the major Python version is the one we want..
  18 ifeq ($(PYTHON_MAJOR_VERSION_),2)
  19         # Then we can just use the normal Python executable
  20         PYTHON:=python
  21 else
  22         # However, this isn't always the case..
  23         # Let's look for `python2`. If `which` doesn't return a null value, then
  24         #  it exists!
  25         ifneq ($(shell which python2), "")
  26                 PYTHON:=python2
  27         else
  28                 # And if it doesn't exist, let's use the default Python, and warn the user.
  29                 # PYTHON NOT FOUND.
  30                 PYTHON:=python
  31                 echo "Python not found."
  32         endif
  33 endif
  34
  35 export PYTHON