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py/mkenv.mk: Change default PYTHON variable from "python" to "python3". 

This change makes it so that python3 is required by default to build
MicroPython. Python 2 can be used by specifying make PYTHON=python2.

This comes about due to a recent-ish change to PEP 394 that makes the
python command more optional than before (even with Python 2 installed);
see cd59ec03c8 (diff-1d22f7bd72cbc900670f058b1107d426)

Since the command python is no longer required to be provided by a
distribution we need to use either python2 or python3 as commands.  And
python3 seems the obvious choice.
This commit is contained in:
Damien George 2019-01-31 18:22:12 +11:00
parent 6e30f96b0b
commit 5368210e36
2 changed files with 4 additions and 2 deletions
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4
README.md
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@ -60,7 +60,9 @@ Additional components:
The subdirectories above may include READMEs with additional info. The subdirectories above may include READMEs with additional info.
"make" is used to build the components, or "gmake" on BSD-based systems. "make" is used to build the components, or "gmake" on BSD-based systems.
You will also need bash, gcc, and Python (at least 2.7 or 3.3). You will also need bash, gcc, and Python 3.3+ available as the command `python3`
(if your system only has Python 2.7 then invoke make with the additional option
`PYTHON=python2`).
The Unix version The Unix version
---------------- ----------------

2
py/mkenv.mk
View File

@ -42,7 +42,7 @@ ECHO = @echo
CP = cp CP = cp
MKDIR = mkdir MKDIR = mkdir
SED = sed SED = sed
PYTHON = python PYTHON = python3
AS = $(CROSS_COMPILE)as AS = $(CROSS_COMPILE)as
CC = $(CROSS_COMPILE)gcc CC = $(CROSS_COMPILE)gcc