Build Julia from source on MacOSX/Ubuntu

Feature

• We've confirmed my Mac machine succeeded to build Julia from source at master (2020/08/15)

               _
   _       _ _(_)_     |  Documentation: https://docs.julialang.org
  (_)     | (_) (_)    |
   _ _   _| |_  __ _   |  Type "?" for help, "]?" for Pkg help.
  | | | | | | |/ _` |  |
  | | |_| | | | (_| |  |  Version 1.6.0-DEV.646 (2020-08-15)
 _/ |\__'_|_|_|\__'_|  |  Commit d47f7d0827 (1 day old master)
|__/                   |           |

• We've confirmed our Makefile works fine On my Ubuntu 16.04 PC

Build

$ cd path/to/this/README.md
$ make
# just wait

Install

$ make install # you may need to add `sudo`

• It will create directory named ~/julia_dev.
• You can call the latest julia via ~/julia_dev/bin/julia
• Or simply set alias on ~/.bash_profile for example :

alias jldev="$HOME/julia_dev/bin/julia"

Clean up

make reset

References

• julia/doc/build
• How can I write a makefile to auto-detect and parallelize the build with GNU Make?
• Conditionals in Makefile: missing separator error?